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• W4212901759 abstract "Permafrost degradation triggered by climate warming can disturb alpine ecosystem stability and further influence net primary productivity (NPP). Known as the “water tower of China”, the Three-River Headwaters Region (TRHR) on the eastern Qinghai-Tibet plateau (QTP), is characterized by a fragile alpine meadow ecosystem underlain by large areas of unstable permafrost and has been subject to rapid climate change in recent decades. Despite some site-specific studies, the spatial and temporal changes in NPP in the different frozen ground zones across the TRHR associated with climate change remain poorly understood. In this study, a physically explicit Noah land surface model with multi-parameterization options (Noah-MP) was employed to simulate NPP changes on the TRHR during 1989–2018. The simulation was performed with a spatial resolution of 0.1° and a temporal resolution of 3h, and validated at two sites with meteorological and flux observations. The results show that the average NPP was estimated to be 299.7 g C m −2 yr −1 in the seasonally frozen ground (SFG) zone and 198.5 g C m −2 yr −1 in the permafrost zone. NPP in the TRHR increased at a rate of 1.09 g C m −2 yr −2 during 1989–2018, increasing in 1989–2003 and then decreasing in subsequent years. The NPP in permafrost area increased at a rate of 1.43 g C m −2 yr −2 during 1989–2018, which is much higher than the rate of change in NPP in the SFG area (0.67 g C m −2 yr −2 ). Permafrost degradation has complicated ecosystem implications. In areas where permafrost degradation has occurred, both increasing and decreasing changes in NPP have been observed." @default.
• W4212901759 created "2022-02-24" @default.
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• W4212901759 date "2022-02-14" @default.
• W4212901759 modified "2023-10-18" @default.
• W4212901759 title "Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective" @default.
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• W4212901759 doi "https://doi.org/10.3389/feart.2022.838558" @default.
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