WMO OSCAR | Details for Variable: O3 Total Column

Variable: O3 Total Column

Definition

Full name	O3 Total Column
Definition	2D field of total amount of O3 molecules per unit area in an atmospheric column extending from the Earth’s surface to the upper edge of the atmosphere (Dobson units).
Measuring Units	% (directly transferrable to Dobson units)	Uncertainty Units	%
Horizontal Res Units	km	Vertical Res Units
Stability Units	% (Stability /decade)

Comment:
Last modified:	2025-08-04
Applied in OSCAR/Space Gap Analysis:	Yes

Classification

Domain: Atmosphere
- Sub-domain: Atmospheric chemistry
  - Variable: O3 Total Column
    - Measured in Layers:
      - TC
      - TrC

Cross-cutting themes:

Earth System Application Categories and its related Application Areas:
- 2. Atmospheric Applications
- 2. Atmospheric Applications
- 2. Atmospheric Applications
- 2. Atmospheric Applications
Unknown:

Requirements defined for O3 Total Column (9)

This tables shows all related requirements. For more operations/filtering, please consult the full list of Requirements
Note: In reading the values, goal is marked blue, breakthrough green, threshold orange
Application-dependent Technical Priority (ATP) Magenta and Relative priority of the attributes Red

Id	Variable	Layer	App Area	ATP	Uncertainty	Stability / decade	Hor Res	Obs Cyc	Timeliness	Coverage	Conf Level	Val Date	Source	General Comment
102	O3 Total Column	TC	Climate-AOPC (deprecated)		5 % 8 % 15 %		5 km 10 km 50 km	3 h 9 h 3 d	30 d 60 d 180 d	Global	firm	2007-07-19	AOPC
103	O3 Total Column	TrC	Climate-AOPC (deprecated)		5 % 8 % 15 %		5 km 10 km 50 km	3 h 9 h 3 d	30 d 60 d 180 d	Global	firm	2007-07-19	AOPC
184	O3 Total Column	TC	Atmospheric Chemistry (deprecated)		6 % 9 % 20 %		25 km 39.7 km 100 km	6 h 12 h 2 d	3 h 12 h 7 d	Global	firm	2002-05-24	GAW Report No. 159	UVB pred/anal, Dynamics
286	O3 Total Column	TC	2.1 Global Numerical Weather Prediction and Real-time Monitoring		5 % 10 % 20 %		15 km 100 km 250 km	60 min 6 h 12 h	6 min 30 min 6 h	Global	firm	2009-02-10	John Eyre
367	O3 Total Column	TC	2.2 High-Resolution Numerical Weather Prediction		5 % 10 % 20 %		2 km 10 km 40 km	30 min 2 h 6 h	15 min 30 min 2 h	Global	reasonable	2011-07-29	T Montmerle
802	O3 Total Column	TC	2.5 Atmospheric Climate Monitoring	0.5	1 % 2 % 3 % 0.5	1 % 2 % 3 % 0.5	20 km 100 km 500 km 0.5	60 min 24 h 30 d 0.5	60 min 24 h 30 d 0.5	Global	firm	2023-05-03	GCOS-245: The 2022 ECVs Requirements (GCOS-245)	Requirement for uncertainty at 2-sigma
911	O3 Total Column	TC	Atmospheric Chemistry (deprecated)		1 % 2 % 3 %		5 km 100 km	6 sec 3 sec	1 sec 30 sec	Global	speculative	2021-12-16	GAW Expert Team on Atmospheric Composition Network Design and Evolution	Other TC units: millimoles per square metre mmol/m2. One Dobson Unit (DU)=0.4462 mmol/m2 or 2.687x10^16 molecules cm-2. Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error.
912	O3 Total Column	TC	Forecasting Atmospheric Composition		1 % 5 %		5 km 100 km	6 h 24 h	60 min 3 h	Global	firm	2022-01-05	GAW Expert Team on Atmospheric Composition Network Design and Evolution	Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error.
913	O3 Total Column	TC	2.6 Atmospheric Composition Forecasting and Monitoring		1 % 3 %		5 km 100 km	6 h 3 d	24 h 30 d	Global	firm	2022-01-05	GAW Expert Team on Atmospheric Composition Network Design and Evolution	Uncertainties are provided as 2 sigma. They represent the sum of random and systematic error.