Deriving Nearshore Bathymetry Around Greenland From ATLAS Measurements
Abstract
Nearshore estimates of bathymetry are crucial for understanding coastal change processes in Greenland, which is experiencing uplift of 5-23 mm/yr. However, current in-situ methods of bathymetry collection such as multibeam echo sounding (MBES) cannot easily reach the shallowest coastal waters - where change in coastal elevation will be most evident. To address this issue, we investigated the application of measurements from the advanced topographic laser altimeter system (ATLAS) aboard the NASA ICESat-2 satellite to collect bathymetry estimates around Nuuk, Aasiaat, and Tasiilaq in Greenland. Preliminary results reveal difficult remote sensing conditions around Greenland, including seasonal presence of sea ice and poor reflectance of laser off darker substrate around Tasiilaq. However, point cloud returns around Nuuk and Aasiaat have yielded promising bathymetric profiles that will be compared with profiles from forthcoming MBES surveys (to be conducted late summer 2020).
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2020
- Bibcode:
- 2020AGUFMC030.0007B
- Keywords:
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- 0480 Remote sensing;
- BIOGEOSCIENCES;
- 0758 Remote sensing;
- CRYOSPHERE;
- 1855 Remote sensing;
- HYDROLOGY;
- 4275 Remote sensing and electromagnetic processes;
- OCEANOGRAPHY: GENERAL