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孟加拉湾的叶绿素a,海表温度和风速的趋势
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国家自然科学基金（41430968）；广东国际战略研究院重大项目（17ZDA24）


The propensity of chlorophyll-a,sea surface temperature and wind speed in the Bay of Bengal
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    摘要:

    孟加拉湾（BoB）是一个高能量活跃的地区，其短期内的动态变化将对浮游环境产生巨大影响."风泵"能够在BoB海域导致垂直的混合从而影响海表温度和叶绿素浓度.本文对2006——2016年的月平均Aqua-MODIS叶绿素a （chl-a）浓度数据和Sea WiFS月度气候态数据进行了分析，研究了叶绿素浓度的时间/季节变化和温度以及风速的关系.基于季风期间的chl-a变异与海表温度（SST），评估了在BoB海域它们之间的关系和变化.chl-a浓度值的趋势分析表明，该区域的垂直混合非常低，冬季最高，夏季最低.冬季最大chl-a浓度值为0.50 mg/m3，并且从2月开始下降到夏季季风期间.与冬季季风相比，夏季季风期间叶绿素表现出较低的浓度.在夏季季风期间，特别是在7月和8月，由于云层密集，卫星传感器无法准确捕获chl-a浓度值.chl-a浓度和SST之间相关系数R2值为0.218 1.

    Abstract:

    The Bay of Bengal (BoB) is a high energy active region,dynamics of BoB varies during short term with huge effect over the planktonic environment."Wind pump" induces vertical mixing in the BoB region,which affects the sea surface temperature (SST) and chlorophyll-a (chl-a).This study demonstrates the temporal/seasonal variation of chl-a concentration and its relationship to SST and wind speed.Monthly averaged Aqua-MODIS chl-a data for a period of 10 years (2006-2016) and Sea WiFS monthly climatology data were analyzed.Based on monsoonal chl-a and SST variability,we appraised their relationship and variations over the BoB.Trend analysis of chl-a concentration values shows that vertical mixing is very low in this region with weak annual phase,which reaches its maximum in winter and minimum in summer.About 0.50 mg/m3 is observed during winter as the maximum chl-a concentration value and then decreases since February until summer monsoon period.Summer monsoon period is identified as lack of chl-a concentration,compared to winter monsoon period.In summer monsoon period,especially in July and August,satellite sensors couldn't capture chl-a concentration values accurately due to the dense cloud cover.The R2 value for relationship between chl-a concentration and SST is observed to be 0.218 1.

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Danushka FERNANDO,唐丹玲,徐华兵.孟加拉湾的叶绿素a,海表温度和风速的趋势[J].南京信息工程大学学报(自然科学版),2018,10(3):334-341
Danushka FERNANDO, TANG Danling, XU Huabing. The propensity of chlorophyll-a, sea surface temperature and wind speed in the Bay of Bengal[J]. Journal of Nanjing University of Information Science & Technology, 2018,10(3):334-341

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  • 收稿日期:2018-04-10
  • 在线发布日期: 2018-07-25

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