Arabian Sea Cores Foraminiferal Oxygen Isotope Data Staubwasser, M.; Sirocko, F.; Grootes, P.M.; Segl, M. Staubwasser, M. Sirocko, F. Grootes, P.M. Segl, M. earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,corrected,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,averaged,null,N,210-year average) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,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/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,Number of specimans) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (63KA>LATITUDE 24.62>LONGITUDE 65.98) Planktonic oxygen isotope ratios off the Indus delta reveal climate changes with a multi-centennial pacing during the last 6 ka, with the most prominent change recorded at 4.2 ka BP. Opposing isotopic trends across the northern Arabian Sea surface at that time indicate a reduction in Indus river discharge and suggest that later cycles also reflect variations in total annual rainfall over south Asia. The 4.2 ka event is coherent with the termination of urban Harappan civilization in the Indus valley. Thus, drought may have initiated southeastward habitat tracking within the Harappan cultural domain. The late Holocene drought cycles following the 4.2 ka BP event vary between 200 and 800 years and are coherent with the evolution of cosmogenic 14C production rates. This suggests that solar variability is one fundamental cause behind Holocene rainfall changes over south Asia. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Staubwasser, M. Investigator : Sirocko, F. Investigator : Grootes, P.M. Investigator : Segl, M. 2003-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2606 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/63ka-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/staubwasser2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/63ka-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/staubwasser2003 English https://www.ncdc.noaa.gov/paleo/study/2606 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/63ka-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/staubwasser2003 Staubwasser, M., F. Sirocko, P.M. Grootes, and M. Segl. 2003. Climate change at the 4.2 ka BP termination of the Indus valley civilization and Holocene south Asian monsoon variability. Geophysical Research Letters 30:1425. START YEAR: 10962 14C yr BP * END YEAR: -40 14C yr BP 65.98 24.62 65.98 24.62