AQD - Aggregation Process
type: ConceptScheme
notation: aggregationprocess
is part of: aq
registration status: Released
user modified: colinmar
date modified: 2025-07-10 12:51:57.0
vocabulary type: Common
is numeric concept identifiers: false
is notations equal identifiers: true

AOT40 vegetation protection
type: Concept
notation: AOT40c
definition: Accumulated Ozone Exposure 40 (expressed in (ug/m3) XXX hours) means the sum of the difference between hourly concentrations greater than 80 ug/m3 and 80 ug/m3 between 1 May to 31 July using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.4 of the Aggregation Document
broader metric: AOT40c
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

AOT40 vegetation protection averaged over 5 years
type: Concept
notation: AOT40c-P5Y
definition: AOT40 vegetation protection (AOT40) averaged over 5 years. Following Directive 2008/50/EC: If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data- the minimum annual data required for checking compliance with the target values will be as follows for the target value for the protection of vegetation: valid data for three years.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.4 of the Aggregation Document
broader metric: AOT40c-5yr
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

Number of valid hourly value for AOTc calculations
type: Concept
notation: AOT40c-nv
definition: Number of valid hourly values (flag 1, 2, 3) between StartTime => 07:00 UTC and EndTime =< 19:00 AND YYYY-05-01T01:00:00+00:00 and YYYY-07-31T24:00:00+00:00
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process

AOT40c UNCORRECTED for data capture
type: Concept
notation: AOT40cmeasured
definition: SUM of all AOT40h between YYYY-05-01T01:00:00+00:00 and YYYY-07-31T24:00:00+00:00
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process

Number of valid hourly value for AOTf calculations
type: Concept
notation: AOT40f-nv
definition: Number of valid hourly values (flag 1, 2, 3) between StartTime => 07:00 UTC and EndTime =< 19:00 AND YYYY-04-01T01:00:00+00:00 and YYYY-09-31T24:00:00+00:00)
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process

AOT40f UNCORRECTED for data capture
type: Concept
notation: AOT40fmeasured
definition: SUM of all AOT40h between YYYY-04-01T01:00:00+00:00 and YYYY-09-31T24:00:00+00:00
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process

Preliminary hourly calculation for AOT40 for AOT40c & AOT40f
type: Concept
notation: AOT40h
definition: max (0, hourly concentration - 80) for hours with StartTime => 07:00 UTC and EndTime =< 19:00 and period YYYY-04-01T01:00:00+00:00 and YYYY-09-31T24:00:00
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
broader metric: AOT40 vegetation protection
broader metric: AOT40c
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

Daily average (24-hour mean)
type: Concept
notation: P1D
definition: The daily average or daily mean is the average of all valid hourly values for a day. A daily or 24-hourly average is calculated if at least 18 valid hourly values are available.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Base aggregation - described in section 3.1 of Aggregation document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

Data capture of hourly values in 1 day
type: Concept
notation: P1D-dc
definition: Data capture for one day. This is an aggregation type added by EEA
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Internal calculation - described in section 4.1.1 of Aggregation document

1 day hour max
type: Concept
notation: P1D-hr-max
definition: The highest hourly value of the day
status: valid
status modified: 2021-08-13
in scheme: AQD - Aggregation Process

1 day exceed 180
type: Concept
notation: P1D-hrsAbove180
definition: Number of hours with values higher than 180 (unit) in given day
status: valid
status modified: 2021-08-13
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 day exceed 240
type: Concept
notation: P1D-hrsAbove240
definition: Number of hours with values higher than 240 (unit) in given day
status: valid
status modified: 2021-08-13
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 day missing data fractions
type: Concept
notation: P1D-mf
definition: Data fractions missing due to calibration or station repaire. This is an aggregation type added by EEA
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Internal calculation - described in section 4 of Aggregation document

Monthly average
type: Concept
notation: P1M
definition: Average between 1 hour/day of month X to last hour/day of month X (example for 31 days month: 1/X/YearY - 31/X/YearY)
status: valid
status modified: 2018-05-04
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/9
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5029

1 month daymax exceed 100
type: Concept
notation: P1M-dmaxAbove100
definition: Number of days with daymax (P8H-dmax) values higher than 100 (unit) in given month
status: valid
status modified: 2021-08-13
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 month daymax exceed 120
type: Concept
notation: P1M-dmaxAbove120
definition: Number of days with daymax (P8H-dmax) values higher than 120 (unit) in given month
status: valid
status modified: 2021-08-13
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year exceed 180
type: Concept
notation: P1M-hrsAbove180
definition: Number of hours with values higher than 180 (unit) in given month
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year exceed 200
type: Concept
notation: P1M-hrsAbove200
definition: Number of hours with values higher than 200 (unit) in given month
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document

1 year exceed 240
type: Concept
notation: P1M-hrsAbove240
definition: Number of hours with values higher than 240 (unit) in given month
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document

1 year exceed 350
type: Concept
notation: P1M-hrsAbove350
definition: Number of hours with values higher than 350 (unit) in given month
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document

1 year exceed 400
type: Concept
notation: P1M-hrsAbove400
definition: Number of hours with values higher than 400 (unit) in given month
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document

Annual mean / 1 calendar year
type: Concept
notation: P1Y
definition: Average between 1st January to 31st December Year X (1/1/YearX - 31/12/YearX)
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.1 of Aggregation document (Averages and means)
broader metric: aMean

3 consecutive days in exceedance of 50
type: Concept
notation: P1Y-3daysAbove50
definition: Number of periods when 3 consecutive days are higher than 50 in a given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: 3dAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001

3 consecutive days in exceedance of 90
type: Concept
notation: P1Y-3daysAbove90
definition: Number of periods when 3 consecutive days are higher than 90 in a given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: 3dAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

3 consecutive hours in exceedance of 200
type: Concept
notation: P1Y-3hAbove200
definition: Number of periods when 3 consecutive hours are higher than 200 in a given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: 3hAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

3 consecutive hours in exceedance of 350
type: Concept
notation: P1Y-3hAbove350
definition: Number of periods when 3 consecutive hours are higher than 350 in a given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: 3hAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

3 consecutive hours in exceedance of 400
type: Concept
notation: P1Y-3hAbove400
definition: Number of periods when 3 consecutive hours are higher than 400 in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.3 of the Aggregation Document
broader metric: 3hAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

3 consecutive hours in exceedance of 500
type: Concept
notation: P1Y-3hAbove500
definition: Number of periods when 3 consecutive hours are higher than 500 in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.3 of the Aggregation Document
broader metric: 3hAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year daymax exceed 10
type: Concept
notation: P1Y-8hdmxAbove10
definition: Number of days with daymax values (P8H_dmax) higher than 10 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10

1 year 90.4 percentile - COMPLIANCE
type: Concept
notation: P1Y-P1D-per90.4
definition: The 90.4th percentile of daily averages (P1D) in a given year Aggregation for Compliance.
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year 90.41 percentile
type: Concept
notation: P1Y-P1D-per90.41
definition: The 90.41th percentile of daily averages (P1D) in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year 95.07 percentile of daily means (P1D) or .../aq/primaryObservation/day
type: Concept
notation: P1Y-P1D-per95.07
definition: The 95.07th percentile of daily averages in a given year associated to New Directive for pollutants (corresponding with the 19th highest daily value)
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year 99 percentile of daily means (P1D) or .../aq/primaryObservation/day
type: Concept
notation: P1Y-P1D-per99
definition: The 99th percentile of daily averages in a given year associated to WHO guidelines for pollutants PM10 (5), PM2.5 (6001), NO2 (8), SO2 (1) and CO (10)
status: valid
status modified: 2017-03-22
accepted date: 2021-12-20
in scheme: AQD - Aggregation Process
scope note: New aggregates for new AQ 2021 WHO guidelines
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year 99.18 percentile of daily value/mean (see P1Y-day-max-per99.18)
type: Concept
notation: P1Y-P1D-per99.18
definition: The 99.18th percentile of daily averages (P1Y-P1D) in a given year (corresponding with the 4th highest daily value) - Aggregation uses P1Y-day-max-per99.18
status: valid
status modified: 2017-12-14
in scheme: AQD - Aggregation Process

yearly mean weighted average
type: Concept
notation: P1Y-WA-avg
definition: The mean for a multi-__day sampler based data types shall be evaluated in a similar way to the data capture (see section 4.2)- although in this instance is calculated as the time weighted mean of valid measurements over the sample period. mean = _i DCi * Nvalid-i Cvalid-i / _i DCi * Nvalid-i i=1.... n where DCi = the data capture of sample i Nvalid-i = the number of hours of the valid sampling period i Cvalid-i = concentration for valid sampling period i
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
broader metric: aMean

1 year weighted average data capture
type: Concept
notation: P1Y-WA-dc
definition: The data capture for multi day sampler based data types integrated over an averaging period is calculated as the proportion of valid measurement time (at a minimum seconds- alternatively decimal hours or days) relative total measured time in the averaging period- expressed as an percentage. The data capture for a given averagingperiod shall be calculated as follows: Data capture = _i DCi * Nvalid-i / _i Ni * 100 % where DCi = the data capture (in %) of the valid sample I- that is- the effective sampling time in a measuring period Nvalid-i = the number of hours in the valid sample i (validity flag sample > 0) Ni = number of hours in sample i
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process

1 year weighted average time coverage
type: Concept
notation: P1Y-WA-tc
definition: The time coverage is the percentage of measurement time in a given averaging period. Also the time coverage is calculated on base of the number of hours in the sample periods. The time coverage for a given averaging period is calculated as follows (weighted average): Time coverage = _i TCi * Ni / Naveraging_period * 100 % where TCi = the time coverage of sample i Ni = number of hours in sample i Naveraging_period = the total number of hours in the given averaging period (e.g. a year)
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process

1 year day max
type: Concept
notation: P1Y-day-max
definition: The highest daily value of the year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation - described in section 5.2.2 of the Aggregation Document

1 year 99.18 percentile of daily MEAN (P1Y-P1D-per99.18)
type: Concept
notation: P1Y-day-max-per99.18
definition: The 99.18th percentile of daily MEAN (P1Y-P1D) in a given year (corresponding with the 4th highest daily value) - DESCRIPTION UPDATE - notation SHOULD REALLY BE P1Y-P1D-per99.18
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year day max 36
type: Concept
notation: P1Y-day-max36
definition: The 36th highest daily average value in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year day max 4
type: Concept
notation: P1Y-day-max4
definition: The 4th highest daily value in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year day min
type: Concept
notation: P1Y-day-min
definition: The lowest daily value of the year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation

1 year 50 %ile of daily values in a year
type: Concept
notation: P1Y-day-per50
definition: The 50th percentile of DAILY values in a given year
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process

1 year exceed 100
type: Concept
notation: P1Y-daysAbove100
definition: Number of days with values higher than 100 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove

1 year day exceed 125
type: Concept
notation: P1Y-daysAbove125
definition: Number of days with daily average values higher than 125 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year day exceed 25
type: Concept
notation: P1Y-daysAbove25
definition: Number of days with daily average values higher than 25 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001

1 year day exceed 4
type: Concept
notation: P1Y-daysAbove4
definition: Number of days with daily average values higher than 4 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10

1 year day exceed 45
type: Concept
notation: P1Y-daysAbove45
definition: Number of days with daily average values higher than 45 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year day exceed 50
type: Concept
notation: P1Y-daysAbove50
definition: Number of days with daily average values higher than 50 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/6001
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

1 year day exceed 90
type: Concept
notation: P1Y-daysAbove90
definition: Number of days with daily average values higher than 90 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/5

Data capture of reported units in 1 year
type: Concept
notation: P1Y-dc
definition: Data capture of primary reported units (like hour/day XXX) for the given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 4.1.1 of Aggregation document

1 year 93.15 percentile daily 8h maximum
type: Concept
notation: P1Y-dmax-per93.15
definition: The 93.15th percentile of daily 8h maximum (P8H-dmax) in a given year
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year 95.07 percentile daily 8h maximum
type: Concept
notation: P1Y-dmax-per95.07
definition: The 95.07th percentile of daily 8h maximum (P8H-dmax) in a given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year 99 percentile daily 8h maximum
type: Concept
notation: P1Y-dmax-per99
definition: The 99th percentile of daily 8h maximum (P8H-dmax) in a given year
status: valid
status modified: 2022-03-16
accepted date: 2022-03-16
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year daymax exceed 100
type: Concept
notation: P1Y-dmaxAbove100
definition: Number of days with daymax (P8H-dmax) values higher than 100 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year daymax exceed 120
type: Concept
notation: P1Y-dmaxAbove120
definition: Number of days with daymax (P8H-dmax) values higher than 120 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year daymax average
type: Concept
notation: P1Y-dx-avg
definition: Average day max value between 1st January to 31st December Year X (1/1/YearX - 31/12/YearX)
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 3.1 of Aggregation document

Data capture of daily maximum values in 1 year
type: Concept
notation: P1Y-dx-dc
definition: Day max data capture for given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 4.1.1 of Aggregation document

1 year P8H-dmax
type: Concept
notation: P1Y-dx-max
definition: The highest P8H-dmax value in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation - described in section 5.2.2 of the Aggregation Document
scope note: It is the highest P8H-dmax (https://dd.eionet.europa.eu/vocabularyconcept/aq/aggregationprocess/P8H-dmax/view) value in a year, and because of that, only calculated for O3 and CO.

1 year daymax max 26
type: Concept
notation: P1Y-dx-max26
definition: The 26th highest daymax value in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year day-max min
type: Concept
notation: P1Y-dx-min
definition: The lowest day max value in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation

1 year day-max Nvalid
type: Concept
notation: P1Y-dx-nv
definition: Number of valid daymax values in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Internal calculation - described in section 4 of Aggregation document

1 year hour max
type: Concept
notation: P1Y-hr-max
definition: The highest hourly value of the year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation

1 year 99.73 %ile of hourly values in a given year
type: Concept
notation: P1Y-hr-max-per99.73
definition: The 99.73th percentile of hourly values (/hour) in a given year (equivalent to 25th highest hourly value)
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year 99.79 %ile of hourly values in a given year
type: Concept
notation: P1Y-hr-max-per99.79
definition: The 99.79 percentile of hourly values in a given year (corresponding to 19th highest hourly value)
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year 99.97 %ile of hourly values in a given year
type: Concept
notation: P1Y-hr-max-per99.97
definition: The 99.97th percentile of hourly values (/hour) in a given year (equivalent to 4th highest hourly value)
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year hour max19
type: Concept
notation: P1Y-hr-max19
definition: The 19th highest hourly value in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year hour max 25
type: Concept
notation: P1Y-hr-max25
definition: The 25th highest hourly value in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year hour min
type: Concept
notation: P1Y-hr-min
definition: The lowest hourly value of the year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Extra aggregation

1 year 50 percentile
type: Concept
notation: P1Y-hr-per50
definition: The 50th percentile of HOURLY values in a given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.2.1 of the Aggregation Document

1 year hour exceed 150
type: Concept
notation: P1Y-hrsAbove150
definition: Number of hours with values higher than 150 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year hour exceed 180
type: Concept
notation: P1Y-hrsAbove180
definition: Number of hours with values higher than 180 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year hour exceed 200
type: Concept
notation: P1Y-hrsAbove200
definition: Number of hours with values higher than 200 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

1 year hour exceed 240
type: Concept
notation: P1Y-hrsAbove240
definition: Number of hours with values higher than 240 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year hour exceed 275
type: Concept
notation: P1Y-hrsAbove275
definition: Number of hours with values higher than 275 (unit) in given year
status: valid
status modified: 2024-10-29
accepted date: 2024-10-29
in scheme: AQD - Aggregation Process
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year hour exceed 350
type: Concept
notation: P1Y-hrsAbove350
definition: Number of hours with values higher than 350 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

1 year hour exceed 400
type: Concept
notation: P1Y-hrsAbove400
definition: Number of hours with values higher than 400 (unit) in given year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: hrsAbove
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/8

Yearly highest six monthly average of daily maximum 8-hour mean concentration
type: Concept
notation: P1Y-maxP6M-P8H-dmax
definition: Average of daily maxiumum 8-hour mean concentration in the six consecutive months (P6M-P8H-dmax) with the highest P6M-P8H-dmax in the year
status: valid
status modified: 2022-03-07
accepted date: 2022-03-07
in scheme: AQD - Aggregation Process
scope note: Author's note: this differs to P1Y-peakP6M-P8H-dmax where the yearly 6 month average is selected according to the highest six-month running-average concentration (highest P6M in the year).
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

1 year Ntotal
type: Concept
notation: P1Y-nt
definition: Total number of primary reported units (like hours/days XXX) in current year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Internal calculation - described in section 4 of Aggregation document

1 year Nvalid
type: Concept
notation: P1Y-nv
definition: Total number of valid primary reported units (like hours/days...) in current year
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Internal calculation - described in section 4 of Aggregation document

P1Y-peakP6M-P8H-dmax
type: Concept
notation: P1Y-peakP6M-P8H-dmax
definition: Average of daily maxiumum 8-hour mean concentration in the six consecutive months (P6M-P8H-dmax) with the highest six-month running-average concentration (highest P6M in the year).
status: valid
status modified: 2021-12-23
accepted date: 2021-12-23
in scheme: AQD - Aggregation Process
scope note: ETC has done some work on the proposed methodology for P1Y-peakP6M-P8H-dmax and agreed with EEA, we have decided to simplify the process and calculate, for now, P1Y-maxP6M-P8H-dmax P1Y-maxP6M-P8H-dmax is the maximum P6M-P8H-dmax of the year (using date-end. NOTE: remember that you are storing end date as 01/XX/YYYY instead of end of the period). DC should be calculated base on the number of P6M-P8h-dmax valid in the year and following similar approach for DataCapture, MissingData and TimeCoverage. Example: if for 2020 we have 12 P6M-P8h-dmax with end time within 2020 of which 11 are valid (above 75% DC) then, the DC for P1Y-maxP6M-P8h-dmax will be 11/12 -> 91.67%
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

3 subsequent calendar years mean
type: Concept
notation: P3Y
definition: Three-year running mean concentration. Average between 1st January Year X-2 to 31st December Year X (1/1/Year X-2 - 31/12/Year X)
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process

Daymax exceed 120 averaged over 3 consecutive years
type: Concept
notation: P3Y-dmaxAbove120
definition: Number of days with daymax values higher than 120 (unit) averaged over 3 years
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Described in section 5.3.2 of the Aggregation Document
broader metric: daysAbove-3yr
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

6 monthly average
type: Concept
notation: P6M
definition: Average between 1 hour/day of month X-5 to last hour/day of month X (example for first 6 month's in the year: 1/1/2021 to 31/6/2021) (example for months between years: 1/8/2021 to 31/1/2022)
status: valid
status modified: 2021-12-23
accepted date: 2021-12-23
in scheme: AQD - Aggregation Process
scope note: For new WHO AQ Guidelines
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

Average of the daily maximum eight-hour mean (P8H-dmax) in 6 consecutive months
type: Concept
notation: P6M-P8H-dmax
definition: Average of the daily maximum eight-hour mean (P8H-dmax) in 6 consecutive months.
status: valid
status modified: 2021-12-23
accepted date: 2021-12-23
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

Maximum daily eight-hour mean
type: Concept
notation: P8H-dmax
definition: The daily maximum 8-hour running mean for a day is the maximum of the valid hourly 8-hour running means for that day. A daily maximum 8-hour mean is calculated if at least 18 valid hourly 8-hour running means are available for that particular day.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Base aggregation - described in section 3.2 of Aggregation document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

8-hour running mean
type: Concept
notation: P8H-run
definition: The 8-hour running mean value for each hour is calculated as the average of the valid values for that hour and the 7 foregoing hours (averaging period). So- the averaging period of hour1 of dayn is hour17 of dayn-1 until hour1 of dayn. The averaging period of hour24 of dayn is hour16 of dayn until hour24 of dayn. A 8-hourly running averaged concentration is calculated if at least 6 valid hourly values are available.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Base aggregation - described in section 3.2 of Aggregation document
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/10

Sum of Ozone Means Over 10 ppb
type: Concept
notation: SOMO10
definition: For quantification of the health impacts the World Health Organisation recommends the use of the SOMO35 indicator. SOMO10 stands for means the sum of the differences between maximum daily 8-hour running mean concentrations greater than 20 µg/m3 (= 10 parts per billion) and 20 µg/m3
status: valid
status modified: 2020-03-05
in scheme: AQD - Aggregation Process

Sum of Ozone Means Over 35 ppb
type: Concept
notation: SOMO35
definition: For quantification of the health impacts the World Health Organisation recommends the use of the SOMO35 indicator. SOMO35 stands for means the sum of the differences between maximum daily 8-hour running mean concentrations greater than 70 µg/m3 (= 35 parts per billion) and 70 µg/m3
status: valid
status modified: 2014-06-03
accepted date: 2014-06-03
in scheme: AQD - Aggregation Process
scope note: Not yet described
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7

High summer mean
type: Concept
notation: highsummer
definition: Average between 1st May to 31th July Year X.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.1 of Aggregation document (Averages and means)

Summer mean
type: Concept
notation: summer-avg
definition: Average between 1st April to 30th September Year X.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.1 of Aggregation document (Averages and means)

Winter mean
type: Concept
notation: winter-avg
definition: Average between 1st October Year X-1 to 31st March Year X.
status: valid
status modified: 2014-04-15
accepted date: 2014-04-15
in scheme: AQD - Aggregation Process
scope note: Described in section 5.1 of Aggregation document (Averages and means)
broader metric: wMean
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/1

AOT40 forest protection
type: Concept
notation: AOT40f
definition: Accumulated Ozone Exposure 40 (expressed in (ug/m3) XXX hours) means the sum of the difference between hourly concentrations greater than 80 ug/m3 and 80 ug/m3 between 1 April to 30 September using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day.
status: valid
status modified: 2025-07-10
accepted date: 2025-07-10
in scheme: AQD - Aggregation Process
related pollutant: http://dd.eionet.europa.eu/vocabulary/aq/pollutant/7