Western Pacific Stable Isotope Data Around the Intertropical Convergence Zone during the Last Glacial Maximum Leech, P.J.; Lynch-Stieglitz, J.; Zhang, R. Leech, P.J. Lynch-Stieglitz, J. Zhang, R. Intertropical Convergence Zone (ITCZ) Last Glacial Maximum earth science/paleoclimate/paleoceanography (number of samples,null,null,null,null,paleoceanography,null,null,N,Number of foraminifera in analysis) earth science/paleoclimate/paleoceanography (delta 13C,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globorotalia tumida,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (VM28-233>LATITUDE -6.3>LONGITUDE 161.4) (VM28-229>LATITUDE -8.4>LONGITUDE 167.8) (VM28-227>LATITUDE -10.7>LONGITUDE 168.7) (GGC-49>LATITUDE 7.9>LONGITUDE 139.5) (VM28-246>LATITUDE 14.4>LONGITUDE 142.7) (VM28-235>LATITUDE -5.5>LONGITUDE 160.5) (VM28-213>LATITUDE -14.9>LONGITUDE 176.2) (VM24-150>LATITUDE -2.2>LONGITUDE 155.7) (VM19-110>LATITUDE 11.9>LONGITUDE 140.1) (RC17-176>LATITUDE 3.8>LONGITUDE 158.8) (VM28-230>LATITUDE -5.5>LONGITUDE 166.8) (VM28-236>LATITUDE -3.6>LONGITUDE 162) (VM28-234>LATITUDE -7.1>LONGITUDE 159) (VM34-2>LATITUDE -17.7>LONGITUDE 176.1) (VM24-110>LATITUDE 2.4>LONGITUDE 156.7) Paleoclimate proxy evidence suggests a southward shift of the Intertropical Convergence Zone (ITCZ) during times of Northern Hemisphere cooling, including the Last Glacial Maximum, 19–23 ka before present. However, evidence for movement over the Pacific has mainly been limited to precipitation reconstructions near the continents, and the position of the Pacific marine ITCZ is less well constrained. In this study, we address this problem by taking advantage of the fact that the upper ocean density structure reflects the overlying wind field. We reconstruct changes in the upper ocean density structure during the LGM using oxygen isotope measurements on the planktonic foraminifera G. ruber and G. tumida in a transect of sediment cores from the Western Tropical Pacific. The data suggests a ridge in the thermocline just north of the present-day ITCZ persists for at least part of the LGM, and a structure in the Southern Hemisphere that differs from today. The reconstructed structure is consistent with that produced in a General Circulation Model with both a Northern and Southern Hemisphere ITCZ. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Leech, P.J. Investigator : Lynch-Stieglitz, J. Investigator : Zhang, R. 2014-11-06 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17415 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-236.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm19-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-150.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-227.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-ggc49.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-246.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-213.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-229.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-233.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-rc17-176.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235tw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-234.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-230.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm34-2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-236.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm19-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-150.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-227.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-ggc49.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-246.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-213.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-229.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-233.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-rc17-176.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235tw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-234.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-230.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm34-2.txt English https://www.ncdc.noaa.gov/paleo/study/17415 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-236.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm19-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-150.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-227.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-ggc49.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-246.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm24-110.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-213.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-229.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-233.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-rc17-176.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235tw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-234.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-230.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm28-235.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/leech2013/leech2013-vm34-2.txt Leech, P.J., J. Lynch-Stieglitz and R. Zhang2013Western Pacific thermocline structure and the Pacific marine Intertropical Convergence Zone during the Last Glacial MaximumEarth and Planetary Science Letters363133-14310.1016/j.epsl.2012.12.026 139.5 -17.7 176.2 14.4