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    Scientific Merits and Analytical Challenges ofTree-Ring Densitometry
/ J. Bjorklund [et al.] // Rev. Geophys., DOI 10.1029/2019RG000642. - Cited References:274. - We sincerely thank three anonymous referees for valuable critique to an earlier version of the manuscript. We further acknowledge the shared expertise of Etienne Szymanski and Peter Herter of WALESCH Electronic and Anders Rindby of Cox Analytical Systems during a workshop arranged as part of the coordination of the intercomparison experiment (section of this review). We thank two diligent technicians: Patrick Zust and Basil Frefel for assistance in producing the wood anatomically based data set. This work was mainly funded by the Swiss National Science Foundation (Grants iTREE CRSII3_136295 and P300P2_154543). J. B. further gratefully acknowledges financial support by the Transnational Access to Research Infrastructures activity in the 7th Framework Programme of the EC under the Trees4Future project (284181). G. v. A. was supported by a grant from the Swiss State Secretariat for Education, Research and Innovation SERI (SBFI C14.0104). J. B. and G. v. A. were also supported by the Swiss National Science Foundation (SNSF; Project XELLCLIM 200021_182398). M. R. acknowledges funding through the EVA4.0 project (CZ.02.1.01/0.0/0.0/16_019/0000803). P. F. was supported by the Swiss National Science Foundation (Grants 150205 and LOTFOR). T. D. M was supported by Ghent University Special Research Fund PhD grant (BOF. DOC.2014.0037.01). R. K. and K. J. were supported by the National Science Centre project DEC-2013/11/B/ST10/04764 (Poland). A. H. and R. S.-S. are grateful to Juan Majada for providing support for this study and Laura Gonzalez Sanchez, Mara Arrojo, and Fernando Quintana who assisted in the CETEMAS laboratory. R. S.-S. was supported by a postdoctoral grant (IJCI-2015-25845, FEDER funds). A. V. K. was supported by the Russian Science Foundation (Project 18-1400072). J. E, C. H., and M. K. were supported by the German Science Foundation (Grants Inst 247/665-1 FUGG, ES 161/9-1, and HA 8048/1-1). M. W. and T. S. were supported by the Leibnitz Association (project BaltRap) and M. W. by the German Science Foundation (GrantsInst 247/665-1 FUGG, ES 161/9-1, and Wi 2680/8-1). K. N. was supported by the Austrian Science Fund FWF (Grant I 1183-N19). L. A.-H., R. O., and R. D. were supported by the U.S. National Science Foundation (NSF) Grants AGS-15-02150, PLR-15-04134, and PLR-1603473. U. B. received funding from the project "SustES - Adaptation strategies for sustainable ecosystem services and food security under adverse environmental conditions"(CZ.02.1.01/0.0/0.0/16_019/0000797). R. W. was supported by NERC Grant NE/K003097/1. N. J. L. received support from the UK NERC (NE/P011527/1) and EU project "Millennium" (017008). M. M. and V. T. were supported by U.S. NSF CAREER Grant AGS-1349942. I.M. and R.V. were partially supported by the BNP Paribas Foundation (Award THEMES). Data produced for this study are made available through the Supporting Information (Data S1), where also meta data (technique and parameterization) for each data set are described (Tables S1-S3 of Data S2). . - Article in press. - ISSN 8755-1209. - ISSN 1944-9208
РУБ Geochemistry & Geophysics

Аннотация: X-ray microdensitometry on annually resolved tree-ring samples has gained an exceptional position in last-millennium paleoclimatology through the maximum latewood density (MXD) parameter, but also increasingly through other density parameters. For 50 years, X-ray based measurement techniques have been the de facto standard. However, studies report offsets in the mean levels for MXD measurements derived from different laboratories, indicating challenges of accuracy and precision. Moreover, reflected visible light-based techniques are becoming increasingly popular, and wood anatomical techniques are emerging as a potentially powerful pathway to extract density information at the highest resolution. Here we review the current understanding and merits of wood density for tree-ring research, associated microdensitometric techniques, and analytical measurement challenges. The review is further complemented with a careful comparison of new measurements derived at 17 laboratories, using several different techniques. The new experiment allowed us to corroborate and refresh "long-standing wisdom" but also provide new insights. Key outcomes include (i) a demonstration of the need for mass/volume-based recalibration to accurately estimate average ring density; (ii) a substantiation of systematic differences in MXD measurements that cautions for great care when combining density data sets for climate reconstructions; and (iii) insights into the relevance of analytical measurement resolution in signals derived from tree-ring density data. Finally, we provide recommendations expected to facilitate futureinter-comparability and interpretations for global change research.

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Держатели документа:
Swiss Fed Inst Forest Snow & Landscape Res WSL, Birmensdorf, Switzerland.
Czech Univ Life Sci, Fac Forestry & Wood Sci, Prague, Czech Republic.
Gothenburg Univ, Ctr Earth Sci, Lab Dendrochronol, Gothenburg, Sweden.
Univ St Andrews, Sch Earth & Environm Sci, St Andrews, Fife, Scotland.
Columbia Univ, Lamont Doherty Earth Observ, Tree Ring Lab, New York, NY USA.
Univ Ghent, Fac Biosci Engn, UGent Woodlab, Lab Wood Technol,Dept Environm, Ghent, Belgium.
Univ Ghent, Ctr Xray Tomog UGCT, Ghent, Belgium.
Tech Univ Dresden, Inst Forest Utilizat & Forest Technol, Dresden, Germany.
Swansea Univ, Dept Geog, Swansea, W Glam, Wales.
Ernst Moritz Arndt Univ Greifswald, Dendrogreif, Greifswald, Germany.
Univ Cambridge, Dept Geog, Cambridge, England.
William Paterson Univ, Dept Environm Sci, Wayne, NJ 07470 USA.
Johannes Gutenberg Univ Mainz, Dept Geog, Mainz, Germany.
Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden.
Forest & Wood Technol Res Ctr CETEMAS, Asturias, Spain.
Univ Huelva, Dept Ciencias Agroforestales, Huelva, Spain.
Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China.
Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China.
Univ Silesia, Fac Earth Sci, Katowice, Poland.
Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Ecol & Geog, Krasnoyarsk, Russia.
Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA.
Consejo Nacl Invest Cient & Tecn, Inst Argentino Nivol Glaciol & Ciencias Ambiental, Mendoza, Argentina.
UNCuyo, Fac Ciencias Exactas & Nat, Mendoza, Argentina.
Univ Innsbruck, Inst Geog, Innsbruck, Austria.
Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, Seville, Spain.
Nat Resources Inst, Joensuu, Finland.

Доп.точки доступа:
Bjorklund, J.; von Arx, G.; Nievergelt, D.; Wilson, R.; Van den Bulcke, J.; Gunther, B.; Loader, N. J.; Rydval, M.; Fonti, P.; Scharnweber, T.; Andreu-Hayles, L.; Buntgen, U.; D'Arrigo, R.; Davi, N.; De Mil, T.; Esper, J.; Gartner, H.; Geary, J.; Gunnarson, B. E.; Hartl, C.; Hevia, A.; Song, H.; Janecka, K.; Kaczka, R. J.; Kirdyanov, A. V.; Kochbeck, M.; Liu, Y.; Meko, M.; Mundo, I.; Nicolussi, K.; Oelkers, R.; Pichler, T.; Sanchez-Salguero, R.; Schneider, L.; Schweingruber, F.; Timonen, M.; Trouet, V.; Van Acker, J.; Verstege, A.; Villalba, R.; Wilmking, M.; Frank, D.; Wilson, Rob; liu, yu; Swiss National Science FoundationSwiss National Science Foundation (SNSF) [iTREE CRSII3_136295, P300P2_154543, 150205]; Transnational Access to Research Infrastructures activity in the 7th Framework Programme of the EC under the Trees4Future project [284181]; Swiss State Secretariat for Education, Research and Innovation SERI [SBFI C14.0104]; Swiss National Science Foundation (SNSF)Swiss National Science Foundation (SNSF) [XELLCLIM 200021_182398]; EVA4.0 project [CZ.02.1.01/0.0/0.0/16_019/0000803]; Ghent UniversityGhent University [BOF. DOC.2014.0037.01]; National Science Centre (Poland) [DEC-2013/11/B/ST10/04764]; FEDER fundsEuropean Union (EU) [IJCI-2015-25845]; Russian Science FoundationRussian Science Foundation (RSF) [18-1400072]; German Science FoundationGerman Research Foundation (DFG) [Inst 247/665-1 FUGG, ES 161/9-1, HA 8048/1-1, Wi 2680/8-1]; Leibnitz Association (project BaltRap); Austrian Science Fund FWFAustrian Science Fund (FWF) [I 1183-N19]; U.S. National Science Foundation (NSF)National Science Foundation (NSF) [AGS-15-02150, PLR-15-04134, PLR-1603473]; project "SustES - Adaptation strategies for sustainable ecosystem services and food security under adverse environmental conditions" [CZ.02.1.01/0.0/0.0/16_019/0000797]; NERCNERC Natural Environment Research Council [NE/K003097/1]; UK NERCNERC Natural Environment Research Council [NE/P011527/1]; EU project "Millennium" [017008]; U.S. NSF CAREER GrantNational Science Foundation (NSF) [AGS-1349942]; BNP Paribas Foundation (Award THEMES)