Operation IceBridge - Polar Geophysics Group

Folks , NASA recently completed the most comprehensive 11 year survey of Earth's Polar regions - under what they call "Project IceBridge" . Their report talks about Gravitational and Magnetic anomalies , both in Antarctica as well as in Greenland....hmm !!

It's another question though , whether they HONESTLY published ALL of their data without manipulating it :)) Anyhow , here are some details for whatever it's worth :-


  • Operation IceBridge

Operation IceBridge

NASA's Operation IceBridge (OIB) Mission - Monitoring the Earth's polar regions for over a decade

NASA's Operation IceBridge Completes 11 Years of Polar Surveys. Source: NASA


NASA's Operation IceBridge (OIB) Mission is the largest airborne survey of Earth's polar ice ever flown. From 2009 to 2019, OIB collected yearly, multi-instrument documentation of the Arctic and Antarctic ice sheets, ice shelves, and sea ice.

Potential Fields Team - Gravity and Magnetics

The LDEO Polar Geophysics Group leads the Potential Fields Instrument Team for Operation IceBridge. Together with partners Sander Geophysics Limited (SGL) and the United States Geological Survey (USGS), we have collected gravity and magnetic anomaly data from Operation IceBridge flights in both Greenland and Antarctica. Anomaly data, along with derived products, are archived and distributed by the National Snow and Ice Data Center (NSIDC).

Image Carousel with 5 slides

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  1. Slide 1: The gravity team with NASA's GV. Photo: Matt Linkswiler (NASA)
  • Slide 2: NASA's P3 in Thule, Greenland. Photo: Caitlin Locke (LDEO)
  • Slide 3: Greenland from NASA's P3. Photo: Caitlin Locke (LDEO)
  • Slide 4: NASA's DC8 in Ushuaia, Argentina. Photo: Caitlin Locke (LDEO)
  • Slide 5: NASA's GV in Hobart, Tasmaina. Photo: Renata Constantino (LDEO)

Greenland from NASA's P3. Photo: Caitlin Locke (LDEO)


Why Potential Fields?

Gravimeters (gravity meters) measure variations in the Earth's gravitational field. The free air gravity anomaly is sensitive to the density and topography of the Earth. In the polar regions, we use this gravity measurement to create models of the bathymetry, or water depth, under floating ice.

Much of the continental ice shelves surrounding ice sheets remain unmapped due to their inaccessibility; and yet, the seafloor shape has first-order controls over the movement of deep ocean heat that is melting glaciers. The acquisition and modeling of airborne gravity data for bathymetry helps map these inaccessible areas of our planet; thus, improving ocean and climate model projections.

Magnetic anomalies are caused by variation in the magnetic susceptibility of the rocks in Earth’s crust. We fly a magnetometer to measure these anomalies and help build a model of the geology that underlies the polar ice. These models then help us to interpret the gravity field, improve the bathymetry models, and understand the geological setting and history of the polar regions.

OIB Gravity data

Survey Area Year Gravimeter
Antarctica 2009-2018 AIRGrav by SGL
Antarctica 2019 LDEO airborne Gravimeters
Greenland 2010-2012 AIRGrav by SGL
Greenland 2017 LDEO airborne Gravimeters

OIB Magnetic Data

Survey Area Year Magnetometer
Antarctica 2011-2012 Scintrex CS-3 Cesium Vapor and Billingsley TFM100G2 Fluxgate
Greenland 2013 & 2017 Scintrex CS-3 Cesium Vapor and Billingsley TFM100G2 Fluxgate

Access OIB gravity and magnetic data on our OIB Data Page.

To learn more about OIB, please visit NASA's OIB Mission website.


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Folks , even the open acknowledgement by NASA that there exist gravitational & magnetic anomalies in Antarctica and Arctic respectively , is by itself a big step forward to prove Hollow Earth .

Also , "Polar Geophysics" as a distinct field of science clearly implies that there is some new physics emerging from an 11 year study of Earth's Polar regions - by NASA .


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The University of Texas has been doing some good work in this field :-

Polar and Planetary.

A Distinctive Approach to Polar and Planetary Geophysics

Scientists at the University of Texas Institute for Geophysics (UTIG) employ space-based, airborne, land-based, and marine geophysical methods to better understand ice sheet evolution, climate, and geologic processes in the polar regions. Our scientists devise and implement investigations that use cutting edge tools and field campaigns to monitor current oceanographic, glacial, and ice sheet processes, to determine past rates of polar geological evolution, and to predict how elements of the polar Earth system will evolve in the future.

By taking a distinctively geophysical approach to studying planetary systems, UTIG scientists are building the scientific and technical foundations to lead the next generation of geophysical planetary missions, instruments, and discoveries. UTIG researchers study planetary systems via the tools of terrestrial analog field programs, geophysical modeling, and mission science. With a breadth of research areas ranging from planetary ionospheres to planetary cores, including a strong focus on the cryosphere/hydrosphere, impacts, and deep interior, UTIG specializes on problems relating to Mars, icy satellites, and giant planets.

UTIG researchers seamlessly transfer technologies, tools, and approaches from polar science to bring new insights to planetary exploration. This interplay between expeditionary polar science and planetary missions and data analysis also allows planetary discoveries and technologies to feed back into the development of new tools and new understandings of Earth system processes.

Learn more about our researchers and students studying polar regions and planetary systems.