Satellite Remote Sensing of Space-Time Plankton Variability in the Bay of Bengal: Connections to Cholera Outbreaks.
Satellite Remote Sensing of Space-Time Plankton Variability in the Bay of Bengal: Connections to Cholera Outbreaks.
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DOI：
10.1016/j.rse.2012.03.005
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发表时间：
2012-08
影响因子：
13.5
通讯作者：
Islam, Shafiqul
中科院分区：
文献类型：
--
作者：
Jutla, Antarpreet S.;Akanda, Ali S.;Islam, Shafiqul
关键词：
霍乱细菌与沿海浮游生物有很强的联系。测定孟加拉湾北部浮游生物丰度的替代物叶绿素的时空变化特征，是开发利用遥感预测孟加拉三角洲地区霍乱暴发的任何方法的重要第一步。本研究利用来自SeaWiFS的数据，利用十年的卫星数据，量化了孟加拉湾地区叶绿素的时空分布。叶绿素在日尺度上的变异，不考虑空间平均，类似于白噪声。在月尺度上，叶绿素具有明显的季节性，靠近海岸的叶绿素值明显高于近海。而在月尺度的像元水平（9 km），叶绿素在时间上的持久性不强。随着空间平均的增加，叶绿素的时间持久性增加，滞后1自相关在1296 km2或更大的面积平均上稳定在0.60左右。与近海地区相比，叶绿素的空间分析表明，只有沿海地区具有稳定的100 km相关长度。在沿海（近海）地区存在（不存在）相关长度，表明这两个地区可能有两个独立的过程控制浮游植物的生产。本研究对卫星测量的浮游生物在1296 km2-月尺度上的时空平均设定了下限，以建立与孟加拉三角洲霍乱发病率的关系。
Cholera bacteria exhibit strong association with coastal plankton. Characterization of space-time variability of chlorophyll, a surrogate for plankton abundance, in Northern Bay of Bengal is an essential first step to develop any methodology for predicting cholera outbreaks in the Bengal Delta region using remote sensing. This study quantifies the space-time distribution of chlorophyll, using data from SeaWiFS, in the Bay of Bengal region using ten years of satellite data. Variability of chlorophyll at daily scale, irrespective of spatial averaging, resembles white noise. At a monthly scale, chlorophyll shows distinct seasonality and chlorophyll values are significantly higher close to the coast than in the offshore regions. At pixel level (9 km) on monthly scale, on the other hand, chlorophyll does not exhibit much persistence in time. With increased spatial averaging, temporal persistence of chlorophyll increases and lag one autocorrelation stabilizes around 0.60 for 1296 km2 or larger areal averages. In contrast to the offshore regions, spatial analyses of chlorophyll suggest that only coastal region has a stable correlation length of 100 km. Presence (absence) of correlation length in the coastal (offshore) regions, indicate that the two regions may have two separate processes controlling the production a phytoplankton This study puts a lower limit on space-time averaging of satellite measured plankton at 1296 km2-monthly scale to establish relationships with cholera incidence in Bengal Delta.
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影响因子：
13.5
作者：
Gregg, WW;Casey, NW
通讯作者：
Casey, NW
影响因子：
0.5
作者：
CAMPBELL, JW;ESAIAS, WE
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ESAIAS, WE
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6.4
作者：
BACCHI, B;KOTTEGODA, NT
通讯作者：
KOTTEGODA, NT
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4.4
作者：
Binsztein, N;Costagliola, MC;Colwell, R
通讯作者：
Colwell, R
影响因子：
13.5
作者：
D'Sa, EJ;Miller, RL
通讯作者：
Miller, RL