{"title":"通过高分辨率观测评估(亚)热带北太平洋西部的 N2 固定通量及其控制因素","authors":"Xinran Yu, Zuozhu Wen, Ruotong Jiang, Jin-Yu Terence Yang, Zhimian Cao, Haizheng Hong, Yuntao Zhou, Dalin Shi","doi":"10.1002/lol2.10404","DOIUrl":null,"url":null,"abstract":"<p>The (sub)tropical western North Pacific is potentially an area of intense nitrogen (N<sub>2</sub>) fixation in the global ocean, despite limited understanding of the flux and controlling factors. We conducted high-resolution observations from 2016 to 2021 in this region and used machine learning algorithms to simulate N<sub>2</sub> fixation flux. Models estimated an N<sub>2</sub> fixation flux from 5.72 to 6.45 Tg N yr<sup>−1</sup>, with strong seasonal variation and peak rates in summer. The western North Pacific Subtropical Gyre and the Kuroshio Current contributed more to N<sub>2</sub> fixation flux than did the adjacent areas. Models suggested that sea surface temperature, photosynthetically available radiation, and nutrient supply were most strongly correlated with seasonal and spatial variations in N<sub>2</sub> fixation. This study provides an improved estimation of N<sub>2</sub> fixation in the western North Pacific and advances our understanding of its role in ocean productivity.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":"716-724"},"PeriodicalIF":5.1000,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10404","citationCount":"0","resultStr":"{\"title\":\"Assessing N2 fixation flux and its controlling factors in the (sub)tropical western North Pacific through high-resolution observations\",\"authors\":\"Xinran Yu, Zuozhu Wen, Ruotong Jiang, Jin-Yu Terence Yang, Zhimian Cao, Haizheng Hong, Yuntao Zhou, Dalin Shi\",\"doi\":\"10.1002/lol2.10404\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The (sub)tropical western North Pacific is potentially an area of intense nitrogen (N<sub>2</sub>) fixation in the global ocean, despite limited understanding of the flux and controlling factors. We conducted high-resolution observations from 2016 to 2021 in this region and used machine learning algorithms to simulate N<sub>2</sub> fixation flux. Models estimated an N<sub>2</sub> fixation flux from 5.72 to 6.45 Tg N yr<sup>−1</sup>, with strong seasonal variation and peak rates in summer. The western North Pacific Subtropical Gyre and the Kuroshio Current contributed more to N<sub>2</sub> fixation flux than did the adjacent areas. Models suggested that sea surface temperature, photosynthetically available radiation, and nutrient supply were most strongly correlated with seasonal and spatial variations in N<sub>2</sub> fixation. This study provides an improved estimation of N<sub>2</sub> fixation in the western North Pacific and advances our understanding of its role in ocean productivity.</p>\",\"PeriodicalId\":18128,\"journal\":{\"name\":\"Limnology and Oceanography Letters\",\"volume\":\"9 6\",\"pages\":\"716-724\"},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-05-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10404\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Limnology and Oceanography Letters\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/lol2.10404\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"LIMNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Limnology and Oceanography Letters","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/lol2.10404","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"LIMNOLOGY","Score":null,"Total":0}
Assessing N2 fixation flux and its controlling factors in the (sub)tropical western North Pacific through high-resolution observations
The (sub)tropical western North Pacific is potentially an area of intense nitrogen (N2) fixation in the global ocean, despite limited understanding of the flux and controlling factors. We conducted high-resolution observations from 2016 to 2021 in this region and used machine learning algorithms to simulate N2 fixation flux. Models estimated an N2 fixation flux from 5.72 to 6.45 Tg N yr−1, with strong seasonal variation and peak rates in summer. The western North Pacific Subtropical Gyre and the Kuroshio Current contributed more to N2 fixation flux than did the adjacent areas. Models suggested that sea surface temperature, photosynthetically available radiation, and nutrient supply were most strongly correlated with seasonal and spatial variations in N2 fixation. This study provides an improved estimation of N2 fixation in the western North Pacific and advances our understanding of its role in ocean productivity.
期刊介绍:
Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.