COMPARISON BETWEEN BRIGHTNESS TEMPERATURE AND REFLECTIVITY TO THICKNESS OF SEA-ICE

• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: KEY WORDS; Sea-ice; Brightness temperature; thickness; reflectance; AMSR-E ABSTRACT; Arctic; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.221.8029; http://www.isprs.org/proceedings/XXXVIII/part8/pdf/W10C2_20100312205348.pdf

Sea ice is an essential component of the global climate system since it influences and is influenced by changes and variations in the global energy balance and water cycle. In the context of decreasing SIE over the Arctic and an increasing area covered by the seasonal ice, spatial and temporal variations in thin ice especially its thickness are important research questions. The brightness temperature characteristic to thickness is important because it estimates from the brightness temperature. And the verification of the estimated result is also important. However, the observation of thin sea ice is difficult. Therefore, the comparison with other data is important. The reflectivity of visible and near-infrared has a low characteristic in the thin sea ice area. The purpose of this study clarified the brightness temperature characteristic of sea ice, and compared the relations between reflectivity and the brightness temperature of the sea ice. The compared data is a brightness temperature from AMSR-E and reflectivity from MOIDS. The analysis converted the projection of both data into the same polar stereographic. And, the clear regions were chosen from the cloud flag and compared. The analytical result on January 15, 2003 is reported. The pixel of reflectivity 0.2-0.3 of MODIS band 1 was distributed about 80 % in brightness temperature of 185-190K. And the pixel of reflectivity 0.2 of MODIS band 2 was distributed about 80 % in