Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04972-1 |
On the seasonal variability of the Oyashio extension fronts | |
Wu, Baolan1,2; Lin, Xiaopei1,2; Qiu, Bo3 | |
2019-12-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53期号:11页码:7011-7025 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Previous study reported that the annual-mean eastern Oyashio Extension (OE) front shifts northward while the western OE front has no obvious poleward shift during 1982-2017 by Wu et al. (Geophys Res Lett 45:9042-9048, 2018). Here we revisit this topic and focus on the seasonal variability and shifts of the OE fronts from 1982 to 2018, with observational reanalysis data and a 1.5-layer reduced-gravity model simulation. In winter, both the western and eastern OE fronts demonstrate consistent northward movement. While in summer, the eastern OE front still moves northward but the western OE front has no obvious and even southward shift. It is shown that the trade wind's expansion during 1982-2018 favours the northward shift of the OE fronts for both winter and summer. However, there is a local cold Ekman heat transport anomaly along the western OE front in summer, which surpasses the effect of trade wind expansion and prohibits northward movement of the front. This cold Ekman advection is due to a westerly wind anomaly induced firstly by the Atlantic Multi-decadal Oscillation (AMO) and secondly by the Pacific Decadal Oscillation (PDO). In winter, the local Ekman heat transport is less effective than in summer in changing the OE front position because of the deep mixed layer. Our study demonstrates the seasonality of the OE front shift and highlights the importance of local Ekman heat transport associated with the AMO. Our results also partly explain the rainfall changes in both winter and summer in the western Pacific Ocean in the past 37 years, since the rainband east of Japan is affected by the sea surface temperature and its front. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494681900029 |
WOS关键词 | NORTH PACIFIC ; KUROSHIO EXTENSION ; CLIMATE VARIABILITY ; MODEL ; OCEAN ; OSCILLATION ; BALANCE |
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/224276 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Ocean Univ China, Inst Adv Ocean Study, Phys Oceanog Lab, Qingdao 266100, Shandong, Peoples R China; 2.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266100, Shandong, Peoples R China; 3.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Wu, Baolan,Lin, Xiaopei,Qiu, Bo. On the seasonal variability of the Oyashio extension fronts[J]. CLIMATE DYNAMICS,2019,53(11):7011-7025. |
APA | Wu, Baolan,Lin, Xiaopei,&Qiu, Bo.(2019).On the seasonal variability of the Oyashio extension fronts.CLIMATE DYNAMICS,53(11),7011-7025. |
MLA | Wu, Baolan,et al."On the seasonal variability of the Oyashio extension fronts".CLIMATE DYNAMICS 53.11(2019):7011-7025. |
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