Hoti Cave, Oman 9-6 KYrBP Stalagmite Oxygen Isotope Data Neff, U.; Burns, S.J.; Mangini, A.; Mudelsee, M.; Fleitmann, D.; Matter, A. Neff, U. Burns, S.J. Mangini, A. Mudelsee, M. Fleitmann, D. Matter, A. Intertropical Convergence Zone (ITCZ) Monsoon earth science/paleoclimate/speleothems (age,null,null,calendar year before present,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (Hoti Cave>LATITUDE 23.08>LONGITUDE 57.35) Variations in the amount of solar radiation reaching the Earth are thought to influence climate, but the extent of this influence on timescales of millennia to decades is unclear. A number of climate records show correlations between solar cycles and climate, but the absolute changes in solar intensity over the range of decades to millennia are small and the influence of solar flux on climate is not well established. The formation of stalagmites in northern Oman has recorded past northward shifts of the intertropical convergence zone, whose northward migration stops near the southern shoreline of Arabia in the present climate. Here we present a high-resolution record of oxygen isotope variations, for the period from 9.6 to 6.1 kyr before present, in a Th-U-dated stalagmite from Oman. The d18O record from the stalagmite, which serves as a proxy for variations in the tropical circulation and monsoon rainfall, allows us to make a direct comparison of the d18O record with the D14C record from tree rings, which largely reflects changes in solar activity. The excellent correlation between the two records suggests that one of the primary controls on centennial- to decadal-scale changes in tropical rainfall and monsoon intensity during this time are variations in solar radiation. STUDY NOTES: High-resolution stalagmite oxygen isotope data for 9-6 KYrBP from Hoti Cave, Oman. Hoti cave is located in northern Oman, on the southwestern side of the Oman mountains. The modern climate of the area is arid to semi-arid, and the area is not at present affected by the Indian Ocean monsoon system. Stalagmite H5 from Hoti cave is dated with 12 Th-U ages, and the d18O record covers 9.6 to 6.1 kyr before present. The Hoti cave d18O record provides a high-resolution time series of the intensity of Indian Ocean monsoonal rainfall. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Neff, U. Investigator : Burns, S.J. Investigator : Mangini, A. Investigator : Mudelsee, M. Investigator : Fleitmann, D. Investigator : Matter, A. 2010-10-13 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/9640 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.xls https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/speleothem/cave-hoti-h5.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.xls https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/speleothem/cave-hoti-h5.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.txt English https://www.ncdc.noaa.gov/paleo/study/9640 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.xls https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/speleothem/cave-hoti-h5.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/oman/hoti2001.txt Neff, U., S.J. Burns, A. Mangini, M. Mudelsee, D. Fleitmann, and A. Matter. 2001. Strong coherence between solar variability and the monsoon in Oman between 9 and 6 kyr ago. Nature, Vol. 411, pp. 290-293, 17 May 2001. START YEAR: 9607 cal yr BP * END YEAR: 6026 cal yr BP 57.35 23.08 57.35 23.08