Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD031405 |
Spring Aleutian Low Weakening and Surface Cooling Trend in Northwest North America During Recent Decades | |
Sun, Cheng1,2; Kucharski, Fred3,4; Li, Jianping5,6; Wang, Kaicun1; Kang, In-Sik2; Lian, Tao2; Liu, Ting2; Ding, Ruiqiang7; Xie, Fei1 | |
2019-11-29 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:22页码:12078-12092 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Italy; Saudi Arabia |
英文摘要 | State-of-the-art climate models predict an enhanced warming over global land areas in response to the greenhouse gas (GHG) forcing. In nature, however, the observed land surface warming is not spatially uniform in recent decades as GHG concentration has risen rapidly. There is no warming and even cooling trend in spring northwest North America (NWNA) surface temperature since 1980. Here, we link the observed multidecadal surface cooling trend in NWNA to the weakening of spring Aleutian low (AL), which is ecologically important during the growing season. The AL weakening leads to reductions of southwesterly wind and warm air transport from eastern North Pacific to NWNA. The spring AL weakening and associated NWNA surface cooling are reasonably reproduced by AMIP models, driven by the historical external forcing and imposed sea ice concentration (SIC) and sea surface temperature (SST) from observations. Further investigations into the roles of different forcing components suggest that the changes in the AL are most likely driven by the tropical SST changes in recent decades while the external forcing and SIC play minor roles. There is a zonal dipole pattern of trends in tropical SSTs since 1980, with central-eastern Pacific cooling and warming in other tropical basins, and the atmospheric responses to this SST change show a meridionally propagating Rossby wave train from tropics into subarctic North Pacific, which mediates the SST forcing and the AL changes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000499288500001 |
WOS关键词 | SEA-ICE ; PACIFIC ; VARIABILITY ; ATMOSPHERE ; OCEAN ; CIRCULATION ; OSCILLATION ; WINTER ; MODEL ; TEMPERATURE |
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/225825 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci GCESS, Beijing, Peoples R China; 2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China; 3.Abdus Salam Int Ctr Theoret Phys, Trieste, Italy; 4.King Abdulaziz Univ, Dept Meteorol, Ctr Excellence Climate Change Res, Jeddah, Saudi Arabia; 5.Ocean Univ China, Inst Adv Ocean Studies, Key Lab Phys Oceanog, Qingdao, Shandong, Peoples R China; 6.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Shandong, Peoples R China; 7.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Cheng,Kucharski, Fred,Li, Jianping,et al. Spring Aleutian Low Weakening and Surface Cooling Trend in Northwest North America During Recent Decades[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(22):12078-12092. |
APA | Sun, Cheng.,Kucharski, Fred.,Li, Jianping.,Wang, Kaicun.,Kang, In-Sik.,...&Xie, Fei.(2019).Spring Aleutian Low Weakening and Surface Cooling Trend in Northwest North America During Recent Decades.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(22),12078-12092. |
MLA | Sun, Cheng,et al."Spring Aleutian Low Weakening and Surface Cooling Trend in Northwest North America During Recent Decades".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.22(2019):12078-12092. |
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