Academic Journal
Improved simulation of Antarctic sea ice due to the radiative effects of falling snow
| العنوان: | Improved simulation of Antarctic sea ice due to the radiative effects of falling snow |
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| المؤلفون: | J-L F Li, Mark Richardson, Yulan Hong, Wei-Liang Lee, Yi-Hui Wang, Jia-Yuh Yu, Eric Fetzer, Graeme Stephens, Yinghui Liu |
| المصدر: | Environmental Research Letters, Vol 12, Iss 8, p 084010 (2017) |
| بيانات النشر: | IOP Publishing, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering LCC:Environmental sciences LCC:Science LCC:Physics |
| مصطلحات موضوعية: | GCM, sea ice concentration, precipitating ice, sea ice albedo, cloud radiation, CMIP5, Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350, Science, Physics, QC1-999 |
| الوصف: | Southern Ocean sea-ice cover exerts critical control on local albedo and Antarctic precipitation, but simulated Antarctic sea-ice concentration commonly disagrees with observations. Here we show that the radiative effects of precipitating ice (falling snow) contribute substantially to this discrepancy. Many models exclude these radiative effects, so they underestimate both shortwave albedo and downward longwave radiation. Using two simulations with the climate model CESM1, we show that including falling-snow radiative effects improves the simulations relative to cloud properties from CloudSat-CALIPSO, radiation from CERES-EBAF and sea-ice concentration from passive microwave sensors. From 50–70°S, the simulated sea-ice-area bias is reduced by 2.12 × 10 ^6 km ^2 (55%) in winter and by 1.17 × 10 ^6 km ^2 (39%) in summer, mainly because increased wintertime longwave heating restricts sea-ice growth and so reduces summer albedo. Improved Antarctic sea-ice simulations will increase confidence in projected Antarctic sea level contributions and changes in global warming driven by long-term changes in Southern Ocean feedbacks. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1748-9326 |
| Relation: | https://doaj.org/toc/1748-9326 |
| DOI: | 10.1088/1748-9326/aa7a17 |
| URL الوصول: | https://doaj.org/article/4248189a2b4b46aea9bc77a01ef8e74e |
| رقم الانضمام: | edsdoj.4248189a2b4b46aea9bc77a01ef8e74e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17489326 |
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| DOI: | 10.1088/1748-9326/aa7a17 |