Arctic Sea Ice Volume Variability over 1901–2010: A Model-Based Reconstruction
| العنوان: | Arctic Sea Ice Volume Variability over 1901–2010: A Model-Based Reconstruction |
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| المؤلفون: | Kevin R. Wood, Axel Schweiger, Jinlun Zhang |
| المصدر: | Journal of Climate. 32:4731-4752 |
| بيانات النشر: | American Meteorological Society, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Atmospheric Science, geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Ocean modeling, Forcing (mathematics), 010502 geochemistry & geophysics, 01 natural sciences, Arctic ice pack, Atmosphere, Arctic, Volume (thermodynamics), Climatology, Sea ice, Environmental science, 0105 earth and related environmental sciences |
| الوصف: | PIOMAS-20C, an Arctic sea ice reconstruction for 1901–2010, is produced by forcing the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) with ERA-20C atmospheric data. ERA-20C performance over Arctic sea ice is assessed by comparisons with measurements and data from other reanalyses. ERA-20C performs similarly with respect to the annual cycle of downwelling radiation, air temperature, and wind speed compared to reanalyses with more extensive data assimilation such as ERA-Interim and MERRA. PIOMAS-20C sea ice thickness and volume are then compared with in situ and aircraft remote sensing observations for the period of ~1950–2010. Error statistics are similar to those for PIOMAS. We compare the magnitude and patterns of sea ice variability between the first half of the twentieth century (1901–40) and the more recent period (1980–2010), both marked by sea ice decline in the Arctic. The first period contains the so-called early-twentieth-century warming (ETCW; ~1920–40) during which the Atlantic sector saw a significant decline in sea ice volume, but the Pacific sector did not. The sea ice decline over the 1979–2010 period is pan-Arctic and 6 times larger than the net decline during the 1901–40 period. Sea ice volume trends reconstructed solely from surface temperature anomalies are smaller than PIOMAS-20C, suggesting that mechanisms other than warming, such as changes in ice motion and deformation, played a significant role in determining sea ice volume trends during both periods. |
| تدمد: | 1520-0442 0894-8755 |
| DOI: | 10.1175/jcli-d-19-0008.1 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::89bdd550bf2de40de7b8c62149f3967e https://doi.org/10.1175/jcli-d-19-0008.1 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........89bdd550bf2de40de7b8c62149f3967e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15200442 08948755 |
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| DOI: | 10.1175/jcli-d-19-0008.1 |