Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018
Air temperatures in the Arctic have increased substantially over the last decades, which has extensively altered the properties of the land surface. Capturing the state and dynamics of Land Surface Temperatures (LSTs) at high spatial detail is of high interest as LST is dependent on a variety of sur...
Published in: | Remote Sensing |
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2019
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Online Access: | https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/19330 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193301 https://doi.org/10.3390/rs11192329 https://opus.bibliothek.uni-wuerzburg.de/files/19330/remotesensing-11-02329.pdf |
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ftunivwuerz:oai:opus.bibliothek.uni-wuerzburg.de:19330 2023-09-05T13:17:11+02:00 Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 Nill, Leon Ullmann, Tobias Kneisel, Christof Sobiech-Wolf, Jennifer Baumhauer, Roland 2019 application/pdf https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/19330 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193301 https://doi.org/10.3390/rs11192329 https://opus.bibliothek.uni-wuerzburg.de/files/19330/remotesensing-11-02329.pdf eng eng https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/19330 urn:nbn:de:bvb:20-opus-193301 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193301 https://doi.org/10.3390/rs11192329 https://opus.bibliothek.uni-wuerzburg.de/files/19330/remotesensing-11-02329.pdf https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess ddc:526 article doc-type:article 2019 ftunivwuerz https://doi.org/10.3390/rs11192329 2023-08-13T22:34:10Z Air temperatures in the Arctic have increased substantially over the last decades, which has extensively altered the properties of the land surface. Capturing the state and dynamics of Land Surface Temperatures (LSTs) at high spatial detail is of high interest as LST is dependent on a variety of surficial properties and characterizes the land–atmosphere exchange of energy. Accordingly, this study analyses the influence of different physical surface properties on the long-term mean of the summer LST in the Arctic Mackenzie Delta Region (MDR) using Landsat 30 m-resolution imagery between 1985 and 2018 by taking advantage of the cloud computing capabilities of the Google Earth Engine. Multispectral indices, including the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI) and Tasseled Cap greenness (TCG), brightness (TCB), and wetness (TCW) as well as topographic features derived from the TanDEM-X digital elevation model are used in correlation and multiple linear regression analyses to reveal their influence on the LST. Furthermore, surface alteration trends of the LST, NDVI, and NDWI are revealed using the Theil-Sen (T-S) regression method. The results indicate that the mean summer LST appears to be mostly influenced by the topographic exposition as well as the prevalent moisture regime where higher evapotranspiration rates increase the latent heat flux and cause a cooling of the surface, as the variance is best explained by the TCW and northness of the terrain. However, fairly diverse model outcomes for different regions of the MDR (R2 from 0.31 to 0.74 and RMSE from 0.51 °C to 1.73 °C) highlight the heterogeneity of the landscape in terms of influential factors and suggests accounting for a broad spectrum of different factors when modeling mean LSTs. The T-S analysis revealed large-scale wetting and greening trends with a mean decadal increase of the NDVI/NDWI of approximately +0.03 between 1985 and 2018, which was mostly accompanied by a cooling of the land surface given the ... Article in Journal/Newspaper Arctic Mackenzie Delta Würzburg University: Online Publication Service Arctic Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Remote Sensing 11 19 2329 |
institution |
Open Polar |
collection |
Würzburg University: Online Publication Service |
op_collection_id |
ftunivwuerz |
language |
English |
topic |
ddc:526 |
spellingShingle |
ddc:526 Nill, Leon Ullmann, Tobias Kneisel, Christof Sobiech-Wolf, Jennifer Baumhauer, Roland Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
topic_facet |
ddc:526 |
description |
Air temperatures in the Arctic have increased substantially over the last decades, which has extensively altered the properties of the land surface. Capturing the state and dynamics of Land Surface Temperatures (LSTs) at high spatial detail is of high interest as LST is dependent on a variety of surficial properties and characterizes the land–atmosphere exchange of energy. Accordingly, this study analyses the influence of different physical surface properties on the long-term mean of the summer LST in the Arctic Mackenzie Delta Region (MDR) using Landsat 30 m-resolution imagery between 1985 and 2018 by taking advantage of the cloud computing capabilities of the Google Earth Engine. Multispectral indices, including the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI) and Tasseled Cap greenness (TCG), brightness (TCB), and wetness (TCW) as well as topographic features derived from the TanDEM-X digital elevation model are used in correlation and multiple linear regression analyses to reveal their influence on the LST. Furthermore, surface alteration trends of the LST, NDVI, and NDWI are revealed using the Theil-Sen (T-S) regression method. The results indicate that the mean summer LST appears to be mostly influenced by the topographic exposition as well as the prevalent moisture regime where higher evapotranspiration rates increase the latent heat flux and cause a cooling of the surface, as the variance is best explained by the TCW and northness of the terrain. However, fairly diverse model outcomes for different regions of the MDR (R2 from 0.31 to 0.74 and RMSE from 0.51 °C to 1.73 °C) highlight the heterogeneity of the landscape in terms of influential factors and suggests accounting for a broad spectrum of different factors when modeling mean LSTs. The T-S analysis revealed large-scale wetting and greening trends with a mean decadal increase of the NDVI/NDWI of approximately +0.03 between 1985 and 2018, which was mostly accompanied by a cooling of the land surface given the ... |
format |
Article in Journal/Newspaper |
author |
Nill, Leon Ullmann, Tobias Kneisel, Christof Sobiech-Wolf, Jennifer Baumhauer, Roland |
author_facet |
Nill, Leon Ullmann, Tobias Kneisel, Christof Sobiech-Wolf, Jennifer Baumhauer, Roland |
author_sort |
Nill, Leon |
title |
Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
title_short |
Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
title_full |
Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
title_fullStr |
Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
title_full_unstemmed |
Assessing Spatiotemporal Variations of Landsat Land Surface Temperature and Multispectral Indices in the Arctic Mackenzie Delta Region between 1985 and 2018 |
title_sort |
assessing spatiotemporal variations of landsat land surface temperature and multispectral indices in the arctic mackenzie delta region between 1985 and 2018 |
publishDate |
2019 |
url |
https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/19330 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193301 https://doi.org/10.3390/rs11192329 https://opus.bibliothek.uni-wuerzburg.de/files/19330/remotesensing-11-02329.pdf |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Mackenzie Delta |
geographic_facet |
Arctic Mackenzie Delta |
genre |
Arctic Mackenzie Delta |
genre_facet |
Arctic Mackenzie Delta |
op_relation |
https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/19330 urn:nbn:de:bvb:20-opus-193301 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193301 https://doi.org/10.3390/rs11192329 https://opus.bibliothek.uni-wuerzburg.de/files/19330/remotesensing-11-02329.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs11192329 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
19 |
container_start_page |
2329 |
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1776198455393255424 |