Remote sensing of the southern ocean by MERIS, MODIS, SeaWiFS and ENEA Lidar
Remote sensing of the southern ocean by MERIS, MODIS, SeaWiFS and ENEA Lidar
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MERIS、MODIS、SeaWiFS 和 ENEA 激光雷达对南大洋进行遥感
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. Palucci
中科院分区：
文献类型：
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作者：
L. Fiorani;I. Okladnikov;A. Palucci
海洋浮游植物在气候调节中起着重要作用。这就解释了国际上在空间监测叶绿素a浓度方面所作的努力，叶绿素a浓度是藻类生物量的主要指标。在这项研究中，三个辐射计（MERIS，MODIS和SeaWiFS），搭载卫星，和ENEA激光雷达，船上，相互比较。观测到辐射计之间存在重大差异。特别是，MERIS与MODIS和SeaWiFS的距离可达100%。如果用ENEA激光雷达校准MERIS，这种差异减小到约35%。这些结果证实，不可避免地需要精确测量靠近海面的叶绿素a浓度。此外，它表明，卫星辐射计的区域校准导致更准确的估计海洋浮游植物。
Oceanic phytoplankton plays a major role in climate regulation. This explains the international efforts in space monitoring of chlorophyll-a concentration, i.e. the main indicator of algal biomass. In this study three radiometers (MERIS, MODIS and SeaWiFS), aboard satellites, and the ENEA lidar, aboard a ship, are intercompared. Important discrepancies among the radiometers have been observed. In particular, MERIS can be up to 100% apart from MODIS and SeaWiFS. This difference reduces to about 35% if MERIS is calibrated with the ENEA lidar. Those results confirm the unavoidable need of precise measurements of chlorophyll-a concentration in close proximity to the sea surface. Moreover, it is demonstrated that regional calibrations of satellite radiometers lead to more accurate estimates of oceanic phytoplankton.