L
Lena Hellmann
Researcher at Oeschger Centre for Climate Change Research
Publications - 17
Citations - 496
Lena Hellmann is an academic researcher from Oeschger Centre for Climate Change Research. The author has contributed to research in topics: Arctic & Driftwood. The author has an hindex of 11, co-authored 17 publications receiving 392 citations. Previous affiliations of Lena Hellmann include National Scientific and Technical Research Council.
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Journal ArticleDOI
Temperature‐induced recruitment pulses of Arctic dwarf shrub communities
Ulf Büntgen,Lena Hellmann,Willy Tegel,Signe Normand,Isla H. Myers-Smith,Alexander V. Kirdyanov,Daniel Nievergelt,Fritz H. Schweingruber +7 more
TL;DR: In this paper, the growth behavior and age structure of 871 dwarf shrubs from 10 species at 30 sites in coastal East Greenland at ˜70°N' were investigated, and a literature review was conducted to place the findings in a pan-Arctic context.
Journal ArticleDOI
Diverse growth trends and climate responses across Eurasia’s boreal forest
Lena Hellmann,L. I. Agafonov,Fredrik Charpentier Ljungqvist,Olga V. Churakova (Sidorova),Elisabeth Düthorn,Jan Esper,Lisa Hülsmann,Alexander V. Kirdyanov,Alexander V. Kirdyanov,Pavel Moiseev,Vladimir S. Myglan,Anatoly N. Nikolaev,Frederick Reinig,Fritz H. Schweingruber,Olga Solomina,Willy Tegel,Ulf Büntgen +16 more
TL;DR: The area covered by boreal forests accounts for approximately 16% of the global and 22% of Northern Hemisphere landmass as mentioned in this paper, and changes in the productivity and functioning of this circumpolar biome not only affect the global but also the Northern Hemisphere.
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Tracing the origin of Arctic driftwood
Lena Hellmann,Willy Tegel,Ólafur Eggertsson,Fritz H. Schweingruber,Robert A. Blanchette,Alexander V. Kirdyanov,Holger Gärtner,Ulf Büntgen +7 more
TL;DR: In this article, driftwood remains from coastal East Greenland and Svalbard were used for wood anatomical classification, a multi-species subset was used for detecting fungi; and information on boreal vegetation patterns, circumpolar river systems, and ocean current dynamics was reviewed and evaluated.
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Tree-Ring Amplification of the Early Nineteenth-Century Summer Cooling in Central Europe
Ulf Büntgen,Miroslav Trnka,Paul J. Krusic,Tomáš Kyncl,Josef Kyncl,Jürg Luterbacher,Eduardo Zorita,Fredrik Charpentier Ljungqvist,Ingeborg Auer,Oliver Konter,Lea Schneider,Willy Tegel,Petr Štěpánek,Stefan Brönnimann,Lena Hellmann,Daniel Nievergelt,Jan Esper +16 more
TL;DR: In this paper, the suitability of tree-ring chronologies for reconstructing climate variability over centuries to millennia is discussed, and the most important proxy archives to reconstruct climate variability are presented.
Journal ArticleDOI
Arctic driftwood reveals unexpectedly rich fungal diversity
TL;DR: This data sequences 177 fungal cultures in driftwood from Iceland, Greenland and the Siberian Lena Delta to provide unique insight into the diversity of colonizing and decaying fungi at the interface of extremely cold terrestrial and marine environments.