2001
DOI: 10.1029/2000jb900405
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New gravity data in the Arctic Ocean: Comparison of airborne and ERS gravity

Abstract: Abstract. New gravity fields from airborne gravimetry and from ERS-1 and -2 satellite altimetry cover extensive portions of the Arctic Ocean. These two data sets may constitute as much as 60% of the data contributions to the Arctic Gravity Project compilation. Here we evaluate the accuracy and resolution of these data and quantify their impact on the compilation. Both gravity determinations compare favorably with Geological Survey of Canada surface measurements in the Beaufort Sea (airborne, 1.86-2.09 mGal rms… Show more

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Cited by 36 publications
(19 citation statements)
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“…Most of these data are included in an international compilation of the gravity field of the entire Arctic (the Arctic Gravity Project, ArcGP; http://earth-info.nga.mil/ GandG/wgs84/agp/). North of 81.58N the ArcGP compilation is based largely on regional aerogravity surveys by the Naval Research Laboratory (Brozena et al 1997;Childers et al 2001). …”
Section: Gravity Studiesmentioning
confidence: 99%
“…Most of these data are included in an international compilation of the gravity field of the entire Arctic (the Arctic Gravity Project, ArcGP; http://earth-info.nga.mil/ GandG/wgs84/agp/). North of 81.58N the ArcGP compilation is based largely on regional aerogravity surveys by the Naval Research Laboratory (Brozena et al 1997;Childers et al 2001). …”
Section: Gravity Studiesmentioning
confidence: 99%
“…Moreover, the U.S. Naval Research Laboratory (NRL) conducted airborne gravity and magnetic surveys in a wide corridor between Svalbard and the Lomonosov Ridge in 1998 and 1999 [ Childers et al , 2001; Brozena et al , 2003] (Figure 1). …”
Section: Introductionmentioning
confidence: 99%
“…The accuracies quoted below are taken from the Canadian Gravity Database. Childers et al (2001) compare ERS-1 and ERS-2 satellite altimetry to ice surface gravity measurements taken by the Geological Survey of Canada (GSC) over the Beaufort Sea. Ship data have accuracy of 3 mGal for the oldest surveys in the Hudson Bay; however, recent ones in the Hudson Strait have an accuracy of 1.5 mGal.…”
Section: Offshore Gravity Datamentioning
confidence: 99%
“…The accuracy of the free-air anomaly calculated for stations measured on the ice shelf is 0.6 mGal while for ground stations around the Hudson Bay, most of them measured before the advent of GPS, it varies from 1.6 mGal to 3 mGal. Childers et al (2001) note that the foot-print of a few kilometres, at sea level, of the radar altimeters used by the satellites makes anomaly resolution better than approximately 15 km difficult. There is a total of 44,277 gravity measurements made on the ice shelf by ships in Hudson Bay.…”
Section: Offshore Gravity Datamentioning
confidence: 99%