DOI: 10.1007/s00382-017-3759-x
Scopus记录号: 2-s2.0-85020497974
论文题名: Western US high June 2015 temperatures and their relation to global warming and soil moisture
作者: Philip S.Y. ; Kew S.F. ; Hauser M. ; Guillod B.P. ; Teuling A.J. ; Whan K. ; Uhe P. ; Oldenborgh G.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-07-08 起始页码: 2587
结束页码: 2601
语种: 英语
英文关键词: Global warming
; Land attribution
; Soil moisture
; Surface–atmosphere coupling
; Temperature extremes
; US West Coast states
; VAC-metric
; π-metric
英文摘要: The Western US states Washington (WA), Oregon (OR) and California (CA) experienced extremely high temperatures in June 2015. The temperature anomalies were so extreme that they cannot be explained with global warming alone. We investigate the hypothesis that soil moisture played an important role as well. We use a land surface model and a large ensemble from the weather@home modelling effort to investigate the coupling between soil moisture and temperature in a warming world. Both models show that May was anomalously dry, satisfying a prerequisite for the extreme heat wave, and they indicate that WA and OR are in a wet-to-dry transitional soil moisture regime. We use two different land surface–atmosphere coupling metrics to show that there was strong coupling between temperature, latent heat flux and the effect of soil moisture deficits on the energy balance in June 2015 in WA and OR. June temperature anomalies conditioned on wet/dry conditions show that both the mean and extreme temperatures become hotter for dry soils, especially in WA and OR. Fitting a Gaussian model to temperatures using soil moisture as a covariate shows that the June 2015 temperature values fit well in the extrapolated empirical temperature/drought lines. The high temperature anomalies in WA and OR are thus to be expected, given the dry soil moisture conditions and that those regions are in the transition from a wet to a dry regime. CA is already in the dry regime and therefore the necessity of taking soil moisture into account is of lower importance. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109365
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Royal Netherlands Meteorological Institute (KNMI), De Bilt, Netherlands; ETH Zürich, Zürich, Switzerland; Environmental Change Institute, University of Oxford, Oxford, United Kingdom; Oxford e-Research Centre, University of Oxford, Oxford, United Kingdom; Hydrology and Quantitative Water Management Group, Wageningen University, Wageningen, Netherlands
Recommended Citation:
Philip S.Y.,Kew S.F.,Hauser M.,et al. Western US high June 2015 temperatures and their relation to global warming and soil moisture[J]. Climate Dynamics,2018-01-01,50(2018-07-08)