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Lambert, Marius; Tang, Hui; Aas, Kjetil Schanke; Stordal, Frode; Bjerke, Jarle Werner & Fisher, Rosie
[Vis alle 10 forfattere av denne artikkelen]
(2023).
Winter survival of vegetation in the Arctic-boreal region: Integrating cold hardiness and frost mortality schemes into CLM-FATES.
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Bjerke, Jarle W.; Tallaksen, Lena M.; Stordal, Frode & Yilmaz, Yeliz A.
(2023).
EMERALD Open Science Day - Summary of Group Discussions.
Vis sammendrag
Group discussions, key questions:
How to move from single discipline to multidisciplinary studies?
Which processes are missing in terms of plant-climate interactions for improving models?
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Bryn, Anders; Horvath, Peter; Torma, Michal; Naas, Adam Eindride; Volden, Inger Kristine & Liahjell, Gunnar Thorsen
[Vis alle 10 forfattere av denne artikkelen]
(2022).
Treeline research at Natural history museum (UiO)
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon; Gascoin, Simon; Pirk, Norbert & Remmers, Janneke
[Vis alle 8 forfattere av denne artikkelen]
(2022).
Evaluating modeled snow cover dynamics over Fennoscandia using Earth observations and reanalyses
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon; Gascoin, Simon; Pirk, Norbert & Remmers, Janneke
[Vis alle 8 forfattere av denne artikkelen]
(2022).
Evaluating modeled snow cover dynamics over Fennoscandia using Earth observations.
Vis sammendrag
The snow cover is an essential part of the climate system in cold regions through its effects on the terrestrial water, energy, and carbon balance. Due to the high spatiotemporal variability of snow, it is challenging to resolve snow cover dynamics in models. Thus, our ability to improve the representation of these dynamics in Earth System Models (ESMs) leans heavily on the accuracy and representativeness of the observational data sets used for model evaluation.
The big picture provided by the long-term climate data record from satellites helps us to monitor changes in land cover over large areas. At the same time, rapidly developing drone and terrestrial imaging technology provides higher resolution information over specific areas. This complimentary information from spaceborne, airborne, and terrestrial Earth observations is invaluable for better understanding the complex processes in the climate system. In our work, we are currently exploiting estimates of snow-covered area from different optical sensors onboard polar orbiting satellites that are imaging the Nordic region. Drone and terrestrial images are being explored as a source of validation and calibration data for the satellite products.
Having representative snow cover maps enables us to better evaluate the terrestrial component of the Norwegian Earth System Model (NorESM), namely the Community Land Model (CLM5). With a focus on snow processes, we are conducting an analysis using satellite-based estimates of snow-covered area (MODIS, Sentinel-2, and Landsat 8), snow simulations from CLM5, snow variables from several climate reanalyses (ERA5, ERA5-Land, and MERRA-2), and in-situ data from eddy covariance stations (LATICE flux sites). Two offline CLM5 simulations are conducted with different atmospheric forcing, namely the default data set (GSWP3) and ERA5. We are investigating trends in the snow cover phenology, which we characterize using snow cover duration, first and last days of the snow cover, and consecutive snow cover days for each snow season over the last two decades. This work illuminates a path to integrate Earth observations with Earth system modeling in cold environments to both identify and constrain sources of uncertainty.
Acknowledgement: This ongoing study is supported by the LATICE (Land-ATmosphere Interactions in Cold Environments) strategic research initiative funded by the University of Oslo, and the project EMERALD (294948) funded by the Research Council of Norway.
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Orsolini, Yvan J.; Guttu, Sigmund; Stordal, Frode; Otterå, Odd Helge & Omrani, Nour-Eddine
(2022).
The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation.
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Bryn, Anders; Vollsnes, Ane Victoria & Stordal, Frode
(2022).
Skogen utfordres i nytt klima.
Nationen.
ISSN 0805-3782.
s. 20–20.
Vis sammendrag
Politikk som skal være grønn og klimavennlig kan ikke lene seg for kraftig på de grønne økosystemene. Eller satse på at de kan endres til vår fordel. Det er for risikabelt.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Falk, Stefanie; Stordal, Frode & Berntsen, Terje Koren
(2022).
Ozone-induced early senescence studied in Trifolium repens genotypes from subarctic grasslands .
Vis sammendrag
Previous experiments have shown that several European clovers may develop more visible injuries due to ozone when the night is not dark. At high latitudes, the summer nights are bright, giving the background for the question whether plants adapted to midnight sun also have this response of being more easily injured by ozone when the night is not dark.
The plants included in the present experiment are expected to be adapted to light exposure during night, since there is midnight sun from the time they melt out of the snow cover in spring until the end of July, in the sites where they were collected. This constitutes about 50 % of the growing season for grassland species in these areas.
Cuttings of two genotypes of white clover (Trifolium repens) collected in two sites in subarctic Norway were cultivated under controlled environment conditions. Using a factorial design, the plants were exposed to two different night-time light conditions and two different ozone exposure levels. We studied the development of visible injuries, foliar chlorophyll concentrations and N concentration as signs of premature senescence due to ozone.
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Vollsnes, Ane Victoria; Bryn, Anders & Stordal, Frode
(2022).
Fotosyntesen redder ikke klimaet.
Nationen.
ISSN 0805-3782.
s. 19–19.
Vis sammendrag
Gjennom fotosyntesen tar plantene opp mye av de menneskeskapte klimagassutslippene. Tørke, brann, insektutbrudd og vindfall skaper imidlertid problemer for økosystemenes opptak og lagring av karbon.
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Lambert, Marius; Aas, Kjetil Schanke; Tang, Hui; Stordal, Frode & Parmentier, Frans-Jan
(2021).
Modelling insights into the effects of hardening during extreme winter root water release.
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon; Gascoin, Simon; Stordal, Frode & Tallaksen, Lena M.
(2021).
Fennoscandian snow cover dynamics in the MODIS era.
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Vollsnes, Ane Victoria; Falk, Stefanie; Eriksen, Aud Else Berglen; Stordal, Frode; Kauserud, Håvard & Berntsen, Terje Koren
(2021).
Luftforurensning og klimaendringer gir dobbelt stress for vegetasjonen.
Naturen.
ISSN 0028-0887.
5,
s. 265–271.
doi:
10.18261/issn.1504-3118-2021-05-10.
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Vollsnes, Ane Victoria; Falk, Stefanie; Berglen eriksen, Aud; Emberson, Lisa D.; O’Neill, Connie & Stordal, Frode
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Model parameterisation of subarctic vegetation in climate models, an example from an ozone effect study.
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Vollsnes, Ane Victoria; Stordal, Frode; Falk, Stefanie; Eriksen, Aud Berglen; Kauserud, Håvard & Berntsen, Terje Koren
(2021).
Field and lab experiments, plant ecophysiology starting from The double punch.
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Tang, Hui & Stordal, Frode
(2021).
Unravelling the puzzle of Arctic vegetation-climate interactions in Earth System Models.
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Narayanappa, Devaraju; Berntsen, Terje Koren & Stordal, Frode
(2021).
Simulated runoff and river discharge in CTSM version 5.1:
Evaluation over Scandinavia.
Vis sammendrag
Reliable representation of terrestrial water and energy balance in global climate models is crucial to better understand the response of the hydrological cycle to climate change. Though the current generation of global climate models have improved substantially, they still fail to represent all terrestrial processes adequately. Specifically simulating runoff and river discharge are important for many applications such as water resources management and future water availability projections. In this study, we use the land surface model component of the Norwegian Earth System Model which is Community Land Model version 5 (CLM5) to evaluate against observation-based estimates of runoff and river discharge data of selected catchments data. For the latest three decades (1985-2015), we compare the CLM5 simulated grid-scale runoff with observation-based gridded runoff estimates (E-RUN version 1.1) and with data from the Global Runoff Data Centre (GRDC). CLM5 is also capable of simulating river discharge to the oceans through the Model for Scale Adaptive River Transport (MOSART) and is applicable across local, regional, and global scales. The 3-hourly 0.5o meteorological forcing for CLM5 was provided by the Global Soil Wetness Project version 3v1, an international land surface modeling project. We also compare the simulated river discharge data with selected station discharge data in Norway and Sweden. I will present the detailed evaluation results at the conference. Briefly, the evaluation analysis suggests the further calibration to hydrologic parameters is needed to improve simulations of runoff and river discharge, especially subsurface runoff.
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon; Gascoin, Simon; Stordal, Frode & Tallaksen, Lena M.
(2021).
Benchmarking CLM5 snow cover dynamics with MODIS and reanalyses over Fennoscandia
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Falk, Stefanie; Vollsnes, Ane Victoria; Eriksen, Aud E Berglen; Emberson, Lisa D.; O'Neill, Connie & Stordal, Frode
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Charakterisierung der subarktischen Ökozone hinsichtlich der Modellierung von Ozonverschmutzung und Klimarisiken.
Vis sammendrag
https://www.dpg-verhandlungen.de/year/2021/conference/smuk/part/up/session/5/contribution/2?lang=en
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Falk, Stefanie; Lombardozzi, Danica; Vollsnes, Ane Victoria; Stordal, Frode; Berntsen, Terje Koren & Eriksen, Aud Else Berglen
(2021).
OzoneLUNA: Ozone damage in CLM revisited.
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Falk, Stefanie; Vollsnes, Ane Victoria; Emberson, Lisa D.; O'Neill, Connie; Eriksen, Aud E Berglen & Stordal, Frode
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Characterizing subarctic biomes for land surface modeling of pollution and climate risk.
Vis sammendrag
Here we assess the importance of characterization of key meteorological variables and air pollution profiles on the modeled susceptibility of subarctic vegetation to ozone. Changes in climate (e.g. temperature, water availability) will manifest in both direct and indirect effects influencing the species' sensitivity to air pollution. A likely increase in frequency of persistent heatwaves in the future, will inflict heat related stress while generating favorable conditions for the formation of ambient air ozone, e.g. due to wildfires.
We have monitored ambient air ozone concentrations at the Norwegian Institute of Bioeconomy Research (NIBIO) Environment Centre Svanhovd in Northern Norway in the vegetation period 2018/19. Due to data acquisition problems, ozone concentrations for two weeks in July 2018 were missing from our record. We present a reconstruction based on probability density function with respect to the Swedish and Finnish atmospheric monitoring sites and compare with available surface ozone products for the region. Over all, ozone concentrations did not differ significantly between the two years. While temperatures and global irradiance diverged substantially from the multi annual mean precipitation varied only to some extend.
We investigate the difference in uptake of ozone using the DO3SE model, for typical vegetation at the location. We find that bespoke parameterization for subarctic vegetation is essential for an accurate estimation of Phototoxic Ozone Dose (POD) and an assessment of damage risk. Accurate estimates of the start and length of growing season are also crucial. We find that temperature and its derivative vapor pressure deficit are likely the most important climate variables while the variability of ozone concentration within climatologically reasonable limits plays a minor role.
The use of subarctic parameterization suggests an improvement in risk assessment as POD values are increased in 2018; corroborated by evidence of visible injury in the Svanhovd ozone garden.
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Bryn, Anders; Dalen, Thea Grobstok; Finne, Eirik Aasmo; Heiberg, Hanne; Keetz, Lasse Torben & Nilsen, Irene Brox
[Vis alle 30 forfattere av denne artikkelen]
(2021).
Natur i endring - samspillet mellom klima og økosystemene.
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Tang, Hui; Aas, Kjetil Schanke; Finne, Eirik Aasmo; Althuizen, Inge; Fisher, Rosie A. & Tømmervik, Hans
[Vis alle 14 forfattere av denne artikkelen]
(2021).
The impact of moss and lichen on hydrological cycle at surface: a study using CLM-FATES.
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Orsolini, Yvan J.; Guttu, Sigmund; Stordal, Frode; Otterå, Odd Helge; Omrani, Nour-Eddine & Tartaglione, Nazario
[Vis alle 9 forfattere av denne artikkelen]
(2021).
Impacts of UV Irradiance and Particle Precipitation on the North Atlantic Oscillation During the 11-year Solar Cycle.
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Guttu, Sigmund; Orsolini, Yvan J.; Stordal, Frode; Otterå, Odd Helge & Omrani, Nour-Eddine
(2021).
The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation.
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Orsolini, Yvan J.; Guttu, Sigmund & Stordal, Frode
(2021).
Impact of Medium-Energy Electron Precipitation on the Middle Atmosphere and on Climate in Decadal Simulations.
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Stordal, Frode
(2020).
Complexity revealed in the greening of the Arctic.
Nature Climate Change.
ISSN 1758-678X.
doi:
10.1038/s41558-019-0688-1.
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Lambert, Marius Stephane Astrid; Tang, Hui; Stordal, Frode; Aas, Kjetil Schanke & Parmentier, Frans-Jan W.
(2020).
Causes of plant mortality from extreme winter events: model insights into desiccation processes during frost droughts.
Vis sammendrag
Arctic and boreal vegetation has experienced significant change during the last decades. Shrubs have grown larger, and trees expand northwards and move upwards along mountain slopes. Although the overall living biomass has gone up, there are significant areas across the Arctic that experienced a decrease in vegetation productivity in recent years – a phenomenon, called "Arctic browning". Part of the reason for arctic browning is a vulnerability to a growing number of extreme weather events associated with climate change. Extreme winter events can initiate icing, loss of frost tolerance, and frost droughts that lead to vegetation damage and death of tissues. While frost droughts are not as well-documented as summer droughts, they are the cause of a considerable proportion of observed damage. They have been suggested to occur when sudden warm events trigger leaf transpiration combined with deeply frozen soils due to the lack of snow that prevent plants from replenishing leaf water loss from soil.
Most terrestrial biosphere models represent plant water transport as one single resistance term, or ignore plant hydraulics completely. As a result, leaf transpiration is too strongly regulated by soil water stress, and the disparity between leaf transpiration and soil water stress as expected in frost droughts can hardly be depicted by the models. Recent incorporation of much more detailed plant hydraulic modules, based on tissue (root,stem,leaf) level traits, however, opens up the possibility to properly represent frost droughts experienced by plants, and to investigate how frost droughts impact land-atmosphere interactions.
In this study, we used the FATESHydro, a cohort model of vegetation coexistence and competition, driven by high resolution atmospheric forcing derived from COSMO-REA6, to evaluate how frost droughts impact vegetation mortality in northern Norway over the period 2012-2020. We established a clear link between snow depth and drought intensity. We show that root water exudation at low soil water potentials, rather than leaf transpiration loss at high vapor pressure deficit, explained tissue desiccation during shallow snow covered winters. We describe which areas of our domain (northern Norway) are most vulnerable and have been strongly hit by frost droughts over the period 2012-2020.
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon Vincent P; Stordal, Frode & Tallaksen, Lena M.
(2020).
The Representation of the Fennoscandian Snow Cover Phenology in Reanalyses and CLM5 during the MODIS-era.
Vis sammendrag
Snow plays an important role in cold regions through its effect on the terrestrial exchange of energy, water, and carbon. Accurately simulating snow processes is therefore important in capturing various climate feedbacks in Earth system models. The representation of the subgrid heterogeneity of snow properties (e.g. coverage, depth, density, albedo) are, in addition to accumulation and snowmelt, major sources of uncertainty in the snow modules of land surface schemes. Using multiple data sources is essential to address these uncertainties and to evaluate overall model performance. Unlike in-situ observations, satellite remote sensing products provide unique representative information at the scale of Earth system models. The Moderate Resolution Imaging Spectroradiometer (MODIS) sensor onboard the Aqua and Terra satellites provide a continuous long-term climate record for the last two decades.
In this study, two daily snow cover data sets from MODIS (MOD10A1 and MYD10A1) were used to retrieve fractional snow-covered area (fSCA) and several snow cover metrics (e.g. snow cover duration, first and last day of snow) over Fennoscandia for the 2001-2020 water years. We use these retrievals to evaluate the fSCA outputs from multiple reanalyses (ERA5-Land, ERA5, and MERRA-2) and the latest version of the Community Land Model (CLM5) which is the land component of the Community Earth System Model (CESM) and the Norwegian Earth System Model (NorESM). In order to test the accuracy of the MODIS data, we employed Sentinel-2 and Landsat 8 satellite retrievals as well as local‐scale measurements around the Finse Eco-Hydrological Observatory (Finse EcHO), a low-alpine site in central Norway. Lastly, we compared the trends in snow cover metrics with terrestrial water storage anomalies obtained from the Gravity Recovery and Climate Experiment (GRACE) to better understand the regional water cycle dynamics over this region. This study provides a useful starting point for integrating Earth observations into Earth system modeling in cold regions to help identify and constrain sources of uncertainty.
Acknowledgement : This study is conducted under the LATICE strategic research initiative funded by the Faculty of Mathematics and Natural Sciences at the University of Oslo, and the EMERALD (project #294948) funded by the Research Council of Norway.
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Yilmaz, Yeliz A.; Aalstad, Kristoffer; Filhol, Simon Vincent P; Stordal, Frode & Tallaksen, Lena M.
(2020).
Fennoscandian snow cover phenology from MODIS, CLM5, and climate reanalyses.
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Stordal, Frode
(2020).
Dissolved organic matter: From atmosphere to rivers and lakes.
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Vollsnes, Ane Victoria; Falk, Stefanie; Eriksen, Aud Else Berglen; Stordal, Frode; Kauserud, Håvard & Berntsen, Terje Koren
[Vis alle 9 forfattere av denne artikkelen]
(2020).
The double punch: ozone and climate stresses on vegetation.
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Falk, Stefanie; Vollsnes, Ane Victoria; Stordal, Frode; Eriksen, Aud Else Berglen & Berntsen, Terje Koren
(2020).
Surface Ozone in Northern Scandinavia and Implications on Local Vegetation - A Case Study.
Vis sammendrag
The Arctic biosphere is subject to comprehensive changes induced by climate change. The highly specialized subartic vegetation will be challenged by both, changing environmental conditions as well as further interference through human activity. Permission of exploitation of natural resources in the Artic is likely to increase the levels of air pollutants which are precursors to ozone.
n the course of our project (OzoNorClim: The Double Punch), we had an ozone monitor installed at the Norwegian Institute for Bioeconomic Research (NIBIO) Svanhovd Research Station operated by the Norwegian Institute for Air Research (NILU). In 2018, a long-lasting heatwave accompanied by extensive forest fires across Europe and Scandinavia enhanced surface ozone concentrations by about 2 ppt above the climatological mean in Northern Scandinavia. Ozone sensitive glover species in the ozone garden at Svanhovd showed clear signs of ozone damage in 2018 but not in 2019. We study these two years as example for probable future scenarios in which both heat stress and ozone stress affect vegetation negatively. We look at the corresponding surface ozone concentrations, accumulated ozone dose, and implications on natural and semi-natural vegetation especially in the Pasvik valley in Northern Norway, put these in a larger regional context, and give an outlook on further modelling work.
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Guttu, Sigmund; Orsolini, Yvan J.; Stordal, Frode; Limpasuvan, Varavut & Marsh, Daniel R.
(2020).
Impact of Medium-Energy Electron Precipitation on Ozone and Middle Atmosphere Dynamics in WACCM Simulations.
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Yilmaz, Yeliz; Tallaksen, Lena M. & Stordal, Frode
(2020).
Hydroclimatological evaluation of CLM5 simulations using multiple data sources for land-atmosphere interaction studies over Scandinavia.
Vis sammendrag
Arctic amplification leads to rapid changes in the terrestrial water and energy balances at high northern latitudes. Advances in Earth System Models (ESMs) is improving our understanding of the underlying feedback mechanisms leading to these changes. The representation of the land surface in ESMs is essential to simulate and understand changes at the global and regional scales. The latest version of the land component of the Norwegian Earth System Model (NorESM), namely the Community Land Model (CLM5), has received substantial new implementations to help simulate the land surface processes in cold environments. At the same time, the behaviour of offline CLM5 simulations and new observational data sets have not been systematically compared over Scandinavian regions. In this study, we run the CLM5 model at relatively high resolution (0.25 degrees) over Scandinavia (including Svalbard) for 15 years between 2002 and 2016. We evaluate the water and energy budget components of CLM5 using several reanalyses and satellite-based observational data sets. In particular, we use monthly model outputs and compare with the satellite retrievals from GRACE, MODIS, AMSR2, and AMSR-E, and reanalysis data sets from ERA5, GLDAS, and MERRA-2. As an additional data source, we use the local‐scale measurements obtained from the Finse Eco-Hydrological Observatory (Finse EcHO) at 1200 m a.s.l, and the high-Arctic research site at Bayelva near Ny-Ålesund, Svalbard. Our investigation is focused on several variables including terrestrial water storage, snow water equivalent, turbulent fluxes, net radiation, and skin temperature. The results indicate that the perceived performance of the land surface model (CLM5) depends strongly on the reference observational data set. Regional discrepancies between data sets, particularly for Svalbard, prompts further investigation of the underlying sources of uncertainty. The results of this evaluation provide a valuable source of information for future studies in the region, particularly in the Land-ATmosphere Interactions in Cold Environments (LATICE) project, which focuses on cold region land surface dynamics, integrating across observational systems, laboratory experiments, field, and modeling efforts.
Acknowledgement : This study is conducted under the LATICE strategic research initiative funded by the Faculty of Mathematics and Natural Sciences at the University of Oslo, and the project EMERALD (294948) funded by the Research Council of Norway.
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Bryn, Anders; Hessen, Dag Olav & Stordal, Frode
(2020).
Før det bikker over.
Klassekampen.
ISSN 0805-3839.
s. 18–19.
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Lieungh, Eva; Bryn, Anders; Stordal, Frode; Bjerke, Jarle W.; Tonjer, Lea-Rebekka & Bright, Ryan M.
(2020).
Norske fjell gror igjen i et varmere klima.
Aftenposten (morgenutg. : trykt utg.).
ISSN 0804-3116.
s. 20–21.
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Stordal, Frode
(2019).
Improved representation of ecosystem-climate interactions in NorESM.
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Yilmaz, Yeliz; Tallaksen, Lena M. & Stordal, Frode
(2019).
Assessment of the water and energy balance simulations of CTSM using satellite-based observations over Scandinavia.
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Byre, Hanne Eline; Falk, Stefanie; Stordal, Frode & Berntsen, Terje Koren
(2019).
An Investigation of Source Regions Contributing to the Deposition of Reactive Nitrogen in Arctic and Boreal Areas.
Vis sammendrag
Long range atmospheric transport is an important source of reactive nitrogen (Nr) to Boreal and Artic ecosystems. The combined effect of climate change and deposition of reactive nitrogen which is an important nutriant for these systems, have the potential to change the carbon storage in high latitude reservoirs. Furthermore a change in vegetation, will lead to changes in the exchange of energy and humidity between the land surface and the atmosphere. We have conducted several model studies to investigate and quantify the importance and contribution of distinguished source regions to Nr deposition in polar and sub-polar regions in the northern hemisphere. Using a global chemistry transport model, we will assess the following questions: To what extent are emissions from agriculture in South-Asia affecting NOx deposition in the Arctic? What would happen if we shut down the automotive sector in Germany, do we see a reduction in the amount of NOx deposited in Norway?
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Falk, Stefanie; Stordal, Frode & Vollsnes, Ane Victoria
(2019).
Ozon und seine Auswirkungen auf die Vegetation in Nordskandinavien.
Vis sammendrag
Ozon ist eines der wichtigsten Spurengasen in der Atmosphäre. Während es uns in Form der Ozonschicht in der Stratosphäre vor schädlicher, kurzwelliger Strahlung schützt, zählt es in der planetaren Grenzschicht zu den überaus schädlichen Reizgasen. Eine Aufnahme einer Dosis von 50 ppm über die Dauer von 30 min gilt für den Menschen als tödlich. Pflanzen nehmen Ozon durch ihre Stoma auf, wo dieses zur Zerstörung von Zellen beiträgt, die der Photosynthese dienen, und letztlich Wachstum und Ertrag reduziert. Die empfindlichen Ökosysteme im Norden Skandinaviens erfahren bereits durch den Klimawandel einen erhöhten Stress. Sollte das Polarmeer dauerhaft eisfrei werden, so würde sich der Schiffsverkehr und damit die Menge der Ozonvorläufersubstanzen drastisch erhöhen. Insbesondere während des Polarsommers ist eine nächtliche Reparatur der entstandenen Ozonschäden gehindert. Wir präsentieren hier einen Überblick über die schädlichen
Auswirkungen von Ozon auf Vegetation und erste Studien zu der Entwicklung von Ozonkonzentrationen in Nordskandinavien. Dabei greifen wir sowohl auf Langzeitmessungen als auch Modellsimulationen zurück.
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Stordal, Frode & Vollsnes, Ane Victoria
(2019).
Eksos har skylden: Ozon på bakken skader avlingene.
[Fagblad].
Apollon.
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Stordal, Frode
(2019).
Vegetation-climate interactions: observations and modelling.
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Stordal, Frode
(2019).
Ecosystem-climate interactions.
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Stordal, Frode
(2019).
Interdisciplinary research in the EMERALD project.
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Stordal, Frode
(2019).
Our EMERALD planet: Terrestrial ecosystem-climate interactions .
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Stordal, Frode
(2019).
Terrestrial ecosystem-climate interactions of our EMERALD planet.
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Vollsnes, Ane Victoria; Stordal, Frode & Vogt, Yngve
(2019).
Eksos har skylden: Ozon på bakken skader avlingene.
[Tidsskrift].
Apollon.
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Guttu, Sigmund; Orsolini, Yvan; Stordal, Frode; Limpasuvan, Varavut & Marsh, D.
(2019).
Impact of medium-energy electron precipitation on ozone and middle atmosphere dynamics in WACCM simulations.
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Orsolini, Yvan; Guttu, Sigmund; Stordal, Frode & Limpasuvan, Varavut
(2019).
Impact of Medium-energy Electron Precipitation on Ozone and Middle Atmosphere Dynamics in WACCM Simulations.
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Pirk, Norbert; Ramtvedt, Eirik Næsset; Decker, Sven; Cassiani, Massimo; Burkhart, John & Stordal, Frode
[Vis alle 7 forfattere av denne artikkelen]
(2019).
Causes of surface energy imbalances of eddy covariance measurements in mountainous terrain.
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Bryn, Anders; Volden, Inger Kristine; Horvath, Peter; Torma, Michal & Stordal, Frode
(2019).
Hvor raskt stiger tre- og skoggrensene i Norge? Folkeforskning i praksis.
.
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Kumkar, Yogesh; Astrup, Rasmus Andreas; Stordal, Frode; Tang, Hui & Bright, Ryan M.
(2018).
Investigating the sensitivity representation of forest management on surface energy and water fluxes in a land surface model.
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Smith-Johnsen, Christine; Marsh, Daniel R.; Orsolini, Yvan; Nesse Tyssøy, Hilde; Sandanger, Marit Irene J. & Ødegaard, Linn-Kristine Glesnes
[Vis alle 7 forfattere av denne artikkelen]
(2018).
Nitric oxide response to the April 2010 electron precipitation event.
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Stordal, Frode; Berntsen, Terje Koren; Büker, Patrick; Falk, Stefanie; Rydsaa, Johanne Hope & Gillies, David
[Vis alle 7 forfattere av denne artikkelen]
(2018).
Ozone and climate stresses on sub-ARctic tundra vegetation: Modelling of stomatal fluxes in midnight sun.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Falk, Stefanie; Berntsen, Terje Koren; Kauserud, Håvard & Emberson, Lisa D.
[Vis alle 7 forfattere av denne artikkelen]
(2018).
Project The double punch: ozone and climate stresses on vegetation.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Falk, Stefanie; Bryn, Anders; Viken, Jeanette & Stordal, Frode
(2018).
Ozonforurensning. Klima, vegetasjon og matproduksjon.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Kauserud, Håvard; Berntsen, Terje Koren & Stordal, Frode
(2018).
The double punch: ozone and climate stresses on vegetation.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Berntsen, Terje Koren; Kauserud, Håvard; Büker, Patrick & Emberson, Lisa D.
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The double punch: ozone and climate stresses to sub-Arctic vegetation.
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Vollsnes, Ane Victoria; Eriksen, Aud Berglen; Büker, Patrick; Kauserud, Håvard; Falk, Stefanie & Stordal, Frode
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Ozone stress on sub-Arctic tundra vegetation: ozone exposure experiments with daylength manipulation.
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Thorarinsdottir, Thordis Linda; Lenkoski, Alex; Hellton, Kristoffer Herland; Steinbakk, Gunnhildur Högnadóttir; Dyrrdal, Anita Verpe & Stordal, Frode
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(2018).
On developing general and efficient inference algorithms for complicated hierarchical models .
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Haugnes, Gunhild M.; Tallaksen, Lena M.; Vogt, Rolf David; Storelvmo, Trude; Hessen, Dag Olav & Stordal, Frode
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(2018).
Klimaforskerne tar temperaturen på tropesommeren.
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