干旱区生态环境知识资源中心(Arid): Characterizing and Quantifying African Dust Transport and Deposition to South America: Implications for the Phosphorus Budget in the Amazon Basin

Arid

DOI	10.1029/2020GB006536
	Characterizing and Quantifying African Dust Transport and Deposition to South America: Implications for the Phosphorus Budget in the Amazon Basin
	Prospero, Joseph M.; Barkley, Anne E.; Gaston, Cassandra J.; Gatineau, Alexandre; Sansano, Arthur Campos y; Panechou, Kathy
通讯作者	Prospero, JM
来源期刊	GLOBAL BIOGEOCHEMICAL CYCLES
ISSN	0886-6236
EISSN	1944-9224
出版年	2020
卷号	34 期号:9
英文摘要	Soils in the Amazon Basin are deficient in phosphorus, essential to soil fertility. Previous studies suggested that African mineral dust deposited to Amazonian soils served as an important source of phosphorus that enhances soil fertility. These studies lacked the quantitative measurements essential to validate estimates. Here we present daily measurements of mineral dust and PM(10)carried in the trade winds at Cayenne, French Guiana, during 2002-2017. MERRA-2 model dust concentrations showed excellent agreement with measurements over this period. Consequently, we used MERRA-2 to estimate temporal and spatial deposition rates to Amazonia. Our annual deposition rate, 8-10 Tg dust, is substantially lower than previous estimates. Deposition rates are greatest over the northern and northeastern regions of South America. In contrast, rates are low in central Amazonia. Our results raise questions about the impact of African dust on soil fertility in Amazonia. However, African aerosol transport carries other aerosol species that could play a role in soil fertility, including biomass-burning products known to contain substantial concentrations of phosphorus. Our study highlights the need for more measurements of aerosol and precipitation chemistry over wider expanses of South America in order to better characterize aerosol chemical and physical properties, to identify aerosol sources, and to constrain model estimates. We show that over 2002-2017 dust transport to South America was negatively correlated to rainfall over the Sahel in North Africa. Long-term monitoring is needed to capture changes in transport from Africa that might occur as a result of climate change.
英文关键词	mineral dust biomass burning phosphorus Amazon Basin South America soil fertility PM10
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000576406900002
WOS关键词	AEROSOL OPTICAL DEPTH ; CLOUD CONDENSATION NUCLEI ; EQUATORIAL NORTH-ATLANTIC ; LONG-TERM OBSERVATIONS ; SAHARAN DUST ; RAIN-FOREST ; PATAGONIA DESERT ; RANGE TRANSPORT ; RADIOGENIC SR ; GLOBAL OCEAN
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326688
作者单位	[Prospero, Joseph M.; Barkley, Anne E.; Gaston, Cassandra J.] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA; [Gatineau, Alexandre; Sansano, Arthur Campos y; Panechou, Kathy] ATMO Guyane, Remire Montjoly, France
推荐引用方式 GB/T 7714	Prospero, Joseph M.,Barkley, Anne E.,Gaston, Cassandra J.,et al. Characterizing and Quantifying African Dust Transport and Deposition to South America: Implications for the Phosphorus Budget in the Amazon Basin[J],2020,34(9).
APA	Prospero, Joseph M.,Barkley, Anne E.,Gaston, Cassandra J.,Gatineau, Alexandre,Sansano, Arthur Campos y,&Panechou, Kathy.(2020).Characterizing and Quantifying African Dust Transport and Deposition to South America: Implications for the Phosphorus Budget in the Amazon Basin.GLOBAL BIOGEOCHEMICAL CYCLES,34(9).
MLA	Prospero, Joseph M.,et al."Characterizing and Quantifying African Dust Transport and Deposition to South America: Implications for the Phosphorus Budget in the Amazon Basin".GLOBAL BIOGEOCHEMICAL CYCLES 34.9(2020).