Arabian Sea ODP722 11ma Leaf Wax Stable Isotope Data Huang, Y.; Clemens, S.C.; Liu, W.; Wang, Y.; Prell, W.L. Huang, Y. Clemens, S.C. Liu, W. Wang, Y. Prell, W.L. earth science/paleoclimate/paleoceanography (depth,null,null,meter,null,paleoceanography,null,null,N,meters below sea floor) earth science/paleoclimate/paleoceanography (delta 2H,C31 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,total alkanes) earth science/paleoclimate/paleoceanography (age,null,null,million years ago,null,paleoceanography,null,null,N,Cande and Kent 1995) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,site; see Zachos et al. 2001; supplemental data for sources) earth science/paleoclimate/paleoceanography (C25 n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil,null,paleoceanography,corrected,isotope ratio mass spectrometry,N,adjusted: CIB (+0.64); NUT (+0.45) (see Shackleton et al. 1984; Shackleton and Hall 1997)) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil,null,paleoceanography,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil,null,paleoceanography,corrected|smoothed,isotope ratio mass spectrometry,N,5-point running average; adjusted: CIB (+0.64); NUT (+0.45) (see Shackleton et al. 1984; Shackleton and Hall 1997)) earth science/paleoclimate/paleoceanography (Globigerina bulloides,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,foraminifera genus) earth science/paleoclimate/paleoceanography (alkenone,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (average chain length,n-alkane,null,count,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (organic carbon,null,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,million years ago,null,paleoceanography,null,null,N,Berggren 1985) earth science/paleoclimate/climate reconstructions|paleoceanography (age,null,null,million years ago,null,climate reconstructions|paleoceanography,null,null,N,Berggren 1985) earth science/paleoclimate/paleoceanography (C31 n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,million years ago,null,paleoceanography,null,null,N,AM12 Cande and Kent 1995) earth science/paleoclimate/paleoceanography (age,null,null,million years ago,null,paleoceanography,null,null,N,AM12) earth science/paleoclimate/paleoceanography (delta 13C,C29 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,C33 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C37:2 alkenone,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C29 n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil,null,paleoceanography,smoothed,isotope ratio mass spectrometry,N,5-point running average) earth science/paleoclimate/paleoceanography (sample identification,null,null,null,null,paleoceanography,null,null,C,hole) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,source) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 2H,C33 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (age,null,null,million years ago,null,climate reconstructions|paleoceanography,null,null,N,Cande and Kent 1995) earth science/paleoclimate/paleoceanography (delta 13C,C31 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C37:3 alkenone,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,million years ago,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C33 n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (depth,null,null,meter,null,climate reconstructions|paleoceanography,null,null,N,meters below sea floor) earth science/paleoclimate/paleoceanography (delta 13C,C27 n-alkane,null,per mil,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (C27 n-alkane,null,null,nanogram per gram,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP722>LATITUDE 16.62>LONGITUDE 59.8) Carbon isotope changes in paleosols from Siwalik, Pakistan, and marine sediments from the Bengal Fan indicate a major C4 plant expansion in the Himalayan foreland during the late Miocene. However, the timing and mechanisms behind the C4 plant expansion remain enigmatic. Here we present high-resolution (~60 k.y.) biomarker and compound-specific isotope data spanning the past 11 m.y. from Ocean Drilling Program Site 722 in the Arabian Sea. An ~5-6 permil increase in leaf wax d13C values indicates a marked rise of C4 plants from 10 to 5.5 Ma, with accelerated expansion from 7.9 to 5.5 Ma. A concurrent ~50 permil rise in leaf wax dD values is attributed to a combined effect of changes in precipitation amount and evaporation, indicating that source regions for the plant waxes became progressively drier from 10 to 5.5 Ma. In contrast to earlier reports, our isotope records, biomarker abundances, alkenone UK'37, and Globigerina bulloides abundance data do not suggest enhanced summer monsoon circulation during this time interval. Rather, our results suggest that large-scale hydrological changes drove the late Miocene expansion of C4 plants in the Himalayan foreland and Arabian Peninsula. STUDY NOTES: Biomarker and compound-specific isotope data, plus foraminiferal census and isotope data, from Ocean Drilling Program Site 722 in the Arabian Sea, spanning the past 11 m.y. Also included are paleosol carbon and oxygen isotope data from several locations in Pakistan. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Huang, Y. Investigator : Clemens, S.C. Investigator : Liu, W. Investigator : Wang, Y. Investigator : Prell, W.L. 2017-09-27 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22691 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007bulloides.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007corg.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007soiliso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007biomarker.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007bulloides.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007corg.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007soiliso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007biomarker.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007iso.txt English https://www.ncdc.noaa.gov/paleo/study/22691 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007bulloides.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007corg.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007soiliso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007biomarker.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/huang2007/huang2007iso.txt Yongsong Huang, Steven C. Clemens, Weiguo Liu, Yi Wang, Warren L. Prell 2007Large-scale hydrological change drove the late Miocene C4 plant expansion in the Himalayan foreland and Arabian PeninsulaGeology356531-53410.1130/G23666A.1https://pubs.geoscienceworld.org/geology/article-lookup/35/6/531 START YEAR: 67517300 cal yr BP * END YEAR: 0 cal yr BP 59.8 16.62 59.8 16.62