McClymont, Erin L; Ganeshram, Raja S; Pichevin, Laetitia; Talbot, Helen M; van Dongen, Frank H; Thunell, Robert C; Haywood, Alan M; Singarayer, Joy S; Valdes, Paul J (2012): (Table 1) Age determination of sediment core MD02-2515 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.825548, Supplement to: McClymont, EL et al. (2012): Sea-surface temperature records of Termination 1 in the Gulf of California: Challenges for seasonal and interannual analogues of tropical Pacific climate change. Paleoceanography, 27(2), PA2202, https://doi.org/10.1029/2011PA002226
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Centennial-scale records of sea-surface temperature and opal composition spanning the Last Glacial Maximum and Termination 1 (circa 25-6 ka) are presented here from Guaymas Basin in the Gulf of California. Through the application of two organic geochemistry proxies, the UK37' index and the TEX86H index, we present evidence for rapid, stepped changes in temperatures during deglaciation. These occur in both temperature proxies at 13 ka (~3°C increase in 270 years), 10.0 ka (~2°C decrease over ~250 years) and at 8.2 ka (3°C increase in <200 years). An additional rapid warming step is also observed in TEX86H at 11.5 ka. In comparing the two temperature proxies and opal content, we consider the potential for upwelling intensity to be recorded and link this millennial-scale variability to shifting Intertropical Convergence Zone position and variations in the strength of the Subtropical High. The onset of the deglacial warming from 17 to 18 ka is comparable to a "southern hemisphere" signal, although the opal record mimics the ice-rafting events of the north Atlantic (Heinrich events). Neither the modern seasonal cycle nor El Niño/Southern Oscillation patterns provide valid analogues for the trends we observe in comparison with other regional records. Fully coupled climate model simulations confirm this result, and in combination we question whether the seasonal or interannual climate variations of the modern climate are valid analogues for the glacial and deglacial tropical Pacific.
Coverage:
Latitude: 27.483500 * Longitude: -112.074300
Date/Time Start: 2002-06-13T04:53:00 * Date/Time End: 2002-06-13T04:53:00
Minimum DEPTH, sediment/rock: 1.92 m * Maximum DEPTH, sediment/rock: 36.65 m
Event(s):
MD02-2515 (MD022515) * Latitude: 27.483500 * Longitude: -112.074300 * Date/Time: 2002-06-13T04:53:00 * Elevation: -881.0 m * Recovery: 74.49 m * Location: Guaymas Basin * Campaign: MD126 (IMAGES VIII - MONA) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Age, dated material | Dated material | McClymont, Erin L | |||
| 3 | Age, dated | Age dated | ka | McClymont, Erin L | Age, 14C AMS | |
| 4 | Age, dated standard deviation | Age dated std dev | ± | McClymont, Erin L | Age, 14C AMS | |
| 5 | Calendar age | Cal age | ka BP | McClymont, Erin L | Age, 14C milieu/reservoir corrected | MARINE04, modern 600 year reservoir effect in the GOC |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
56 data points