DOI: 10.1175/JCLI-D-16-0068.1
Scopus记录号: 2-s2.0-85020089633
论文题名: The role of soil moisture-atmosphere interaction on future hot spells over North America as simulated by the Canadian Regional Climate Model (CRCM5)
作者: Diro G.T. ; Sushama L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 13 起始页码: 5041
结束页码: 5058
语种: 英语
英文摘要: Soil moisture-atmosphere interactions play a key role in modulating climate variability and extremes. This study investigates how soil moisture-atmosphere coupling may affect future extreme events, particularly the role of projected soil moisture in modulating the frequency and maximum duration of hot spells over North America, using the fifth-generation Canadian Regional Climate Model (CRCM5). With this objective, CRCM5 simulations, driven by two coupled general circulation models (MPI-ESM and CanESM2), are performed with and without soil moisture-atmosphere interactions for current (1981-2010) and future (2071-2100) climates over North America, for representative concentration pathways (RCPs) 4.5 and 8.5. Analysis indicates that, in future climate, the soil moisture-temperature coupling regions, located over the Great Plains in the current climate, will expand farther north, including large parts of central Canada. Results also indicate that soil moisture-atmosphere interactions will play an important role in modulating temperature extremes in the future by contributing more than 50% to the projected increase in hot-spell days over the southern Great Plains and parts of central Canada, especially for the RCP4.5 scenario. This higher contribution of soil moisture-atmosphere interactions to the future increases in hot-spell days for RCP4.5 is related to the fact that the projected decrease in soil moisture caused the soil to remain in a transitional regime between wet and dry state that is conducive to soil moisture-atmosphere coupling. For the RCP8.5 scenario, on the other hand, the future projected soil state over the southern United States and northern Mexico is too dry to have an impact on evapotranspiration and therefore on temperature. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48866
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Centre pour l'étude et la Simulation du Climat à l'échelle Régionale, University of Québec at Montréal, Montréal, QC, Canada
Recommended Citation:
Diro G.T.,Sushama L.. The role of soil moisture-atmosphere interaction on future hot spells over North America as simulated by the Canadian Regional Climate Model (CRCM5)[J]. Journal of Climate,2017-01-01,30(13)