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DOI | 10.1175/JCLI-D-17-0270.1 |
Impacts of the Atlantic Multidecadal Variability on North American Summer Climate and Heat Waves | |
Ruprich-Robert, Yohan1,2,3; Delworth, Thomas2; Msadek, Rym4; Castruccio, Frederic5; Yeager, Stephen5; Danabasoglu, Gokhan5 | |
2018-05-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:9页码:3679-3700 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Spain; France |
英文摘要 | The impacts of the Atlantic multidecadal variability (AMV) on summertime North American climate are investigated using three coupled global climate models (CGCMs) in which North Atlantic sea surface temperatures (SSTs) are restored to observed AMV anomalies. Large ensemble simulations are performed to estimate how AMV can modulate the occurrence of extreme weather such as heat waves. It is shown that, in response to an AMV warming, all models simulate a precipitation deficit and a warming over northern Mexico and the southern United States that lead to an increased number of heat wave days by about 30% compared to an AMV cooling. The physical mechanisms associated with these impacts are discussed. The positive tropical Atlantic SST anomalies associated with the warm AMV drive a Matsuno-Gill-like atmospheric response that favors subsidence over northern Mexico and the southern United States. This leads to a warming of the whole tropospheric column, and to a decrease in relative humidity, cloud cover, and precipitation. Soil moisture response to AMV also plays a role in the modulation of heat wave occurrence. An AMV warming favors dry soil conditions over northern Mexico and the southern United States by driving a year-round precipitation deficit through atmospheric teleconnections coming both directly from the North Atlantic SST forcing and indirectly from the Pacific. The indirect AMV teleconnections highlight the importance of using CGCMs to fully assess the AMV impacts on North America. Given the potential predictability of the AMV, the teleconnections discussed here suggest a source of predictability for the North American climate variability and in particular for the occurrence of heat waves at multiyear time scales. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429529900019 |
WOS关键词 | UNITED-STATES ; SOIL-MOISTURE ; SURFACE-TEMPERATURE ; ATMOSPHERE INTERACTIONS ; 1988 DROUGHT ; PRECIPITATION ; OSCILLATION ; PACIFIC ; MODELS ; OCEAN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20320 |
专题 | 气候变化 |
作者单位 | 1.Princeton Univ, Atmosphere & Ocean Sci, Princeton, NJ 08544 USA; 2.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA; 3.Barcelona Supercomp Ctr, Barcelona, Spain; 4.CNRS, CERFACS, CECI, UMR 5318, Toulouse, France; 5.Natl Ctr Atmospher Res, Global & Climate Dynam, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Ruprich-Robert, Yohan,Delworth, Thomas,Msadek, Rym,et al. Impacts of the Atlantic Multidecadal Variability on North American Summer Climate and Heat Waves[J]. JOURNAL OF CLIMATE,2018,31(9):3679-3700. |
APA | Ruprich-Robert, Yohan,Delworth, Thomas,Msadek, Rym,Castruccio, Frederic,Yeager, Stephen,&Danabasoglu, Gokhan.(2018).Impacts of the Atlantic Multidecadal Variability on North American Summer Climate and Heat Waves.JOURNAL OF CLIMATE,31(9),3679-3700. |
MLA | Ruprich-Robert, Yohan,et al."Impacts of the Atlantic Multidecadal Variability on North American Summer Climate and Heat Waves".JOURNAL OF CLIMATE 31.9(2018):3679-3700. |
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