干旱区生态环境知识资源中心(Arid): African dust deposition in Puerto Rico: Analysis of a 20-year rainfall chemistry record and comparison with models

Arid

DOI	10.1016/j.atmosenv.2019.116907
	African dust deposition in Puerto Rico: Analysis of a 20-year rainfall chemistry record and comparison with models
	McClintock, M. A.; McDowell, W. H.; Gonzalez, G.; Schulz, Michael; Pett-Ridge, J. C.
通讯作者	Pett-Ridge, JC (corresponding author), Oregon State Univ, Agr & Life Sci 3017, Corvallis, OR 97331 USA.
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2019
卷号	216
英文摘要	Dust deposition represents an important flux of rock-derived nutrients such as phosphorus to ecosystems on highly weathered soils. Direct measurements of terrestrial dust deposition and its spatial variability are rare, yet they are essential for testing models of dust deposition processes and understanding the biogeochemical effects of dust. Long-term records of precipitation chemistry are available in the Luquillo Mountains of Puerto Rico, which are downwind of the world's largest dust source in Africa. We analyzed 20-year datasets of openfall, throughfall, and wet-only precipitation chemistry with weekly resolution at two different locations in the Luquillo Mountains to evaluate spatial and temporal variability of dust inputs and compare the observational records with models. Based on rainwater dissolved silica and total suspended solids content, the measured dust flux varied by a factor of 2 over a distance of 10 km despite similarities between sites in elevation and rainfall amount. In comparison with simulated dust deposition from ten models in the Aerosol Comparisons between Observations and Models (AeroCom) project, the empirical rainfall chemistry agrees well with the mean of the models on the seasonal distribution of wet dust distribution. Both the data and the models show a summer maximum in wet dust deposition that is consistent with variation in transport pathways and the dust source area emission strength based on environmental conditions in the Sahel region. The rainfall chemistry record and AeroCom models also agree in terms of attributing similar to 70% of the total dust deposition overall to dry deposition, although the range of uncertainty in the models is large. The results indicate value in combining long-term analysis of rainfall chemistry with data from satellites and models, and highlight the need for accurate ground-based metrics for dry deposition to improve understanding and modeling of dust deposition processes. The dataset complements earlier studies that characterize the dust plume originating from Northern Africa and its impact on ecosystems in South America and the Caribbean.
英文关键词	Dust deposition Dissolved silica Luquillo Caribbean Rainfall chemistry AeroCom
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000525864200005
WOS关键词	LONG-RANGE TRANSPORT ; SAHARAN DUST ; LUQUILLO MOUNTAINS ; DRY DEPOSITION ; MINERAL DUST ; SEA-SALT ; DESERT DUST ; FOREST ; CLIMATE ; AEROSOL
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369785
作者单位	[McClintock, M. A.; Pett-Ridge, J. C.] Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA; [McDowell, W. H.] Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA; [Gonzalez, G.] US Forest Serv, Int Inst Trop Forestry, USDA, Rio Piedras, PR USA; [Schulz, Michael] Norwegian Meteorol Inst, Oslo, Norway
推荐引用方式 GB/T 7714	McClintock, M. A.,McDowell, W. H.,Gonzalez, G.,et al. African dust deposition in Puerto Rico: Analysis of a 20-year rainfall chemistry record and comparison with models[J],2019,216.
APA	McClintock, M. A.,McDowell, W. H.,Gonzalez, G.,Schulz, Michael,&Pett-Ridge, J. C..(2019).African dust deposition in Puerto Rico: Analysis of a 20-year rainfall chemistry record and comparison with models.ATMOSPHERIC ENVIRONMENT,216.
MLA	McClintock, M. A.,et al."African dust deposition in Puerto Rico: Analysis of a 20-year rainfall chemistry record and comparison with models".ATMOSPHERIC ENVIRONMENT 216(2019).