A new field experiment in the Greenland ice cap to test Newton's inverse square law
A geophysical experiment was conducted in a 2-km-deep hole in the Greenland ice cap at depths between 213 m and 1673 m to test for possible violations of Newton's inverse-square law. A detailed ice-sounding radar survey was carried out to 5 km from the hole and merged with regional airborne rad...
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ftosti:oai:osti.gov:6313797 2023-07-30T04:03:48+02:00 A new field experiment in the Greenland ice cap to test Newton's inverse square law Ander, M.E. Zumberge, M.A. Lautzenhiser, T. Parker, R.L. Aiken, C.L.V. Gorman, M.R. Nieto, M.M. Ferguson, J.F. McMechan, G.A. 2021-02-12 application/pdf http://www.osti.gov/servlets/purl/6313797 https://www.osti.gov/biblio/6313797 unknown http://www.osti.gov/servlets/purl/6313797 https://www.osti.gov/biblio/6313797 71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS GRAVITATION TESTING EARTH PLANET GREENLAND MEASURING METHODS PLANETS 2021 ftosti 2023-07-11T10:47:09Z A geophysical experiment was conducted in a 2-km-deep hole in the Greenland ice cap at depths between 213 m and 1673 m to test for possible violations of Newton's inverse-square law. A detailed ice-sounding radar survey was carried out to 5 km from the hole and merged with regional airborne radar data to define the basement interface. Highly accurate gravity measurements were carried out to 15 km from the hole to detect lateral density changes in the bedrock. The measurements were controlled with very accurate satellite and conventional positioning techniques. The basement interface model was input into a Newtonian computation to correct the observed gravity for known earth structure resulting in an anomalous gravity gradient of +3.87 mGal. A 3 dimensional ideal body analysis of the surface and borehole gravity data provided a means of bounding all possible Newtonian solutions for lateral density variation below the ice. Solutions with regional gravity offsets greater than or equal to10 mGal and density contrasts less than or equal to0.30 g/cm/sup 3/ are possible. We cannot unambiguously attribute the anomalous gradient to a breakdown of Newtonian gravity because there remains the possibility it is due to unexpected geological features in the rock below the ice. 11 refs., 6 figs., 1 tab. Other/Unknown Material Greenland Ice cap SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Greenland |
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Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS GRAVITATION TESTING EARTH PLANET GREENLAND MEASURING METHODS PLANETS |
spellingShingle |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS GRAVITATION TESTING EARTH PLANET GREENLAND MEASURING METHODS PLANETS Ander, M.E. Zumberge, M.A. Lautzenhiser, T. Parker, R.L. Aiken, C.L.V. Gorman, M.R. Nieto, M.M. Ferguson, J.F. McMechan, G.A. A new field experiment in the Greenland ice cap to test Newton's inverse square law |
topic_facet |
71 CLASSICAL AND QUANTUM MECHANICS GENERAL PHYSICS GRAVITATION TESTING EARTH PLANET GREENLAND MEASURING METHODS PLANETS |
description |
A geophysical experiment was conducted in a 2-km-deep hole in the Greenland ice cap at depths between 213 m and 1673 m to test for possible violations of Newton's inverse-square law. A detailed ice-sounding radar survey was carried out to 5 km from the hole and merged with regional airborne radar data to define the basement interface. Highly accurate gravity measurements were carried out to 15 km from the hole to detect lateral density changes in the bedrock. The measurements were controlled with very accurate satellite and conventional positioning techniques. The basement interface model was input into a Newtonian computation to correct the observed gravity for known earth structure resulting in an anomalous gravity gradient of +3.87 mGal. A 3 dimensional ideal body analysis of the surface and borehole gravity data provided a means of bounding all possible Newtonian solutions for lateral density variation below the ice. Solutions with regional gravity offsets greater than or equal to10 mGal and density contrasts less than or equal to0.30 g/cm/sup 3/ are possible. We cannot unambiguously attribute the anomalous gradient to a breakdown of Newtonian gravity because there remains the possibility it is due to unexpected geological features in the rock below the ice. 11 refs., 6 figs., 1 tab. |
author |
Ander, M.E. Zumberge, M.A. Lautzenhiser, T. Parker, R.L. Aiken, C.L.V. Gorman, M.R. Nieto, M.M. Ferguson, J.F. McMechan, G.A. |
author_facet |
Ander, M.E. Zumberge, M.A. Lautzenhiser, T. Parker, R.L. Aiken, C.L.V. Gorman, M.R. Nieto, M.M. Ferguson, J.F. McMechan, G.A. |
author_sort |
Ander, M.E. |
title |
A new field experiment in the Greenland ice cap to test Newton's inverse square law |
title_short |
A new field experiment in the Greenland ice cap to test Newton's inverse square law |
title_full |
A new field experiment in the Greenland ice cap to test Newton's inverse square law |
title_fullStr |
A new field experiment in the Greenland ice cap to test Newton's inverse square law |
title_full_unstemmed |
A new field experiment in the Greenland ice cap to test Newton's inverse square law |
title_sort |
new field experiment in the greenland ice cap to test newton's inverse square law |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/6313797 https://www.osti.gov/biblio/6313797 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice cap |
genre_facet |
Greenland Ice cap |
op_relation |
http://www.osti.gov/servlets/purl/6313797 https://www.osti.gov/biblio/6313797 |
_version_ |
1772814894197899264 |