Tropospheric NO<sub>2</sub> columns: a comparison between model and retrieved data from GOME measurements - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Atmospheric Chemistry and Physics Année : 2002

Tropospheric NO2 columns: a comparison between model and retrieved data from GOME measurements

Résumé

Tropospheric NO2 plays a variety of significant roles in atmospheric chemistry. In the troposphere it is one of the most significant precursors of photochemical ozone (O3) production and nitric acid (HNO3). In this study tropospheric NO2 columns were calculated by the fully coupled chemistry-climate model ECHAM4.L39(DLR)/CHEM. These have been compared with tropospheric NO2 columns, retrieved using the tropospheric excess method from measurements by the Global Ozone Monitoring Experiment (GOME) of up-welling earthshine radiance and the extraterrestrial irradiance. GOME is part of the core payload of the second European Research Satellite (ERS-2). For this study the first five years of GOME measurements have been used. The period of five years of observational data is sufficiently long to facilitate for the first time a comparison based on climatological averages with global coverage, focussing on the geographical distribution of the tropospheric NO2.

A new approach of analysing regional differences (i.e. on continental scales) by calculating individual averages for different environments provides more detailed information about specific NOx sources and of their seasonal variations. The results obtained enable the validity of the model NO2 source distribution and the assumptions used to separate tropospheric and stratospheric parts of the NO2 column amount from the satellite measurements to be investigated.
Fichier principal
Vignette du fichier
acp-2-67-2002.pdf (945.51 Ko) Télécharger le fichier
Origine : Accord explicite pour ce dépôt
Loading...

Dates et versions

hal-00295186 , version 1 (18-06-2008)

Identifiants

  • HAL Id : hal-00295186 , version 1

Citer

A. Lauer, M. Dameris, A. Richter, J. P. Burrows. Tropospheric NO2 columns: a comparison between model and retrieved data from GOME measurements. Atmospheric Chemistry and Physics, 2002, 2 (1), pp.67-78. ⟨hal-00295186⟩

Collections

INSU EGU
78 Consultations
429 Téléchargements

Partager

Gmail Facebook X LinkedIn More