globalchange  > 过去全球变化的重建
DOI: 10.1111/gcb.14737
WOS记录号: WOS:000476332600001
论文题名:
Phytoplankton decline in the eastern North Pacific transition zone associated with atmospheric blocking
作者: Le, Chengfeng1; Wu, Shuyu1; Hu, Chuanmin2; Beck, Marcus W.3; Yang, Xuchao1
通讯作者: Le, Chengfeng ; Yang, Xuchao
刊名: GLOBAL CHANGE BIOLOGY
ISSN: 1354-1013
EISSN: 1365-2486
出版年: 2019
卷: 25, 期:10, 页码:3485-3493
语种: 英语
英文关键词: atmospheric blocking ; Ekman transport ; global change ; jet stream ; North Pacific transition zone ; phytoplankton
WOS关键词: CHLOROPHYLL FRONT ; CLIMATE-CHANGE ; VARIABILITY ; IMPACTS ; AMPLIFICATION ; PRODUCTIVITY ; PLANKTON ; TRENDS
WOS学科分类: Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向: Biodiversity & Conservation ; Environmental Sciences & Ecology
英文摘要:

Global climate change can significantly influence oceanic phytoplankton dynamics, and thus biogeochemical cycles and marine food webs. However, associative explanations based on the correlation between chlorophyll-a concentration (Chl-a) and climatic indices is inadequate to describe the mechanism of the connection between climate change, large-scale atmospheric dynamics, and phytoplankton variability. Here, by analyzing multiple satellite observations of Chl-a and atmospheric conditions from National Center for Environmental Prediction/National Center for Atmospheric Research reanalysis datasets, we show that high-latitude atmospheric blocking events over Alaska are the primary drivers of the recent decline of Chl-a in the eastern North Pacific transition zone. These blocking events were associated with the persistence of large-scale atmosphere pressure fields that decreased westerly winds and southward Ekman transport over the subarctic ocean gyre. Reduced southward Ekman transport leads to reductions in nutrient availability to phytoplankton in the transition zone. The findings describe a previously unidentified climatic factor that contributed to the recent decline of phytoplankton in this region and propose a mechanism of the top-down teleconnection between the high-latitude atmospheric circulation anomalies and the subtropical oceanic primary productivity. The results also highlight the importance of understanding teleconnection among atmosphere-ocean interactions as a means to anticipate future climate change impacts on oceanic primary production.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/140530
Appears in Collections:过去全球变化的重建

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作者单位: 1.Zhejiang Univ, Ocean Coll, Hangzhou, Zhejiang, Peoples R China
2.Univ S Florida, Coll Marine Sci, St Petersburg, Russia
3.Southern Calif Coastal Water Res Project, Costa Mesa, CA USA

Recommended Citation:
Le, Chengfeng,Wu, Shuyu,Hu, Chuanmin,et al. Phytoplankton decline in the eastern North Pacific transition zone associated with atmospheric blocking[J]. GLOBAL CHANGE BIOLOGY,2019-01-01,25(10):3485-3493
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