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Analysis of merged SMMR-SSMI time series of Arctic and Antarctic sea ice parameters 1978-1995

Bergen Open Research Archive

Show simple item record Bjørgo, Einar Johannessen, Ola M. Miles, Martin W. 2005-08-24T08:52:19Z 2005-08-24T08:52:19Z 1997-02-15
dc.identifier.citation en
dc.identifier.issn 0094-8276
dc.description.abstract The most consistent means of investigating the global sea ice cover is by satellite passive microwave sensors, as these are independent of illumination and cloud cover. The Nimbus 7 Scanning Multichannel Microwave Radiometer (SMMR) and the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave Imager (SSMI) provide information on the global sea ice cover from 1978 to present. The two instruments flew simultaneously during a 6-week overlap period in July and August 1987, thus enabling intercomparison of the two sensors. Brightness temperatures are corrected for instrument drift and calibration differences in order to produce continuous time series of monthly averaged Arctic and Antarctic sea ice extent and sea ice area through the use of the NOrwegian Remote Sensing EXperiment (NORSEX) algorithm, which relates brightness temperatures to ice concentration. Statistical analysis on the time series estimates the decreases in Arctic ice extent and ice area to be 4.5% and 5.7%, respectively, during the 16.8-year observation period. The overall trends established here serve to better define and strengthen earlier assertions of a reduced ice cover, based on analysis of SMMR and SSMI data taken separately. These results are consistent with GCM simulations that suggest retreat of the sea ice cover under global warming scenarios. en
dc.format.extent 2101406 bytes
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher American Geophysical Union en
dc.relation.ispartofseries Geophysical Research Letters;24(4)
dc.subject Global change en
dc.subject Remote sensing en
dc.subject Instruments and techniques en
dc.subject Meteorology and atmospheric dynamics en
dc.subject Polar meteorology en
dc.subject Oceanography en
dc.subject Arctic en
dc.subject Antarctic en
dc.title Analysis of merged SMMR-SSMI time series of Arctic and Antarctic sea ice parameters 1978-1995 en
dc.type Journal article en
dc.type Peer reviewed en

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