文献类型：期刊文献

英文题名：Responses of the dynamics of particulate organic matter to different track typhoons in coastal waters

作者：Chen, Chunqing[1,2];Lao, Qibin[1,2];Zhou, Xin[1,2];Cai, Shangjun[1,2];Liu, Sihai[1,2];Chen, Fajin[1,2,3,4]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Dept Educ Guangdong Prov, Key Lab Climate Resources & Environm Continental S, Zhanjiang 524088, Peoples R China

年份：2025

卷号：272

外文期刊名：MARINE CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:001579051600001)、、EI(收录号：20253318991216)、Scopus(收录号：2-s2.0-105013144745)、WOS

基金：This study was supported by the National Natural Science Founda-tion of China (42276047, 92158201) , Guangdong Basic and Applied Basic Research Foundation (2024A1515110183) , Entrepreneurship Project of Shantou (2021112176541391) , Scientific Research Start-Up Foundation of Shantou University (NTF20006) , Guangdong Provincial College Innovation Team Project (2019KCXTF021) .

语种：英文

外文关键词：Typhoons; Decomposition; Particulate organic matter; Stable isotopes

外文摘要：The impact of typhoons on marine biogeochemical processes depends on their intensity, track, and speed. However, how particulate organic matter (POM) dynamics respond to typhoons with distinct tracks remains poorly understood. This study investigated physicochemical parameters and stable isotopes of POM (delta 13C-POC and delta 15N-PN) through continuous observations (one cruise before the typhoon and four cruises after the typhoon, with a 5-day interval) in Zhanjiang Bay following two distinct track typhoons. During Typhoon Lionrock (landfall on the left side of the bay), onshore-wind stress drove high-salinity seawater intrusion, forming a strong salinity front in the bay that suppressed phytoplankton growth (Chl-a decreased by 80 %). In contrast, Typhoon Chaba (landfall on the right side of the bay) generated offshore-wind stress that resulted in weaker water mixing, while abundant terrestrial nutrient input promoted phytoplankton growth (Chl-a increased by two times in the 2nd and 4th cruises after the typhoon). Nevertheless, positive apparent oxygen utilization (AOU) values in the water column were observed after both typhoons, indicating strong decomposition of POM in Zhanjiang Bay. The strongest decomposition (over 80 %) for the two typhoons all occurred after 3 days of the typhoon landfall, and gradually decreased after 8 days of the typhoon landfall. The POM degraded after Typhoon Lionrock mainly originated from resuspended old POM, while from fresh POM (phytoplankton) after Typhoon Chaba. Additionally, the decomposition degree (56 %) induced by Lionrock was stronger than that induced by Chaba (44 %), suggesting that the typhoon landing on the left side of the bay are not conducive to marine carbon burial.