Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data
Northward shift of the treeline is expected circum-Arctic and has been observed in a number of locations in response to Arctic warming. The transitional zone between forest and tundra is, therefore, a vulnerable region that requires systematic monitoring. Currently, radar remote sensing is hardly em...
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Bibliothek Wissenschaftspark Albert Einstein
2018
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ftawi:oai:epic.awi.de:48094 2023-05-15T14:58:05+02:00 Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data Antonova, Sofia Thiel, Christian Höfle, Bernhard Marx, Sabrina Anders, Katharina Boike, Julia 2018-09 https://epic.awi.de/id/eprint/48094/ https://hdl.handle.net/10013/epic.c51aa216-53cd-41a3-a0d6-3fe7b6ca7926 unknown Bibliothek Wissenschaftspark Albert Einstein Antonova, S. , Thiel, C. , Höfle, B. , Marx, S. , Anders, K. and Boike, J. orcid:0000-0002-5875-2112 (2018) Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data , 15th International Circumpolar Remote Sensing Symposium, Potsdam, Germany, 10 September 2018 - 14 September 2018 . doi:10.2312/GFZ.LIS.2018.002 <https://doi.org/10.2312/GFZ.LIS.2018.002> , hdl:10013/epic.c51aa216-53cd-41a3-a0d6-3fe7b6ca7926 EPIC315th International Circumpolar Remote Sensing Symposium, Potsdam, Germany, 2018-09-10-2018-09-14Potsdam, Germany, Bibliothek Wissenschaftspark Albert Einstein Conference notRev 2018 ftawi https://doi.org/10.2312/GFZ.LIS.2018.002 2021-12-24T15:44:11Z Northward shift of the treeline is expected circum-Arctic and has been observed in a number of locations in response to Arctic warming. The transitional zone between forest and tundra is, therefore, a vulnerable region that requires systematic monitoring. Currently, radar remote sensing is hardly employed in the treeline zone. The unique constellation of the TanDEM-X satellites with its bistatic mode and unprecedented spatial resolution opens new opportunities for monitoring of the treeline zone. We focus on an area near the Trail Valley Creek research basin in the east of the Mackenzie Delta in the Northwest Territories, Canada. The area lies at the northern edge of the treeline zone. Erect vegetation there is characterised by deciduous shrubs up to 3 m in height and isolated patches of sparse coniferous forest. We evaluate the potential of TanDEM-X bistatic data to characterise the structural properties of the forest patches. The TanDEM-X data were acquired during the TanDEM-X Science Phase in 2015, when the effective baseline was large and constant (approximately 540 m). We employ interferometric coherence from multitemporal bistatic pairs and compare it with standard vegetation metrics obtained from airborne LiDAR data. The full-waveform airborne LiDAR data were captured in September 2016, covering an area of about 20 km x 6 km with a point density of approximately 5 points per square meter. LiDAR metrics include vegetation height percentiles and vegetation ratio. The preliminary analysis shows a high agreement between TanDEM-X bistatic coherence and LiDAR vegetation metrics. The relation between coherence and LiDAR metrics, averaged for each forest patch, yields in a strong inverse correlation, varying from -0.81 to -0.88 for different LiDAR metrics. On sub- atch scale, spatial patterns of coherence and LiDAR metrics also show high inverse correspondence. Thus, a pixel-by-pixel comparison gives a first-shot correlation between tree height 99 percentile and coherence from -0.45 to -0.63 for different forest patches. Taking into account the global coverage of multiple bistatic TanDEM-X data acquired for the global digital elevation model, our results provide a basis for the quantification of the treeline properties circum-Arctic. Conference Object Arctic Mackenzie Delta Northwest Territories Tundra Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Northwest Territories Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Valley Creek ENVELOPE(-138.324,-138.324,63.326,63.326) Trail Valley Creek ENVELOPE(-133.415,-133.415,68.772,68.772) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Northward shift of the treeline is expected circum-Arctic and has been observed in a number of locations in response to Arctic warming. The transitional zone between forest and tundra is, therefore, a vulnerable region that requires systematic monitoring. Currently, radar remote sensing is hardly employed in the treeline zone. The unique constellation of the TanDEM-X satellites with its bistatic mode and unprecedented spatial resolution opens new opportunities for monitoring of the treeline zone. We focus on an area near the Trail Valley Creek research basin in the east of the Mackenzie Delta in the Northwest Territories, Canada. The area lies at the northern edge of the treeline zone. Erect vegetation there is characterised by deciduous shrubs up to 3 m in height and isolated patches of sparse coniferous forest. We evaluate the potential of TanDEM-X bistatic data to characterise the structural properties of the forest patches. The TanDEM-X data were acquired during the TanDEM-X Science Phase in 2015, when the effective baseline was large and constant (approximately 540 m). We employ interferometric coherence from multitemporal bistatic pairs and compare it with standard vegetation metrics obtained from airborne LiDAR data. The full-waveform airborne LiDAR data were captured in September 2016, covering an area of about 20 km x 6 km with a point density of approximately 5 points per square meter. LiDAR metrics include vegetation height percentiles and vegetation ratio. The preliminary analysis shows a high agreement between TanDEM-X bistatic coherence and LiDAR vegetation metrics. The relation between coherence and LiDAR metrics, averaged for each forest patch, yields in a strong inverse correlation, varying from -0.81 to -0.88 for different LiDAR metrics. On sub- atch scale, spatial patterns of coherence and LiDAR metrics also show high inverse correspondence. Thus, a pixel-by-pixel comparison gives a first-shot correlation between tree height 99 percentile and coherence from -0.45 to -0.63 for different forest patches. Taking into account the global coverage of multiple bistatic TanDEM-X data acquired for the global digital elevation model, our results provide a basis for the quantification of the treeline properties circum-Arctic. |
format |
Conference Object |
author |
Antonova, Sofia Thiel, Christian Höfle, Bernhard Marx, Sabrina Anders, Katharina Boike, Julia |
spellingShingle |
Antonova, Sofia Thiel, Christian Höfle, Bernhard Marx, Sabrina Anders, Katharina Boike, Julia Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
author_facet |
Antonova, Sofia Thiel, Christian Höfle, Bernhard Marx, Sabrina Anders, Katharina Boike, Julia |
author_sort |
Antonova, Sofia |
title |
Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
title_short |
Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
title_full |
Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
title_fullStr |
Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
title_full_unstemmed |
Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data |
title_sort |
estimation of forest properties in the treeline zone using tandem-x and airborne laser scanning data |
publisher |
Bibliothek Wissenschaftspark Albert Einstein |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48094/ https://hdl.handle.net/10013/epic.c51aa216-53cd-41a3-a0d6-3fe7b6ca7926 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-138.324,-138.324,63.326,63.326) ENVELOPE(-133.415,-133.415,68.772,68.772) |
geographic |
Arctic Northwest Territories Canada Mackenzie Delta Valley Creek Trail Valley Creek |
geographic_facet |
Arctic Northwest Territories Canada Mackenzie Delta Valley Creek Trail Valley Creek |
genre |
Arctic Mackenzie Delta Northwest Territories Tundra |
genre_facet |
Arctic Mackenzie Delta Northwest Territories Tundra |
op_source |
EPIC315th International Circumpolar Remote Sensing Symposium, Potsdam, Germany, 2018-09-10-2018-09-14Potsdam, Germany, Bibliothek Wissenschaftspark Albert Einstein |
op_relation |
Antonova, S. , Thiel, C. , Höfle, B. , Marx, S. , Anders, K. and Boike, J. orcid:0000-0002-5875-2112 (2018) Estimation of forest properties in the treeline zone using TanDEM-X and airborne laser scanning data , 15th International Circumpolar Remote Sensing Symposium, Potsdam, Germany, 10 September 2018 - 14 September 2018 . doi:10.2312/GFZ.LIS.2018.002 <https://doi.org/10.2312/GFZ.LIS.2018.002> , hdl:10013/epic.c51aa216-53cd-41a3-a0d6-3fe7b6ca7926 |
op_doi |
https://doi.org/10.2312/GFZ.LIS.2018.002 |
_version_ |
1766330179324477440 |