noaa-tree-20305 African Tree-Ring 250 Year d13C and Intrinsic Water-Use Efficiency (iWUE) Wils, T.H.G.; Robertson, I.; Woodborne, S.; Hall, G.; Koprowski, M.; Eshetu, Z. African Tree-Ring 250 Year d13C and Intrinsic Water-Use Efficiency (iWUE) 2016-07-05 NCDC-Paleoclimatology ONLINE Files 10.25921/pwzb-3a76 https://www.ncdc.noaa.gov/paleo/study/20305 Investigator T.H.G. Wils Investigator I. Robertson Investigator S. Woodborne Investigator G. Hall Investigator M. Koprowski Investigator Z. Eshetu earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Koichab Valley earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Koichab Valley earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kuskuam K7A earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam K4C earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam K5C earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Hugumburda earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam K3A earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kuskuam K3A earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kuskuam K5C earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kuskuam K6A earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam K7A earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam mean earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kwazulu-Natal earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kuskuam K4C earth science paleoclimate climate reconstructions|tree ring intrinsic water use efficiency,null,95% confidence interval upper bound,micromole per mole,null,climate reconstructions|tree ring,null,null,N,Kuskuam K6A earth science paleoclimate tree ring age,null,null,year Common Era,null,tree ring,null,null,N,null earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,composited,isotope ratio mass spectrometry,N,Kuskuam mean earth science paleoclimate tree ring delta 13C,alpha cellulose,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Hugumburda earth science paleoclimate tree ring delta 13C,wood,null,per mil VPDB,null,tree ring,null,isotope ratio mass spectrometry,N,Kwazulu-Natal earth science paleoclimate tree-ring carbon isotopes geoscientificInformation 1755 AD 2006 AD 195 cal yr BP -56 cal yr BP Complete -29.7167 12.6167 15.8667 39.5 Continent Africa AfricaSE>LATITUDE >LONGITUDE None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Tommy H.G. Wils, Iain Robertson, Stephan Woodborne, Grant Hall, Marcin Koprowski, Zewdu Eshetu 2016 Journal of Quaternary Science 31 4 386-390 10.1002/jqs.2865 http://onlinelibrary.wiley.com/doi/10.1002/jqs.2865/abstract

Rising atmospheric CO2 concentrations affect climate directly through radiative effects and indirectly by changing plant water-use efficiency. Under global warming scenarios these widely reported changes will have a substantial impact on future bush encroachment, crop yields, river flow and climate feedbacks. Tree-ring intrinsic water-use efficiency (iWUE) records for Africa show a 24.6% increase over the 20th century. As high iWUE can partly counterbalance projected decreases in regional precipitation, this research has important implications for those involved in water resource management and highlights the need for climate models to take physiological forcing into account. STUDY NOTES: Annual carbon isotope and intrinsic water-use efficiency values from 8 trees from Ethiopia, Namibia, and South Africa IITRDB15

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/africa/africa2016d13c-iwue.txt Data File; African Tree-Ring d13C and Intrinsic Water-Use Efficiency (iWUE) USA/NOAA DIF Version 9.8.4 2019-03-01 2019-03-01