Ras Umm Sidd, Egypt 245 Year Winter Coral Oxygen Isotope Data Felis, T.; Mudelsee, M. Felis, T. Mudelsee, M. earth science/paleoclimate/ (age,null,null,year Common Era,null,,null,null,N,mid-February of any given year) earth science/paleoclimate/corals and sclerosponges (delta 18O,Porites sp.,null,per mil VPDB,null,corals and sclerosponges,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (Ras Umm Sidd>LATITUDE 27.848333>LONGITUDE 34.31) The Red Sea is a deep marine basin often considered as small-scale version of the global ocean. Hydrographic observations and ocean-atmosphere modeling indicate Red Sea deep water was episodically renewed by wintertime open-ocean deep convections during 1982-2001, suggesting a renewal time on the order of a decade. However, the long-term pacing of Red Sea deep water renewals is largely uncertain. We use an annually resolved coral oxygen isotope record of winter surface water conditions to show that the late twentieth century deep water renewals were probably unusual in the context of the preceding ~100 years. More frequent major events are detected during the late Little Ice Age, particularly during the early nineteenth century characterized by large tropical volcanic eruptions. We conclude that Red Sea deep water renewal time is on the order of a decade up to a century, depending on the mean climatic conditions and large-scale interannual climate forcing. STUDY NOTES: Winter (mid February) coral oxygen isotope (d18O) data from Ras Umm Sidd, Egypt, during the past 245 years NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Felis, T. Investigator : Mudelsee, M. 2019-06-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/27010 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/red_sea/ras-umm-sidd2019d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/red_sea/ras-umm-sidd2019d18o.txt English https://www.ncdc.noaa.gov/paleo/study/27010 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/red_sea/ras-umm-sidd2019d18o.txt Thomas Felis and Manfred Mudelsee2019Pacing of Red Sea Deep Water Renewal During the Last CenturiesGeophysical Research Letters4684413-442010.1029/2019GL082756https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082756 START YEAR: 1751 AD * END YEAR: 1995 AD 34.31 27.848333 34.31 27.848333