دورية أكاديمية
Detailed quantification of glacier elevation and mass changes in South Georgia
| العنوان: | Detailed quantification of glacier elevation and mass changes in South Georgia |
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| المؤلفون: | David Farías-Barahona, Christian Sommer, Tobias Sauter, Daniel Bannister, Thorsten C Seehaus, Philipp Malz, Gino Casassa, Paul A Mayewski, Jenny V Turton, Matthias H Braun |
| المصدر: | Environmental Research Letters, Vol 15, Iss 3, p 034036 (2020) |
| بيانات النشر: | IOP Publishing, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Environmental technology. Sanitary engineering LCC:Environmental sciences LCC:Science LCC:Physics |
| مصطلحات موضوعية: | glacier mass balance, elevation changes, InSAR, sub-antarctic glaciers, Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350, Science, Physics, QC1-999 |
| الوصف: | Most glaciers in South America and on the Antarctic Peninsula are retreating and thinning. They are considered strong contributors to global sea level rise. However, there is a lack of glacier mass balance studies in other areas of the Southern Hemisphere, such as the surrounding Antarctic Islands. Here, we present a detailed quantification of the 21st century glacier elevation and mass changes for the entire South Georgia Island using bi-static synthetic aperture radar interferometry between 2000 and 2013. The results suggest a significant mass loss since the beginning of the present century. We calculate an average glacier mass balance of −1.04 ± 0.09 m w.e.a ^−1 and a mass loss rate of 2.28 ± 0.19 Gt a ^−1 (2000–2013), contributing 0.006 ± 0.001 mm a ^−1 to sea-level rise. Additionally, we calculate a subaqueous mass loss of 0.77 ± 0.04 Gt a ^−1 (2003–2016), with an area change at the marine and lake-terminating glacier fronts of −6.58 ± 0.33 km ^2 a ^−1 , corresponding to ∼4% of the total glacier area. Overall, we observe negative mass balance rates in South Georgia, with the highest thinning and retreat rates at the large outlet glaciers located at the north-east coast. Although the spaceborne remote sensing dataset analysed in this research is a key contribution to better understanding of the glacier changes in South Georgia, more detailed field measurements, glacier dynamics studies or further long-term analysis with high-resolution regional climate models are required to precisely identify the forcing factors. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1748-9326 |
| Relation: | https://doaj.org/toc/1748-9326 |
| DOI: | 10.1088/1748-9326/ab6b32 |
| URL الوصول: | https://doaj.org/article/c7086f7350044fdcb5f536fbf1d9f8f4 |
| رقم الأكسشن: | edsdoj.7086f7350044fdcb5f536fbf1d9f8f4 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17489326 |
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| DOI: | 10.1088/1748-9326/ab6b32 |