Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective
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 alp...
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ftdoajarticles:oai:doaj.org/article:c11601e245a84b7eab841e584eb7db6d 2023-05-15T17:56:12+02:00 Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective Jianan Hu Zhuotong Nan Hailong Ji 2022-02-01T00:00:00Z https://doi.org/10.3389/feart.2022.838558 https://doaj.org/article/c11601e245a84b7eab841e584eb7db6d EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2022.838558/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.838558 https://doaj.org/article/c11601e245a84b7eab841e584eb7db6d Frontiers in Earth Science, Vol 10 (2022) net primary productivity (NPP) NOAH-MP permafrost seasonally frozen ground three-river headwaters region Science Q article 2022 ftdoajarticles https://doi.org/10.3389/feart.2022.838558 2022-12-31T03:35:01Z 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. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Frontiers in Earth Science 10 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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net primary productivity (NPP) NOAH-MP permafrost seasonally frozen ground three-river headwaters region Science Q |
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net primary productivity (NPP) NOAH-MP permafrost seasonally frozen ground three-river headwaters region Science Q Jianan Hu Zhuotong Nan Hailong Ji Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
topic_facet |
net primary productivity (NPP) NOAH-MP permafrost seasonally frozen ground three-river headwaters region Science Q |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Jianan Hu Zhuotong Nan Hailong Ji |
author_facet |
Jianan Hu Zhuotong Nan Hailong Ji |
author_sort |
Jianan Hu |
title |
Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
title_short |
Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
title_full |
Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
title_fullStr |
Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
title_full_unstemmed |
Spatiotemporal Characteristics of NPP Changes in Frozen Ground Areas of the Three-River Headwaters Region, China: A Regional Modeling Perspective |
title_sort |
spatiotemporal characteristics of npp changes in frozen ground areas of the three-river headwaters region, china: a regional modeling perspective |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.838558 https://doaj.org/article/c11601e245a84b7eab841e584eb7db6d |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Frontiers in Earth Science, Vol 10 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2022.838558/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.838558 https://doaj.org/article/c11601e245a84b7eab841e584eb7db6d |
op_doi |
https://doi.org/10.3389/feart.2022.838558 |
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Frontiers in Earth Science |
container_volume |
10 |
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