Actual and insolation-weighted Northern Hemisphere snow cover and sea-ice between 1973-2002
Actual and insolation-weighted Northern Hemisphere snow cover and sea ice are binned by latitude bands for the years 1973-2002. Antarctic sea-ice is also analyzed for the years 1980-2002. The use of insolation weighting provides an improved estimate of the radiative feedbacks of snow cover and sea-i...
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| Veröffentlicht in: | Climate dynamics 2004-06, Vol.22 (6-7), p.591-595 |
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| container_issue | 6-7 |
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| container_title | Climate dynamics |
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| creator | PIELKE, R. A LISTON, G. E CHAPMAN, W. L ROBINSON, D. A |
| description | Actual and insolation-weighted Northern Hemisphere snow cover and sea ice are binned by latitude bands for the years 1973-2002. Antarctic sea-ice is also analyzed for the years 1980-2002. The use of insolation weighting provides an improved estimate of the radiative feedbacks of snow cover and sea-ice into the atmosphere. One conclusion of our assessment is that while a decrease in both areal and insolation-weighted values have occurred, the data does not show a monotonic decrease of either Arctic sea-ice or Northern Hemisphere snow cover. If Arctic perennial sea-ice is decreasing since the total reduction in areal coverage is relatively small, a large portion of it is being replenished each year such that its radiative feedback to the atmosphere is muted. Antarctic sea-ice areal cover shows no significant long-term trend, while there is a slight decrease in the insolation-weighted values for the period 1980-2002. From the early 1990s to 2001, there was a slight increase in both values. The comparison of general circulation model simulations of changes over the last several decades to observed changes in insolation-weighted sea-ice and snow cover should be a priority research topic. |
| doi_str_mv | 10.1007/s00382-004-0401-5 |
| format | Article |
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Antarctic sea-ice areal cover shows no significant long-term trend, while there is a slight decrease in the insolation-weighted values for the period 1980-2002. From the early 1990s to 2001, there was a slight increase in both values. The comparison of general circulation model simulations of changes over the last several decades to observed changes in insolation-weighted sea-ice and snow cover should be a priority research topic.</description><identifier>ISSN: 0930-7575</identifier><identifier>EISSN: 1432-0894</identifier><identifier>DOI: 10.1007/s00382-004-0401-5</identifier><identifier>CODEN: CLDYEM</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Atmosphere ; Climatology. Bioclimatology. 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One conclusion of our assessment is that while a decrease in both areal and insolation-weighted values have occurred, the data does not show a monotonic decrease of either Arctic sea-ice or Northern Hemisphere snow cover. If Arctic perennial sea-ice is decreasing since the total reduction in areal coverage is relatively small, a large portion of it is being replenished each year such that its radiative feedback to the atmosphere is muted. Antarctic sea-ice areal cover shows no significant long-term trend, while there is a slight decrease in the insolation-weighted values for the period 1980-2002. From the early 1990s to 2001, there was a slight increase in both values. 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| source | Springer Nature - Complete Springer Journals |
| subjects | Atmosphere Climatology. Bioclimatology. Climate change Earth, ocean, space Exact sciences and technology External geophysics General circulation models Global warming Marine Meteorology Sea ice Snow Snow cover |
| title | Actual and insolation-weighted Northern Hemisphere snow cover and sea-ice between 1973-2002 |
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