Personal profile:

Profile photo of  Dr. Gerhard Helle

Dr. Gerhard Helle

Section 5.2: Climate Dynamics and Landscape Evolution

Helmholtz Centre Potsdam
GFZ German Research Centre for Geosciences

Telegrafenberg
Building D, room 220
14473 Potsdam
Phone: +49 331 288-1377
Fax: +49 331 288-1302
e-mail: gerhard.helle(at)gfz-potsdam.de

Publications

About the person

Function and Responsibilities:

Senior scientist, Dendrochronology Laboratory
  

Further informationen online:
Academia.edu  Google Scholar  Research Gate

Teaching:
Research Interests:  
  • Stable isotope techniques with focus on invention and optimization of methodologies for high-resolution and high-throughput isotope analysis of tree-rings
  • Climate signal and stable isotope transfer from atmosphere, soil and leaves into tree-rings
  • Natural climate variability of the late Glacial/early Holocene period as well as the Common Era, i.e. the last 2000 years
  • Stable isotope variability in tropical timber (Tropical dendroclimatology)
  • Dendrochronology of Central Asia
Patents:
  • "Verfahren zur thermischen Umsetzung von Probenmaterial in Messgas". DE102010001677.2; WO2011/095639A1
Projects:
GFZ German Research Centre for GeoSciences: 
  • since 2011 Global Change Observatory Central Asia (GCO-CA) – Palaeoclimate, Environment, and Climate Change; Partners: CAIAG ( Central Institute of Applied Geosciences, Bishkek, Kyrgizstan; KNAU ( Kyrgyz National Agrarian University, Bishkek, Kyrgyzstan, Dr. Almazbek Orozumbekov), UB-RAS (Russian Academy of Sciences, Ural Branch, Ekaterinburg, Prof. Dr. V. Mazepa)
Eva-Mayr-Stihl Foundation:
  • 2013 - 2014 "Assessment of contemporary vs. Lateglacial/EarlyHolocene climate variability based on isotopes from the NZ kauri tree­‐ring archive – IsoWoodNZ "; Partners: Alan Hogg, Radiocarbon Laboratory, Waikato University, Hamilton, NZ &  Jonathan Palmer, Climate Change Research Centre, University of New South Wales in Sydney, AU and Gondwana Tree-Ring Laboratory, Canterbury, NZ    
Federal Ministry for Education and research (BMBF):
  • 2011 - 2014 Verbundprojekt: CADY, Central Asian Climate DYnamics; Project 3: 20th century Westerlies - Monsoon variability in view of the past 1500 years - high resolution studies on multi-parameter records from tree rings.(FK 03G0813H)
  • 2012 - 2014 Quid agis woody C4? Past and Present Response of Woody C3 and C4 Plants to Climate Change - A pilot study on Sophora chrysophylla (C3) and Euphorbia olowaluana (C4) trees in Hawai`i, USA; International Bureau; Partner: Patrick Hart, UH Hilo, Hawaii, USA
  • 2012 - 2014 Assessment of Present-Day vs. Lateglacial/Early Holocene climate variability and atmospheric CO2 changes utilizing the tree-ring archive of Kauri; Internationales Büro; Partners: Alan Hogg, Radiocarbon Laboratory, Waikato University, Hamilton, NZ & Jonathan Palmer, University of New South Wales in Sydney, AU and Gondwana Tree-Ring Laboratory, Canterbury, NZ
  • 2009 - 2013 Verbundprojekt: Bioenergie2012: ISOWOOD-Breeding: Nutzbarmachung SNP-basierter Selektionsstrategien für die Züchtung ertragsoptimierter Pappelsorten in landwirtschaftlichen Kurzumtriebsplantagen; Teilprojekt 4: Dendroisotope & Wassernutzungseffizienz (FK0315427B) Partner: Prof. Dr. D. Krabel, Dr. Mathias Meyer, TU Dresden, AG Molekulare Gehölzphysiologie, Dr. D. Landgraf, P&P Forstdienstleistungen, Eitelborn.
  • 2001 - 2006 German climate research programme DEKLIM, Young researchers programme, Network project: TRICE - Tree-Rings, Isotopes, Climate and Environment
German Science Foundation (DFG):
  • 2013 - 2015 Twentieth Century changes of tree ring isotopes in Southeastern Brazilian forests: How do climate conditions influence growth and water use efficiency (WUE) and thus enforce tree migration. Joint DFG/FAPESP Research Grant Proposal (HE3089/5-1); Partners: Dieter Anhuf, Universität Passau & Dr. Gregório Ceccantini, University of São Paulo USP – Plant Anatomy, São Paulo, Brazil - (Principal investigator in Brazil)
  • 2010 - 2013 HIMPAC (HE3089/4-1), Himalaya: Modern and Past Climates  
  • 2007 - 2011 INDOPAL (HE3089/2-1), The role of the Indian Ocean in tropical climate variability – a paleo-perspective
  • 2005 - 2008 PIRIN (HE3089/1-1), Rekonstruktion der jüngeren Klima-und Landschaftsentwicklung in sensible südosteuropäischen Grenzräumen am Beispiel des Piringebirges, Bulgarien  
EU 6th Framework:
  • 2006 - 2011 MILLENNIUM (FP-017008-2), "European climate of the last millennium"
EU 5th Framework:
  • 2003 - 2007 ISONET (EVK2-CT-2002-00149), "400 years of Annual Reconstructions of European Climate Variability using a High Resolution Isotopic Network"; Co-ordinator WP 3 "Intra-annual isotope variability and process studies"

Career:

  • since 2009 Senior Scientist, Head of Dendrolaboratory, Section 5.2 Climate Dynamics and Landscape Evolution, German Centre for GeoSciences GFZ
  • 2005-2008 Group Leader “Tree-ring stable isotopes” at the Institute for Chemistry and Dynamics of the Geosphere, ICG-4 Sedimentary Systems, Helmholtz Centre Jülich
  • 2000-2005 Research Group Leader and Co-Ordinator of the young researchers network project  “ TRICE – Tree-Rings, Isotopes, Climate and Environment”, at the Institute for Chemistry and Dynamics of the Geosphere, ICG-4 Sedimentary Systems, Helmholtz Centre Jülich, funded by the German Federal Ministry for Education and Research (BMBF) within the German Climate Research Programme DEKLIM
  • 1998-2000 PostDoc at the Institute for Chemistry and Dynamics of the Geosphere, ICG-4 Sedimentary Systems (Prof. Dr. G.H. Schleser), Helmholtz Centre Jülich, Germany (special leave from MünsterUniversity)
  • 1997-1998 Assistant lecturer at the Chair of Palaeontology (Prof. F. Strauch), University of Münster, Germany    
  • 1997 Young scientist at the Chair of Palaeontology, Institute for Geology & Palaeontology, University of Tübingen, Germany

Education:

  • 1997 Dissertation (Dr. rer. nat.) in Geosciences, Department 14: GeoSciences, University of Münster, Germany Title: "Hochauflösende intra-annuelle Kohlenstoff-Isotopenuntersuchungen an Baumjahresringen"
  • 1994 Diploma in Geology & Palaeontology, Department 14: GeoSciences, University of Münster,  Germany

Research Boards and Committees:

since 2012 Member of the board of Association for Tree-ring Research (ATR) (treasurer)

2001 Founding Member of the Association for Tree-ring Research (ATR) 


Selected publications : (click " Publications " for full list)

Highlights (most cited):
Brienen, R. J. W.; Helle, G.; Pons, T. L.; Guyot, J.-L.; Gloor, M. (2012): Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability. PNAS, 109, 42, 16957-16962.
    
Treydte, K.S., Schleser, G.H., Helle, G., Winiger, M., Frank, D., Haug, G. & Esper, J. (2006) Twentieth century as the wettest period in northern Pakistan over the past millennium. Nature, 440: 1179‐1182
  
Helle, G. & Schleser, G.H. (2004). Beyond CO 2-fixation by Rubisco – an interpretation of 13C/ 12C variations in tree rings from novel intra‐seasonal studies on broad‐leaf trees. Plant, Cell & Environment, 27,367‐380
 
Schleser,G.H., Helle, G., Lücke, A. & H. Vos (1999) Isotope signals as climate proxies: the role of transfer functions in the study of terrestrial archives. Quaternary Science Reviews, 18/7: 927-943

Books/book chapters
Helle, G., Schleser,G.H. (2004). Interpreting climate proxies from tree-rings. In: Fischer, H., Floeser, G., Kumke,T., Lohmann, G., Miller, H., Negendank, J.F.W., von Storch, H. (Eds.): Towards a synthesis of Holocene proxy data and climate models. Springer Verlag Berlin

T. Kumke, A. Hense, C. Schölzel, A.A. Andreev, C. Brüchmann, C. Gebhardt, G. Helle, U. Kienel, N. Kühl, T. Litt, F. Neumann, G. Schleser (2004) Transfer functions for paleoclimate reconstructions-applications. In: Fischer, H., Floeser, G., Kumke,T., Lohmann, G., Miller, H., Negendank, J.F.W., von Storch, H. (Eds.): Towards a synthesis of Holocene proxy data and climate models. Springer Verlag Berlin   

Other publications:
Helle, G. & I. Heinrich (2012) Baumjahresringe als chemisch-physikalischer Datenträger für Umwelt- und Klimainformationen der Vergangenheit. System Erde, 2(1), 58-61. doi:10.2312/GFZ.syserde.02.01.11
 
Bens, O., Schwank, M., Blume, T., Brauer, A., Güntner, A., Heinrich, I., Helle, G., Itzerott, S., Kaiser, K., Sachs, T. & R.F. Hüttl (2012) TERENO – Eine Monitoring- und Forschungsplattform zur Erfassung langfristiger Auswirkungen des Globalen Wandels auf regionaler Ebene System Erde, 2(1), 68-73, doi:10.2312/GFZ.syserde.02.01.13
  
Voronin, V.I., Tartakovsky, V.A., Volkov, Yu.V., Schleser, G.H., Helle, G., Nesvetailo, V.D. (2008). Tree-ring isotope chronologies of the Baikal region and their connection with ice isotope chronologies of Greenland. Atmos. Oceanic Opt., 21, 1: 50- 53
  
Bertold, J., Helle, G., Kitagawa, C. Peters, J. & F. Strauch (2006) Nordsee oder Mittelmeer? Römische Austern und  andere Speiseabfälle einer gehobenen Küche aus den Thermengrabungen in der Colonia Ulpia Traiana. Xantener Berichte: Grabung - Forschung - Präsentation, Bd. 14, Landschaftsverband Rheinland, M. Müller (Hrsg.); Verlag Philipp von Zabern, Mainz
   
Helle, G., Treydte, K.S. & Verheyden, A. (2004) Tropical Swietenia macrophylla wood reveals a systematic recurring carbon isotope pattern. TRACE Tree Rings in Archaeology, Climatology and Ecology, Vol. 2
Proceedings of the DENDROSYMPOSIUM 2003, May 1st – 3rd 2003, Utrecht, The Netherlands, ISBN 3-89336-349-1: 107-109

Poszwa, A., Wickman, T., Dambrine, E., Ferry, B., Dupouey, J.L., Helle, G., Schleser, G.H., Breda, N. (2003)
A retrospective isotopic study of spruce decline in the Vosges Mountains (France). Water, Air, and Soil Pollution, 3: 201-222

Helle, G., Schleser, G.H., Bräuning, A. (2002) Climate history of the Tibetan Plateau for the last 1500 years as inferred from stable carbon isotopes in tree-rings. IAEA, Study of Environmental Change using isotope techniques. Proceedings of an Int. Conf., Vienna, 23-27 April 2001: 301-311

Attendorn, H.G., Helle, G., Strauch, F. & G.E Thüry (2003) Provenienzuntersuchungen an römischen Fundaustern aus der Zone nordwärts der Alpen. Röm. Österreich 23/24: 7-42
  
Helle, G., Schleser, G. H. (1998): Die Eichenbohlen des neolithischen Brunnens von Erkelenz-Kückhoven als Klimaarchive. - In: Koschik, H. (Ed.), Brunnen der Jungsteinzeit: internationales Symposium in Erkelenz, 27. bis 29. Oktober 1997, (Materialien zur Bodendenkmalpflege im Rheinland ; 11), Köln, 271-277.