Doppler wind lidar measurements scenarios in the tropics (CROSBI ID 537698)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Žagar, Nedjeljka, Stoffelen, Ad ; Marseille, Gert-Jan ; Accadia, Christophe ; Schlüssel, Peter
engleski
Doppler wind lidar measurements scenarios in the tropics
This study compares dynamical aspects of the assimilation of space-borne wind observations from several scenarios with two Doppler wind lidars (DWL) in space. The impact is measured with respect to ADM-Aeolus, a DWL satellite built by the European Space Agency with launch scheduled for 2009. In particular, the role of the background-error covariances in the tropics is studied in the context of “ identical twin” observing system simulation experiments. The assimilation model describes the horizontal structure of potential temperature and wind fields in regions of deep tropical convection. The background-error covariances are derived from the tropical forecast errors of the ECMWF model. The difficulty with making use of balance relationships in tropical three-dimensional variational assimilation is illustrated. Results show that for large-scale tropical conditions and using reliable background-error statistics, differences among various scenarios are not large. As the background-error covariances becomes less reliable, horizontal scales become smaller and the flow becomes less zonal, importance of observing information on the wind vector increases.
atmospheric dynamics; background-error covariances; data assimilation; ECMWF
Nedjeljka Žagar (rođ. Brzović) vodi se u evidenciji znanstvenika MZOŠ-a pod brojem 221165.
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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Podaci o prilogu
2007.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of the Joint 2007 EUMETSAT Meteorological Satellite Conference and the 15th Satellite Meteorology & Oceanography Conference of the American Meteorological Society
92-9110-079-X
1011-3932
Podaci o skupu
Joint 2007 EUMETSAT Meteorological Satellite Conference and the 15th Satellite Meteorology & Oceanography Conference of the American Meteorological Society
predavanje
24.09.2007-28.09.2007
Amsterdam, Nizozemska