Delta Oxygen-18 and SEA SURFACE TEMPERATURE collected from KNORR in Equatorial Pacific Ocean from 0862-01-01 to 2009-01-01 (NCEI Accession 0142201)
Tropical Pacific Ocean dynamics during the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) are poorly characterized due to lack of evidence from the eastern equatorial Pacific. We reconstructed sea surface temperature, El Niño– Southern Oscillation (ENSO) activity, and the tropical Pacific zonal gradient for the past millennium from Galápagos ocean sediments. We document a “Mid - Millennium Shift” (MMS) in ocean - atmosphere circulation ~1500 -1650 CE, from a state with strong zonal gradient and dampened ENSO to one with weak gradient and amplified ENSO. The MMS coincided with deepest LIA cooling and was likely caused by southward shift of the Intertropical Convergence Zone. Peak MCA (900 - 1150 CE) was a warm period in the eastern Pacific, contradicting the paradigm of a persistent La Niña pattern.
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| description | Tropical Pacific Ocean dynamics during the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) are poorly characterized due to lack of evidence from the eastern equatorial Pacific. We reconstructed sea surface temperature, El Niño– Southern Oscillation (ENSO) activity, and the tropical Pacific zonal gradient for the past millennium from Galápagos ocean sediments. We document a “Mid - Millennium Shift” (MMS) in ocean - atmosphere circulation ~1500 -1650 CE, from a state with strong zonal gradient and dampened ENSO to one with weak gradient and amplified ENSO. The MMS coincided with deepest LIA cooling and was likely caused by southward shift of the Intertropical Convergence Zone. Peak MCA (900 - 1150 CE) was a warm period in the eastern Pacific, contradicting the paradigm of a persistent La Niña pattern. |
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| identifier | gov.noaa.nodc:0142201 |
| issued | 2016-02-11T00:00:00.000+00:00 |
| keyword |
[
"0142201",
"CORE AGE",
"DELTA CARBON-13",
"Delta Oxygen-18",
"SEA SURFACE TEMPERATURE",
"SEDIMENTS",
"mass spectrometer",
"laboratory analyses",
"sediment analysis",
"R/V Knorr",
"Lamont-Doherty Earth Observatory",
"Equatorial Pacific Ocean",
"oceanography",
"COLUMBIA/LDEO > Lamont-Doherty Earth Observatory, Columbia University",
"EARTH SCIENCE > OCEANS > MARINE SEDIMENTS",
"EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY",
"EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN",
"EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE",
"MASS SPECTROMETERS > MASS SPECTROMETERS",
"Ships",
"KNORR (call sign: KCEJ, ICES code: 316N, 1970-)",
"OCEAN > PACIFIC OCEAN",
"KJY7N8"
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| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2016-02-16T00:00:00.000+00:00 |
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| spatial | -89.0,-1.5,-90.0,0.0 |
| temporal | 0862-01-01T00:00:00+00:00/2009-01-01T00:00:00+00:00 |
| title | Delta Oxygen-18 and SEA SURFACE TEMPERATURE collected from KNORR in Equatorial Pacific Ocean from 0862-01-01 to 2009-01-01 (NCEI Accession 0142201) |
