Naslov
Doppler wind lidar measurements scenarios in the tropics

Autori
Žagar, Nedjeljka, Stoffelen, Ad ; Marseille, Gert-Jan ; Accadia, Christophe ; Schlüssel, Peter

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the Joint 2007 EUMETSAT Meteorological Satellite Conference and the 15th Satellite Meteorology & Oceanography Conference of the American Meteorological Society / - , 2007

ISBN
92-9110-079-X

Skup
Joint 2007 EUMETSAT Meteorological Satellite Conference and the 15th Satellite Meteorology & Oceanography Conference of the American Meteorological Society

Mjesto i datum
Amsterdam, Nizozemska, 24.09.2007. - 28.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
atmospheric dynamics; background-error covariances; data assimilation; ECMWF

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

Napomena
Nedjeljka Žagar (rođ. Brzović) vodi se u evidenciji znanstvenika MZOŠ-a pod brojem 221165.

POVEZANOST RADA