DOI: 10.1038/ngeo2141
论文题名: Mega-heatwave temperatures due to combined soil desiccation and atmospheric heat accumulation
作者: Miralles D.G. ; Teuling A.J. ; Van Heerwaarden C.C. ; De Arellano J.V.-G.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 5 起始页码: 345
结束页码: 349
语种: 英语
Scopus关键词: air temperature
; atmospheric pressure
; boundary layer
; climate modeling
; heat flow
; land surface
; satellite imagery
; Europe
英文摘要: The recent European mega-heatwaves of 2003 and 2010 broke temperature records across Europe. Although events of this magnitude were unprecedented from a historical perspective, they are expected to become common by the end of the century. However, our understanding of extreme heatwave events is limited and their representation in climate models remains imperfect. Here we investigate the physical processes underlying recent mega-heatwaves using satellite and balloon measurements of land and atmospheric conditions from the summers of 2003 in France and 2010 in Russia, in combination with a soil-water-atmosphere model. We find that, in both events, persistent atmospheric pressure patterns induced land-atmosphere feedbacks that led to extreme temperatures. During daytime, heat was supplied by large-scale horizontal advection, warming of an increasingly desiccated land surface and enhanced entrainment of warm air into the atmospheric boundary layer. Overnight, the heat generated during the day was preserved in an anomalous kilometres-deep atmospheric layer located several hundred metres above the surface, available to re-enter the atmospheric boundary layer during the next diurnal cycle. This resulted in a progressive accumulation of heat over several days, which enhanced soil desiccation and led to further escalation in air temperatures. Our findings suggest that the extreme temperatures in mega-heatwaves can be explained by the combined multi-day memory of the land surface and the atmospheric boundary layer. © 2014 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106507
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, United Kingdom; Laboratory of Hydrology and Water Management, Ghent University, B-9000 Ghent, Belgium; Hydrology and Quantitative Water Management Group, Wageningen University, 6709PA Wageningen, Netherlands; Max Planck Institute for Meteorology, 20146 Hamburg, Germany; Meteorology and Air Quality Section, Wageningen University, 6709PA Wageningen, Netherlands
Recommended Citation:
Miralles D.G.,Teuling A.J.,Van Heerwaarden C.C.,et al. Mega-heatwave temperatures due to combined soil desiccation and atmospheric heat accumulation[J]. Nature Geoscience,2014-01-01,7(5)