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Permafrost Cloud Feedback May Amplify Climate Change

التفاصيل البيبلوغرافية
العنوان: Permafrost Cloud Feedback May Amplify Climate Change
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
الوصف
تدمد:19448007
00948276
DOI:10.1029/2024GL109034