Blar i NIBIO Brage på forfatter "Lange, Holger"
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Climate change drives substantial decline of understorey species richness and abundance in Norway spruce forests during 32 years of vegetation monitoring
Økland, Tonje; Halvorsen, Rune; Lange, Holger; Nordbakken, Jørn-Frode; Clarke, Nicholas (Peer reviewed; Journal article, 2023-05-31)Questions Observations in permanent forest vegetation plots in Norway and elsewhere indicate that complex changes have taken place over the period 1988–2020. These observations are summarised in the “climate-induced ... -
Comparing sap flow calculations from Heat Field Deformation (HFD) and Linear Heat Balance (LHB) methods
Zhao, Junbin; Lange, Holger; Meissner, Helge Rainer; Bright, Ryan M. (Peer reviewed; Journal article, 2022-06-15)Heat Field Deformation (HFD) is a widely used method to measure sap flow of trees based on empirical relationships between heat transfer within tree stems and the sap flow rates. As an alternative, the Linear Heat Balance ... -
Das Anthropozän - Realität oder akademische Konstruktion?
Hauhs, Michael; Lange, Holger (Journal article, 2018)Der Begriff des Anthropozäns fordert auf zu einer neuen Zusammenarbeit zwischen Natur-, Technik-, Sozial- und Kulturwissenschaften. -
Diagnosing the dynamics of observed and simulated ecosystem Gross Primary Productivity with time causal Information Theory quantifiers
Sippel, Sebastian; Lange, Holger; Mahecha, Miguel D.; Hauhs, Michael; Bodesheim, Paul; Kaminski, Thomas W.; Gans, Fabian; Rosso, Osvaldo A. (Journal article; Peer reviewed, 2016)Data analysis and model-data comparisons in the environmental sciences require diagnostic measures that quantify time series dynamics and structure, and are robust to noise in observational data. This paper investigates ... -
Drought, Heat, and the Carbon Cycle: a Review
Sippel, Sebastian; Reichstein, Markus; Ma, Xuanlong; Mahecha, Miguel D.; Lange, Holger; Flach, Milan; Frank, Dorothea (Journal article; Peer reviewed, 2018-06-14)Purpose of the Review Weather and climate extremes substantially affect global- and regional-scale carbon (C) cycling, and thus spatially or temporally extended climatic extreme events jeopardize terrestrial ecosystem ... -
Estimating Carbon Sink Strength of Norway Spruce Forests Using Machine Learning
Zhao, Junbin; Lange, Holger; Meissner, Helge Rainer (Peer reviewed; Journal article, 2022-10-19)Forests sequester atmospheric carbon dioxide (CO2) which is important for climate mitigation. Net ecosystem production (NEP) varies significantly across forests in different regions depending on the dominant tree species, ... -
Estimating local-scale forest GPP in Northern Europe using Sentinel-2: Model comparisons with LUE, APAR, the plant phenology index, and a light response function
Junttila, Sofia; Ardö, Jonas; Cai, Zhanzhang; Jin, Hongxiao; Kljun, Natascha; Klemedtsson, Leif; Krasnova, Alisa; Lange, Holger; Lindroth, Anders; Mölder, Meelis; Noe, Steffen M.; Tagesson, Torbern; Vestin, Patrik; Weslien, Per; Eklundh, Lars (Peer reviewed; Journal article, 2023-01-03)Northern forest ecosystems make up an important part of the global carbon cycle. Hence, monitoring local-scale gross primary production (GPP) of Northern forest is essential for understanding climatic change impacts on ... -
Fjernmåling av barmasse - en skoghelsevariabel
Solberg, Svein; Lange, Holger; Næsset, Erik; Aurdal, Lars; Solberg, Rune (Glimt fra skogforskningen;1-2005, Others, 2005)Barmasse er sterkt knyttet til kronetetthet og til bladarealindeks (LAI), og er viktig for fjernmåling av skogens helsetilstand. Vi kan nå presentere foreløpige, men lovende resultater for måling av barmasse ved hjelp av ... -
Forest soil carbon changes from measurements and models - Site-specific comparisons and implications for UNFCCC reporting
Dalsgaard, Lise; Lange, Holger; Kjønnaas, O. Janne (NIBIO Rapport;3(114) 2017, Research report, 2017-10-18)For å verifisere beregningsmetoder og modeller for endringer av karbonlagre i skogsjord brukt i UNFCCC rapporteringen er det behov for data fra jordprøver med gjentak over tid og der prøvetakingsmetoder er konsistente. I ... -
Fra en til to generasjoner granbarkbille i Norge? Statusanalyse med data fra klekking og barkbilleovervåkingen.
Økland, Bjørn; Lange, Holger; Krokene, Paal; Buran, Rolf; Finne, Ellen A. (NIBIO-rapport;7(106) 2021, Research report, 2021-06)Overgang fra en til to generasjoner av stor granbarkbille med varmere klima vil kunne øke mengden av skader i norske skoger på grunn av to angrepsperioder. Sommertemperaturene i Norge har vært økende siden 1970-tallet og ... -
Fra en til to generasjoner granbarkbille i Norge? Statusanalyse med data fra klekking og barkbilleovervåkingen.
Økland, Bjørn; Lange, Holger; Krokene, Paal; Buran, Rolf; Finne, Ellen A. (NIBIO-rapport;7(106) 2021, Research report, 2021-06)Overgang fra en til to generasjoner av stor granbarkbille med varmere klima vil kunne øke mengden av skader i norske skoger på grunn av to angrepsperioder. Sommertemperaturene i Norge har vært økende siden 1970-tallet og ... -
Gap-filling continuously-measured soil respiration data: A highlight of time-series-based methods
Zhao, Junbin; Lange, Holger; Meissner, Helge Rainer (Peer reviewed; Journal article, 2020-05-15)Soil respiration is an important ecosystem process that releases carbon dioxide into the atmosphere. While soil respiration can be measured continuously at high temporal resolutions, gaps in the dataset are inevitable, ... -
Have precipitation extremes and annual totals been increasing in the world’s dry regions over the last 60 years?
Sippel, Sebastian; Zscheischler, Jakob; Heimann, Martin; Lange, Holger; Mahecha, Miguel D.; van Oldenborgh, Geert Jan; Otto, Friederike E.L.; Reichstein, Markus (Journal article; Peer reviewed, 2017-01-25)Daily precipitation extremes and annual totals have increased in large parts of the global land area over the past decades. These observations are consistent with theoretical considerations of a warming climate. However, ... -
Inter-individual variability in spring phenology of temperate deciduous trees depends on species, tree size and previous year autumn phenology
Marchand, Lorène Julia; Dox, Inge; Gričar, Jožica; Prislan, Peter; Leys, Sebastien; Van den Bulcke, Jan; Fonti, Patrick; Lange, Holger; Matthysen, Erik; Peñuelas, Josep; Zuccarini, Paolo; Campioli, Matteo (Peer reviewed; Journal article, 2020-05-29)We explored the inter-individual variability in bud-burst and its potential drivers, in homogeneous mature stands of temperate deciduous trees. Phenological observations of leaves and wood formation were performed weekly ... -
Livsløpsanalyser (LCA)
Dramstad, Wenche; Timmermann, Volkmar; Gobakken, Lone Ross; Lange, Holger; Dibdiakova, Janka (Fakta fra Skog og landskap;, Journal article, 2015)Livsløpsanalyser (LCA) er analyser der man tar hele produktets livsløp med i vurderingen. Metodikken ble opprinnelig utviklet for å vurdere ulike embalasjeprodukter, men er nå videreutviklet for å kunne brukes i svært mange ... -
Method comparison of indirect assessments of understory leaf area index (LAIu): A case study across the extended network of ICOS forest ecosystem sites in Europe
George, Jan-Peter; Yang, Wei; Kobayashi, Hideki; Biermann, Tobias; Carrara, Arnaud; Cremonese, Edoardo; Cuntz, Matthias; Fares, Silvano; Gerosa, Giacomo; Grünwald, Thomas; Hase, Niklas; Heliasz, Michael; Ibrom, Andreas; Knohl, Alexander; Kruijt, Bart; Lange, Holger; Limousin, Jean-Marc; Loustau, Denis; Lukeš, Petr; Marzuoli, Riccardo; Mölder, Meelis; Montagnani, Leonardo; Neirynck, Johan; Peichl, Matthias; Rebmann, Corinna; Schmidt, Marius; Serrano, Francisco Ramon Lopez; Soudani, Kamel; Vincke, Caroline; Pisek, Jan (Peer reviewed; Journal article, 2021-05-31)Leaf area index (LAI) is a key ecological indicator for describing the structure of canopies and for modelling energy exchange between atmosphere and biosphere. While LAI of the forest overstory can be accurately assessed ... -
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests
Pisek, Jan; Erb, Angela; Korhonen, Lauri; Biermann, Tobias; Carrara, Arnaud; Cremonese, Edoardo; Cuntz, Matthias; Fares, Silvano; Gerosa, Giacomo; Grünwald, Thomas; Hase, Niklas; Heliasz, Michal; Ibrom, Andreas; Knohl, Alexander; Kobler, Johannes; Kruijt, Bart; Lange, Holger; Leppänen, Leena; Limousin, Jean-Marc; Serrano, Francisco Ramon Lopez; Loustau, Denis; Lukes, Petr; Lundin, Lars; Marzuoli, Riccardo; Mölder, Meelis; Montagnani, Leonardo; Neirynck, Johan; Peichl, Matthias; Rebmann, Corinna; Rubio, Eva; Santos-Reis, Margarida; Schaaf, Crystal; Schmidt, Marius; Simioni, Guillaume; Soudani, Kamel; Vincke, Caroline (Peer reviewed; Journal article, 2021-01-27)Information about forest background reflectance is needed for accurate biophysical parameter retrieval from forest canopies (overstory) with remote sensing. Separating under- and overstory signals would enable more accurate ... -
Short-term effects of whole-tree harvesting on understory plant species diversity and cover in two Norway spruce sites in southern Norway
Økland, Tonje; Nordbakken, Jørn-Frode; Lange, Holger; Røsberg, Ingvald; Clarke, Nicholas (Journal article; Peer reviewed, 2016-04-06)Effects of clear-cut harvesting on ground vegetation plant species diversity and their cover are investigated at two Norway spruce sites in southern Norway, differing in climate and topography. Experimental plots at these ... -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2021
Timmermann, Volkmar; Børja, Isabella; Clarke, Nicholas; Eriksen, Rune; Gohli, Jostein; Hylen, Gro; Jepsen, Jane Uhd; Krokene, Paal; Lange, Holger; Meissner, Helge Rainer; Nagy, Nina Elisabeth; Nordbakken, Jørn-Frode; Solberg, Sverre; Solheim, Halvor; Vindstad, Ole Petter Laksforsmo; Økland, Bjørn; Aas, Wenche (NIBIO Rapport, Research report, 2023)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede ... -
Tårn som måler skogens karbonfangst
Lange, Holger; Helgheim, Beatrice (Journal article, 2022)Klimaet forandrer seg, og vi vet at stigende temperaturer henger sammen med menneskeskapte utslipp av drivhusgasser til atmosfæren. Plantene tar opp rundt en fjerdedel av det vi slipper ut, men fluksene av drivhusgasser ...