H
Håkan Grudd
Researcher at Stockholm University
Publications - 42
Citations - 3135
Håkan Grudd is an academic researcher from Stockholm University. The author has contributed to research in topics: Dendroclimatology & Climate change. The author has an hindex of 28, co-authored 42 publications receiving 2799 citations. Previous affiliations of Håkan Grudd include Royal Swedish Academy of Sciences & Swedish Polar Research Secretariat.
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A 7400-year tree-ring chronology in northern Swedish Lapland: natural climatic variability expressed on annual to millennial timescales
TL;DR: In this article, tree-ring widths from 880 living, dry dead, and subfossil northern Swedish pines (Pinus syl vestris L) have been assembled into a continuous and precisely dated chronology (the Tornetrask chronology) covering the period 5407 BC to 1997.
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Trees tell of past climates: But are they speaking less clearly today?
Keith R. Briffa,F.H. Schweingruber,Philip Jones,Timothy J. Osborn,Ian Harris,S. G. Shiyatov,Eugene A. Vaganov,Håkan Grudd +7 more
TL;DR: The annual growth of trees, as represented by a variety of ringwidth, densitometric, or chemical parameters, represents a combined record of different environmental forcings, one of which is climat...
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Torneträsk tree-ring width and density ad 500–2004: a test of climatic sensitivity and a new 1500-year reconstruction of north Fennoscandian summers
TL;DR: The authors presented updated tree-ring width (TRW) and maximum density (MXD) from Tornetrask in northern Sweden, now covering the period ad 500-2004, by including data from relatively young trees for the most recent period, eliminating a previously noted decline in recent MXD.
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Spatial variability and temporal trends in water-use efficiency of European forests
Matthias Saurer,Renato Spahni,Renato Spahni,David Frank,Fortunat Joos,Fortunat Joos,Markus Leuenberger,Neil J. Loader,Danny McCarroll,Mary Gagen,Ben Poulter,Rolf T. W. Siegwolf,Laia Andreu-Hayles,Tatjana Boettger,Isabel Dorado Liñán,Isabel Dorado Liñán,Ian J. Fairchild,Michael Friedrich,Emilia Gutiérrez,Marika Haupt,Emmi Hilasvuori,Emmi Hilasvuori,Ingo Heinrich,Gerd Helle,Håkan Grudd,Risto Jalkanen,Tom Levanič,Hans W. Linderholm,Iain Robertson,Eloni Sonninen,Kerstin Treydte,John S. Waterhouse,Ewan J. Woodley,Ewan J. Woodley,Peter M. Wynn,Giles H.F. Young +35 more
TL;DR: It is demonstrated that the combined effects of increasing CO2 and climate change leading to soil drying have resulted in an accelerated increase in iWUE, which will help to reduce uncertainties in the land surface schemes of global climate models, where vegetation-climate feedbacks are currently still poorly constrained by observational data.
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Long-term summer temperature variations in the Pyrenees
TL;DR: In this article, a tree-ring width and density series from living and dry-dead conifers from two timberline sites in the Spanish Pyrenees were compiled, and the new density record correlates at 0.53 (0.68 in the higher frequency domain) with May-September maximum temperatures over the 1944-2005 period.