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Caribbean hydrological variability during the Holocene as reconstructed from crater lakes on the island of Grenada

Fritz, Sherilyn C.; Björck, Svante LU ; Rigsby, Catherine A.; Baker, Paul A.; Calder-Church, Amy and Conley, Daniel LU (2011) In Journal of Quaternary Science 26(8). p.829-838
Abstract
Contemporary precipitation patterns in the Caribbean region are spatially variable, and the small number of Holocene paleoclimatic records may not adequately capture patterns of variation in the past. The hydrological history of Grenada was inferred from paleolimnological analyses of sediment cores from two crater lakes on the island. The basins were formed by volcanic activity some time during the Last Termination, but were dry between ca. 13 000 and ca. 7200 cal. a BP. After filling, the lakes were initially very shallow, and sedimentation was interrupted by a hiatus ca. 6300-5500 cal. a BP, followed by deposition of a thick tephra in both sites. After 5500 cal. a BP, lake level shows considerable multi-centennial variability,... (More)
Contemporary precipitation patterns in the Caribbean region are spatially variable, and the small number of Holocene paleoclimatic records may not adequately capture patterns of variation in the past. The hydrological history of Grenada was inferred from paleolimnological analyses of sediment cores from two crater lakes on the island. The basins were formed by volcanic activity some time during the Last Termination, but were dry between ca. 13 000 and ca. 7200 cal. a BP. After filling, the lakes were initially very shallow, and sedimentation was interrupted by a hiatus ca. 6300-5500 cal. a BP, followed by deposition of a thick tephra in both sites. After 5500 cal. a BP, lake level shows considerable multi-centennial variability, superimposed upon a long-term trend of generally higher lake level after 3200 cal. a BP. The pattern of lake-level variation in Grenada shows some similarity with other Caribbean paleoclimatic records in terms of the timing of transitions, but differs from several classic studies in the sign of inferred precipitation change. The differences among records may reflect spatially variable precipitation patterns in the past in response to the position of the Intertropical Convergence Zone and to sea surface temperature influences on the trade winds and Caribbean low-level jet. Copyright (C) 2011 John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
paleoclimate, Caribbean, diatoms, lake level, tephra
in
Journal of Quaternary Science
volume
26
issue
8
pages
829 - 838
publisher
John Wiley & Sons
external identifiers
  • wos:000297752600007
  • scopus:81055157911
ISSN
1099-1417
DOI
10.1002/jqs.1512
project
MERGE
language
English
LU publication?
yes
id
acf57401-7865-455d-8336-66003c80c27b (old id 2333519)
date added to LUP
2012-02-06 13:18:05
date last changed
2017-10-01 04:11:19
@article{acf57401-7865-455d-8336-66003c80c27b,
  abstract     = {Contemporary precipitation patterns in the Caribbean region are spatially variable, and the small number of Holocene paleoclimatic records may not adequately capture patterns of variation in the past. The hydrological history of Grenada was inferred from paleolimnological analyses of sediment cores from two crater lakes on the island. The basins were formed by volcanic activity some time during the Last Termination, but were dry between ca. 13 000 and ca. 7200 cal. a BP. After filling, the lakes were initially very shallow, and sedimentation was interrupted by a hiatus ca. 6300-5500 cal. a BP, followed by deposition of a thick tephra in both sites. After 5500 cal. a BP, lake level shows considerable multi-centennial variability, superimposed upon a long-term trend of generally higher lake level after 3200 cal. a BP. The pattern of lake-level variation in Grenada shows some similarity with other Caribbean paleoclimatic records in terms of the timing of transitions, but differs from several classic studies in the sign of inferred precipitation change. The differences among records may reflect spatially variable precipitation patterns in the past in response to the position of the Intertropical Convergence Zone and to sea surface temperature influences on the trade winds and Caribbean low-level jet. Copyright (C) 2011 John Wiley & Sons, Ltd.},
  author       = {Fritz, Sherilyn C. and Björck, Svante and Rigsby, Catherine A. and Baker, Paul A. and Calder-Church, Amy and Conley, Daniel},
  issn         = {1099-1417},
  keyword      = {paleoclimate,Caribbean,diatoms,lake level,tephra},
  language     = {eng},
  number       = {8},
  pages        = {829--838},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Quaternary Science},
  title        = {Caribbean hydrological variability during the Holocene as reconstructed from crater lakes on the island of Grenada},
  url          = {http://dx.doi.org/10.1002/jqs.1512},
  volume       = {26},
  year         = {2011},
}