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Greenland ice sheet
glacier in Greenland
ice melting in Greenland

OMG

Oceans Melting Greenland

Oceans Melting Greenland (OMG) was a 5-year NASA Earth Venture Suborbital (EVS-2) mission that aims to improve estimates of sea level rise by addressing the question: To what extent are the oceans melting Greenland’s ice from below? 

OMG observed changing water temperatures on the continental shelf surrounding Greenland and how marine glaciers react to the presence of warm, salty Atlantic water. The complicated geometry of the sea floor steers currents on the shelf and often determines whether Atlantic water can reach into the long narrow fjords and interact with the coastal glaciers. Because knowledge of these pathways is a critical component of modeling the interaction between the oceans and ice sheet, OMG facilitated improved measurements of the shape and depth of the sea floor in key regions.

Principal Investigator

Josh Willis

Data Centers

PO.DAAC

Funding Programs

EVS-2

OMG used NASA's G-III to fly the Glacier and Ice Surface Topography Interferometer (GLISTIN-A) in order to generate high resolution, high precision elevation measurements of Greenland’s coastal glaciers during the spring. Annual surveys by GLISTIN-A measured glacier thinning and retreat over the preceding season. A second aircraft campaign occurred each summer to deploy 250 expendable temperature and salinity probes along the continental shelf to measure the volume and extent of warm, salty Atlantic water. These data, along with fundamental new and critical observations of airborne marine gravity and ship-based observations of the sea floor geometry, provided a revolutionary dataset for understanding ocean/ice interactions and led to improved estimates of global sea level rise.

Study DatesJuly 25, 2015 - Sept. 16, 2021
Season of StudyBoreal fall, boreal spring, boreal summer, cold, warm
RegionGreenland
Spatial Bounds

N: 84°N

S: 59°N

W: 73°W

E: 7°W

Focus AreasClimate Variability and Change
Geophysical Concepts

Ice and Glacial Properties and Processes

Ocean Properties and Processes

Scientific Topics

Sea Level Rise

Sea Surface Temperature

Ocean Temperature

Glaciers

Ice

Ice Loss

Ocean/Ice Interactions

Glacier Topography

Ice Surface Topography

The following resources provide additional information about the OMG project.