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Summer heat wave in 2022 led to rapid warming of permafrost in the central Qinghai-Tibet Plateau
- Source :
- npj Climate and Atmospheric Science, Vol 7, Iss 1, Pp 1-15 (2024)
- Publication Year :
- 2024
- Publisher :
- Nature Portfolio, 2024.
-
Abstract
- Abstract Extreme events with increasing frequency and intensity are significantly affecting the permafrost environment. Analysis using the ERA5-Land reanalysis data revealed that the permafrost region of the central Qinghai-Tibet Plateau (QTP) experienced the summer heat wave in 2022. Four active layer sites experienced maximum active layer thicknesses (ALT) in 2022 (mean: 207.7 cm), which was 20% higher than the mean ALT during 2000–2021 (mean: 175.9 cm). The mean annual ground temperature (MAGT) observed in 2022 was also the highest, exceeding the average of the previous years by 10%. The contribution fraction of heat wave to the seasonal thaw depth of active layer was quantified using Stefan model with ranging from 6.6% to 13.6%, and the maximum contribution fraction occurs in 2022. These findings are helpful to better understand the impact processes of extreme events on the active layer and permafrost.
- Subjects :
- Environmental sciences
GE1-350
Meteorology. Climatology
QC851-999
Subjects
Details
- Language :
- English
- ISSN :
- 23973722
- Volume :
- 7
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- npj Climate and Atmospheric Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.3b9557a060bb4839876795687701e3ae
- Document Type :
- article
- Full Text :
- https://doi.org/10.1038/s41612-024-00765-4