H
Hannu Ilvesniemi
Researcher at Finnish Forest Research Institute
Publications - 122
Citations - 9263
Hannu Ilvesniemi is an academic researcher from Finnish Forest Research Institute. The author has contributed to research in topics: Soil water & Scots pine. The author has an hindex of 40, co-authored 117 publications receiving 8338 citations. Previous affiliations of Hannu Ilvesniemi include University of Helsinki & University of Kiel.
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Journal ArticleDOI
On the Separation of Net Ecosystem Exchange into Assimilation and Ecosystem Respiration: Review and Improved Algorithm
Markus Reichstein,Eva Falge,Dennis D. Baldocchi,Dario Papale,Marc Aubinet,Paul Berbigier,Christian Bernhofer,Nina Buchmann,Nina Buchmann,Tagir G. Gilmanov,A. Granier,Thomas Grünwald,Katka Havránková,Hannu Ilvesniemi,Dalibor Janouš,Alexander Knohl,Alexander Knohl,Tuomas Laurila,Annalea Lohila,Denis Loustau,Giorgio Matteucci,Tilden P. Meyers,Franco Miglietta,Jean-Marc Ourcival,Jukka Pumpanen,Serge Rambal,Eyal Rotenberg,María José Sanz,John Tenhunen,G. Seufert,Francesco Primo Vaccari,Timo Vesala,Dan Yakir,Riccardo Valentini +33 more
TL;DR: In this paper, the authors analyse the effect of extrapolation of night-time values of ecosystem respiration into the daytime; this is usually done with a temperature response function that is derived from long-term data sets.
Journal ArticleDOI
Evidence for Soil Water Control on Carbon and Water Dynamics in European Forests during the Extremely Dry Year: 2003
André Granier,Markus Reichstein,Nathalie Bréda,Ivan A. Janssens,Eva Falge,Philippe Ciais,Thomas Grünwald,M. Aubinet,Paul Berbigier,Christian Bernhofer,Nina Buchmann,Osvaldo Facini,Giacomo Grassi,B. Heinesch,Hannu Ilvesniemi,Petri Keronen,Alexander Knohl,Barbara Köstner,Fredrik Lagergren,Anders Lindroth,Bernard Longdoz,Denis Loustau,J. Mateus,Leonardo Montagnani,C. Nys,Eddy Moors,Dario Papale,Marianne Peiffer,Kim Pilegaard,Gabriel Pita,Jukka Pumpanen,Serge Rambal,Corinna Rebmann,Abel Rodrigues,Guenther Seufert,John Tenhunen,Timo Vesala,Qiuwang Wang +37 more
TL;DR: In this paper, the authors used continuous carbon and water flux measurements at 12 European monitoring sites covering various forest ecosystem types and a large climatic range in order to characterise the consequences of this drought on ecosystems functioning.
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Comparison of different chamber techniques for measuring soil CO2 efflux
Jukka Pumpanen,Pasi Kolari,Hannu Ilvesniemi,Kari Minkkinen,Timo Vesala,Sini Niinistö,Annalea Lohila,Tuula Larmola,Micaela Morero,Mari Pihlatie,Ivan A. Janssens,Jorge Curiel Yuste,José M. Grünzweig,Sascha Reth,Jens-Arne Subke,Kathleen Savage,Werner L. Kutsch,Geir Østreng,Waldemar Ziegler,P. M. Anthoni,Anders Lindroth,Pertti Hari +21 more
TL;DR: In this article, the effect of soil moisture on chamber measurements was tested by wetting the fine quartz sand to about 25% volumetric water content, and the results showed that the chamber headspace concentration also affects the flux by altering the concentration gradient between the soil and the chamber.
Journal ArticleDOI
Air temperature triggers the recovery of evergreen boreal forest photosynthesis in spring
Suni Tanja,Frank Berninger,Timo Vesala,Tiina Markkanen,Pertti Hari,Annikki Mäkelä,Hannu Ilvesniemi,Heikki Hänninen,Eero Nikinmaa,Timo Huttula,Tuomas Laurila,Mika Aurela,Achim Grelle,Anders Lindroth,Almut Arneth,Olga Shibistova,Jon Lloyd +16 more
TL;DR: In this paper, the authors investigated the environmental cues initiating the spring recovery of boreal coniferous forest ecosystems under field conditions, and found that air temperature emerged as the best predictor for P-* in spring.
Journal Article
Co2 emissions from soil in response to climatic warming are overestimated:the decomposition of old soil organic matter is tolerant of temperature
TL;DR: Measurements of the amount and age of soil C and the decomposition of litter on temperature gradients and a simple model describing soil C dynamics are used to show that the decompositions of old soil organic matter is resistant to changes in temperature.