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DOI | 10.1175/JCLI-D-18-0804.1 |
Month-to-Month Variability of Winter Temperature over Northeast China Linked to Sea Ice over the Davis Strait-Baffin Bay and the Barents-Kara Sea | |
Dai, Haixia1,2; Fan, Ke1,2; Liu, Jiping3 | |
2019-10-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:19页码:6365-6384 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | This study focuses on the month-to-month variability of winter temperature anomalies over Northeast China (NECTA), especially the out-of-phase change between December and January-February (colder than normal in December and warmer than normal in January-February, and vice versa), which accounts for 30% of the past 37 years (1980-2016). Our analysis shows that the variability of sea ice concentration (SIC) in the preceding November over the Davis Strait-Baffin Bay (SIC_DSBB) mainly affects NECTA in December, whereas the SIC over the Barents-Kara Sea (SIC_BKS) significantly impacts NECTA in January-February. A possible reason for the different effects of SIC_DSBB and SIC_BKS on NECTA is that the month-to-month increments (here called DM) of SIC over these two areas between October and November are different. A smaller DM of SIC_DSBB in November can generate eastward-propagating Rossby waves toward East Asia, whereas a larger DM of SIC_BKS can affect upward-propagating stationary Rossby waves toward the stratosphere in November. Less than normal SIC_DSBB in November corresponds to a negative phase of the sea surface temperature tripole pattern over the North Atlantic, which contributes to a negative phase of the North Atlantic Oscillation (NAO)-like geopotential height anomalies via the eddy-feedback mechanism, ultimately favoring cold conditions over Northeast China. However, positive November SIC_BKS anomalies can suppress upward-propagating Rossby waves that originate from the troposphere in November, strengthening the stratospheric polar vortex and leading to a positive phase of an Arctic Oscillation (AO)-like pattern in the stratosphere. Subsequently, these stratospheric anomalies propagate downward, causing the AO-like pattern in the troposphere in January-February, favoring warm conditions in Northeast China, and vice versa. |
英文关键词 | Sea ice Temperature Intraseasonal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000482951300004 |
WOS关键词 | ATMOSPHERIC CIRCULATION ; ARCTIC OSCILLATION ; HUDSON-BAY ; MONSOON ; CLIMATE ; AUTUMN ; PREDICTABILITY ; MECHANISMS ; IMPACTS ; DECLINE |
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/187422 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Nansen Zhu Int Res Ctr, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA |
推荐引用方式 GB/T 7714 | Dai, Haixia,Fan, Ke,Liu, Jiping. Month-to-Month Variability of Winter Temperature over Northeast China Linked to Sea Ice over the Davis Strait-Baffin Bay and the Barents-Kara Sea[J]. JOURNAL OF CLIMATE,2019,32(19):6365-6384. |
APA | Dai, Haixia,Fan, Ke,&Liu, Jiping.(2019).Month-to-Month Variability of Winter Temperature over Northeast China Linked to Sea Ice over the Davis Strait-Baffin Bay and the Barents-Kara Sea.JOURNAL OF CLIMATE,32(19),6365-6384. |
MLA | Dai, Haixia,et al."Month-to-Month Variability of Winter Temperature over Northeast China Linked to Sea Ice over the Davis Strait-Baffin Bay and the Barents-Kara Sea".JOURNAL OF CLIMATE 32.19(2019):6365-6384. |
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