利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响*

doi:10.11978/2015051

热带海洋学报 ›› 2016, Vol. 35 ›› Issue (3): 1-10.doi: 10.11978/2015051CSTR: 32234.14.2015051

• 海洋水文学 • 下一篇

利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响^*

胡水波^{1, 2}, 曹文熙¹, 王桂芬¹, 许占堂¹

1. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东广州 510301;
2. 中国科学院大学, 北京 100049;

收稿日期:2015-04-14 出版日期:2016-05-29 发布日期:2016-05-27
通讯作者: 曹文熙。E-mail: wxcao@scsio.ac.cn
作者简介:作者简介：胡水波(1987—), 男, 河南省周口市人, 博士研究生, 主要从事海洋光学研究。E-mail: hsb514@163.com
基金资助:
国家自然科学基金项目(41376042、41176035); 深圳市科技计划项目(JSGG20130923093840265); 国家青年科学基金项目(41206029); 中国科学院南海海洋研究所青年人才基金(SQ201102); 中科院先导专项(XDA11040302)

Using MODIS to track and monitor the impact of a cold eddy on the bio-optical parameters of surface waters^*

HU Shuibo^{1, 2}, CAO Wenxi¹, WANG Guifen¹, XU Zhantang¹

1. State Key Laboratory of Tropics Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;

Received:2015-04-14 Online:2016-05-29 Published:2016-05-27
Contact: CAO Wenxi. E-mail: wxcao@scsio.ac.cn
Supported by:
National Natural Science Foundation of China grants (41376042, 41176035); Science and Technology Plan Project of Shen Zhen (JSGG20130923093840265); Natural Science for Youth Foundation (41206029); Youth Foundation supported by South China Sea Institute of Oceanology Chinese academy of sciences (SQ201102); Strategic Priority Research Program of the Chinese Academy of Sciences (XDA11040302)

摘要/Abstract

摘要： 研究中尺度涡对海洋上层生物地球化学过程的影响已经得到越来越多的关注, 水色遥感作为一个重要的工具可以为此提供大时空尺度的数据来源。基于南海区域性生物光学反演算法, 对2007年1月底发源于吕宋海峡西南侧的一个冷涡进行跟踪监测。在冷涡生成初期, 涡旋携带吕宋海峡高营养高生物量海水向西北方向移动, 内部叶绿素a (Chl a)保持高浓度。冷涡停留期间(长达一个月), 在涡致抽吸的持续作用下, 冷涡内Chl a浓度由0.26mg•m^-3增长到0.33mg•m^-3; 而进入春季, 涡旋外的Chl a浓度则由0.24mg•m^-3减小到0.15mg•m^-3; 颗粒有机碳(POC)浓度、浮游植物吸收系数(a_ph(443))、漫射衰减系数(K_d(490))与Chl a浓度的变化一致, 而POC∶Chl a和微微型浮游植物所占的比例(F_p)则表现出与Chl a浓度相反的趋势。冷涡西移期间, 随着涡致抽吸强度的降低及所携带的营养物质被不断消耗, 涡内部Chl a浓度、POC浓度、a_ph(443)、K_d(490)逐渐降低, POC∶Chl a和F_p逐渐升高。结果表明, 在平流作用和涡致抽吸共同作用下, 冷涡所引起的光学响应可以用来帮助识别和跟踪涡旋。

关键词: 中尺度涡, 水色遥感, 生物光学算法, 南海

Abstract: Understanding biogeochemical processes associated with oceanic eddies is important, and ocean-color remote sensing has been used as a tool to provide large-scale data for such studies. Based on the latest regional bio-optical inversion algorithm in the South China Sea, we used Moderate Resolution Imaging Spectroradiometer (MODIS) to track and monitor a cold eddy originated in the late winter around the Luzon Strait. In the early stage, the eddy carrying high nutritional and high biomass seawater moved toward northwest. Then, the eddy stayed in an area for a month. During this period, with the continuous suction of the eddy, the concentration of chlorophyll-a (Chl-a) increased from 0.26 to 0.33 mg•m^-3 in the eddy area and decreased from 0.24 to 0.15 mg•m^-3 outside the eddy. The concentration of particulate organic carbon (POC), phytoplankton absorption coefficient (a_ph(443)), diffuse attenuation coefficient (K_d(490)) and colored dissolved organic matter (CDOM) showed the same variation trend with Chl-a, while the POC∶Chl-a ratio and fraction of picoplankton (F_p) exhibited opposite trends. When the eddy moved westward, Chl-a, POC, a_ph(443) and K_d(490) decreased slowly because of the weakening of eddy intensity and nutrient supply. Our results demonstrated that the special bio-optical response induced by eddy pumping and advection can be an additional tool to track and study oceanic eddies.

Key words: mesoscale eddy, ocean-color remote sensing, bio-optical algorithm, the South China Sea

中图分类号:

P724

胡水波, 曹文熙, 王桂芬, 许占堂. 利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响^*[J]. 热带海洋学报, 2016, 35(3): 1-10.

HU Shuibo, CAO Wenxi, WANG Guifen, XU Zhantang. Using MODIS to track and monitor the impact of a cold eddy on the bio-optical parameters of surface waters^*[J]. Journal of Tropical Oceanography, 2016, 35(3): 1-10.

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利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响^*

Using MODIS to track and monitor the impact of a cold eddy on the bio-optical parameters of surface waters^*

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利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响*

Using MODIS to track and monitor the impact of a cold eddy on the bio-optical parameters of surface waters*

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利用MODIS跟踪监测一个冷涡对海洋表层生物光学参数的影响^*

Using MODIS to track and monitor the impact of a cold eddy on the bio-optical parameters of surface waters^*