|The twentieth century was the wettest period in northern Pakistan over the past millennium|
KS Treydte, GH Schleser, G Helle, DC Frank, M Winiger, GH Haug, ...
Nature 440 (7088), 1179-1182, 2006
|A network of terrestrial environmental observatories in Germany|
S Zacharias, H Bogena, L Samaniego, M Mauder, R Fuß, T Pütz, ...
Vadose zone journal 10 (3), 955-973, 2011
|Beyond CO2‐fixation by Rubisco – an interpretation of 13C/12C variations in tree rings from novel intra‐seasonal studies on broad‐leaf trees|
G Helle, GH Schleser
Plant, Cell & Environment 27 (3), 367-380, 2004
|Water-use efficiency and transpiration across European forests during the Anthropocene|
DC Frank, B Poulter, M Saurer, J Esper, C Huntingford, G Helle, K Treydte, ...
Nature Climate Change 5 (6), 579-583, 2015
|Isotope signals as climate proxies: the role of transfer functions in the study of terrestrial archives|
GH Schleser, G Helle, A Lücke, H Vos
Quaternary Science Reviews 18 (7), 927-943, 1999
|Tracing carbon and oxygen isotope signals from newly assimilated sugars in the leaves to the tree‐ring archive|
A Gessler, E Brandes, N Buchmann, G Helle, H Rennenberg, RL Barnard
Plant, cell & environment 32 (7), 780-795, 2009
|Long tree‐ring chronologies reveal 20th century increases in water‐use efficiency but no enhancement of tree growth at five Iberian pine forests|
L ANDREU‐HAYLES, O Planells, E Gutierrez, E Muntan, G Helle, ...
Global Change Biology 17 (6), 2095-2112, 2011
|Signal strength and climate calibration of a European tree‐ring isotope network|
K Treydte, D Frank, J Esper, L Andreu, Z Bednarz, F Berninger, T Boettger, ...
Geophysical Research Letters 34 (24), 2007
|A novel approach for the homogenization of cellulose to use micro‐amounts for stable isotope analyses|
W Laumer, L Andreu, G Helle, GH Schleser, T Wieloch, H Wissel
Rapid Communications in Mass Spectrometry: An International Journal Devoted …, 2009
|Annual cyclicity in high‐resolution stable carbon and oxygen isotope ratios in the wood of the mangrove tree Rhizophora mucronata|
A Verheyden, G Helle, GH Schleser, F Dehairs, H Beeckman, N Koedam
Plant, Cell & Environment 27 (12), 1525-1536, 2004
|Response of climate-growth relationships and water use efficiency to thinning in a Pinus nigra afforestation|
D Martín-Benito, M Del Río, I Heinrich, G Helle, I Cañellas
Forest Ecology and Management 259 (5), 967-975, 2010
|Impact of climate and CO2 on a millennium-long tree-ring carbon isotope record|
KS Treydte, DC Frank, M Saurer, G Helle, GH Schleser, J Esper
Geochimica et Cosmochimica Acta 73 (16), 4635-4647, 2009
|Climate signals in tree-ring width, density and δ13C from larches in Eastern Siberia (Russia)|
AV Kirdyanov, KS Treydte, A Nikolaev, G Helle, GH Schleser
Chemical geology 252 (1-2), 31-41, 2008
|A novel device for batch-wise isolation of α-cellulose from small-amount wholewood samples|
T Wieloch, G Helle, I Heinrich, M Voigt, P Schyma
Dendrochronologia 29 (2), 115-117, 2011
|Environmental history of the German Lower Rhine Embayment during the Middle Miocene as reflected by carbon isotopes in brown coal|
A Lücke, G Helle, GH Schleser, I Figueiral, V Mosbrugger, TP Jones, ...
Palaeogeography, Palaeoclimatology, Palaeoecology 154 (4), 339-352, 1999
|Placing unprecedented recent fir growth in a European‐wide and Holocene‐long context|
U Büntgen, W Tegel, JO Kaplan, M Schaub, F Hagedorn, M Bürgi, ...
Frontiers in Ecology and the Environment 12 (2), 100-106, 2014
|Multiple tree-ring chronologies (ring width, δ13C and δ18O) reveal dry and rainy season signals of rainfall in Indonesia|
K Schollaen, I Heinrich, B Neuwirth, PJ Krusic, RD D'Arrigo, O Karyanto, ...
Quaternary Science Reviews 73, 170-181, 2013
|Climate signals derived from cell anatomy of Scots pine in NE Germany|
W Liang, I Heinrich, S Simard, G Helle, ID Liñán, T Heinken
Tree physiology 33 (8), 833-844, 2013
|Tree height strongly affects estimates of water-use efficiency responses to climate and CO 2 using isotopes|
RJW Brienen, E Gloor, S Clerici, R Newton, L Arppe, A Boom, S Bottrell, ...
Nature Communications 8 (1), 1-10, 2017
|Stable-carbon isotope time series from tropical tree rings indicate a precipitation signal|
E Fichtler, G Helle, M Worbes
Tree-Ring Research 66 (1), 35-49, 2010