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首页> 外文会议>Remote Sensing of the Marine Environment; Proceedings of SPIE-The International Society for Optical Engineering; vol.6406 >Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/ OCM
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Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/ OCM

机译：毛滴虫的流域规模分布。使用Oceans I / OCM在阿拉伯海航行

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摘要

Trichodesmium spp. is widely spread in the Arabian Sea. It form dense patches. During 2000-2005 (5 years period) extensive sampling was done in the Arabian Sea covering large area and different months starting from November to May. Three prominent sites are identified as Trichodesmium bloom sites in the Arabian Sea: 1) Lakshadweep waters 2) Off Goa and 3) Off Gujarat area. Bloom of around 100 km~2 area with 4 to 400737 filamentsL~(-1) concentrations are recorded. Two species of Trichodesmium are encountered based upon seasonality and environmental conditions. OCM derived chlorophyll a during bloom was as high as 0.5 to 1 mgm~(-3), at time increased upto 5 mgm~(-3) and depends upon number of filaments in water. The Trichodesmium features were identified at 869, 670, 555nm in OCM data. Trichodesmium was detected as stripes and eddies in OCM images. The bloom patches appear darker which is taken as measurement of spread of the bloom in water. Total 133 stations are covered during 5 years period out of which 63 stations showed presence of Trichodesmium with discolouration of water. In offshore water Trichodesmium was detected as early as November and continued upto April month whereas in the coastal water Trichodesmium prevailed from February to May. The seasonality of these blooms was observed with respect to inshore/offshore and two species of Trichodesmium is discussed with the help of OCM data processed for chlorophyll a during Trichodesmium growth period, at 3 identified sites in the Arabian Sea.
机译：Trichodesmium spp。在阿拉伯海广泛传播。它形成密集的斑块。在2000年至2005年（5年）中，从11月至5月在阿拉伯海进行了大范围的采样，覆盖了大面积区域和不同月份。在阿拉伯海中，三个突出的地点被确定为Trichodesmium开花地点：1）Lakshadweep水域2）Goa以外的地区和3）Gujarat以外的地区。记录了约100 km〜2区域的光华，其中有4至400737根细丝L〜（-1）浓度。根据季节和环境条件，会遇到两种毛线虫。水华时期OCM衍生的叶绿素a高达0.5到1 mgm〜（-3），有时增加到5 mgm〜（-3），并取决于水中的细丝数量。在OCM数据中，在869、670、555nm处鉴定了Trichodesmium特征。在OCM图像中检测到了Trichodesmium作为条纹和涡流。水华斑块显得较暗，这被视为水华在水中的扩散程度。在5年中，总共覆盖了133个站点，其中63个站点显示了毛滴虫的存在，并且水变色了。在海上水域中检测到毛滴虫，最早持续到11月，一直持续到4月，而在沿海水域，从2月至5月流行滴虫。在沿海/近海观察到这些花的季节性，并在阿拉伯海的3个确定地点，利用在毛线虫生长期间处理叶绿素a的OCM数据，讨论了两种毛线虫。

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