Claudia Hartl

Claudia_Hartl-Meier_174Dr. rer. nat.

Research Associate
Institute of Geography
Room 02-274
Phone: + 49 6131 39 23183
Personal website:

Consultation hours:
Upon agreement


Biographical data (detailed CV here)

  • 03/2015 - PhD thesis at the Department of Forst Nutrition and Water Resources, Technische Universität München, Germany
    Original thesis title: "Dendroökologische Untersuchungen zum Einfluss der Klimaänderung auf Bergwälder der Nördlichen Kalkalpen"
    Translated thesis title: "Influence of climate change on mountain forests in the Northern Limestone Alps - a dendrochronological approach"
  • Since 09/2013 - Research Associate, Department of Geography, Johannes Gutenberg University, Mainz
  • 03/2010 - 08/2013 Ph.D. Student, Department of Forest Nutrition and Water Resources, Technische Universität München, Germany and Research Assistant, Faculty of Forestry, University of Applied Sciences, Weihenstephan-Triesdorf, Germany
  • 09/2011 - 10/2011 Visiting Scientist, Group Dendroclimatology, Research Unit Landscape Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
  • 11/2010 - 12/2010 Visiting Scientist, Group Dendroclimatology, Research Unit Landscape Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Switzerland
  • 10/2003 - 10/2009 Diploma in Geography, University of Regensburg, Germany

Research Interests

  • Dendroclimatology
  • Dendroecology
  • Drought Responses
  • Vegetation Responses
  • Climate Change
  • Forest Ecosystems
  • Extreme Events
  • Disturbance Ecology

Funded Projects

  • “Imprints of volcanic degassing in tree rings” | Rhineland-Palatinate Research Initiative: Terrestrial Magmatic Systems (TeMaS)
  • “Producing an enhanced millennium-length temperature reconstruction from tree-ring density for the European Alps” | German Research Foundation
  • “Climate signals in tree-ring maximum late wood density from the 'Sierras de Cazorla', Spain” | Internal University Research Funding, JGU Mainz
  • “Dendrochronological studies on the response of sycamore to climatic changes in the Northern Limestone Alps” | Bavarian State Forestry Administration
  • "Sustainable Management of Forest Sites in the Calcareous Alps - SicAlp" | European Regional Development Fund, INTERREG Bayern-Österreich 2007 - 2013
  • "Growth and stability of mountain forest ecosystems in the Berchtesgaden National Park" | Bavarian State Forestry Administration


    TRACE conference 09.-12.05.2012, Potsdam and Eberswalde, Germany

Media Interviews

  • National Geographic, Enthüllt: Geheimnisse der Meere Staffel 2 Folge 12, "Hitlers Kampfschiffe", 22nd Feb 2020
  • National Geographic, USA, Drain the Oceans Season 2 Episode 12, “Hitler’s Killer Warships”, 23rd Sept 2019
  • EGU 2018 General Assembly Press Conference, “From droughts to war: forests under pressure”, 11th Apr 2018
  • BBC NEWS, UK, “Tirpitz engagement recorded in trees”, 11th Apr 2018
  • BBC NEWS, UK , “Nazi legacy found in Norwegian trees”, 11th Apr 2018
  • EOS, “Tree Rings Tell a Tale of Wartime Privations”, 11th Apr 2018
  •, “Whispering pines: Trees tell story of WWII battleship”, 11th Apr 2018
  • SWR Aktuell Rheinland-Pfalz, “Im Tarnnebel versteckt – Bäume führen Mainzer Forscher zu Kriegsschiff”, 17th May 2018


In Review

45. Bodesheim P, Babst F, Frank D, Hartl C, Zang C, Jung M, Reichstein M, and Mahecha M (in review) Predicting spatiotemporal variability in radial tree growth at continental scales with machine learning. Earth System Science Data.

44. Dorado-Liñán I, Ayarzagüena B, Babst F, Xu G, Gil L , Battipaglia G, Buras A, Cada V, Camarero JJ, Cavin L, Claessens H, Drobyshev I, Garamszegi B, Grabner M, Hacket-Pain A, Hartl C, Hevia A, Janda P ... & Trouet V (in review) Jet stream position explains regional anomalies in European forest productivity. Nature Communications.

43. Römer P, Hartl C, Schneider L, Bräuning A, Szymczak S, Huneau F, Lebre S, Reinig F, Büntgen U, Esper J (in review) Reduced Temperature Sensitivity of Maximum Latewood Density Formation in High-Elevation Corsican Pines under Recent Warming. Atmosphere.

42. Wang Z, Huang J, Liang H, Hartl C, Zhang Y, Tardif J, Rossi S, Zhang Q (in review) A novel approach of combining a Gaussian mixture model with an EM algorithm to detect forest disturbances. Ecological Applications.


41. Harr L, Esper J, Kirchhefer AJ, Hartl C (2021) Growth response of Betula pubescens Ehrh. to varying disturbance factors in northern Norway. Trees – Structure and Function 35, 421–431, doi: 10.1007/s00468-020-02043-1. (Harr_2020_Trees.pdf)

40. Hartl C, Düthorn E, Tejedor E, Kirchhefer A, Timonen M, Holzkämper S, Büntgen U, Esper J (2021) Micro-site conditions affect Fennoscandian forest growth. Dendrochronologia 65, 125787, doi: 10.1016/j.dendro.2020.125787. (Hartl_2021_Dendro Hartl_2021_Dendro_SOM)

39. Ljungqvist F, Thejll P, Christiansen B, Seim A, Hartl C, Esper J (2021) The significance of climate variability on early modern European grain prices. Cliometrica. (Ljungqvist_2021_Cliometrica.pdf)


38. Anhäuser T, Sehls B, Thomas W, Hartl C, Greule M, Scholz D, Esper J, Keppler F (2020) Tree-ring δ2H from lignin methoxyl groups indicate sensitivity to European-scale temperature changes. Palaeogeography, Palaeoclimatology, Palaeoecology 546, 109665, doi: 10.1016/j.palaeo.2020.109665. (Anhäuser_2020_PPP.pdf)

37. Esper J, Hartl C, Tejedor E, de Luis M, Günther B, Büntgen U (2020) High-resolution temperature variability reconstructed from black pine tree ring densities in southern Spain. Atmosphere 11, doi: 10.3390/atmos11070748. (Esper_2020_Atmos.pdf) (Esper_2020_Atmos_Supp.pdf)

36. Nagavciuc V, Kern Z, Ionita M, Hartl C, Konter O, Esper J, Popa I (2020) Climate signals in carbon and oxygen isotope ratios of Pinus cembra tree-ring cellulose from Calimani Mountains, Romania. International Journal of Climatology, 40, 2539–2556, doi: 10.1002/joc.6349. (Nagavciuc_2019_IJC.pdf)

35. Riechelmann DFC, Hartl C, Esper J (2020) The effect of provenance of historical timber on tree-ring based temperature reconstructions in the Western Central Alps. iForest–Biogeosciences and Forestry 13, 351-359, doi: 10.3832/ifor3412-013. (Riechelmann_2020_iForest.pdf)

34. Tejedor E, Serrano-Notivoli R, de Luis M, Saz MA, Hartl C, StGeorge S, Büntgen U, Liebhold A, Vuille M, Esper J (2020) A global perspective on the climate-driven growth synchrony of neighbouring trees. Global Ecology and Biogeography 29, 1114–1125, doi: 10.1111/geb.13090. (Tejedor_2020_GEB.pdf)


33. Björklund J, et al. (2019) Scientific merits and analytical challenges of tree-ring densitometry. Reviews of Geophysics 57, 1224-1264, doi: 10.1029/2019RG000642. (Björklund_2019_RevGeophys.pdf)

32. Hartl C, St. George S, Konter O, Harr L, Scholz D, Kirchhefer A, Esper J (2019) Warfare dendrochronology and the German super battleship Tirpitz’s deployment in Norway. Anthropocene 27, 100212. doi: 10.1016/j.ancene.2019.100212. (Hartl_2019_Anthropocene.pdf) (Hartl_2019_Anthropocene_SOM.pdf)


31. Esper J, Holzkämper S, Büntgen U, Schöne B, Keppler F, Hartl C, St. George S, Riechelmann DFC, Treydte K (2018) Site-specific climatic signals in stable isotope records from Swedish pine forests. Trees 32, 855-869. (Esper_2018_Trees.pdf)

30. Hacket-Pain A, Ascoli D, Vacchiano G, Biondi F, Cavin L, Conedera M, Drobyshev I, Dorado Liñán I, Friend A, Grabner M, Hartl C, Kreyling J, Lebourgeois F, Levanič T, Menzel A, van der Maaten E, van der Maaten-Theunissen M, Muffler L, Motta R, Roibu C, Popa I, Scharnweber T, Weigel R, Wilmking M, Zang C  (2018) Climatically controlled reproduction drives inter-annual growth variability in a temperate tree species. Ecology Letters, doi: 10.1111/ele.13158.

29. Klippel L, Krusic PJ, Brandes R, Hartl C, Belmecheri S, Dienst M, Esper J (2018) A 1286-year hydro-climate reconstruction for the Balkan Peninsula. Boreas 47, 1218–1229, , doi: 10.1111/bor.12320. (Klippel_2018_Boreas)

28. Trnka M, Hayes M, Jurečka F, Bartošová L, Anderson M, Brázdil R, Bronw J, Camarero J, Cudlín P, Dobrovolný P, Eitzinger J, Feng S, Finnessey T, Gregoric G, Havlik P, Hain C, Holman I, Johnson D, Kersebaum K, Ljungqvist F, Luterbacher J, Micale F, Hartl C, Možný M, Nejedlik P, Olesen J, Ruiz-Ramos M, Rötter R, Senay G, Vicente-Serrano S, Svoboda M, Susnika A, Tadesse T, Vizina A, Wardlow B, Büntgen U, Žalud Z (2018) Priority questions in multidisciplinary drought research. Climate Research 75, 241–260, doi: 10.3354/cr01509.


27. Esper J, Büntgen U, Hartl-Meier C, Oppenheimer C, Schneider L (2017) Northern Hemisphere temperature anomalies during the 1450s period of ambiguous volcanic forcing. Bulletin of Volcanology 79, 41, doi: 10.1007/s00445-017-1125-9. (Esper_2017_BullVolc.pdf)

26. Hartl-Meier C, Büntgen U, Smerdon J, Zorita E, Krusic P, Ljungqvist F, Schneider L, Esper J (2017) Temperature covariance in tree-ring reconstructions and climate model simulations over the past millennium. Geophysical Research Letters, doi: 10.1002/2017GL073239. (Hartl-Meier_2017_GRL.pdf) (Hartl-Meier_2017_GRL_SOM.pdf)

25. Hartl-Meier C, Esper J, Liebhold A, Konter O, Rothe A, Büntgen U (2017) Effects of host abundance on larch budmoth outbreaks in the European Alps. Agricultural and Forest Entomology, doi: 10.1111/afe.12216. (Hartl-Meier_2017_AFE.pdf) (Hartl-Meier_2017_AFE_Sup.pdf)

24. Hartl-Meier C, Schneider L, Esper J (2017) Site-specific temperature response to seven major volcanic eruptions over the last Millennium. TRACE 15, 46-53. (Hartl-Meier_2017_TRACE.pdf)

23. Klippel L, Hartl-Meier C, Lindén J, Kochbeck M, Emde K, Esper J (2017) Hourly resolved climate response of Picea abies beyond its natural distribution range. Baltic Forestry 23, 556-563. (Baltic Forestry.pdf)

22. Klippel L, Krusic PJ, Brandes R, Hartl-Meier C, Trouet V, Meko M, Esper J (2017) High-elevation inter-site differences in Mount Smolikas tree-ring width data. Dendrochronologia 44, 164-173, doi: 10.1016/j.dendro.2017.05.006. (Klippel_2017_Den.pdf)

21. Klippel L, Krusic PJ, Hartl-Meier C, Trouet V, Esper J (2017) High-elevation inter-site differences in Mount Smolikas tree-ring width data. TRACE 15, 81-87. (Klippel_2017_Trace.pdf)

20. Schneider L, Smerdon JE, Hartl-Meier C, Esper J (2017) Corrigendum: A new Archive of large volcanic events over the past Millennium derived from reconstructed summer temperatures (2017 Environ. Res. Lett. 12 094005). Environmental Research Letters 12, doi: 10.1088/1748-9326/aa9426. (Schneider_2017_ERLcorr.pdf)

19. Schneider L, Smerdon JE, Pretis F, Hartl-Meier C, Esper J (2017) A new Archive of large volcanic events over the past Millennium derived from reconstructed summer temperatures. Environmental Research Letters 12, 094005, doi: 10.1088/1748-9326/aa7a1b. (Schneider_2017_ERL.pdf)


18. Düthorn E, Hartl-Meier C, Kirchhefer A, Hader A, Rook T, Rösch D, Schwebler S, Esper J (2016) Identification of macro-scale groups among 17 site chronologies from Fennoscandia. TRACE 14, 32-37. (Duethorn_2016_Trace.pdf)

17. Esper J, Krusic PJ, Ljungqvist FC, Luterbacher J, Carrer M, Cook E, Davi NK, Hartl-Meier C, Kirdyanov A, Konter O, Myglan V, Timonen M, Treydte K, Trouet V, Villalba R, Yang B, Büntgen U (2016) Ranking of tree-ring based temperature reconstructions of the past millennium. Quaternary Science Reviews 145, 134-151. (Esper_2016_QSR.pdf)

16. Hartl-Meier C, Büntgen U, Esper J (2016) On the occurrence of cyclic larch budmoth mass outbreaks beyond its hotspot area. TRACE 14, 86-92. (Hartl-Meier_2016_Trace.pdf)

15. Hartl-Meier C, Rothe A (2016) Zuwachsreaktion der Bergwälder auf den Klimawandel. AFZ-Der Wald 22/2016, 46-48.


14. Hartl-Meier C (2015) Dendroökologische Untersuchungen zum Einfluss der Klimaänderungen auf Bergwälder der Nördlichen Kalkalpen. Dissertation, Technische Universität München, 173pp. (

13. Hartl-Meier C, Büntgen U, Esper J (2015) How is drought affecting forest growth and how can stable isotopes contribute to answer this question? In: Trnka M, Hayes MA (eds) Evaluation of drought and drought impacts through interdisciplinary methods. Global Change Research Centre AS CR v.v.i., p 21-25, ISBN: 978-80-87902-12-7. (Hartl-Meier_2015_GCRC)

12. Hartl-Meier C, Zang C, Büntgen U, Esper J, Rothe A, Göttlein A, Dirnböck T, Treydte K (2015) Uniform climate sensitivity in tree-ring stable isotopes across species and sites in a mid-latitude temperate forest. Tree Physiology 35, 4-15. (Hartl-Meier_2015_TreePhys.pdf) (Hartl-Meier_2015_TreePhys_sup.pdf)


11. Hartl-Meier C, Dittmar C, Zang C, Rothe A (2014) Mountain forest growth response to climate change in the Northern Limestone Alps. Trees - Structure and Function 28, 819-829. (Hartl-Meier_2014_Trees.pdf) (Hartl-Meier_2014_Trees_sup.pdf)

10. Hartl-Meier C, Rothe A (2014) Zuwachsreaktionen des Bergwaldes auf Klimaänderungen LWF aktuell 99, 42-44. (Hartl-Meier_2014_LWF.pdf)

9. Hartl-Meier C, Zang C, Dittmar C, Esper J, Göttlein A, Rothe A (2014) Vulnerability of Norway spruce to climate change in mountain forests of the European Alps. Climate Research 60, 119-132. (Hartl-Meier_2014_CR.pdf) (Hartl-Meier_2014_CR_sup.pdf)

8. Krüger I, Muhr J, Hartl-Meier C, Schulz C, Borken W (2014) Age determination of coarse woody debris with radiocarbon analysis and dendrochronological cross-dating. European Journal of Forest Research 133, 931-939. (Krüger_2014_EuJForRe.pdf)

7. Rothe A, Hartl-Meier C (2014) Jahrringuntersuchungen an Bergahorn in Wäldern der Nördlichen Kalkalpen. LWF aktuell 100, 55-57. (Rothe_2014_LWF.pdf)

6. Zang C, Hartl-Meier C, Dittmar C, Rothe A, Menzel A (2014) Patterns of drought tolerance in major European temperate forest trees: climatic drivers and variability. Global Change Biology 20, 3767-3779. (Zang_2014_GCB.pdf) (Zang_2014_GCB_sup.pdf)


5. Hartl-Meier C, Rothe A, (2013) Standortsicherung im Kalkalpin - SICALP: Zuwachsreaktionen kalkalpiner Bergwälder auf Klimaänderungen. Abschlussbericht zum EU-Projekt INTERREG Bayern-Österreich Nr. J00183, 48pp.

4. Hartl-Meier C, Rothe A (2013) Dendrochronologische Untersuchungen zur Reaktion der Baumart Bergahorn auf klimatische Veränderungen in den Nördlichen Kalkalpen. Abschlussbericht zum Forschungsprojekt ST 296, 35pp.


3. Hartl-Meier C, Rothe A (2012) SICALP - Standortsicherung im Kalkalpin. HSWT.NEWSGREEN 3/2012, 15.

< 2011

2. Dittmar C, Zang C, Hartl C, Rothe A (2011) Wachstum und Stabiliät von Bergwaldökosystemen im Nationalpark Berchtesgaden. Abschlussbericht zum Forschungsprojekt, 93pp.

1. Hartl C (2009) Untersuchungen zum Zusammenhang zwischen Humifizierungsgrad und Pflanzenzusammensetzung von Torfen am Beispiel des Kalkniedermoores am Islinger Mühlbach (Regensburg-Burgweinting). Diplomarbeit, Universität Regensburg, 117pp.



Winter 2018/19

  • M1/M1-ED Climate Geography A
  • M1/M1-ED Climate Geography B
  • M11-MSc Project Workshop: Environment Archives & Archaeology

Summer 2018:

  • M3ED Seminar and excursion related to regional geography: Eastern Bavaria
  • M11-MSc Project Workshop: Environment Archives & Archaeology

Summer 2017:

  • M11/M9-ED Regional Seminar and excursion "North Scandinavia" A
  • M11/M9-ED Regional Seminar and excursion "North Scandinavia" B

Winter 2016/17:

  • M1/M1-ED Physical Geography I (Climate Geography) E,F

Summer 2016:

  • M11/M9-ED Regional Seminar II incl. a 14 days excursion North Scandinavia

Winter 2015/16:

  • M1/M1-ED Physical Geography I (Climate Geography) B / I C

Summer 2015:

  • M11/M9-ED Regional Seminar II incl. a 14 days excursion North Scandinavia

Winter 2014/15:

  • M/M1-ED Physical Geography I (Climate Geography) incl. 2 field days

Summer 2014:

  • M6-MSc Dendroclimatology

Winter 2013/14:

  • Physical Geography I (Climate Geography)