دورية أكاديمية
Sensitivity of Sentinel-1 Backscatter to Management-Related Disturbances in Temperate Forests
| العنوان: | Sensitivity of Sentinel-1 Backscatter to Management-Related Disturbances in Temperate Forests |
|---|---|
| المؤلفون: | van der Woude, S., Reiche, J., Sterck, F., Nabuurs, G., Vos, M., Herold, M. |
| المصدر: | Remote Sensing |
| سنة النشر: | 2024 |
| المجموعة: | GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
| الوصف: | The rapid and accurate detection of forest disturbances in temperate forests has become increasingly crucial as policy demands and climate pressure on these forests rise. The cloud-penetrating Sentinel-1 radar constellation provides frequent and high-resolution observations with global coverage, but few studies have assessed its potential for mapping disturbances in temperate forests. This study investigated the sensitivity of temporally dense C-band backscatter data from Sentinel-1 to varying management-related disturbance intensities in temperate forests, and the influence of confounding factors such as radar backscatter signal seasonality, shadow, and layover on the radar backscatter signal at a pixel level. A unique network of 14 experimental sites in the Netherlands was used in which trees were removed to simulate different levels of management-related forest disturbances across a range of representative temperate forest species. Results from six years (2016–2022) of Sentinel-1 observations indicated that backscatter seasonality is dependent on species phenology and degree of canopy cover. The backscatter change magnitude was sensitive to medium- and high-severity disturbances, with radar layover having a stronger impact on the backscatter disturbance signal than radar shadow. Combining ascending and descending orbits and complementing polarizations compared to a single orbit or polarization was found to result in a 34% mean increase in disturbance detection sensitivity across all disturbance severities. This study underlines the importance of linking high-quality experimental ground-based data to dense satellite time series to improve future forest disturbance mapping. It suggests a key role for C-band backscatter time series in the rapid and accurate large-area monitoring of temperate forests and, in particular, the disturbances imposed by logging practices or tree mortality driven by climate change factors. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| العلاقة: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025699Test; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025699_1/component/file_5025717/5025699.pdfTest |
| الإتاحة: | https://doi.org/10.3390/rs16091553Test https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025699Test https://gfzpublic.gfz-potsdam.de/pubman/item/item_5025699_1/component/file_5025717/5025699.pdfTest |
| حقوق: | info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: | edsbas.6F2C4567 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |