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List of works by Gerhard Helle

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The twentieth century was the wettest period in northern Pakistan over the past millennium

scientific article published in Nature
Tracing carbon and oxygen isotope signals from newly assimilated sugars in the leaves to the tree-ring archive

scientific article
A Network of Terrestrial Environmental Observatories in Germany

article
Wood Cellulose Preparation Methods and Mass Spectrometric Analyses of δ13C, δ18O, and Nonexchangeable δ2H Values in Cellulose, Sugar, and Starch: An Interlaboratory Comparison

article
Long tree-ring chronologies reveal 20th century increases in water-use efficiency but no enhancement of tree growth at five Iberian pine forests

article by Laia Andreu-Hayles et al published 8 February 2011 in Global Change Biology
Spatial variability and temporal trends in water-use efficiency of European forests.

scientific article
Impact of climate and CO2 on a millennium-long tree-ring carbon isotope record

scholarly article
Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Nino-Southern Oscillation variability

scientific article (publication date: 16 October 2012)
Climate signals in tree-ring width, density and δ13C from larches in Eastern Siberia (Russia)

scholarly article
Placing unprecedented recent fir growth in a European-wide and Holocene-long context

scientific article published in 2014
Tree height strongly affects estimates of water-use efficiency responses to climate and CO2 using isotopes.

scientific article
Isotope signals as climate proxies: the role of transfer functions in the study of terrestrial archives

scholarly article
UV-laser-based microscopic dissection of tree rings - a novel sampling tool for δ(13) C and δ(18) O studies

scientific article
Climate signals derived from cell anatomy of Scots pine in NE Germany

scientific article published on 01 August 2013
Punctuated Shutdown of Atlantic Meridional Overturning Circulation during Greenland Stadial 1

scientific article
New tree-ring evidence for the Late Glacial period from the northern pre-Alps in eastern Switzerland

scholarly article
Meteorological Drivers of Extremes in Daily Stem Radius Variations of Beech, Oak, and Pine in Northeastern Germany: An Event Coincidence Analysis.

scientific article published on 03 June 2016
Tuning the Voices of a Choir: Detecting Ecological Gradients in Time-Series Populations

scientific article
Response of climate-growth relationships and water use efficiency to thinning in a Pinus nigra afforestation

scientific article published in 2010
Climate Change Increases Drought Stress of Juniper Trees in the Mountains of Central Asia.

scientific article
Decadally Resolved Lateglacial Radiocarbon Evidence from New Zealand Kauri

article
Oxygen isotopes in tree rings show good coherence between species and sites in Bolivia

article
Pooled versus separate measurements of tree-ring stable isotopes

scientific article published on 12 March 2011
Multiple tree-ring chronologies (ring width, δ13C and δ18O) reveal dry and rainy season signals of rainfall in Indonesia

scholarly article
A guideline for sample preparation in modern tree-ring stable isotope research

Hydroclimatic seasonality recorded by tree ring δ18O signature across a Himalayan altitudinal transect

Characteristics of radial growth and stable isotopes in a single oak tree to be used in climate studies

scientific article published on 22 January 2008
Climatic signal from Pinus leucodermis axial resin ducts: a tree-ring time series approach

Increased water-use efficiency translates into contrasting growth patterns of Scots pine and sessile oak at their southern distribution limits.

scientific article published on 14 October 2017
An 810-year history of cold season temperature variability for northern Poland

article
High-resolution <sup>14</sup>C bomb peak dating and climate response analyses of subseasonal stable isotope signals in wood of the African baobab – a case study from Oman

scientific article published in 2021
Lakes and trees as climate and environment archives: the TERENO Northeastern German Lowland Observatory

scientific article published in 2022
Inter-annual variation of tree-ring width, δ13C and δ18O in juvenile trees of five plantation poplar cultivars (Populus spp.)

scientific article published in 2018
Tropical tree growth driven by dry-season climate variability

Global Peak in Atmospheric Radiocarbon Provides a Potential Definition for the Onset of the Anthropocene Epoch in 1965.

scientific article published on 19 February 2018
A past and present perspective on the European summer vapour pressure deficit

scientific article published on 8 June 2023
A high yield cellulose extraction system for small whole wood samples and dual measurement of carbon and oxygen stable isotopes

scholarly article
Changes in El Niño – Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings

article
Supplementary material to "A past and present perspective on the European summer vapour pressure deficit"

scientific article published on 8 June 2023
Pantropical tree rings show small effects of drought on stem growth

scientific article published on 31 July 2025
A past and present perspective on the European summer vapor pressure deficit

Large-scale climate signals of a European oxygen isotope network from tree rings

scientific article published in 2021
Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas

scientific article published in Scientific Reports
Climate sensitivity and parameter coherency in annually resolved δ13C and δ18O from Pinus uncinata tree-ring data in the Spanish Pyrenees

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