DOI: 10.1175/JCLI-D-16-0808.1
Scopus记录号: 2-s2.0-85022331052
论文题名: Super-Clausius-Clapeyron scaling of extreme hourly convective precipitation and its relation to large-scale atmospheric conditions
作者: Lenderink G. ; Barbero R. ; Loriaux J.M. ; Fowler H.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 15 起始页码: 6037
结束页码: 6052
语种: 英语
Scopus关键词: Atmospheric humidity
; Climate change
; Heat convection
; Precipitation (chemical)
; Atmospheric conditions
; Convective precipitation
; Extreme events
; Precipitation extremes
; Precipitation measurement
; Precipitation temperature
; Reanalysis
; Surface observation
; Atmospheric temperature
英文摘要: Present-day precipitation-temperature scaling relations indicate that hourly precipitation extremes may have a response to warming exceeding the Clausius-Clapeyron (CC) relation; for the Netherlands the dependency on surface dewpoint temperature follows 2 times the CC relation (2CC). The authors' hypothesis- as supported by a simple physical argument presented here-is that this 2CC behavior arises from the physics of convective clouds. To further investigate this, the large-scale atmospheric conditions accompanying summertime afternoon precipitation events are analyzed using surface observations combined with a regional reanalysis. Events are precipitation measurements clustered in time and space. The hourly peak intensities of these events again reveal a 2CC scaling with the surface dewpoint temperature. The temperature excess of moist updrafts initialized at the surface and the maximumcloud depth are clear functions of surface dewpoint, confirming the key role of surface humidity on convective activity. Almost no differences in relative humidity and the dry temperature lapse rate were found across the dewpoint temperature range, supporting the theory that 2CC scaling is mainly due to the response of convection to increases in near-surface humidity, while other atmospheric conditions remain similar. Additionally, hourly precipitation extremes are on average accompanied by substantial large-scale upward motions and therefore large-scale moisture convergence, which appears to accelerate with surface dewpoint. Consequently, most hourly extremes occur in precipitation events with considerable spatial extent. Importantly, this event size appears to increase rapidly at the highest dewpoint temperature range, suggesting potentially strong impacts of climatic warming. © 2017 American Meteorological Society. 资助项目: ERC, European Research Council
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48770
Appears in Collections: 气候减缓与适应 气候变化与战略
There are no files associated with this item.
作者单位: Royal Netherlands Meteorological Institute, De Bilt, Netherlands; School of Civil Engineering and Geosciences, Newcastle University, Newcastle-upon-Tyne, United Kingdom; Environmental Science Department, Radboud University, Nijmegen, Netherlands
Recommended Citation:
Lenderink G.,Barbero R.,Loriaux J.M.,et al. Super-Clausius-Clapeyron scaling of extreme hourly convective precipitation and its relation to large-scale atmospheric conditions[J]. Journal of Climate,2017-01-01,30(15)