Reconstruction of past climate variability and Enso-like fluctuations in the southern Gulf of California (Alfonso Basin) since the last glacial maximum
Bibliographic Data
| ID | 24085045 |
|---|---|
| Authors | Francisca Staines-Urías (Geological Survey of Denmark and Greenland, corresponding author), Oscar González-Yajimovich, Luc Beaufort (0000-0001-6055-9373, Centre de Recherche et d’Enseignement de Géosciences de l’Environnement) |
| Year | 2015 |
| Volume | 83 |
| Issue | 3 |
| Pages | 488-501 |
| Publication date | 2015-05-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Quaternary Research (JOURNAL) |
| Journal identifiers | ISSN: 0033-5894 • E-ISSN: 1096-0287 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1016/j.yqres.2015.03.007 |
| OpenAlex | W2011063786 |
| Language | EN |
| Citations received | 5 |
| References cited | 97 |
Nannofossil assemblages from core MD02-2510 provide a ~ 22 ka record of past oceanographic variability in Alfonso Basin (Gulf of California, east subtropical Pacific). In this area, environmental conditions depend on a monsoonal system heavily influenced by changes in the location of the ITCZ and nearby atmospheric pressure centers. To reconstruct nutricline depth and ENSO-like variability, two ecological indexes were calculated based on the relative abundance of the three dominant coccolith species. The late glacial period is characterized by intensified wind-driven upwelling, high primary productivity and La Niña-like conditions. An environmental shift occurs during the glacial–interglacial transition, El Niño-like conditions intensify, nutricline deepens and surface productivity declines. The late Holocene is characterized by a persistent increase in nutricline depth and dominance of El Niño-like conditions. The fluctuations in the composition of the coccolith assemblages can be related to orbital-scale fluctuations in the average position of the ITCZ. However, while the ENSO-like signal that overprints the record varies in response to orbital forcing, on suborbital time scales the relation between ENSO-like conditions and the average position of the ITCZ and the North Pacific High changes, suggesting that the development of persistent El Niño-like conditions is strongly dependent on the specific climatic background.
Carbonate · Climate change · Climatology · Coccolith · Geography · Glacial period · Holocene · Intertropical Convergence Zone · Last Glacial Maximum · Orbital forcing · paleoceanography · Precipitation · Speleothem · Upwelling · Geological formations and processes · Geology · Geology and Paleoclimatology Research · Methane Hydrates and Related Phenomena · Oceanography · Paleontology
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| Unique citing works | 5 |
|---|---|
| Citations per year | 0,56 |
| Citation span | 2017 - 2025 (9) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 5 |