Preprints
https://doi.org/10.5194/tc-2022-78
https://doi.org/10.5194/tc-2022-78
 
19 Apr 2022
19 Apr 2022
Status: this preprint is currently under review for the journal TC.

High-resolution imaging of supraglacial hydrological features on the Greenland Ice Sheet with NASA’s Airborne Topographic Mapper (ATM) instrument suite

Michael Studinger1, Serdar S. Manizade2,3, Matthew A. Linkswiler2,3, and James K. Yungel2,3 Michael Studinger et al.
  • 1NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
  • 2Science Systems and Applications, Inc., Lanham, MD 20706, USA
  • 3NASA Wallops Flight Facility, Wallops Island, VA, USA

Abstract. Seasonal meltwater pools on the surface of the Greenland Ice Sheet (GrIS) during late Spring and Summer in lakes on the surface and transforms the ice sheet’s surface into a wet environment in the ablation zone below the equilibrium line. These supraglacial lakes in topographic lows on the ice surface are connected by a dendritic pattern of meandering streams and channels that together form a hydrological system consisting of supra-, en-, and subglacial components. Here, we use lidar data from NASA’s Airborne Topographic Mapper (ATM) instrument suite and high-resolution optical imagery collected as part of Operation IceBridge (OIB) in Spring 2019 over the GrIS to develop methods for the study of supraglacial hydrological features. While airborne surveys have a limited temporal and spatial coverage compared to imaging spaceborne sensors, their high footprint density and high-resolution imagery reveal a level of detail that is currently not obtainable from spaceborne measurements. The accuracy and resolution of airborne measurements complement spaceborne measurements, can support calibration and validation of spaceborne methods, and provide information necessary for high-resolution process studies of the supraglacial hydrological system on the GrIS that currently cannot be achieved from spaceborne observations alone.

Michael Studinger et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2022-78', Anonymous Referee #1, 21 May 2022
  • RC2: 'Comment on tc-2022-78', Anonymous Referee #2, 02 Jun 2022

Michael Studinger et al.

Michael Studinger et al.

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Short summary
The footprint density and high-resolution imagery of airborne surveys reveals details in supraglacial hydrological features that are currently not obtainable from spaceborne data. The accuracy and resolution of airborne measurements complement spaceborne measurements, can support calibration and validation of spaceborne methods, and provide information necessary for process studies of the hydrological system on ice sheets that currently cannot be achieved from spaceborne observations alone.