EGU21-10728
https://doi.org/10.5194/egusphere-egu21-10728
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The 4DGreenland project: Greenland hydrology assessment from remote sensing

Louise Sandberg Sørensen1 and the 4DGreenland team*
Louise Sandberg Sørensen and the 4DGreenland team
  • 1DTU Space, National Space Institute, Geodesy and Earth Observation, Kgs. Lyngby, Denmark (slss@space.dtu.dk)
  • *A full list of authors appears at the end of the abstract

The high latitudes of the Northern Hemisphere have experienced the largest regional warming over the last decades. On the Greenland ice sheet, rapid changes are observed in response to temperature increase, with the amount of liquid water at the surface particularly increasing. Understanding Greenland’s ice sheet hydrology is essential to assess  its contribution to global sea-level rise in a future warming climate.

With the objective of maximizing the use of Earth Observation (EO) data, the European Space Agency (ESA) has funded the 2-year project 4DGreenland (https://4dgreenland.eo4cryo.dk/) to assess and quantify the hydrology of the Greenland ice sheet. The project is focused on dynamic variations in the hydrological components of the ice sheet, and on quantifying the water fluxes between reservoirs including surface melt, supraglacial lakes and rivers, and subglacial melt and lakes. Efforts will focus on a thorough analysis of various components of the hydrological network in selected test regions and their impact on ice sheet flow. 4DGreenland started in September 2020. Here, we will present the project objectives, methods, and show initial results obtained within the project such as a comparison of supraglacial lake depths from optical imagery and ICESat-2 altimetry data, estimation of basal melt water production, and identification and mapping of surface meltwater presence and subglacial lakes from EO data.

 

4DGreenland team:

Sebastian B. Simonsen (1), Mai Winstrup (1), Natalia H. Andersen (1), Rasmus L. Arildsen (1) Jan Wuite (2), Thomas Nagler (2), Markus Hetzenecker (2) Andrew Shepherd (9) Juha Lemmetyinen (3), Anna Kontu (3), Kimmo Rautiainen (3) Achim Roth (4), Birgit Wessel (4) Amber Leeson (5), Malcolm McMillan (5), Laura Melling (5), Diarmuid Corr (5), Emily Glen (5), Ce Zhang (5) Daniele Fantin (6), Martijn Vermeer (6) Noel Gourmelen (7), Alex Horton (7) Nanna B. Karlsson (8), Anne Solgaard (8), Sofia Ribeiro (8)

How to cite: Sandberg Sørensen, L. and the 4DGreenland team: The 4DGreenland project: Greenland hydrology assessment from remote sensing, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-10728, https://doi.org/10.5194/egusphere-egu21-10728, 2021.

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