The complex dielectric constant measurement of sea ice in the 6-18GHz

The sea ice extent most shrunk in Sep, 2012 since 1978. The long term change of sea ice extent in northern hemisphere has been measured active and passive microwave sensor insusceptible to polar night and weather. An understanding of microwave radiometric and radar signatures of sea ice is dependent on knowledge of the complex dielectric constant of the sea ice. The complex dielectric constant has long been observed or simulated in mainly low-frequency band. For verification of satellite data, the dielectric constant of the currently observed band is important. The purpose of this study is to obtain the dielectric constant of the Advanced Microwave Scanning Radiometer 2 (AMSR2) frequency on sea ice. We report the complex dielectric constant of sea ice data at 6 - 18GHz taken in the Saroma lagoon. Measurements were taken on Saroma lagoon near Sea of Okhotsk in February 2013. The complex dielectric constant was measured using the probe method. Surface temperature and sea ice samples were also taken at the measurement points. The sea ice surface temperature at the measurement start (10:58 LT) was -5.3 deg C, and at the end of measurement (12:33 LT) was -4.9 deg C. The real part and imaginary part of pure ice are almost constant in 6 to 18GHz. However, brine has frequency dependency. Measured value is distributed between pure ice and brine, the influence of brine with frequency dependency may be appearing.