Title :
A microwave technique for mapping ice temperature in the Arctic seasonal sea ice zone
Author :
Germain, Karen M St ; Cavalieri, Donald J.
Author_Institution :
Remote Sensing Div., Naval Res. Lab., Washington, DC, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
A technique for deriving ice temperature in the Arctic seasonal sea ice zone from passive microwave radiances has been developed. The algorithm operates on brightness temperatures derived from the Special Sensor Microwave/Imager (SSM/I) and uses ice concentration and type from a previously developed thin ice algorithm to estimate the surface emissivity. Comparisons of the microwave derived temperatures with estimates derived from infrared imagery of the Bering Strait yield a correlation coefficient of 0.93 and an RMS difference of 2.1 K when coastal and cloud contaminated pixels are removed. SSM/I temperatures were also compared with a time series of air temperature observation from Gambell on St. Lawrence Island and from Point Barrow, AK weather stations. These comparisons indicate that the relationship between the air temperature and the ice temperature depends on ice type
Keywords :
atmospheric boundary layer; atmospheric techniques; atmospheric temperature; microwave measurement; millimetre wave measurement; oceanographic techniques; radiometry; remote sensing; sea ice; Alaska; Arctic Ocean; Bering Sea; Bering Strait; EHF; Gambell; Point Barrow; SHF; SSM/I; Special Sensor Microwave/Imager; USA; United States; air temperature; algorithm; boundary layer; brightness temperature; measurement technique; microwave radiometry; millimetre wave radiometry; mm wave; ocean; passive microwave radiance; polar atmosphere; satellite remote sensing; seasonal sea ice zone; temperature; thermal structure; Arctic; Brightness temperature; Image sensors; Microwave sensors; Microwave theory and techniques; Ocean temperature; Sea ice; Sea surface; Temperature dependence; Temperature sensors;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
