干旱区生态环境知识资源中心(Arid): 20192020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean

Arid

DOI	10.1038/s41598-021-91547-y
	20192020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean
	Li, Mengyu; Shen, Fang; Sun, Xuerong
通讯作者	Shen, F (corresponding author), East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the ocean. Based on a wide range of physical and biochemical data, including the Aerosol Robotic Network, multi-satellite observations, and Argo floats, we investigated the spatio-temporal variations and mixed compositions of aerosol particles, deposition in the coastal waters of eastern Australia and the South Pacific Ocean, and biogeochemical responses in the water column. Four types of wildfire-derived mixed particles were classified by using the optical properties of aerosols into four types, including the background aerosols, mineral dust, wildfire smoke particles, and residual smoke. The coarse particles accounted for more than 60% of the mineral dust on 22 November 2019 in the Tasman Sea; afterwards, during the wildfire smoke episode from December 2019 to January 2020, the particles affected large areas of the atmosphere such as eastern Australia, the South Pacific Ocean, and South America. The maximum value of the aerosol optical depth reached 2.74, and the proportion of fine particles accounted for 98.9% in the smoke episode. Mineral dust and smoke particles from the fire emissions changed the particle composition in the surface ocean. Particle deposition accounted for increases in chlorophyll-a concentration (Chla) standardized anomaly up to maximum of 23.3 with a lag time of less than 8 days. In the vertical direction, float observations showed the impact of exogenous particles on the water column could up to 64.7 m deep, resulting in Chla of 1.85 mg/m(3). The high Chla lasted for a minimum period of two months until it returned to normal level.
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000663785600038
WOS关键词	OPTICAL-PROPERTIES ; MINERAL DUST ; IRON FERTILIZATION ; SOURCE REGIONS ; CHLOROPHYLL-A ; PARTICLE-SIZE ; DESERT DUST ; AEROSOL ; BIOMASS ; SEA
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351745
作者单位	[Li, Mengyu; Shen, Fang; Sun, Xuerong] East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China
推荐引用方式 GB/T 7714	Li, Mengyu,Shen, Fang,Sun, Xuerong. 20192020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean[J],2021,11(1).
APA	Li, Mengyu,Shen, Fang,&Sun, Xuerong.(2021).20192020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean.SCIENTIFIC REPORTS,11(1).
MLA	Li, Mengyu,et al."20192020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean".SCIENTIFIC REPORTS 11.1(2021).