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AMASDU

Aerosol Mapping Algorithms for Satellite Data Users

Development of 4-dimensional products related to global mapping of aerosols, with improvements to data assimilation models, using a 4D variational data assimilation method.

AMASDU
Aerosol Mapping Algorithms for Satellite Data Users
DUP (Data User Programme)
Land
€220K
Service Demonstration
Completed
CRISTA 1 : CRISTA-SPAS
ERS-2 : GOME

The objective of the AMASDU project was the development of 4D products related to global mapping of aerosols, with improvements to data assimilation models.

The approach followed for the production of these global aerosol maps was a 4D variational data assimilation method, complementary to the low-level cartography approach experimented during the DUP DAMS2P project (Development of Global Aerosol Mapping from Satellites level-2 Products). The 4D variational data assimilation method is based on a numerical atmosphere model that propagates the aerosol particles in a dynamically consistent way. The model dynamics are based on ECMWF wind analyses.

The implementation was based on different modules:

  • the atmospheric model describing the evolution of the atmosphere's state forward in time. It includes a choice of dynamics, photo-chemistry, and aerosol microphysics modules, according to the assimilation needs
  • the adjoint model, including techniques for automatic differentiation of the atmosphere model. When calculated backwards in time, it gives the gradient of the discrepancy between model calculated values and observations with respect to the initial state conditions.
  • an optimization (iteration) module, tuned for large-scale problems, which minimizes the discrepancy between calculated and observed values.
Scientific paper in JGR, JUNE 16, 2001
Project final report (4.5Mb Pdf file)
UPSDAM final report (Project extension, 1Mb Pdf file)
Belgian Institute for Space Aeronomy
CNRS : Centre National de la Recherche Scientifique
Martine De Maziere
Head of Section Physico-Chemistry of the Ionosphere of Department Therorical Aeronomy
BIRA-IASB
Ringlaan-3-Avenue Circulaire
B-1180 Brussels
BELGIUM
Tel: +32 (0)2-373.03.63
Fax: +32 (0)2-374.84.23
Email: Martine.DeMaziere@aeronomie.be
Claus Zehner
European Space Agency - ESRIN D/EOP-SEU
Via Galileo Galilei CP. 64
I-00044 Frascati
ITALY
Tel: +39 06-941.80544
Fax: +39 06-941.80552
Email: claus.zehner@esa.int