Browsing NIBIO Brage by Author "Bright, Ryan M."
Now showing items 1-20 of 24
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A sensible climate solution for the boreal forest
Astrup, Rasmus Andreas; Bernier, Pierre Y.; Genet, Helene; Lutz, David A.; Bright, Ryan M. (Journal article; Peer reviewed, 2018-01-02)Climate change could increase fire risk across most of the managed boreal forest. Decreasing this risk by increasing the proportion of broad-leaved tree species is an overlooked mitigation–adaption strategy with multiple benefits. -
An enhanced forest classification scheme for modeling vegetation–climate interactions based on national forest inventory data
Majasalmi, Titta; Eisner, Stephanie; Astrup, Rasmus Andreas; Fridman, Jonas; Bright, Ryan M. (Journal article; Peer reviewed, 2018-01-18)Forest management affects the distribution of tree species and the age class of a forest, shaping its overall structure and functioning and in turn the surface–atmosphere exchanges of mass, energy, and momentum. In order ... -
A chlorophyll-deficient, highly reflective soybean mutant: radiative forcing and yield gaps
Genesio, L.; Bright, Ryan M.; Alberti, G.; Peressotti, A.; Vedove, G. Delle; Incerti, G.; Toscano, P.; Rinaldi, M.; Muller, O.; Miglietta, F. (Peer reviewed; Journal article, 2020-06-22)Sunlight absorbed at the Earth’s surface is re-emitted as longwave radiation. Increasing atmospheric concentrations of CO2 and other greenhouse gases trap an increasing fraction of such heat, leading to global climate ... -
Climate change mitigation potential of biochar from forestry residues under boreal condition
Hagenbo, Andreas; Antón-Fernández, Clara; Bright, Ryan M.; Rasse, Daniel; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2021-10-18)Forest harvest residue is a low-competitive biomass feedstock that is usually left to decay on site after forestry operations. Its removal and pyrolytic conversion to biochar is seen as an opportunity to reduce terrestrial ... -
Climate-growth relationships for Norway spruce and Scots pine remained relatively stable in Norway over the past 60 years despite significant warming trends
Merlin, Morgane; Hylen, Gro; Vergarechea, Marta; Bright, Ryan M.; Eisner, Stephanie; Solberg, Svein (Peer reviewed; Journal article, 2024-08-01)Forests, especially in the northern latitudes, are vulnerable ecosystems to climate change, and tree-ring data offer insights into growth-climate relationships as an important effect. Using the National Forest Inventory ... -
A Cloud-Free Approach to Modeling Daily Downwelling Longwave Irradiance at Global Scale
Bright, Ryan M.; Eisner, Stephanie (Peer reviewed; Journal article, 2023-06-27)Parametric modeling of downwelling longwave irradiance under all-sky conditions (LW↓) typically involves “correcting” a clear- (or non-overcast) sky model estimate using solar-irradiance-based proxies of cloud cover in ... -
CO2-equivalence metrics for surface albedo change based on the radiative forcing concept: a critical review
Bright, Ryan M.; Lund, Marianne Tronstad (Journal article, 2021-07-01)Management of Earth’s surface albedo is increasingly viewed as an important climate change mitigation strategy both on (Seneviratne et al., 2018) and off (Field et al., 2018; Kravitz et al., 2018) the land. Assessing the ... -
Combining MODIS and National Land Resource Products to Model Land Cover-Dependent Surface Albedo for Norway
Bright, Ryan M.; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2019-04-10)Surface albedo is an important physical attribute of the climate system and satellite retrievals are useful for understanding how it varies in time and space. Surface albedo is sensitive to land cover and structure, which ... -
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 ... -
Compositional and structural stratification does not improve direct estimation of Sentinel-2-derived surface albedo in Fennoscandian forests
Bright, Ryan M.; Ramtvedt, Eirik Næsset (Peer reviewed; Journal article, 2024-10-09)Monitoring surface albedo at a fine spatial resolution in forests can enrich process understanding and benefit ecosystem modeling and climate-oriented forest management. Direct estimation of surface albedo using 10 m ... -
Detecting change-point, trend, and seasonality in satellite time series data to track abrupt changes and nonlinear dynamics: A Bayesian ensemble algorithm
Zhao, Kaiguang; Wulder, Michael A.; Hu, Tongxi; Bright, Ryan M.; Wu, Qiusheng; Qin, Haiming; Li, Yang; Toman, Elizabeth; Mallick, Bani; Zhang, Xuesong; Brown, Molly (Peer reviewed; Journal article, 2019-10)Satellite time-series data are bolstering global change research, but their use to elucidate land changes and vegetation dynamics is sensitive to algorithmic choices. Different algorithms often give inconsistent or sometimes ... -
Developing a monthly radiative kernel for surface albedo change from satellite climatologies of Earth's shortwave radiation budget: CACK v1.0
Bright, Ryan M.; O'Halloran, Thomas L. (Journal article; Peer reviewed, 2019-09-09)Due to the potential for land-use–land-cover change (LULCC) to alter surface albedo, there is need within the LULCC science community for simple and transparent tools for predicting radiative forcings (ΔF) from surface ... -
Evaluating the terrestrial carbon dioxide removal potential of improved forest management and accelerated forest conversion in Norway
Bright, Ryan M.; Allen, Micky; Antón-Fernández, Clara; Belbo, Helmer; Dalsgaard, Lise; Eisner, Stephanie; Granhus, Aksel; Kjønaas, O. Janne; Søgaard, Gunnhild; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2020-06-19)As a carbon dioxide removal measure, the Norwegian government is currently considering a policy of large-scale planting of spruce (Picea abies (L) H. Karst) on lands in various states of natural transition to a forest ... -
Evaluation of leaf-level optical properties employed in land surface models
Majasalmi, Titta; Bright, Ryan M. (Journal article; Peer reviewed, 2019-09-05)Vegetation optical properties have a direct impact on canopy absorption and scattering and are thus needed for modeling surface fluxes. Although plant functional type (PFT) classification varies between different land ... -
Importance of Surface Roughness for the Local Biogeophysical Effects of Deforestation
Winckler, J; Reick, C. H.; Bright, Ryan M.; Pongratz, J. (Journal article; Peer reviewed, 2019-08-14)Deforestation influences surface properties such as surface roughness, resulting in changes in the surface energy balance and surface temperature. Recent studies suggest that the biogeophysical effects are dominated by ... -
Inferring Surface Albedo Prediction Error Linked to Forest Structure at High Latitudes
Bright, Ryan M.; Eisner, Stephanie; Lund, Marianne Tronstad; Majasalmi, Titta; Myhre, Gunnar; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018-05-17)Predicting the surface albedo of a forest of a given species composition or plant functional type is complicated by the wide range of structural attributes it may display. Accurate characterizations of forest structure are ... -
Oppdatering av kunnskapsgrunnlag for klimatiltak i skog: Gjennomgang av 11 utvalgte tiltak i bestandsskogbruket
Søgaard, Gunnhild; Bright, Ryan M.; Clarke, Nicholas; Fløistad, Inger; Granhus, Aksel; Hagenbo, Andreas; Hanssen, Kjersti Holt; Hietala, Ari Mikko; Kjønaas, Janne O.; Kuehne, Christian; Rolstad, Jørund; Solberg, Svein; Steffenrem, Arne; Stokland, Jogeir Nicolai; Storaunet, Ken Olaf (NIBIO Rapport, Research report, 2023)På oppdrag fra Miljødirektoratet og Landbruksdirektoratet har vi gått gjennom kunnskapsstatus på 11 ulike tiltak utvalgt av direktoratene. Alle tiltakene ligger innenfor det tradisjonelle bestandsskogbruket. Tiltakene er ... -
Quantifying regional surface energy responses to forest structural change in Nordic Fennoscandia
Kumkar, Yogesh; Astrup, Rasmus Andreas; Stordal, Frode; Bright, Ryan M. (Peer reviewed; Journal article, 2020-07-16)In a climate model, surface energy and water fluxes of the vegetated ecosystem largely depend on important structural attributes like leaf area index and canopy height. For forests, management can greatly alter these ... -
Radiative forcing bias of simulated surface albedo modifications linked to forest cover changes at northern latitudes
Bright, Ryan M.; Myhre, Gunnar; Astrup, Rasmus Andreas; Antón-Fernández, Clara; Strømman, Anders Hammer (Journal article; Peer reviewed, 2015-04-15) -
Recent strengthening of snow and ice albedo feedback driven by Antarctic sea-ice loss
Riihelä, Aku; Bright, Ryan M.; Anttila, Kati (Peer reviewed; Journal article, 2021-10-28)The decline of the Arctic cryosphere during recent decades has lowered the region’s surface albedo, reducing its ability to reflect solar radiation back to space. It is not clear what role the Antarctic cryosphere plays ...