气候变化领域集成服务门户(CCPortal): Impacts of Variations in Caspian Sea Surface Area on Catchment-Scale and Large-Scale Climate

CCPortal

DOI	10.1029/2020JD034251
	Impacts of Variations in Caspian Sea Surface Area on Catchment-Scale and Large-Scale Climate
	Koriche S.A.; Nandini-Weiss S.D.; Prange M.; Singarayer J.S.; Arpe K.; Cloke H.L.; Schulz M.; Bakker P.; Leroy S.A.G.; Coe M.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	The Caspian Sea (CS) is the largest inland lake in the world. Large variations in sea level and surface area occurred in the past and are projected for the future. The potential impacts on regional and large-scale hydroclimate are not well understood. Here, we examine the impact of CS area on climate within its catchment and across the northern hemisphere, for the first time with a fully coupled climate model. The Community Earth System Model (CESM1.2.2) is used to simulate the climate of four scenarios: (a) larger than present CS area, (b) current area, (c) smaller than present area, and (d) no-CS scenario. The results reveal large changes in the regional atmospheric water budget. Evaporation (e) over the sea increases with increasing area, while precipitation (P) increases over the south-west CS with increasing area. P-E over the CS catchment decreases as CS surface area increases, indicating a dominant negative lake-evaporation feedback. A larger CS reduces summer surface air temperatures and increases winter temperatures. The impacts extend eastwards, where summer precipitation is enhanced over central Asia and the north-western Pacific experiences warming with reduced winter sea ice. Our results also indicate weakening of the 500-hPa troughs over the northern Pacific with larger CS area. We find a thermal response triggers a southward shift of the upper troposphere jet stream during summer. Our findings establish that changing CS area results in climate impacts of such scope that CS area variations should be incorporated into climate model simulations, including palaeo and future scenarios. © 2021. The Authors.
英文关键词	Caspian Sea; CESM1.2.2 model; evaporation; precipitation; subtropical jet
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237004
作者单位	Department of Meteorology, University of Reading, Reading, United Kingdom; School of Civil and Environmental Engineering, JiT, Jimma University, Jimma, Oromiyaa, Ethiopia; Department of Geoscience, Baylor University, Waco, TX, United States; Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, United States; MARUM – Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Institute of Oceanography, Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany; Max-Planck-Institute for Meteorology, Hamburg, Germany; Department of Geography and Environmental Science, University of Reading, Reading, United Kingdom; Department of Earth Sciences, Uppsala University, Uppsala, Sweden; Centre of Natural Hazards and Disaster Science, CNDS, Uppsala, Sweden; Department of Earth Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Aix Marseille University, CNRS, Aix-en-Provence, France; School of Environmental Sciences, U...
推荐引用方式 GB/T 7714	Koriche S.A.,Nandini-Weiss S.D.,Prange M.,et al. Impacts of Variations in Caspian Sea Surface Area on Catchment-Scale and Large-Scale Climate[J],2021,126(18).
APA	Koriche S.A..,Nandini-Weiss S.D..,Prange M..,Singarayer J.S..,Arpe K..,...&Coe M..(2021).Impacts of Variations in Caspian Sea Surface Area on Catchment-Scale and Large-Scale Climate.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Koriche S.A.,et al."Impacts of Variations in Caspian Sea Surface Area on Catchment-Scale and Large-Scale Climate".Journal of Geophysical Research: Atmospheres 126.18(2021).