Estimation of sea ice thickness in the Bohai Sea using a combination of VIS/NIR and SAR images

被引：22
|
作者：
Liu, Chengyu [1 ,2 ]
Chao, Jinlong [1 ]
Gu, Wei [1 ]
Xu, Yingjun [1 ]
Xie, Feng [2 ]
机构：
[1] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Spatial Act Optoelect Tech, Shanghai 200083, Peoples R China
来源：
GISCIENCE & REMOTE SENSING | 2015年 / 52卷 / 02期
基金：
国家高技术研究发展计划(863计划);
关键词：
VIS/NIR; Bohai Sea; sea ice; empirical model; SAR; RADAR DATA; CHINA; MODEL; REFLECTANCE;
D O I：
10.1080/15481603.2015.1007777
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
The thicknesses of level and rough sea ice in the Bohai Sea were estimated, using Huan Jing-1 (HJ-1) charge-coupled device (CCD) images and environmental satellite (ENVISAT) advanced synthetic aperture radar (ASAR) images, respectively. Two empirical models were developed, one to describe the relationship between the reflectance of visible/near-infrared (VIS/NIR) imagery and level ice thickness and one to describe the relationship between the backscattering coefficient of synthetic aperture radar (SAR) imagery and rough ice thickness. The results showed that the VIS/NIR images were more suitable for distinguishing sea ice from sea water, and the active microwave remote sensing images were suitable for determining the difference between level and rough sea ice. The thickness of the level sea ice was logarithmically related to the VIS/NIR reflectance, and the R-2 value of the fitted curve was 0.99 with a root mean square error (RMSE) of 1.0cm. In contrast, the thickness of the rough sea ice was exponentially related to the SAR backscattering coefficient, and the R-2 value of the fitted curve was 0.90 with an RMSE of 2.3cm. The thicknesses of level and rough sea ice were then calculated using the empirical models, and the results reflected the thickness distribution of sea ice in the Bohai Sea. We concluded that high-resolution images can accurately extract the sea ice area and estimate the thickness of sea ice.
引用
收藏
页码：115 / 130
页数：16
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