wp_no=4403
wp_name=Quality assurance of GOME-2 trace gas products (NO2, BrO, SO2, HCHO, CHOCHO)
list_of_product_IDs=O3M-02,O3M-07,O3M-36,O3M-37,O3M-50,O3M-51,O3M-52,O3M-53
wp_start=02/2017
wp_end=12/2021
wp_responsible=BIRA
no_of_participants=2
BIRA 2 2 2 2 2 0 10000
AUTH 2 2 2 1 1 0 5000

wp_objectives:
The objective of this WP is the continuous quality assurance of the O3M SAF GOME-2 trace gases (NO2, BrO, SO2, HCHO, CHOCHO column products).

wp_methodology:
Quality Assurance (QA) consists in the regular monitoring of the evolution of the data, in comparison to operationally available correlative data sets. 
Results from this data confrontation are dynamically displayed on the validation web portal (http://cdop.aeronomie.be).

QA tasks for NO2:
- (BIRA) Collect, process and evaluate NRT data records of stratospheric NO2 column from the NDACC/UV-visible network
- (BIRA) Collect, process and evaluate NRT data records of tropospheric NO2 column from independent satellite sensors 
- (BIRA) Collect, process and evaluate NRT tropospheric NO2 column data from BIRA MAXDOAS instruments at O.H.P., Xianghe, Uccle and Bujumbura
- (BIRA) Monitor on a regular and automated basis the G2A, G2B and G2C NO2 data records by comparison to correlative ground-based and satellite NRT data sets 
- (AUTH) Collect, process and evaluate NRT NO2 column data from ground-based MaxDOAS instruments at Thessaloniki (Greece) and Guangzhu (China)

QA tasks for BrO: 
- (BIRA) Collect, process and evaluate BrO column data in Harestua and possibly other BIRA stations
- (BIRA) Analyse consistency between GOME-2/Metop-A/B/C BrO columns through comparison to the reference climatological values in different regions of the world for the online comparisons on the website

QA tasks for SO2: 
- (BIRA) Collect, process and evaluate SO2 column data in Xianghe
- (AUTH and BIRA) Analyse consistency between G2A, G2B and G2C SO2 columns through comparison to the reference climatological values in different 
  regions of the world for the online comparisons on the website

QA tasks for HCHO: 
- (BIRA) Collect, process and evaluate HCHO from ground-based BIRA-IASB measurements in Xianghe, Bujumbura, OHP and Reunion Island
- (BIRA) Analyse consistency between G2A, G2B and G2C HCHO columns through comparison to the reference climatological values in different 
  regions of the world for the online comparisons on the website
- (BIRA) Monitor on a regular and automated basis the G2A, G2B and G2C HCHO data records by comparison to correlative ground-based data
- (AUTH) Collect, process and evaluate NRT HCHO column data from ground-based MaxDOAS instruments at Thessaloniki (Greece) and Guangzhu (China)

QA tasks for CHOCHO: 
- (BIRA) Collect, process and evaluate CHOCHO data sets in Xianghe, Bujumbura and Reunion Island
- (BIRA) Monitor on a regular and automated basis the G2A, G2B and G2C CHOCHO data records by comparison to correlative ground-based measurements and satellite reference climatological values  

wp_datasources:
- GOME-2/Metop-A/B/C level 2 total NO2, BrO, SO2, HCHO, CHOCHO data processed by DLR
- GOME-2/Metop-A/B/C level 2 tropospheric NO2 and BrO data processed by DLR  
- IASI/Metop-A/B/C level 2 total SO2 data
- SCIAMACHY, OMI level-3 trace gases data.
- Ground-based DOAS total NO2, BrO and OClO column data from NDACC network
- Ground-based MAXDOAS tropospheric NO2, BrO, HCHO, CHOCHO, SO2 column data

wp_deliverables:
- QA reports on GOME-2 satellite trace gases column products, as input for Operation Reports
- QA monitoring on BIRA-hosted web portal with link to the O3M SAF validation website

End