New Gravity Field for the Arctic

Abstract

The study of the Arctic Ocean has been hampered by incomplete basic knowledge of the basin and its structure. An improved gravity anomaly map (Figure 1) and grid have been developed that complement the new International Chart of the Arctic Ocean [Jakobsson et al., 2008]. This article announces the availability of the Arctic Gravity Project (ArcGP) grid version 2.0 and discusses the genesis of the project.

Crustal structure and evolution of the Arctic Caledonides: Results from controlled-source seismology

“…A Butterworth low-pass filter with cutoff wavelength of 5 km and the order of eight was applied to the gravity data. Comparison of the obtained free-air gravity anomaly with a regional dataset (ArcGP grid, Kenyon et al, 2008) shows a good match, however our measurements have a significantly better resolution.…”

Geological features of the northeastern Canadian Arctic margin revealed from analysis of potential field data

“…This study was aimed at elucidating the regional subsurface geology and tectonics of the The gravity data grid was downloaded from the Arctic Gravity Project (ArcGP; http://earthinfo.nga.mil/GandG/wgs84/agp/index.html), an international compilation of public domain Free-Air and Bouguer anomaly grids for the Circum-Arctic region north of 64º N (Kenyon et al, 2008), while the magnetic data grid was extracted from the new Circum-Arctic magnetic anomaly grid (CAMP-M) dataset compilations Saltus et al, 2011). Respective grids were later re-projected and geo-referenced.…”

Recent developments in high-resolution global altimetric gravity field modeling

“…The ArcGP gravity field is derived from a combination of data from different sources such as marine, airborne, altimetry etc. (Kenyon and Forsberg, 2008). For KMS02, the lack of retracked altimetry over the ice means that this field is not very good.…”

“…At high latitudes, the inclusion of six months of laser altimetry from ICESAT and marine data in the Arctic Ocean from the ArcGP project (Kenyon and Forsberg, 2008) improved the accuracy and coverage of the gravity field. Using these data, it becomes possible to close the polar gap beyond 82°N where no radar altimetry has been previously available.…”