干旱区生态环境知识资源中心(Arid): Provenance tracing of long-range transported dust over the Northeastern Arabian Sea during the southwest monsoon

Arid

DOI	10.1016/j.atmosres.2020.105377
	Provenance tracing of long-range transported dust over the Northeastern Arabian Sea during the southwest monsoon
	Suresh, K.; Singh, Udisha; Kumar, Ashwini; Karri, Damodararao; Peketi, Aditya; Ramaswamy, V
通讯作者	Kumar, A (corresponding author), CSIR Natl Inst Oceanog, Geol Oceanog Div, Panaji 403004, Goa, India.
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	250
英文摘要	One of the major pathways for dust supply to surface water of the Arabian Sea is via wet deposition, which is significant during southwest Monsoon (June-September). Aeolian dust supplies macro and micronutrients, which can impact on several marine biogeochemical processes. Here we report, major elements and rare earth elements (REEs) content as well as mineralogical and Sr-Nd isotopic composition of particulate collected from wet deposition (WDP) during the southwest monsoon period over the Northeastern Arabian Sea (NEAS) (Goa; 15.4 degrees N, 73.8 degrees E) in 2013. The collected WDP samples are classified into three categories based on changing wind regime, namely: (1) beginning of monsoon (BM; June); (2) mid of monsoon (MM; July-August) and (3) end of monsoon (EM; September). Our result highlights a significant temporal variability in REEs pattern showing a decreasing trend of La-n/Yb-n and relatively higher Eu*/Eu anomaly during mid of monsoon compared to beginning and end of monsoon period. High palygorskite (P) with moderate smectite (S) is observed for beginning of monsoon and majority of mid monsoon samples, however, high smectite with moderate palygorskite and negligible palygorskite and smectite abundance is observed for few of mid monsoon and end of monsoon samples, respectively, indicating change in dust sources during the southwest monsoon period. We also observed temporal variability in Sr-87/Sr-86 (0.7090-0.7193) and epsilon(Nd) (-2.3 to-9.1) isotopic compositions wherein less radiogenic Sr-87/Sr-86 and relatively more positive epsilon(Nd) is exhibited by mid of monsoon samples compared to those observed in beginning and end of monsoon collections. The seasonal variability in geochemical tracers are related to changes in the dust source areas which are identified as (1) the Arabian Peninsula contributing significantly in beginning of monsoon and majority of mid monsoon samples; (2) Northeastern Africa contributing to some of the mid monsoon samples and (3) Southwest Asia and Thar Desert in end of monsoon samples. These source identification using geochemical tracers are corroborated by the satellite images (CALIPSO and aerosol index maps) and back-trajectory analyses.
英文关键词	Arabian Sea Mineral dust Sr-Nd isotopes Clay mineralogy Wet deposition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000612174500004
WOS关键词	RARE-EARTH-ELEMENTS ; AFRICAN DUST ; ATLANTIC-OCEAN ; MINERAL DUST ; DESERT DUST ; AIR-QUALITY ; SUMMER ; AEROSOLS ; IMPACT ; CLAY
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349658
作者单位	[Suresh, K.; Singh, Udisha; Kumar, Ashwini; Karri, Damodararao; Peketi, Aditya; Ramaswamy, V] CSIR Natl Inst Oceanog, Panaji, Goa, India; [Suresh, K.] Goa Univ, Sch Earth Ocean & Atmospher Sci, Taleigao, Goa, India; [Singh, Udisha] CSIR Natl Inst Oceanog, Acad Sci & Innovat Res AcSIR, Panaji, Goa, India
推荐引用方式 GB/T 7714	Suresh, K.,Singh, Udisha,Kumar, Ashwini,et al. Provenance tracing of long-range transported dust over the Northeastern Arabian Sea during the southwest monsoon[J],2021,250.
APA	Suresh, K.,Singh, Udisha,Kumar, Ashwini,Karri, Damodararao,Peketi, Aditya,&Ramaswamy, V.(2021).Provenance tracing of long-range transported dust over the Northeastern Arabian Sea during the southwest monsoon.ATMOSPHERIC RESEARCH,250.
MLA	Suresh, K.,et al."Provenance tracing of long-range transported dust over the Northeastern Arabian Sea during the southwest monsoon".ATMOSPHERIC RESEARCH 250(2021).