Learn More
*Correspondence: William A. Lahoz, INBY, NILU – Norwegian Institute for Air Research, Instituttveien 18, PO Box 100, Kjeller 2027, Norway e-mail: wal@nilu.no 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(More)
The data assimilation of stratospheric constituents is reviewed. Several data assimilation methods are introduced, with particular consideration to their application to stratospheric constituent measurements. Differences from meteorological data assimilation are outlined. Historically, two approaches have been used to carry out constituent assimilation. One(More)
NOAA/NWS/NCEP/EMC, Camp Springs, MD, USA, and Wyle Information Systems, El Segundo, CA, USA, Michiko.Masutani@noaa.gov NOAA/Earth System Research Laboratory, Boulder, CO, USA, Tom.Schlatter@noaa.gov NASA/GSFC, Greenbelt, MD, USA, and Goddard Earth Science and Technology Center, University of Maryland, Baltimore, MD, USA, Ronald.M.Errico@nasa.gov Royal Dutch(More)
Trends in tropospheric nitrogen dioxide (NO2) columns over 66 large urban agglomerations worldwide have been computed using data from the SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) instrument onboard the Envisat platform for the period August 2002 to March 2012. A seasonal model including a linear trend was fitted to(More)
Evaluation of linear ozone photochemistry parametrizations in a stratosphere-troposphere data assimilation system A. J. Geer, W. A. Lahoz, D. R. Jackson, D. Cariolle, and J. P. McCormack Data Assimilation Research Centre (DARC), University of Reading, Reading, UK Now at European Centre for Medium-Range Weather Forecasts (ECMWF), Reading, UK Met Office,(More)
The ASSET intercomparison of ozone analyses: method and first results A. J. Geer, W. A. Lahoz, S. Bekki, N. Bormann, Q. Errera, H. J. Eskes, D. Fonteyn, D. R. Jackson, M. N. Juckes, S. Massart, V.-H. Peuch, S. Rharmili, and A. Segers Data Assimilation Research Centre, University of Reading, Reading, UK CNRS Service Aeronomie, Université Pierre et Marie(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)
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 of O3, H2O, CH4, HNO3, N2O and NO2, in the altitude range from 12 to 68 km. In this paper we present the performances(More)
RESUME We provide first results of work toward the evaluation of Envisat data using the Met Office (UK) Numerical Weather Prediction (NWP) System. The Envisat data to be evaluated is level 2 temperature, ozone and water vapour from MIPAS and GOMOS, and level 2 total column ozone data from SCIAMACHY. Initially, we focus on the evaluation of MIPAS and(More)