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Tropical stratospheric water vapor measured by the microwave limb sounder (M 1.S), " Geophys. Comparison of C1O measurements made by airborne and spaceborne microwave radiometers in the arctic winter stratosphere 1993, " Geophys. Correlated ollservations of HC1 and C1ONO2 from UARS and implications for stratospheric chlorine partitioning, " Geophys. Res.(More)
This paper discusses the global analyses of stratospheric ozone (O 3) and nitrogen dioxide (NO 2) obtained by the Belgian Assimilation System for Chemical Observations from Envisat (BASCOE). Based on a chemistry transport model (CTM) and the 4-dimensional variational (4D-Var) method, BASCOE has assimilated chemical obser-Our analyses are evaluated against(More)
This paper examines 11 sets of ozone analyses from 7 different data assimilation systems. Two are numerical weather prediction (NWP) systems based on general circulation models (GCMs); the other five use chemistry transport models (CTMs). These systems contain either linearised or detailed ozone chemistry, or no chemistry at all. 5 In most analyses, MIPAS(More)
Outline • OSSE general definition • OSSE objectives • OSSE " rules " • OSSE framework – Nature Run – Realism check – Simulated observations – Validation/calibration (OSEs) – Forecasting experiments – Impact assessment (impact metrics) • Examples – NCEP adaptive targeting OSSEs for Doppler Wind Lidar – GSFC hurricane forecasting OSSEs for Doppler Wind Lidar(More)
Climate change, air quality, and environmental degradation are important societal challenges for the Twenty-first Century. These challenges require an intelligent response from society, which in turn requires access to information about the Earth System. This information comes from observations and prior knowledge, the latter typically embodied in a model(More)
(b) ISAC-CNR, via Gobetti 101 – 40129 Bologna (Italy) (c) IFAC-CNR, via Panciatichi 64 – 50127 Firenze (Italy) ABSTRACT The retrieval code developed for the Level 2 analysis of MIPAS data contains several optimisations aimed to provide, in near real time and in an automated way, atmospheric vertical profiles of temperature, pressure and volume mixing ratios(More)
/RESUME At the 2 nd Workshop of the Atmospheric Chemistry Validation of Envisat (ACVE-2), reprocessed water vapour data from MIPAS (V 4.61) were evaluated using data assimilation models. The following groups participated: (i) the Data Assimilation Research Centre in collaboration with the Met Office, both UK; (ii) the European Centre for Medium-range(More)