| 近20年渤海叶绿素a浓度时空变化 |
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| 引用本文： | 田洪阵,刘沁萍,Joaquim I. Goes,Helga do Rosario Gomes,杨萌萌.近20年渤海叶绿素a浓度时空变化[J].海洋学报,2019,41(8):131-140. |
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| 作者姓名： | 田洪阵 刘沁萍 Joaquim I. Goes Helga do Rosario Gomes 杨萌萌 |
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| 作者单位： | 天津工业大学 经济与管理学院,天津 300387;哥伦比亚大学 拉蒙特多尔蒂地球观测站,纽约州 纽约 10964;天津工业大学 经济与管理学院,天津,300387;哥伦比亚大学 拉蒙特多尔蒂地球观测站,纽约州 纽约 10964;名古屋大学 环境学研究生院,爱知 名古屋,4648601 |
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| 基金项目： | 天津市哲学社会科学研究规划项目（TJGL15-028）；天津市高等学校创新团队培养计划（TD13-5038）；教育部人文社会科学研究项目（16YJCZH082）；天津市高等学校人文社会科学研究项目（20142111）。 |
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| 摘 要： | 浮游植物作为食物链的基础，对海洋生态系统具有重要作用。渤海作为我国最大的内海和重要渔业生物的产卵场、育幼场和索饵场，该区浮游植物研究具有重要意义。叶绿素a浓度是反映浮游植物生物量的重要指标。利用Google Earth Engine平台，对1997–2010年的宽视场海洋观测传感器(SeaWiFS)叶绿素a浓度数据和2002–2018年的水色卫星中分辨率成像光谱仪传感器(MODIS Aqua)叶绿素a浓度数据进行合并，并研究其时空变化特征。研究表明，近20年来，渤海全年叶绿素a浓度增加了14.1%，且增加显著。叶绿素a浓度在所有季节都呈现增加趋势；除11月外，其他各月都呈现稳定或增加趋势。从滦河入河口沿岸至渤海海峡的渤海中部，叶绿素a浓度增加较明显。同时也分析了海洋表面温度、风速和降水量数据。夏季渤海周边区域降水量和风速增加以及秋季海表温度的降低都有助于同季叶绿素a浓度的升高。渤海浮游植物可能受陆源营养物质输入影响较大。
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| 关 键 词： | 叶绿素a浓度 降水 海洋表面温度 风速 SeaWiFS MODIS Aqua Google Earth Engine 渤海 |
| 收稿时间： | 2018/10/11 0:00:00 |
| 修稿时间： | 2019/1/7 0:00:00 |
Temporal and spatial changes in chlorophyll a concentrations in the Bohai Sea in the past two decades |
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| Tian Hongzhen,Liu Qinping,Joaquim I. Goes,Helga do Rosario Gomes and Yang Mengmeng.Temporal and spatial changes in chlorophyll a concentrations in the Bohai Sea in the past two decades[J].Acta Oceanologica Sinica (in Chinese),2019,41(8):131-140. |
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| Authors: | Tian Hongzhen Liu Qinping Joaquim I Goes Helga do Rosario Gomes and Yang Mengmeng |
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| Institution: | 1.School of Economics and Management, Tianjin Polytechnic University, Tianjin 300387, China2.Lamont Doherty Earth Observatory, Columbia University, New York 10964, USA3.Graduate School of Environmental Studies, Nagoya University, Nagoya 4648601, Japan |
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| Abstract: | Phytoplankton, as the base of the oceanic food chain, plays a fundamental role in marine ecosystems. Since the Bohai Sea, the largest inner sea in China, is an important spawning ground and nursery field as well as a feeding ground for marine creatures, it is critical to understand variations of phytoplankton in the area. Chlorophyll a (Chl a) concentration is an important proxy for phytoplankton biomass. Chl a derived from both the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) from 1997 to 2010 and the MODerate resolution Imaging Spectroradiometer (MODIS) sensor on satellite Aqua from 2002 to 2018 were combined into one time series to investigate the spatial and temporal variability of Chl a concentrations in the Bohai Sea using Google Earth Engine. Annual Chl a concentrations increased significantly by 14.1% in the study area over the past two decades. Chl a concentrations in every season and in all months except November have stagnated or increased. Chl a concentrations increased mainly in the middle part of the sea. Sea surface temperature (SST), wind speed and precipitation were also analyzed. Increases in precipitation over the land around the Bohai Sea and wind speed in summer, as well as decrease in SST in autumn, all contributed to the rises of Chl a concentrations. Nutrients from land may play an important role in phytoplankton growth. |
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| Keywords: | chlorophyll a concentration precipitation sea surface temperature wind speed SeaWiFS MODIS Aqua Google Earth Engine Bohai Sea |
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