Pregled bibliografske jedinice broj: 468388
Diagnostic and model sensitivity study of the 1988 U.S. drought
Diagnostic and model sensitivity study of the 1988 U.S. drought // The 1988 United States drought / Mike Fennessy, Jim Kinter, Anandu Vernekar (ur.).
College Park (MD): Department of Meteorology, University of Maryland, 1992. str. 110-128 (pozvano predavanje, nije recenziran, cjeloviti rad (in extenso), znanstveni)
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Naslov
Diagnostic and model sensitivity study of the 1988 U.S. drought
Autori
Branković, Č. ; Palmer, T.N. ; Viterbo, P.
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
The 1988 United States drought
/ Mike Fennessy, Jim Kinter, Anandu Vernekar - College Park (MD) : Department of Meteorology, University of Maryland, 1992, 110-128
Skup
The 1988 United States drought
Mjesto i datum
College Park (MD), Sjedinjene Američke Države, 30.04.1990. - 02.05.1990
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
drought prediction; seasonal integrations; ECMWF model
Sažetak
Some aspects of the large-scale flow related to the drought over the continental US in summer 1988 have been studied. On the basis of ECMWF operational analysis and first-guess data we try to identify processes important for drought. Strong upper-air ridging associated with intensive subsidence displaces rain-producing systems northward and inhibited the low-level moisture flux penetration from the Gulf of Mexico deep into the N. American continent. The dry atmospheric conditions caused the reduction in soil moisture content that in turn was unfavorable for the development of convective systems. The 90-day experiments with ECMWF model with both observed and climatological SSTs indicate that the late spring and summer SST anomalies and La Nina in particular played an important role in establishing a strong ridge over N. America. The maintenance of the ridge however must be viewed in interaction with summer land surface processes, especially with soil moisture forcing which has strong impact on model integration. The revised model formulation which included the enhanced evaporation for low wind speeds seems to be the crucial factor that influenced the model's ability to handle SST anomalies more correctly. More experimentation is needed to clarify the role of initial conditions on the onset of the drought.
Izvorni jezik
Engleski
Znanstvena područja
Geologija
