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Assessing the upper...
Assessing the upper elevational limits of vegetation growth in global high-mountains
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- Zou, Linqing (author)
- Wuhan University
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- Tian, Feng (author)
- Wuhan University
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- Liang, Tianchen (author)
- Wuhan University
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- Eklundh, Lars (author)
- Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,MERGE: ModElling the Regional and Global Earth system,Institutionen för naturgeografi och ekosystemvetenskap,LU profilområde: Naturbaserade framtidslösningar,Lunds universitets profilområden,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,LU Profile Area: Nature-based future solutions,Lund University Profile areas
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- Tong, Xiaoye (author)
- University of Copenhagen: Department of Geosciences and Natural Resource Management
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- Tagesson, Torbern (author)
- Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,University of Copenhagen: Department of Geosciences and Natural Resource Management
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- Dou, Yujie (author)
- Wuhan University
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- He, Tao (author)
- Wuhan University
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- Liang, Shunlin (author)
- University of Hong Kong
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- Fensholt, Rasmus (author)
- University of Copenhagen: Department of Geosciences and Natural Resource Management
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(creator_code:org_t)
- Elsevier BV, 2023
- 2023
- English.
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In: Remote Sensing of Environment. - : Elsevier BV. - 0034-4257. ; 286
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
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- The upper elevational limits of vegetation growth in global high-mountains have been the focus for monitoring and assessment of climate change impacts on terrestrial ecosystems. However, existing studies have relied on field surveys that do not allow for large-scale analysis. Although remote sensing data have been used for local and regional monitoring of the vegetation upper boundaries, a global synthesis of the treeline and vegetation line (the upper altitudinal threshold for the existence of trees and the transition line from vegetation to bare land or permanent snow cover, respectively) in high-mountain ecosystems is still missing. To fill this gap, we developed two independent methods based on (1) the relationship between a Sentinel-2 vegetation index and elevation and (2) the European Space Agency's 10 m resolution land cover dataset (WorldCover), respectively, to automatically identify the upper elevational limits of treeline and vegetation line for each one-quarter degree grid across the global high-mountain areas. We obtained highly consistent results from the two methods, both of which are spatially consistent with ground surveyed treeline elevations. Our results are in line with the current understanding of the global distributions of tree and vegetation lines, which are observed at the highest elevations in the Tibetan plateau and decreasing for increasing latitudes. We find that the tree and vegetation lines are aspect-dependent, reaching higher elevations on the equatorial-facing slopes than on the polar-facing slopes in high latitudes, and the opposite in the middle latitudes. Our analysis shows that mountain height is the dominant factor in determining the upper elevational limits of tree and vegetation lines across the globe, while climatic conditions and soil properties also play important roles at regional scales. Our study provides a framework for monitoring the tree and vegetation lines in global high-mountains and provides an important benchmark for further examining their long-term changes in response to climate change.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- High mountains
- Sentinel-2
- Treeline
- Upper elevational limits
- Vegetation line
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Zou, Linqing
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Tian, Feng
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Liang, Tianchen
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Eklundh, Lars
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Tong, Xiaoye
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Tagesson, Torber ...
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show more...
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Dou, Yujie
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He, Tao
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Liang, Shunlin
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Fensholt, Rasmus
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Physical Geograp ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
- Articles in the publication
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Remote Sensing o ...
- By the university
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Lund University