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Spatial and temporal variabilities of spring Asian dust events and their impacts on chlorophyll-a concentrations in the western North Pacific Ocean

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Title
Spatial and temporal variabilities of spring Asian dust events and their impacts on chlorophyll-a concentrations in the western North Pacific Ocean
Authors
Yoon, Joo-Eun
Kim, Kitae
Macdonald, Alison M.
Park, Ki-Tae
Kim, Hyun-cheol
Yoo, Kyu-Cheul
Yoon, Ho Il
Yang, Eun Jin
Jung, Jinyoung
Lim, Jae-Hyun
Kim, Ju-Hyoung
Lee, Jiyoung
Choi, Tae-Jun
Song, Jae-Min
Kim, Il-Nam
Subject
Geology
Issue Date
2017
Citation
Yoon, Joo-Eun, et al. 2017. "Spatial and temporal variabilities of spring Asian dust events and their impacts on chlorophyll-a concentrations in the western North Pacific Ocean". Geophysical Research Letter, 44(3): 1474-1482.
Abstract
As the western North Pacific Ocean is located downwind of the source regions for spring Asian dust, it is an ideal location for determining the response of open waters to these events. Spatial analysis of spring Asian dust events from source regions to the western North Pacific, using long-term daily aerosol index data, revealed three different transport pathways supported by the westerly wind system: one passing across the northern East/Japan Sea (40°N-50°N), a second moving over the entire East/Japan Sea (35°N-55°N), and a third flowing predominantly over the Siberian continent (>50°N). Our results indicate that strong spring Asian dust events can increase ocean primary productivity by more than 70% (>2-fold increase in chlorophyll-a concentrations) compared to weak/nondust conditions. Therefore, attention should be paid to the recent downturn in the number of spring Asian dust events and to the response of primary production in the western North Pacific to this change.
DOI
http://dx.doi.org/10.1002/2016GL072124
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