wp_no=4005 
wp_name=Validation of GOME-2 HCHO column
list_of_product_IDs=O3M-10,O3M-58,O3M-176,O3M-177
wp_start=02/2017
wp_end=12/2021
wp_responsible=BIRA
no_of_participants=3
BIRA 1 2 1 0 0 0 10000
RMI 1 1 1 0.5 0.5 0.25 11000
AUTH 1 1 1 0 0 0 5000

wp_objectives:
The objective of the WP is the set up of the validation of the ACM SAF HCHO total column product.

wp_methodology:
Validation (VAL) consists in a full investigation of the geophysical coherence of the data and of its quality. Validation exercises are required to assess new products or in case of major algorithmic revision. They make full use of all existing correlative data and lead to the production of a comprehensive validation report.

VAL tasks:
- (BIRA) verification of the geophysical coherence of the GOME-2/Metop-A/B/C HCHO total columns
- (BIRA) collect, process and evaluate HCHO from ground-based BIRA-IASB measurements in Xianghe (China), Bujumbura (Burundi), Uccle (Belgium), OHP (France) and Reunion Island
- (BIRA) collect, process and evaluate FTIR measurements at Reunion Island and Porto Velho (Brazil)
- (BIRA) comparisons against ground-based MAXDOAS measurements in Xianghe, Bujumbura, OHP and Reunion Island
- (BIRA) comparisons with FTIR measurements at Reunion Island and Porto Velho (Brazil)
- (AUTH) collect, process and evaluate HCHO colum data from ground-based MAXDOAS instruments at Thessaloniki (Greece) and Guangzhu (China)
- (AUTH) comparisons against ground-based MAXDOAS measurements in Thessaloniki (Greece) and Guangzhu (China)
- (RMI) By means of a chemical transport model, build a reference dataset on tropospheric HCHO data. The modelling domain will be three-folded: 2 coarse resolution domains for Asia (as a function of the observational network) and the current European domain, while for Belgium, a high-resolution (7 km) model domain including the BENELUX can be provided. 

wp_datasources:
- GOME-2/Metop-A/B/C HCHO total column data processed by DLR
- HCHO column and profile data from MAXDOAS instrument operated in Xianghe, Bujumbura, Uccle, OHP and Reunion Island archived and quality-controlled at BIRA
- HCHO FTIR data from selected NDACC IR stations, archived at NOAA
- Total HCHO data measured at Thessaloniki (Greece) and Guangzhu (China) by ground-based MAXDOAS UV-visible spectrometers
- Modelled HCHO data from the CHIMERE model

wp_deliverables:
- GOME-2/Metop-C HCHO Validation Report

End