In:
Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 126, No. 17 ( 2021-09-16)
Abstract:
Under the influences of frequent extreme warming events with short duration and high intensity, how much is the impact on seasonally thawing process of active layer? Until now, it remains unclear, and some models related to permafrost exist the knowledge gap in describing the physical mechanism scheme for the impacts. Here, we selected the Tanggula permafrost region of Qinghai‐Tibet Plateau, and used in situ meteorological and active layer hydrothermal data to investigate it. Our results showed that the average contribution rates of extreme warming events to thawing depth was 13.5% ± 4.9% from April to October. Higher contribution rates occurred in the initial and final stages of thawing process. In addition, the active layer thawing process mainly controlled its thermal responses to extreme warming events. Moreover, the inter‐annual differences of active layer thermal conditions during thawing period was likely related to the inter‐annual differences of extreme warming events in frequency and intensity. These results will contribute to understand the influence mechanism of extreme warming events on the active layer thawing process, which can provide useful references for further improving models from the perspective of extreme events.
Type of Medium:
Online Resource
ISSN:
2169-897X
,
2169-8996
DOI:
10.1029/2021JD035088
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2021
detail.hit.zdb_id:
710256-2
detail.hit.zdb_id:
2016800-7
detail.hit.zdb_id:
2969341-X
SSG:
16,13
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