Drier Mediterranean soils due to greenhouse warming bring easterly winds over summertime central Europe

被引：70

作者：

Haarsma, Reindert J. ^{[1
]}

Selten, Frank ^{[1
]}

Hurk, Bart Vd ^{[1
]}

Hazeleger, Wilco ^{[1
]}

Wang, Xueli ^{[1
]}

机构：

[1] Royal Netherlands Meteorol Inst, NL-3730 AE De Bilt, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

CLIMATE-CHANGE;

D O I：

10.1029/2008GL036617

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Western European summers become more continental in simulations for the 21st century. Anomalously large summer warming over the Mediterranean area in concert with drier soils and a reduced surface pressure can explain this change. The warming is enhanced due to soil moisture depletion which limits the cooling of the land surface by evaporation. A large-scale Mediterranean heat low develops, bringing easterly winds over Central Europe. Statistical analysis for present-day conditions indicates that the same mechanism operates on intra-seasonal timescales; dry Mediterranean soils in June are correlated with high temperature and low surface pressure in July-August. Idealized simulations confirm the relation between the surface warming of the Mediterranean area and the development of a heat low. The development of a heat low in response to dry soils induces a positive feedback: drier Mediterranean soils in summer bring easterly winds over Europe and increase the continental character of Western European summer climate. Citation: Haarsma, R. J., F. Selten, B. vd Hurk, W. Hazeleger, and X. Wang (2009), Drier Mediterranean soils due to greenhouse warming bring easterly winds over summertime central Europe, Geophys. Res. Lett., 36, L04705, doi: 10.1029/2008GL036617.

引用

页数：7

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