دورية أكاديمية

Multiscale Variability and the Comparison of Ground and Satellite Radar Based Measures of Peatland Surface Motion for Peatland Monitoring

التفاصيل البيبلوغرافية
العنوان: Multiscale Variability and the Comparison of Ground and Satellite Radar Based Measures of Peatland Surface Motion for Peatland Monitoring
المؤلفون: Chris Marshall, Henk Pieter Sterk, Peter J. Gilbert, Roxane Andersen, Andrew V. Bradley, Andrew Sowter, Stuart Marsh, David J. Large
المصدر: Remote Sensing, Vol 14, Iss 2, p 336 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Science
مصطلحات موضوعية: bog breathing, InSAR, peatland surface motion, microtopography, precise leveling, Science
الوصف: Peatland surface motion is highly diagnostic of peatland condition. Interferometric Synthetic Aperture Radar (InSAR) can measure this at the landscape scale but requires ground validation. This necessitates upscaling from point to areal measures (80 × 90 m) but is hampered by a lack of data regarding the spatial variability of peat surface motion characteristics. Using a nested precise leveling approach within two areas of upland and low-lying blanket peatland within the Flow Country, Scotland, we examine the multiscale variability of peat surface motion. We then compare this with InSAR timeseries data. We find that peat surface motion varies at multiple scales within blanket peatland with decreasing dynamism with height above the water table e.g., hummocks < lawn < hollows. This trend is dependent upon a number of factors including ecohydrology, pool size/density, peat density, and slope. At the site scale motion can be grouped into central, marginal, and upland peatlands with each showing characteristic amplitude, peak timing, and response to climate events. Ground measurements which incorporate local variability show good comparability with satellite radar derived timeseries. However, current limitations of phase unwrapping in interferometry means that during an extreme drought/event InSAR readings can only qualitatively replicate peat movement in the most dynamic parts of the peatland e.g., pool systems, quaking bog.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2072-4292
Relation: https://www.mdpi.com/2072-4292/14/2/336; https://doaj.org/toc/2072-4292
DOI: 10.3390/rs14020336
URL الوصول: https://doaj.org/article/6bde8146a5264a71ab29e9c264472135
رقم الأكسشن: edsdoj.6bde8146a5264a71ab29e9c264472135
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20724292
DOI:10.3390/rs14020336