دورية أكاديمية
Permafrost Cloud Feedback May Amplify Climate Change
العنوان: | Permafrost Cloud Feedback May Amplify Climate Change |
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المؤلفون: | Philipp deVrese, Tobias Stacke, Veronika Gayler, Victor Brovkin |
المصدر: | Geophysical Research Letters, Vol 51, Iss 12, Pp n/a-n/a (2024) |
بيانات النشر: | Wiley, 2024. |
سنة النشر: | 2024 |
المجموعة: | LCC:Geophysics. Cosmic physics |
مصطلحات موضوعية: | permafrost, hydrology, clouds, climate change, Geophysics. Cosmic physics, QC801-809 |
الوصف: | Abstract Rising temperatures entail important changes in the soil hydrologic processes of the northern permafrost zone. Using the ICON‐Earth System Model, we show that a large‐scale thaw of essentially impervious frozen soil layers may cause a positive feedback by which permafrost degradation amplifies the causative warming. The thawing of the ground increases its hydraulic connectivity and raises drainage rates which facilitates a drying of the landscapes. This limits evapotranspiration and the formation of low‐altitude clouds during the snow‐free season. A decrease in summertime cloudiness, in turn, increases the shortwave radiation reaching the surface, hence, temperatures and advances the permafrost degradation. Our simulations further suggest that the consequences of a permafrost cloud feedback may not be limited to the regional scale. For a near‐complete loss of the high‐latitude permafrost, they show significant temperature impacts on all continents and northern‐hemisphere ocean basins that raise the global mean temperature by 0.25 K. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1944-8007 0094-8276 |
Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
DOI: | 10.1029/2024GL109034 |
URL الوصول: | https://doaj.org/article/c308ed57cc0b4165a677e30370128c3f |
رقم الأكسشن: | edsdoj.308ed57cc0b4165a677e30370128c3f |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 19448007 00948276 |
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DOI: | 10.1029/2024GL109034 |