TEMPORAL VARIATIONS OF PASSIVE MICROWAVES FROM THE ICE SHEET
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概要
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This study investigates seasonal variations and spatial differences in passive microwave signals (DMSP SSM/I) from the ice sheet. The time series of brightness temperature (Tb) at 19 GHz and 37GHz, their gradient ratio (GR : 37 GHz minus 19 GHz) and polarization at each frequency were analyzed. Tb does not reflect simply the air temperature, but it reflects the GR value. The lowest GR is observed in the ridge area of East Antarctica. GR alters its sign with season, that is, it is positive in summer and negative in winter; lower frequency indicates the temperature of the deeper snow layer. However, GR in the ridge area shows negative values throughout the year. Results of the polarization also show distinct seasonal changes between the ridge area and the lower part of the ice sheet. It is concluded that there is high variability of microwave signals along the traverse route between Syowa Station and Dome Fuji Station, which may imply that altitudinal variations of snow characteristics are large in this region.
- 国立極地研究所の論文
著者
関連論文
- Deep ice core drilling to 2503m depth at Dome Fuji, Antarctica
- Meteorological observations along a traverse route from coast to Dome Fuji Station, Antarctica, recorded by Automatic Weather Stations in 1995
- A preliminary study of ice core chronology at Dome Fuji Station, Antarctica
- Automatic Weather Station（AWS）data collected by the 33rd to 42nd Japanese Antarctic Research Expeditions during 1993-2001
- Meteorological Data Report at Chaivo, Northern Sakhalin, September 2000 - November 2001
- Meteorological Observations at Schmidt, Northern Sakhalin, August 1995 - August 1998
- Longitudinal variations of temperature, wind and ablation in Broeggerbreen, Svalbard (scientific paper)
- INTERANNUAL VARIABILITY OF SEA ICE CONDITIONS IN SYOWA STATION SECTOR DEDUCED FROM DMSP SSM/I DATA
- DATA-LOGGING AUTOMATIC WEATHER STATION ALONG THE TRAVERSE ROUTE FROM SYOWA STATION TO DOME FUJI
- Meteorological Data Report at Chaivo, Northern Sakhalin, November 2003 - October 2004
- Meteorological Data Report at Chaivo, Northern Sakhalin, October 2002 - November 2003
- Meteorological Data Report at Chaivo, northern Sakhalin, November 2001 - October 2002
- Glaciological Data Collected by the 34th Japanese Antarctic Research Expedition in 1993
- Glaciological data collected by the 34th Japanese Antactic Research Expedition in 1993(Glaciology 23)
- Satellite observation of melting and break-up of fast ice in Lutzow-Holm Bay, East Antarctica
- TESTS OF WIND POWER GENERATOR AND SOLAR BATTERY IN THE INLAND AREAS OF ANTARCTICA
- METEOROLOGICAL OBSERVATIONS BY DATA-LOGGING AUTOMATIC WEATHER STATION AT DOME FUJI STATION
- OBSERVATIONS ON THE EVAPORATION-CONDENSATION PROCESS AND HEAT-BALANCE DURING THE AUSTRAL SUMMER AT THE SNOW SURFACE OF DOME FUJI STATION, EAST ANTARCTICA
- Behavior of water in the Brogger Glacier, Spitsbergen (abstract)
- Characteristics of temperature fluctuation in Svalbard, in the Arctic (abstract)
- Preliminary discussion of physical properties of the Dome Fuji shallow ice core in 1993, Antarctica
- FLUCTUATIONS OF SEA ICE EXTENT IN THE ANTARCTIC
- TIDAL DISPLACEMENT OF SEA ICE OBSERVED AT NISI-NO-URA COVE ON EAST ONGUL ISLAND, ANTARCTICA
- OPEN WATER AND THE CIRCUMPOLAR TROUGH IN THE ANTARCTIC
- Preliminary study of the transition of sea ice during the melting process
- RECENT SATELLITE OBSERVATIONS AT SYOWA STATION, ANTARCTICA
- OBSERVATION OF SEA ICE CONDITIONS USING VISIBLE AND NEAR-INFRARED CHANNELS IN MOS-1/MESSR AND ADEOS/AVNIR
- TEMPORAL AND SPATIAL FLUCTUATIONS OF WARMING IN ANTARCTICA AND THE ATMOSPHERIC CIRCULATION
- INTERANNUAL FLUCTUATIONS OF SEA ICE EXTENT IN THE ANTARCTIC AND ASSOCIATED ATMOSPHERIC CONDITIONS
- TEMPORAL VARIATIONS OF PASSIVE MICROWAVES FROM THE ICE SHEET