文献类型：期刊文献

英文题名：Winter monsoon brings substantial terrestrial aerosols to Bay of Bengal and adjacent Indian Ocean: Insights from carbon and nitrogen isotopes

作者：Lao, Qibin[1,2,3];Lu, Xuan[1,2,3];He, Guirong[1,2,3];Li, Hongliang[4];Chen, Fajin[1,2,3];Jin, Guangzhe[1,2,3];Chen, Chunqing[1,2,3];Zhou, Xin[1,2,3];Zhu, Qingmei[1,2,3];Wu, Junhui[1,2,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov, Zhanjiang 524088, Peoples R China;[4]Minist Nat Resources, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou 310012, Peoples R China

年份：2024

卷号：329

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:001238897800001)、、EI(收录号：20241816026027)、Scopus(收录号：2-s2.0-85191793008)、WOS

基金：The authors would like to thank Second Institute of Oceanography, Ministry of Natural Resources, for its support in collecting water sam- ples. The authors would like to thank the crew of R/V Xianyanghong-06 for their assistance for the sampling. This study was supported by the Natural Science Foundation of China (42176039, 92158201) , Global Change and Air -Sea Interaction II Program (GASI-01-EIND-STwin) , Entrepreneurship Project of Shantou (2021112176541391) , Scientific Research Start -Up Foundation of Shantou University (NTF20006) , and Guangdong Provincial College Innovation Team Project (2019KCXTF021) .

语种：英文

外文关键词：Aerosols; Carbon and nitrogen; Stable isotopes; Atmospheric long-distance transportation; Bay of Bengal; Indian Ocean

外文摘要：It has been currently recognized that air pollutants (e.g., carbon and nitrogen) from South and Southeast Asia have a significant impact on the coastal waters of the northern Indian Ocean. However, the understanding of dynamics and fates of these pollutants in aerosols to the remote ocean through long-distance transportation still needs to be improved. To address this issue, stable isotopic compositions (delta 13C, delta 15N) of total carbon (TC) and nitrogen (TN) and other geochemical indexes in aerosols are investigated over the Bay of Bengal (BOB) and the adjacent Indian Ocean during the winter monsoon period. The concentrations of TN, TC and aerosol nutrients exhibited a decreasing trend from the northern BOB (N-BOB) to the southern BOB (S-BOB) and Indian Ocean, reflecting the weakening trend of polluted continental influence from the N-BOB to the ocean. The high concentrations of TC (4.28-18.21 mu g m-3) in the aerosols of the N-BOB were mainly influenced by the emissions of coal combustion (68 +/- 21%), while the high concentrations of TN (0.69-7.31 mu g m-3) in the N-BOB were mainly from biofuel/biomass burning (52 +/- 31%). In the S-BOB, the lower concentrations of TC (1.42-2.98 mu g m-3) and TN (0.38-2.03 mu g m-3) mainly originated from the formation of secondary aerosols and the changes in aerosol chemical composition during long-distance transportation from the continent. The primary marine source was responsible for the low TC and TN concentrations over the Indian Ocean. This study quantifies the nitrogen and carbon source shifts from continental anthropogenic activities in the N-BOB to dominant marine and photochemical transformation sources in the remote ocean, quantitatively deepening the understanding of the impact of terrestrial aerosols on the ocean.