文献类型：期刊文献

英文题名：Water residence time controls seasonal nitrous oxide budget in a semi-enclosed bay: Insights from an improvement estimation method

作者：Cai, Shangjun[1,2];Lao, Qibin[1,2];Cai, Minggang[3];Silva, Dickwelle P. T. T.[1,2];Lu, Xuan[4];Zhou, Xin[1,2];Jin, Guangzhe[1,5,6];Chen, Chunqing[1,2];Chen, Fajin[1,2,5,6]

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]Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China;[4]Jimei Univ, Polar & Marine Res Inst, Coll Harbor & Coastal Engn, Xiamen 361021, Peoples R China;[5]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[6]Guangdong Ocean Univ, Resources & Environm Continental Shelf Sea & Deep, Key Lab Climate, Dept Educ, Zhanjiang 524088, Guangdong, Peoples R China

年份：2024

卷号：206

外文期刊名：MARINE POLLUTION BULLETIN

收录：SCI-EXPANDED(收录号：WOS:001309270000001)、、EI(收录号：20242816678181)、Scopus(收录号：2-s2.0-85198008939)、WOS

基金：This study was supported by the National Natural Science Foundation of China (U1901213, 92158201, 42276047) , Guangdong Provincial College Innovation Team Project (2019KCXTF021) , First-Class Disci-pline Plan of Guangdong Province (080503032101, 231420003) , and Innovation and Entrepreneurship Project of Shantou (2021112176541391) .

语种：英文

外文关键词：N2O budget; 15N isotope; Water retention time; Zhanjiang Bay

外文摘要：This study developed an estimation method for the N2O budget using 15N stable isotope labeling techniques, a dual-layer model and a box model, which was used to elucidate the underlying dynamics of N2O accumulation in Zhanjiang Bay. The results showed that although the net input of N2O during the rainy season was 2.36 times higher than that during the dry season, the overall N2O concentration was only 66.6 % of that during the dry season due to the extended water residence time in the dry season. Our findings highlighted that water residence time was the key factor for the N2O emission, and a longer water residence time was unfavorable for the efflux of N2O through hydrodynamic processes and was more conducive to the production and accumulation of N2O within the bay. This research enhanced our comprehension of N2O dynamics and provided crucial insights for refining nitrogen management strategies and mitigation efforts.