Drysdale et al. 2006 Buca della Renella, Italy Flowstone Data Drysdale, R.N.; Zanchetta, G.; Hellstrom, J.C.; Maas, R.; Fallick, A.E.; Pickett, M.; Cartwright, I.; Piccini, L. Drysdale, R.N. Zanchetta, G. Hellstrom, J.C. Maas, R. Fallick, A.E. Pickett, M. Cartwright, I. Piccini, L. earth science/paleoclimate/speleothems (magnesium/calcium,calcium carbonate,null,mole per mole,null,speleothems,raw,inductively-coupled plasma atomic emission spectroscopy,N,null) earth science/paleoclimate/speleothems (fluorescence,calcium carbonate,null,nanometer,null,speleothems,raw,fluorescence spectroscopy,N,fluorescence emission wavelength) 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 (age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 13C,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems (Buca della Renella>LATITUDE 44.08>LONGITUDE 10.21) A severe drought in parts of low-latitude northeastern Africa and southwestern Asia ~4200 yr ago caused major disruption to ancient civilizations. Stable isotope, trace element, and organic fluorescence data from a calcite flowstone collected from the well-watered Alpi Apuane karst of central-western Italy indicate that the climatic event responsible for this drought was also recorded in mid-latitude Europe. Although the timing of this event coincides with an episode of increased ice-rafted debris to the subpolar North Atlantic, the regional ocean-atmosphere response seems atypical of similar Holocene ice-rafting events. Furthermore, comparison of the flowstone data with other regional proxies suggests that the most extreme part of the dry spell occurred toward the end of a longer-term climate anomaly. STUDY NOTES: Stable isotope, Mg/Ca, and fluorescence data from flowstone sample RL4 from Buca della Renella, west central Italy, ~44°N, ~10°E. Flowstone d18O and d13C values were determined by gas-source mass spectrometry. Mg and Ca concentrations using standard inductively coupled plasma atomic emission spectroscopy. Fluorescence measurements were made directly from RL4 using a fiber-optic probe coupled to a Varian Cary Eclipse spectrophotometer. 230Th/234U dating was performed on thirteen 20–30 mg samples. Age age_calkaBP 2.68 is averages for Fluorescence column PI submitted the following information age_calkaBP Fluores_carb 2.68 452 2.68 459 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Drysdale, R.N. Investigator : Zanchetta, G. Investigator : Hellstrom, J.C. Investigator : Maas, R. Investigator : Fallick, A.E. Investigator : Pickett, M. Investigator : Cartwright, I. Investigator : Piccini, L. 2007-09-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5537 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.txt English https://www.ncdc.noaa.gov/paleo/study/5537 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/italy/renella2006.txt Russell Drysdale, Giovanni Zanchetta, John Hellstrom, Roland Maas, Anthony Fallick, Matthew Pickett, Ian Cartwright, and Leonardo Piccini2006Late Holocene drought responsible for the collapse of Old World civilizations is recorded in an Italian cave flowstoneGeology342101-10410.1130/G22103.1http://geology.gsapubs.org/content/34/2/101.abstract START YEAR: -5050 AD * END YEAR: 680 AD 10.21 44.08 10.21 44.08