极地研究

极地研究 ›› 2009, Vol. 21 ›› Issue (3): 186-196.

• 研究论文 • 上一篇    下一篇

应用AMSR-E 89GHz遥感数据反演北极多年冰密集度

  

  1. 中国海洋大学海洋环境学院; 德国不莱梅大学环境物理学院; 芬兰气象研究所
  • 出版日期:2009-09-30 发布日期:2009-09-30
  • 通讯作者: 程斌
  • 基金资助:

    欧盟DAMOCLES项目第6个框架计划(018509-DAMOCLES)资助

ARCTIC MULTIYEAR ICE CONCENTRATION RETRIEVAL BASED ON AMSR-E 89 GHz DATA

  1. 1College of Physical and Environmental Oceanography; Ocean University of China; Qingdao 266100; China; 2Institute of Environmental Physics; University of Bremen; 28359 Bremen; Germany; 3Finnish Meteorological Institute; FI-00101 Helsinki; Finland
  • Online:2009-09-30 Published:2009-09-30

PDF (PC)

2127

被引次数

17

摘要：

被动微波辐射计AMSR-E在89GHz频段的空间分辨率几乎是其它低频段的2倍。到目前为止,已经有成熟的算法采用AMSR-E 89GHz频段的数据来反演整体海冰的密集度,而本文根据89GHz频段亮温数据针对一年冰、多年冰以及无冰水面的不同特性,提出了一种反演多年冰密集度的方法(AC)。计算了2007年北极的整体海冰和多年冰密集度,并与NASA TEAM算法(NT)的结果作了比较。对于整体海冰密集度,两种算法反演的结果基本一致。从日平均上来看,AC算法得到的整体海冰覆盖面积只比NT算法多25万km2。但是对于多年冰的反演结果,AC算法得到的结果比NT的结果要多出146万km2,冬季差别尤其大。造成这种差别的原因可能是AC算法对于北极表面气温的变化比较敏感。另外,AC算法计算得到2007年最大海冰覆盖面积为1400万km2,最小海冰覆盖面积为400万km2,这与其它研究结果一致。

关键词: AMSR-E, 北极, 多年冰, 亮温, 遥感, AMSR-E, 北极, 多年冰, 亮温, 遥感

Abstract:

The 89 GHz channels of the passive microwave sensor AMSR-E have more than twice the horizontal resolution of its other lower frequency channels. The retrieval of total ice concentration based on the 89 GHz channels was well established,while retrieval of the multiyear ice concentration was little explored until now. The brightness temperatures of the AMSR-E 89 GHz channels are used to characterize their response to multiyear ice,first-year ice and open water. A simple algorithm,called Algorithm Currently (A...

Key words: AMSR-E, Arctic, multiyear ice, brightness temperature, microwave remote sensing