- Title
- Climate variability on the Adriatic seaboard during the last glacial inception and MIS 5c from Frasassi Cave stalagmite record
- Creator
- Vanghi, V.; Borsato, A.; Frisia, S.; Drysdale, R.; Hellstrom, J.; Bajo, P.
- Relation
- Quaternary Science Reviews Vol. 201, p. 349-361
- Publisher Link
- http://dx.doi.org/10.1016/j.quascirev.2018.10.023
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2018
- Description
- A stalagmite (FR16) from Frasassi Cave, located near the Adriatic coast of the Italian peninsula, offers a 16 kyr petrographic and stable isotope record spanning from 112.8 ± 1.5 ka to 96.6 ± 1.0 ka, corresponding to the interval from marine isotope stage (MIS) 5c to MIS 5d. The physical characteristics of FR16 calcite, allowed for a thorough understanding of the processes controlling isotopic changes, because fabrics as well are controlled by the environmental parameters within the cave that reflect external climate forcing. The FR16 δ¹³C profile matches fabric changes where columnar fabric usually corresponds to more negative values and micrite/microsparite layers to less negative δ¹³C values, and with the North Greenland Ice-core Project (NGRIP) δ¹⁸ record with more negative δ¹³C values during interstadials GI24 and GI23. This suggests a hydrological sensitivity for the two proxies, and their variability can be linked to recharge changes. On the other hand, the response to Greenland events appears subdued in the δ¹⁸O record and the trend mimics instead the Northern Hemisphere (NH) summer insolation with more negative δ¹⁸O values corresponding to the maximum insolation centred at ca. 105 ka. This behaviour can be explained by the higher sensitivity of δ¹⁸O to rainfall seasonality, moisture source and trajectories, whose combined effect attenuated the stadials/intersadials signal in the stalagmite.
- Subject
- quarternary; paleoclimatology; speleothems; Western Mediterranean
- Identifier
- http://hdl.handle.net/1959.13/1411635
- Identifier
- uon:36369
- Identifier
- ISSN:0277-3791
- Language
- eng
- Reviewed
- Hits: 1810
- Visitors: 1803
- Downloads: 0
| Thumbnail | File | Description | Size | Format |
|---|