noaa-ocean-26670 Western Equatorial Pacific Sea Surface and Subsurface Temperature and Mg/Ca Data over the last 4 million years Ford, H.L.; Ravelo, A.C. Western Equatorial Pacific Sea Surface and Subsurface Temperature and Mg/Ca Data over the last 4 million years 2019-04-25 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26670 Investigator H.L. Ford Investigator A.C. Ravelo earth science paleoclimate paleocean trace metals in carbonates earth science paleoclimate paleocean reconstruction geoscientificInformation Sea Surface Temperature Reconstruction 3971000 cal yr BP 3000 cal yr BP Complete .318333 .318333 159.361667 159.361667 -2520 -2520 Ocean Pacific Ocean Western Pacific Ocean ODP 806>LATITUDE .318333>LONGITUDE 159.361667 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Ford, Heather L. and Ravelo, A. Christina 2019 Paleoceanography and Paleoclimatology 34 2-15 10.1029/2018PA003461

The Western Equatorial Pacific (WEP) warm pool, with surface temperatures >28 °C and a deep thermocline, is an important source of latent and sensible heat for the global climate system. Because the tropics are not sensitive to ice‐albedo feedbacks, the WEP's response to radiative forcing can be used to constrain a minimum estimate of Earth system sensitivity. Climate modeling of pCO2-radiative warming projections shows little change in WEP variability; here we use temperature distributions of individual surface and subsurface dwelling fossil foraminifera to evaluate past variability and possible radiative and dynamic climate forcing over the Plio-Pleistocene. We investigate WEP warm pool variability within paired glacial-interglacial (G-IG) intervals for four times: the Holocene-Last Glacial Maximum, ~2, ~3, and ~4 Ma. Our results show that these surface and subsurface temperature distributions are similar for all G-IG pairs, indicating no change in variability, even as pCO2-radiative forcing and other boundary conditions changed on G-IG timescales. Plio-Pleistocene sea surface temperature (SST) distributions are similar to those from the Holocene, indicating WEP SSTs respond to pCO2-radiative forcing and associated feedbacks. In contrast, Plio-Pleistocene subsurface temperature distributions suggest subsurface temperatures respond to changes in thermocline temperature and depth. We estimate tropical temperature sensitivity for the mid-Pliocene (~3 Ma) using our individual foraminifera SST data set and a previously published high-resolution boron isotope-based pCO2 reconstruction. We find tropical temperature sensitivity was equal to, or less than, that of the Late Pleistocene. STUDY NOTES: Provided Keywords: T. sacculifer, G. tumida, sea surface temperature, subsurface temperature

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/ford2019/ford2019-odp806.txt NOAA Template File; ODP 806 Surface, Subsurface Temperature and Mg/Ca Data USA/NOAA DIF Version 9.8.4 2019-04-29 2019-04-29