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| Titel |
Earth's surface heat flux |
| VerfasserIn |
J. H. Davies, D. R. Davies |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 1, no. 1 ; Nr. 1, no. 1 (2010-02-22), S.5-24 |
| Datensatznummer |
250000115
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| Publikation (Nr.) |
 copernicus.org/se-1-5-2010.pdf |
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| Zusammenfassung |
| We present a revised estimate of Earth's surface heat flux that is based
upon a heat flow data-set with 38 347 measurements, which is 55% more
than used in previous estimates. Our methodology, like others, accounts for
hydrothermal circulation in young oceanic crust by utilising a half-space
cooling approximation. For the rest of Earth's surface, we estimate the
average heat flow for different geologic domains as defined by global
digital geology maps; and then produce the global estimate by multiplying it
by the total global area of that geologic domain. The averaging is done on a
polygon set which results from an intersection of a 1 degree equal area grid
with the original geology polygons; this minimises the adverse influence of
clustering. These operations and estimates are derived accurately using
methodologies from Geographical Information Science. We consider the
virtually un-sampled Antarctica separately and also make a small correction
for hot-spots in young oceanic lithosphere. A range of analyses is
presented. These, combined with statistical estimates of the error, provide
a measure of robustness. Our final preferred estimate is 47±2 TW,
which is greater than previous estimates. |
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