Zhang, Yancheng; Zhang, Xu; Chiessi, Cristiano Mazur; Mulitza, Stefan; Zhang, Xiao; Lohmann, Gerrit; Prange, Matthias; Behling, Hermann; Zabel, Matthias; Govin, Aline; Sawakuchi, André Oliveira; da Cruz Junior, Francisco William; Wefer, Gerold (2016): (Table S2) The reconstructed sea surface temperature (SST) over the eastern equatorial Pacific [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.867293, Supplement to: Zhang, Y et al. (2016): Equatorial Pacific forcing of western Amazonian precipitation during Heinrich Stadial 1. Scientific Reports, 6, 35866, https://doi.org/10.1038/srep35866
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Abundant hydroclimatic evidence from western Amazonia and the adjacent Andes documents wet conditions during Heinrich Stadial 1 (HS1, 18-15 ka), a cold period in the high latitudes of the North Atlantic. This precipitation anomaly was attributed to a strengthening of the South American summer monsoon due to a change in the Atlantic interhemispheric sea surface temperature (SST) gradient. However, the physical viability of this mechanism has never been rigorously tested. We address this issue by combining a thorough compilation of tropical South American paleorecords and a set of atmosphere model sensitivity experiments. Our results show that the Atlantic SST variations alone, although leading to dry conditions in northern South America and wet conditions in northeastern Brazil, cannot produce increased precipitation over western Amazonia and the adjacent Andes during HS1. Instead, an eastern equatorial Pacific SST increase (i.e., 0.5-1.5 °C), in response to the slowdown of the Atlantic Meridional Overturning Circulation during HS1, is crucial to generate the wet conditions in these regions. The mechanism works via anomalous low sea level pressure over the eastern equatorial Pacific, which promotes a regional easterly low-level wind anomaly and moisture recycling from central Amazonia towards the Andes.
Source:
Benway, Heather M; Mix, Alan C; Haley, Brian A; Klinkhammer, Gary P (2006): Eastern Pacific Warm Pool paleosalinity and climate variability: 0-30 kyr. Paleoceanography, 21(3), PA3008, https://doi.org/10.1029/2005PA001208
Bova, Samantha C; Herbert, Timothy D; Rosenthal, Yair; Kalansky, Julie; Altabet, Mark A; Chazen, S; Mojarro, Angel; Zech, Jana (2015): Links between eastern equatorial Pacific stratification and atmospheric CO2 rise during the last deglaciation. Paleoceanography, 30(11), 1407-1424, https://doi.org/10.1002/2015PA002816
Dubois, Nathalie; Kienast, Markus; Kienast, Stephanie S; Normandeau, Claire; Calvert, Stephen E; Herbert, Timothy D; Mix, Alan C (2011): Millennial-scale variations in hydrography and biogeochemistry in the Eastern Equatorial Pacific over the last 100 kyr. Quaternary Science Reviews, 30(1-2), 210-223, https://doi.org/10.1016/j.quascirev.2010.10.012
Kienast, Markus; Kienast, Stephanie S; Calvert, Stephen E; Eglinton, Timothy Ian; Mollenhauer, Gesine; Francois, Roger; Mix, Alan C (2006): Eastern Pacific cooling and Atlantic overturning circulation during the last deglatiation. Nature, 443, 846-849, https://doi.org/10.1038/nature05222
Koutavas, Athanasios; Lynch-Stieglitz, Jean; Marchitto, Thomas M; Sachs, Julian P (2002): El Nino-Like Pattern in Ice Age Tropical Pacific Sea Surface Temperature. Science, 297(5579), 226-230, https://doi.org/10.1126/science.1072376
Koutavas, Athanasios; Sachs, Julian P (2008): Northern timing of deglaciation in the eastern equatorial Pacific from alkenone paleothermometry. Paleoceanography, 23(4), PA4205, https://doi.org/10.1029/2008PA001593
Lea, David W; Pak, Dorothy K; Belanger, Christina L; Spero, Howard J; Hall, Michael A; Shackleton, Nicholas J (2006): Paleoclimate history of Galápagos surface waters over the last 135,000yr. Quaternary Science Reviews, 25(11-12), 1152-1167, https://doi.org/10.1016/j.quascirev.2005.11.010
Leduc, Guillaume; Vidal, Laurence; Tachikawa, Kazuyo; Rostek, Frauke; Sonzogni, Corinne; Beaufort, Luc; Bard, Edouard (2007): Moisture transport across Central America as a positive feedback on abrupt climatic changes. Nature, 445, 908-911, https://doi.org/10.1038/nature05578
Pena, Leopoldo D; Cacho, Isabel; Ferretti, Patrizia; Hall, Michael A (2008): El Niño-Southern Oscillation-like variability during glacial terminations and interlatitudinal teleconnections. Paleoceanography, 23(3), PA3101, https://doi.org/10.1029/2008PA001620
Sadekov, Aleksey Y; Ganeshram, Raja S; Pichevin, Laetitia; Berdin, Rose; McClymont, Erin L; Elderfield, Henry; Tudhope, Alexander W (2013): Palaeoclimate reconstructions reveal a strong link between El Niño-Southern Oscillation and Tropical Pacific mean state. Nature Communications, 4, https://doi.org/10.1038/ncomms3692
Further details:
Project(s):
Coverage:
Median Latitude: 0.910359 * Median Longitude: -85.815121 * South-bound Latitude: -3.990000 * West-bound Longitude: -92.398000 * North-bound Latitude: 8.205500 * East-bound Longitude: -81.310000
Date/Time Start: 1963-04-05T00:00:00 * Date/Time End: 2002-06-23T05:05:00
Minimum Elevation: -3091.0 m * Maximum Elevation: -617.0 m
Event(s):
202-1240 * Latitude: 0.021850 * Longitude: -86.462630 * Date/Time: 2002-05-16T00:00:00 * Elevation: -2920.8 m * Penetration: 613.1 m * Recovery: 622.5 m * Location: Equatorial East Pacific * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 65 cores; 603.7 m cored; 9.4 m drilled; 103.1 % recovery
202-1242 * Latitude: 7.855867 * Longitude: -83.606967 * Date/Time: 2002-05-26T00:00:00 * Elevation: -1363.7 m * Penetration: 770.3 m * Recovery: 770.5 m * Location: North Pacific Ocean * Campaign: Leg202 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 80 cores; 743.8 m cored; 26.5 m drilled; 103.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Zhang, Yancheng | |||
| 2 | Sample code/label | Sample label | Zhang, Yancheng | |||
| 3 | Comment | Comment | Zhang, Yancheng | Approach | ||
| 4 | Species | Species | Zhang, Yancheng | |||
| 5 | Sea surface temperature | SST | °C | Zhang, Yancheng | HS1 mean | |
| 6 | Sea surface temperature | SST | °C | Zhang, Yancheng | LGM mean | |
| 7 | Difference | Diff | Zhang, Yancheng | Difference (HS1-LGM) | ||
| 8 | Comment | Comment | Zhang, Yancheng | Difference (HS1-LGM) | ||
| 9 | Reference/source | Reference | Zhang, Yancheng |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
88 data points
Data
| 1 Event | 2 Sample label | 3 Comment (Approach) | 4 Species | 5 SST [°C] (HS1 mean) | 6 SST [°C] (LGM mean) | 7 Diff (Difference (HS1-LGM)) | 8 Comment (Difference (HS1-LGM)) | 9 Reference |
|---|---|---|---|---|---|---|---|---|
| MD02-2529 | MD02-2529 | UK'37 | 26.18 | 26.09 | 0.09 | Leduc et al., 2007 | ||
| ME0005A-43JC | ME0005A-43JC | Mg/Ca | G. ruber | 25.05 | 24.12 | 0.93 | Benway et al., 2006 | |
| CD38-17P | CD38-17P | Mg/Ca | G. ruber | 21.69 | 20.34 | 1.35 | Sadekov et al., 2013 | |
| 202-1240 | ODP1240 | Mg/Ca | G. ruber | 0.5-1 | Pena et al., 2008 | |||
| 202-1242 | ODP1242 | Mg/Ca | G. ruber | 25.04 | 24.05 | 0.93 | Benway et al., 2006 | |
| TR163-19 | TR163-19P | UK'37 | 23.99 | 23.99 | 0.00 | Dubois et al., 2011 | ||
| TR163-22 | TR163-22 | Mg/Ca | G. ruber (white) | 23.66 | 22.40 | 1.27 | Lea et al., 2006 | |
| V19-27 | V19-27 | UK'37 | 24.29 | 24.50 | -0.20 | Koutavas et al., 2008 | ||
| V21-30 | V21-30 | UK'37 | 23.65 | 23.54 | 0.11 | Koutavas et al., 2008 | ||
| V21-30 | V21-30 | Mg/Ca | G. Sacculifer | 22.30 | 21.23 | 1.07 | Koutavas et al., 2002 | |
| ME0005A-27JC | ME0005A-27JC | UK'37 | 22.30 | 22.90 | -0.60 | Dubois et al., 2011 | ||
| V19-28 | V19-28 | UK'37 | 22.10 | 21.52 | 0.58 | Koutavas et al., 2008 | ||
| V19-30 | V19-30 | UK'37 | 20.51 | 20.82 | -0.30 | Koutavas et al., 2008 | ||
| KNR195-5-CDH26 | KNR195-5 CDH26 | UK'37 | 20.50 | 20.78 | -0.28 | Bova et al., 2015 |