The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Permanent El Niño-Like Conditions During the Pliocene Warm Period
Abstract
During the warm early Pliocene (∼4.5 to 3.0 million years ago), the most recent interval with a climate warmer than today, the eastern Pacific thermocline was deep and the average west-to-east sea surface temperature difference across the equatorial Pacific was only 1.5 ± 0.9°C, much like it is during a modern El Niño event. Thus, the modern strong sea surface temperature gradient across the equatorial Pacific is not a stable and permanent feature. Sustained El Niño-like conditions, including relatively weak zonal atmospheric (Walker) circulation, could be a consequence of, and play an important role in determining, global warmth.
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Cites
The NCEP/NCAR 40-Year Reanalysis Project
Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., et al. (1996) · Bulletin of the American Meteorological Society · doi:10.1175/1520-0477(1996)077<0437:tnyrp>2.0.co;2 · Cited by 28,360
Climate Change 2001: The Scientific Basis
Cooper, R. N., Houghton, J. T., McCarthy, J. J., & Metz, B. (2002) · Foreign Affairs · doi:10.2307/20033020 · Cited by 12,889
ATMOSPHERIC TELECONNECTIONS FROM THE EQUATORIAL PACIFIC1
BJERKNES, J. (1969) · Monthly Weather Review · doi:10.1175/1520-0493(1969)097<0163:atftep>2.3.co;2 · Cited by 3,551
Bemis, B. E., Spero, H. J., Bijma, J., & Lea, D. W. (1998) · Paleoceanography · doi:10.1029/98pa00070 · Cited by 1,108
Battisti, D. S., & Hirst, A. C. (1989) · Journal of the Atmospheric Sciences · doi:10.1175/1520-0469(1989)046<1687:iviata>2.0.co;2 · Cited by 897
Fedorov, A. V., & Philander, S. G. (2000) · Science · doi:10.1126/science.288.5473.1997 · Cited by 713
Regional climate shifts caused by gradual global cooling in the Pliocene epoch
Ravelo, A. C., Andreasen, D. H., Lyle, M., Olivarez Lyle, A., & Wara, M. W. (2004) · Nature · doi:10.1038/nature02567 · Cited by 675
Self-citationCore top calibration of Mg/Ca in tropical foraminifera: Refining paleotemperature estimation
Dekens, P. S., Lea, D. W., Pak, D. K., & Spero, H. J. (2002) · Geochemistry, Geophysics, Geosystems · doi:10.1029/2001gc000200 · Cited by 562
Slowdown of the meridional overturning circulation in the upper Pacific Ocean
McPhaden, M. J., & Zhang, D. (2002) · Nature · doi:10.1038/415603a · Cited by 504
Evolution of El Niño–Southern Oscillation and global atmospheric surface temperatures
Trenberth, K. E., Caron, J. M., Stepaniak, D. P., & Worley, S. (2002) · Journal of Geophysical Research: Atmospheres · doi:10.1029/2000jd000298 · Cited by 479
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Behrenfeld, M. J., O’Malley, R. T., Siegel, D. A., McClain, C. R., Sarmiento, J. L., Feldman, G. C., Milligan, A. J., Falkowski, P. G., Letelier, R. M., & Boss, E. S. (2006) · Nature · doi:10.1038/nature05317 · Cited by 2,485
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Jackson, J. B. C. (2008) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0802812105 · Cited by 611
The global monsoon across time scales: Mechanisms and outstanding issues
Wang, P. X., Wang, B., Cheng, H., Fasullo, J., Guo, Z., Kiefer, T., & Liu, Z. (2017) · Earth-Science Reviews · doi:10.1016/j.earscirev.2017.07.006 · Cited by 508
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Metadata
- Authors
- Wara, M. W., Ravelo, A. C., & Delaney, M. L.
- Venue
- Science
- Published
- 2005-07-29
- Volume
- 309
- Issue
- 5735
- Pages
- 758-761
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2006547330
- Cited by
- 674
- References
- 25
- FWCI
- 14.28
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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