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| Titel |
Technical Note: How accurate can stalagmite formation temperatures be determined using vapour bubble radius measurements in fluid inclusions? |
| VerfasserIn |
F. Spadin, D. Marti, R. Hidalgo-Staub, J. Rička, D. Fleitmann, M. Frenz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 11, no. 6 ; Nr. 11, no. 6 (2015-06-17), S.905-913 |
| Datensatznummer |
250117320
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| Publikation (Nr.) |
 copernicus.org/cp-11-905-2015.pdf |
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| Zusammenfassung |
| Stalagmites are natural archives containing detailed information on
continental climate variability of the past. Microthermometric
measurements of fluid inclusion homogenisation temperatures allow
determination of stalagmite formation temperatures by measuring the
radius of stable laser-induced vapour bubbles inside the
inclusions. A reliable method for precisely measuring the radius of
vapour bubbles is presented. The method is applied to stalagmite
samples for which the formation temperature is known. An assessment of
the bubble radius measurement accuracy and how this error influences
the uncertainty in determining the formation temperature is
provided. We demonstrate that the nominal homogenisation temperature
of a single inclusion can be determined with an accuracy of
±0.25 °C, if the volume of the inclusion is larger
than 105 μm3. With this method, we could measure in a
proof-of-principle investigation that the formation temperature of
10–20 yr
old inclusions in a stalagmite taken from the Milandre cave is 9.87 ± 0.80 °C,
while the mean annual surface temperature, that in the case of the Milandre cave correlates
well with the cave temperature, was 9.6 ± 0.15 °C, calculated from actual
measurements at that time, showing a very good agreement. Formation temperatures of
inclusions formed during the last 450 yr are found in a temperature range between
8.4 and 9.6 °C, which corresponds to the calculated average surface temperature. Paleotemperatures can thus be
determined within ±1.0 °C. |
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