Reconstruction of past climate variability and Enso-like fluctuations in the southern Gulf of California (Alfonso Basin) since the last glacial maximum

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

• A 7000-year history of coastal environmental changes from Mexico’s Pacific coast

  Open Access•Thomas A Bianchette, Terrence A McCloskey et al.•The Holocene•2017

  Incluir item

• Paleoenvironmental reconstruction in La Paz Bay, Gulf of California

  Open Access•Fernando Arenas, Harumi Fujita et al.•The Holocene•2021

  Incluir item

• Paleoceanographic evolution of the Gulf of Tehuantepec (Mexican Pacific) during the last ~6 millennia

  Open Access•Ángela García-Gallardo, María Luisa Machain-Castillo et al.•The Holocene•2020

  Incluir item

• Paleoproductivity development during the last 350 ka in the Guaymas Basin, central of the gulf of California

  Open Access•Peekamon Ponmanee, Lihua Ran et al.•Quaternary International•2025

  Incluir item

• Climate and ecology changes during the last deglaciation revealed by stalagmite from Shima Cave, central China

  Open Access•Yingfang Cui, Yijia Liang et al.•Quaternary International•2022

  Incluir item

• Hydrological changes and paleoproductivity in the Gulf of California during middle and late Holocene and their relationship with ITCZ and North American Monsoon variability

  Open Access•Ligia Pérez-Cruz, Ligia Pérez‐Cruz•Quaternary Research•2013

  Incluir item

• Climate and ocean variability during the middle and late Holocene recorded in laminated sediments from Alfonso Basin, Gulf of California, Mexico

  Open Access•Ligia Pérez-Cruz, Ligia Pérez‐Cruz•Quaternary Research•2006

  Incluir item

• A Pliocene‐Pleistocene stack of 57 globally distributed benthic δ 18 O records

  Open Access•L E Lisiecki, Maureen E Raymo•Paleoceanography•2005

  Incluir item

• Variability of El Niño/Southern Oscillation activity at millennial timescales during the Holocene epoch

  Open Access•Christopher M Moy, Geoffrey O Seltzer et al.•Nature•2002

  Incluir item

• Human responses to Middle Holocene climate change on California's Channel Islands

  Open Access•D J Kennett, James P Kennett et al.•Quaternary Science Reviews•2007

  Incluir item

• Insolation values for the climate of the last 10 million years

  Open Access•Alfons Berger, Marie‐France Loutre et al.•Quaternary Science Reviews•1991

  Incluir item

• Timing, Duration, and Transitions of the Last Interglacial Asian Monsoon

  Open Access•Daoxian Yuan, Hai Cheng et al.•Science•2004

  Incluir item

• Southward Migration of the Intertropical Convergence Zone Through the Holocene

  Open Access•Gerald H Haug, Konrad A Hughen et al.•Science•2001

  Incluir item

• Variability in the El Niño-Southern Oscillation Through a Glacial-Interglacial Cycle

  Open Access•Alexander W Tudhope, Colin P Chilcott et al.•Science•2001

  Incluir item

• The Last Glacial Maximum

  Open Access•Peter U Clark, Arthur S Dyke et al.•Science•2009

  Incluir item

• The Holocene Asian Monsoon

  Open Access•Yongjin Wang, Hai Cheng et al.•Science•2005

  Incluir item

• A long-term numerical solution for the insolation quantities of the Earth

  Open Access•J Laskar, Philippe Robutel et al.•Astronomy & Astrophysics•2004

  Incluir item

• Holocene changes in eastern tropical Pacific climate inferred from a Galápagos lake sediment record

  Open Access•Jessica L Conroy, Jonathan T Overpeck et al.•Quaternary Science Reviews•2008

  Incluir item

• Macintosh Program performs time‐series analysis

  Open Access•Didier Paillard, Laurent Labeyrie et al.•Eos•1996

  Incluir item

• Pollen evidence from tropical Australia for the onset of an Enso-dominated climate at c. 4000 BP

  Open Access•James Shulmeister, Brian G Lees•The Holocene•1995

  Incluir item

• Extended 14 C Data Base and Revised Calib 3.0 14 C Age Calibration Program

  Open Access•Minze Stuiver, Paula J Reimer•Radiocarbon•1993

  Incluir item

• IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0-50,000 Years cal BP

  Open Access•Paula J Reimer, M G L Baillie et al.•Radiocarbon•2009

  Incluir item