Dust Aerosol’s Deposition and its Effects on Chlorophyll-A Concentrations Based on Multi-Sensor Satellite Observations and Model Simulations: A Case Study

Dust Aerosol’s Deposition and its Effects on Chlorophyll-A Concentrations Based on Multi-Sensor Satellite Observations and Model Simulations: A Case Study
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基于多传感器卫星观测和模型模拟的粉尘气溶胶沉积及其对叶绿素 A 浓度的影响:案例研究

DOI:
10.3389/fenvs.2022.875365
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发表时间:
2022-05
影响因子:
4.6
通讯作者:
Yang Zhou
Yang Zhou
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Wencai Wang;Zhizheng He;Shangfei Hai;Lifang Sheng;Yongqing Han;Yang Zhou

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亚洲沙尘沉降是太平洋营养盐的重要来源,当气溶胶沙尘沉降到海洋中时,会影响生物生产力,进而影响气候。本文利用多传感器卫星观测资料和WRF-Chem模式对2019年5月21-25日发生在塔克拉玛干沙漠的一次沙尘过程进行了分析。研究发现,塔克拉玛干沙漠沙尘气溶胶在西风的作用下,从高空向东移动,越过下风向区,在太平洋沉积。沙尘气溶胶沉降导致叶绿素a(Chl-a)和颗粒有机碳(POC)浓度升高,沉降2 d后,Chl-a浓度和POC浓度分别增加了175%和873%。叶绿素a浓度和颗粒有机碳浓度分别比同期5年平均值高256%和644%。
Asian dust deposition is an important source of nutrients to the Pacific Ocean, when aerosol dust is deposited into the ocean, it will affect the biological productivity and hence climate. In this paper, we analyzed a dust process that occurred in the Taklimakan Desert during 21–25 May 2019 by employing multi-sensor satellite observations and the WRF-Chem model. It is found that dust aerosols rise in the Taklimakan Desert, moving eastward at high altitudes under the role of the westerly winds, passing over the downwind regions, and deposition in the Pacific Ocean. Dust aerosol deposition results in an increase of chlorophyll-a (Chl-a) concentrations and particulate organic carbon (POC) after 2 days, Chl-a concentrations and POC increase by 175 and 873%, respectively. Moreover, the values of Chl-a concentrations and POC are 256 and 644% higher than the 5-years average during the same period.
DOI: 10.1038/ngeo583
发表时间: 2009-08-01
期刊: NATURE GEOSCIENCE
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影响因子: 4.5
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