干旱区生态环境知识资源中心(Arid): Chemical composition of monsoon bulk precipitation in the Salalah area, Oman

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DOI	10.1016/j.chemgeo.2023.121621
	Chemical composition of monsoon bulk precipitation in the Salalah area, Oman
	Michelsen, Nils; Friesen, Jan; Strauch, Gerhard; Al-Balushi, Zulaina Mohammed; Said, Ali Bakhit Ali Bait; Al Balushi, Hajar; Schmidt, Mark; Mueller, Thomas
通讯作者	Müller, T
来源期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
EISSN	1872-6836
出版年	2023
卷号	635
英文摘要	Precipitation chemistry data provide important information for environmental studies on large-scale element cycling and anthropogenic impacts on our atmosphere, but also for hydrochemical models and groundwater recharge estimations via the Chloride Mass Balance method. Such recharge data play a crucial role in groundwater management, particularly in (semi-)arid areas. Unfortunately, precipitation analyses are often scarce in such regions. This also applies to the Arabian Peninsula, including southern Oman. To overcome this lack of rain chemistry data, we developed a strategy for automatic weekly bulk precipitation sampling, using recently designed automatic rainwater samplers. The integral samples were gathered along an elevation gradient from the Salalah coast to the Dhofar mountains during the Indian Ocean Monsoon seasons 2017 and 2018.Our major ion analyses of the rainwater samples revealed considerable temporal and spatial heterogeneity, in terms of ion proportions and absolute concentrations. Samples from the coast were relatively salty (EC mostly >3000 & mu;S cm- 1) and rich in Na+ and Cl-, reflecting small rain amounts and a sea spray effect. Further inland, solute concentrations were lower, partly due to more precipitation, and ions such as Ca2+ and SO42- gained importance, probably due to calcite and gypsum dust. This pattern reflects the interplay between solute availability (influenced by regional geology, wind direction at different altitudes, and wind speed) and precipitation amounts. Cl-/Br- ratios were fairly uniform and scattered around the seawater value. Combining ion concentrations and rain amounts yielded bulk depositions that showed an erratic pattern along the elevation gradient, i. e., depositions did not decrease steadily in inland direction, as one may assume. This suggests that the occasionally reported approach of collecting a few opportunistic grab samples at a single site is unlikely to yield data that are representative for a larger coastal study area.
英文关键词	Rain Precipitation chemistry Dry deposition Indian Ocean Monsoon Khareef Dhofar
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:001044137400001
WOS关键词	GROUNDWATER RECHARGE ; CHLORIDE DEPOSITION ; MURRAY BASIN ; RAIN WATER ; SEA-SALT ; CHEMISTRY ; AEROSOL ; DUST ; VARIABILITY ; DHOFAR
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395734
推荐引用方式 GB/T 7714	Michelsen, Nils,Friesen, Jan,Strauch, Gerhard,et al. Chemical composition of monsoon bulk precipitation in the Salalah area, Oman[J],2023,635.
APA	Michelsen, Nils.,Friesen, Jan.,Strauch, Gerhard.,Al-Balushi, Zulaina Mohammed.,Said, Ali Bakhit Ali Bait.,...&Mueller, Thomas.(2023).Chemical composition of monsoon bulk precipitation in the Salalah area, Oman.CHEMICAL GEOLOGY,635.
MLA	Michelsen, Nils,et al."Chemical composition of monsoon bulk precipitation in the Salalah area, Oman".CHEMICAL GEOLOGY 635(2023).