Remote Sensing of the Seasonal and Interannual Variability of Surface Chlorophyll-a Concentration in the Northwest Pacific over the Past 23 Years (1997–2020)
Remote Sensing of the Seasonal and Interannual Variability of Surface Chlorophyll-a Concentration in the Northwest Pacific over the Past 23 Years (1997–2020)
复制标题
近23年西北太平洋表层叶绿素a浓度季节和年际变化的遥感研究（1997-2020）
DOI：
10.3390/rs14215611
复制
发表时间：
2022
期刊：
影响因子：
5
通讯作者：
Jingyuan Xi
中科院分区：
文献类型：
--
作者：
Shuangling Chen;Yu Meng;Sheng Lin;Jingyuan Xi
西北太平洋浮游植物在吸收大气CO2和促进海洋碳循环方面发挥着重要作用。然而，我们的知识在这一地区的浮游植物生物量的长期年际变化是相当有限的。基于1997-2020年的海洋观测宽视场传感器（SeaWiFS）和中分辨率成像光谱仪（MODIS）水色卫星观测数据，分析了叶绿素a浓度的季节和年际变化特征及其长期变化趋势。浮游植物Chl-a表现出较大的空间动态，总体上呈向极地递减的趋势。季节性的浮游植物水华控制了叶绿素a的季节特征，春季和秋季水华在副极地沃茨和单一的春季水华在亚热带海域。在年际尺度上，我们发现，从边缘海到东北公海沃茨，在副极地海洋中Chl-a有一个增加带，Chl-a有显著的正趋势（平均约0.02 mg m−3 yr−1）（p <0.05）。
Phytoplankton in the northwest Pacific plays an important role in absorbing atmospheric CO2 and promoting the ocean carbon cycle. However, our knowledge on the long-term interannual variabilities of the phytoplankton biomass in this region is quite limited. In this study, based on the Chlorophyll-a concentration (Chl-a) time series observed from ocean color satellites of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer (MODIS) in the period of 1997–2020, we investigated the variabilities of Chl-a on both seasonal and interannual scales, as well as the long-term trends. The phytoplankton Chl-a showed large spatial dynamics with a general decreasing pattern poleward. The seasonal phytoplankton blooms dominated the seasonal characteristics of Chl-a, with spring and fall blooms identified in subpolar waters and single spring blooms in subtropical seas. On interannual scales, we found a Chl-a increasing belt in the subpolar oceans from the marginal sea toward the northeast open ocean waters, with positive trends (~0.02 mg m−3 yr−1, on average) in Chl-a at significant levels (p