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Weakening warming on spring freeze-thaw cycle caused greening Earth's third pole.
- Source :
- Proceedings of the National Academy of Sciences of the United States of America; 2/20/2024, Vol. 121 Issue 8, p1-3, 16p
- Publication Year :
- 2024
-
Abstract
- The Tibetan Plateau, recognized as Earth's third pole and among the most responsive regions to climate shifts, profoundly influences regional and even global hydrological processes. Here, we discerned a significant weakening in the influence of temperature on the initiation of surface freeze-thaw cycle (the Start of Thawing, SOT), which can be ascribed to a multitude of climatic variables, with radiation emerging as the most pivotal factor. Additionally, we showed that the diminishing impact of warming on SOT yields amplified soil moisture within the root zone. This, in turn, fosters a greening third pole with increased leaf area index and solar-induced chlorophyll fluorescence. We further showed that current Earth system models failed to reproduce the linkage between weakened sensitivity and productivity under various shared socioeconomic pathways. Our findings highlight the dynamic shifts characterizing the influence of climate warming on spring freeze-thaw process and underscore the profound ecological implications of these changes in the context of future climate scenarios. [ABSTRACT FROM AUTHOR]
- Subjects :
- FREEZE-thaw cycles
SPRING
LEAF area index
GLOBAL warming
EARTH currents
ZONING
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 121
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 176171499
- Full Text :
- https://doi.org/10.1073/pnas.2319581121