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DOI | 10.1002/joc.6235 |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia | |
Li, Jingyi1; Li, Fei1,2; He, Shengping3; Wang, Huijun1,4,5; Orsolini, Yvan J.2 | |
2019-08-09 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; Norway |
英文摘要 | The impact of North American (NA) snow cover on the Northern Hemisphere climate has drawn increasing attention in recent years. This study reveals a negative relationship between NA snow cover in December and surface air temperature (SAT) over the midlatitude Asia in the following January. The results show that, in December, the extensive snow cover decreases SAT over NA via local diabatic cooling, which further intensifies the Atlantic jet stream by enlarging the meridional gradient of the 1,000- to 300-hPa layer thickness, especially along 40 degrees N. Meanwhile, we found negative sea surface temperature (SST) anomalies over the Western North Atlantic and enhanced transient eddy activity over the Eastern North Atlantic due to anomalous net energy conversion from the mean flow. In January, a zonally oriented dipole of transient eddy anomalies straddles the North Atlantic, with the negative-positive (west-east) anomaly centres attributing to local oceanic cooling and the persistence of the eddy-mean flow interaction, respectively. Such dipole of transient eddy activity in turn favours the downstream development of the Atlantic jet stream. Besides, the changes in surface turbulent heat flux over the North Atlantic trigger a Rossby wave train that propagates across Europe and towards the Far East. Coincident with the strengthened Siberian High and the accelerated East Asian jet stream in January, SAT decreases over the midlatitude Asia. Hence, our analysis indicates that December NA snow cover could potentially be exploited for subseasonal predictability over Asia. |
英文关键词 | eddy-mean flow interaction midlatitude Asia surface air temperature North American snow cover Rossby wave train |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481030100001 |
WOS关键词 | ARCTIC SEA-ICE ; WINTER MONSOON ; LARGE-ENSEMBLE ; CLIMATE ; HEMISPHERE ; VARIABILITY ; IMPACTS ; LINKAGE ; EDDIES ; JET |
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/185942 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster, Minist Educ, Ningliu 219 St, Nanjing 210000, Jiangsu, Peoples R China; 2.NILU Norwegian Inst Air Res, Kjeller, Norway; 3.Univ Bergen, Geophys Inst, Bergen, Norway; 4.Chinese Acad Sci, Climate Change Res Ctr, Beijing, Peoples R China; 5.Chinese Acad Sci, Nansen Thu Int Res Ctr, Inst Atmospher Phys, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Jingyi,Li, Fei,He, Shengping,et al. Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019. |
APA | Li, Jingyi,Li, Fei,He, Shengping,Wang, Huijun,&Orsolini, Yvan J..(2019).Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia.INTERNATIONAL JOURNAL OF CLIMATOLOGY. |
MLA | Li, Jingyi,et al."Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia".INTERNATIONAL JOURNAL OF CLIMATOLOGY (2019). |
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