风云三号卫星MERSI影像提取北极海冰参数的方法

风云三号卫星MERSI影像的空间分辨率达到250 m,不仅可以长期宏观监测海冰整体分布变化,而且能够观测分析破碎冰块的面积、圆度等细节形态特征.从海冰光谱特征和冰块灰度分布特征出发,给出MERSI影像提取海冰整体分布参数和冰块形态参数方法,包括海冰识别、冰块分离提取以及海冰参数提取,利用这些方法成功提取了2014年夏季弗拉姆海峡海冰边缘区的海冰细节信息.给出的方法可为研究分析北极海冰变化及海气相互作用提供方法支持和信息保障.

A method to extract parameters of Arctic sea ice from FY-3/MERSI imagery

With high spatial resolution of 250 m, MERSI images obtained from FY-3 satellite not only reveals information about the long term distribution of sea ice in large scale, but also contains information about its detailed shape characteristics, such as ice block area and roundness. Based on the spectral feature of sea ice and gray distribution feature of ice block, an integral method and process for extracting the macroscopic sea ice distribution and detail ice block shape parameters was proposed in this paper. This method consisted of sea ice recognition, ice block detection and sea ice parameters extraction. In the summer of 2014, the detail sea ice information of the marginal ice zone in the Fram Strait was extracted accurately by using the proposed method. And consequently this method can provide methodological support and information security for the study on the change of Arctic sea ice and interaction between atmosphere and ocean.