High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire
Monitoring high latitude wetlands is required to understand feedbacks between terrestrial carbon pools and climate change. Hydrological variability is a key factor driving biogeochemical processes in these ecosystems and effective assessment tools are critical for accurate characterization of surfac...
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Molecular Diversity Preservation International
2012
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ftmdpi:oai:mdpi.com:/2072-4292/4/7/1974/ 2023-08-20T04:08:47+02:00 High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire Nathan Torbick Andreas Persson David Olefeldt Steve Frolking William Salas Stephen Hagen Patrick Crill Changsheng Li agris 2012-06-29 application/pdf https://doi.org/10.3390/rs4071974 EN eng Molecular Diversity Preservation International https://dx.doi.org/10.3390/rs4071974 https://creativecommons.org/licenses/by/3.0/ Remote Sensing; Volume 4; Issue 7; Pages: 1974-1994 PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost Text 2012 ftmdpi https://doi.org/10.3390/rs4071974 2023-07-31T20:29:21Z Monitoring high latitude wetlands is required to understand feedbacks between terrestrial carbon pools and climate change. Hydrological variability is a key factor driving biogeochemical processes in these ecosystems and effective assessment tools are critical for accurate characterization of surface hydrology, soil moisture, and water table fluctuations. Operational satellite platforms provide opportunities to systematically monitor hydrological variability in high latitude wetlands. The objective of this research application was to integrate high temporal frequency Synthetic Aperture Radar (SAR) and high spatial resolution Light Detection and Ranging (LiDAR) observations to assess hydroperiod at a mire in northern Sweden. Geostatistical and polarimetric (PLR) techniques were applied to determine spatial structure of the wetland and imagery at respective scales (0.5 m to 25 m). Variogram, spatial regression, and decomposition approaches characterized the sensitivity of the two platforms (SAR and LiDAR) to wetland hydrogeomorphology, scattering mechanisms, and data interrelationships. A Classification and Regression Tree (CART), based on random forest, fused multi-mode (fine-beam single, dual, quad pol) Phased Array L-band Synthetic Aperture Radar (PALSAR) and LiDAR-derived elevation to effectively map hydroperiod attributes at the Swedish mire across an aggregated warm season (May–September, 2006–2010). Image derived estimates of water and peat moisture were sensitive (R2 = 0.86) to field measurements of water table depth (cm). Peat areas that are underlain by permafrost were observed as areas with fluctuating soil moisture and water table changes. Text Northern Sweden permafrost MDPI Open Access Publishing Remote Sensing 4 7 1974 1994 |
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Open Polar |
collection |
MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost |
spellingShingle |
PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost Nathan Torbick Andreas Persson David Olefeldt Steve Frolking William Salas Stephen Hagen Patrick Crill Changsheng Li High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
topic_facet |
PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost |
description |
Monitoring high latitude wetlands is required to understand feedbacks between terrestrial carbon pools and climate change. Hydrological variability is a key factor driving biogeochemical processes in these ecosystems and effective assessment tools are critical for accurate characterization of surface hydrology, soil moisture, and water table fluctuations. Operational satellite platforms provide opportunities to systematically monitor hydrological variability in high latitude wetlands. The objective of this research application was to integrate high temporal frequency Synthetic Aperture Radar (SAR) and high spatial resolution Light Detection and Ranging (LiDAR) observations to assess hydroperiod at a mire in northern Sweden. Geostatistical and polarimetric (PLR) techniques were applied to determine spatial structure of the wetland and imagery at respective scales (0.5 m to 25 m). Variogram, spatial regression, and decomposition approaches characterized the sensitivity of the two platforms (SAR and LiDAR) to wetland hydrogeomorphology, scattering mechanisms, and data interrelationships. A Classification and Regression Tree (CART), based on random forest, fused multi-mode (fine-beam single, dual, quad pol) Phased Array L-band Synthetic Aperture Radar (PALSAR) and LiDAR-derived elevation to effectively map hydroperiod attributes at the Swedish mire across an aggregated warm season (May–September, 2006–2010). Image derived estimates of water and peat moisture were sensitive (R2 = 0.86) to field measurements of water table depth (cm). Peat areas that are underlain by permafrost were observed as areas with fluctuating soil moisture and water table changes. |
format |
Text |
author |
Nathan Torbick Andreas Persson David Olefeldt Steve Frolking William Salas Stephen Hagen Patrick Crill Changsheng Li |
author_facet |
Nathan Torbick Andreas Persson David Olefeldt Steve Frolking William Salas Stephen Hagen Patrick Crill Changsheng Li |
author_sort |
Nathan Torbick |
title |
High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
title_short |
High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
title_full |
High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
title_fullStr |
High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
title_full_unstemmed |
High Resolution Mapping of Peatland Hydroperiod at a High-Latitude Swedish Mire |
title_sort |
high resolution mapping of peatland hydroperiod at a high-latitude swedish mire |
publisher |
Molecular Diversity Preservation International |
publishDate |
2012 |
url |
https://doi.org/10.3390/rs4071974 |
op_coverage |
agris |
genre |
Northern Sweden permafrost |
genre_facet |
Northern Sweden permafrost |
op_source |
Remote Sensing; Volume 4; Issue 7; Pages: 1974-1994 |
op_relation |
https://dx.doi.org/10.3390/rs4071974 |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.3390/rs4071974 |
container_title |
Remote Sensing |
container_volume |
4 |
container_issue |
7 |
container_start_page |
1974 |
op_container_end_page |
1994 |
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1774721266209521664 |