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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ftdoajarticles:oai:doaj.org/article:f027215e8908401ea906ca83ebdc4ab7 2023-05-15T17:44:50+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 2012-06-01T00:00:00Z https://doi.org/10.3390/rs4071974 https://doaj.org/article/f027215e8908401ea906ca83ebdc4ab7 EN eng MDPI AG http://www.mdpi.com/2072-4292/4/7/1974 https://doaj.org/toc/2072-4292 doi:10.3390/rs4071974 2072-4292 https://doaj.org/article/f027215e8908401ea906ca83ebdc4ab7 Remote Sensing, Vol 4, Iss 7, Pp 1974-1994 (2012) PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost Science Q article 2012 ftdoajarticles https://doi.org/10.3390/rs4071974 2022-12-31T16:27:40Z 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 (R 2 = 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. Article in Journal/Newspaper Northern Sweden permafrost Directory of Open Access Journals: DOAJ Articles Remote Sensing 4 7 1974 1994 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost Science Q |
spellingShingle |
PALSAR LiDAR mire hydroperiod high latitude wetlands permafrost Science Q 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 Science Q |
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 (R 2 = 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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2012 |
url |
https://doi.org/10.3390/rs4071974 https://doaj.org/article/f027215e8908401ea906ca83ebdc4ab7 |
genre |
Northern Sweden permafrost |
genre_facet |
Northern Sweden permafrost |
op_source |
Remote Sensing, Vol 4, Iss 7, Pp 1974-1994 (2012) |
op_relation |
http://www.mdpi.com/2072-4292/4/7/1974 https://doaj.org/toc/2072-4292 doi:10.3390/rs4071974 2072-4292 https://doaj.org/article/f027215e8908401ea906ca83ebdc4ab7 |
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 |
_version_ |
1766147122955026432 |