NASA MODIS海冰产品评价分析——以辽东湾海冰监测为例

摘要

NASA开发的MODIS海冰产品可提供全球范围的海冰分布和冰表温度信息,但将其直接用于局地和区域海冰监测时,其精度还有待进一步验证.以辽东湾冬季海冰监测为例,对MODIS海冰产品进行了分析,发现该产品将区域内绝大部分海冰标识为云.根据NASA的海冰算法,利用反射率和冰表温度(Ice Surface Temperature,IST)数据对海冰范围进行提取,结果表明,利用IST可以有效提取海冰分布信息.%NASA MODIS sea ice products provide global information of sea ice extent and ice surface temperature (IST). However, when it is used for local and regional sea ice mapping, its accuracy needs further validation.Taking sea ice in Liaodong Bay as an example, the author analyzed MODIS sea ice products, and the result shows that almost all the sea ices in this area are identified as clouds. Based on NASA sea ice algorithm, the author extracted sea ice extent by using sea ice reflectance and ice surface temperature respectively. The results show that ice surface temperature can extract the distribution of sea ice effectively.