Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA
The Arctic is currently undergoing intense changes in climate; vegetation composition and productivity are expected to respond to such changes. To understand the impacts of climate change on the function of Arctic tundra ecosystems within the global carbon cycle, it is crucial to improve the underst...
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ftdoajarticles:oai:doaj.org/article:b0b2f644e9e64b4494689179cba4814e 2023-05-15T14:46:08+02:00 Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA Scott J. Davidson Maria J. Santos Victoria L. Sloan Jennifer D. Watts Gareth K. Phoenix Walter C. Oechel Donatella Zona 2016-11-01T00:00:00Z https://doi.org/10.3390/rs8120978 https://doaj.org/article/b0b2f644e9e64b4494689179cba4814e EN eng MDPI AG http://www.mdpi.com/2072-4292/8/12/978 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8120978 https://doaj.org/article/b0b2f644e9e64b4494689179cba4814e Remote Sensing, Vol 8, Iss 12, p 978 (2016) Arctic tundra vegetation communities linear discriminant analysis field spectroscopy Alaska Science Q article 2016 ftdoajarticles https://doi.org/10.3390/rs8120978 2022-12-31T15:16:44Z The Arctic is currently undergoing intense changes in climate; vegetation composition and productivity are expected to respond to such changes. To understand the impacts of climate change on the function of Arctic tundra ecosystems within the global carbon cycle, it is crucial to improve the understanding of vegetation distribution and heterogeneity at multiple scales. Information detailing the fine-scale spatial distribution of tundra communities provided by high resolution vegetation mapping, is needed to understand the relative contributions of and relationships between single vegetation community measurements of greenhouse gas fluxes (e.g., ~1 m chamber flux) and those encompassing multiple vegetation communities (e.g., ~300 m eddy covariance measurements). The objectives of this study were: (1) to determine whether dominant Arctic tundra vegetation communities found in different locations are spectrally distinct and distinguishable using field spectroscopy methods; and (2) to test which combination of raw reflectance and vegetation indices retrieved from field and satellite data resulted in accurate vegetation maps and whether these were transferable across locations to develop a systematic method to map dominant vegetation communities within larger eddy covariance tower footprints distributed along a 300 km transect in northern Alaska. We showed vegetation community separability primarily in the 450–510 nm, 630–690 nm and 705–745 nm regions of the spectrum with the field spectroscopy data. This is line with the different traits of these arctic tundra communities, with the drier, often non-vascular plant dominated communities having much higher reflectance in the 450–510 nm and 630–690 nm regions due to the lack of photosynthetic material, whereas the low reflectance values of the vascular plant dominated communities highlight the strong light absorption found here. High classification accuracies of 92% to 96% were achieved using linear discriminant analysis with raw and rescaled spectroscopy reflectance ... Article in Journal/Newspaper Arctic Climate change Tundra Alaska Directory of Open Access Journals: DOAJ Articles Arctic Remote Sensing 8 12 978 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic tundra vegetation communities linear discriminant analysis field spectroscopy Alaska Science Q |
spellingShingle |
Arctic tundra vegetation communities linear discriminant analysis field spectroscopy Alaska Science Q Scott J. Davidson Maria J. Santos Victoria L. Sloan Jennifer D. Watts Gareth K. Phoenix Walter C. Oechel Donatella Zona Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
topic_facet |
Arctic tundra vegetation communities linear discriminant analysis field spectroscopy Alaska Science Q |
description |
The Arctic is currently undergoing intense changes in climate; vegetation composition and productivity are expected to respond to such changes. To understand the impacts of climate change on the function of Arctic tundra ecosystems within the global carbon cycle, it is crucial to improve the understanding of vegetation distribution and heterogeneity at multiple scales. Information detailing the fine-scale spatial distribution of tundra communities provided by high resolution vegetation mapping, is needed to understand the relative contributions of and relationships between single vegetation community measurements of greenhouse gas fluxes (e.g., ~1 m chamber flux) and those encompassing multiple vegetation communities (e.g., ~300 m eddy covariance measurements). The objectives of this study were: (1) to determine whether dominant Arctic tundra vegetation communities found in different locations are spectrally distinct and distinguishable using field spectroscopy methods; and (2) to test which combination of raw reflectance and vegetation indices retrieved from field and satellite data resulted in accurate vegetation maps and whether these were transferable across locations to develop a systematic method to map dominant vegetation communities within larger eddy covariance tower footprints distributed along a 300 km transect in northern Alaska. We showed vegetation community separability primarily in the 450–510 nm, 630–690 nm and 705–745 nm regions of the spectrum with the field spectroscopy data. This is line with the different traits of these arctic tundra communities, with the drier, often non-vascular plant dominated communities having much higher reflectance in the 450–510 nm and 630–690 nm regions due to the lack of photosynthetic material, whereas the low reflectance values of the vascular plant dominated communities highlight the strong light absorption found here. High classification accuracies of 92% to 96% were achieved using linear discriminant analysis with raw and rescaled spectroscopy reflectance ... |
format |
Article in Journal/Newspaper |
author |
Scott J. Davidson Maria J. Santos Victoria L. Sloan Jennifer D. Watts Gareth K. Phoenix Walter C. Oechel Donatella Zona |
author_facet |
Scott J. Davidson Maria J. Santos Victoria L. Sloan Jennifer D. Watts Gareth K. Phoenix Walter C. Oechel Donatella Zona |
author_sort |
Scott J. Davidson |
title |
Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
title_short |
Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
title_full |
Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
title_fullStr |
Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
title_full_unstemmed |
Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA |
title_sort |
mapping arctic tundra vegetation communities using field spectroscopy and multispectral satellite data in north alaska, usa |
publisher |
MDPI AG |
publishDate |
2016 |
url |
https://doi.org/10.3390/rs8120978 https://doaj.org/article/b0b2f644e9e64b4494689179cba4814e |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra Alaska |
genre_facet |
Arctic Climate change Tundra Alaska |
op_source |
Remote Sensing, Vol 8, Iss 12, p 978 (2016) |
op_relation |
http://www.mdpi.com/2072-4292/8/12/978 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs8120978 https://doaj.org/article/b0b2f644e9e64b4494689179cba4814e |
op_doi |
https://doi.org/10.3390/rs8120978 |
container_title |
Remote Sensing |
container_volume |
8 |
container_issue |
12 |
container_start_page |
978 |
_version_ |
1766317390241464320 |