Search Results - "Christensen, J H"

The relative importance of impacts from climate change vs. emissions change on air pollution levels in the 21st century by Hedegaard, G. B, Christensen, J. H, Brandt, J

“…So far several studies have analysed the impacts of climate change on future air pollution levels. Significant changes due to impacts of climate change have…”
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Seasonal characteristics of the relationship between daily precipitation intensity and surface temperature by Berg, P., Haerter, J. O., Thejll, P., Piani, C., Hagemann, S., Christensen, J. H.

“…Past studies have argued that the intensity of extreme precipitation events should increase exponentially with temperature. This argument is based on the…”
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Organosulfates and organic acids in Arctic aerosols: speciation, annual variation and concentration levels by Hansen, A. M. K, Kristensen, K, Nguyen, Q. T, Zare, A, Cozzi, F, Nøjgaard, J. K, Skov, H, Brandt, J, Christensen, J. H, Ström, J, Tunved, P, Krejci, R, Glasius, M

“…Sources, composition and occurrence of secondary organic aerosols in the Arctic were investigated at Zeppelin Mountain, Svalbard, and Station Nord,…”
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A multi-model study of impacts of climate change on surface ozone in Europe by Langner, J, Engardt, M, Baklanov, A, Christensen, J. H, Gauss, M, Geels, C, Hedegaard, G. B, Nuterman, R, Simpson, D, Soares, J, Sofiev, M, Wind, P, Zakey, A

“…The impact of climate change on surface ozone over Europe was studied using four offline regional chemistry transport models (CTMs) and one online regional…”
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Atmospheric black carbon and sulfate concentrations in Northeast Greenland by Massling, A, Nielsen, I. E, Kristensen, D, Christensen, J. H, Sørensen, L. L, Jensen, B, Nguyen, Q. T, Nøjgaard, J. K, Glasius, M, Skov, H

“…Measurements of equivalent black carbon (EBC) in aerosols at the high Arctic field site Villum Research Station (VRS) at Station Nord in North Greenland showed…”
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Current model capabilities for simulating black carbon and sulfate concentrations in the Arctic atmosphere: a multi-model evaluation using a comprehensive measurement data set by Eckhardt, S, Quennehen, B, Olivié, D. J. L, Berntsen, T. K, Cherian, R, Christensen, J. H, Collins, W, Crepinsek, S, Daskalakis, N, Flanner, M, Herber, A, Heyes, C, Hodnebrog, Ã, Huang, L, Kanakidou, M, Klimont, Z, Langner, J, Law, K. S, Lund, M. T, Mahmood, R, Massling, A, Myriokefalitakis, S, Nielsen, I. E, Nøjgaard, J. K, Quaas, J, Quinn, P. K, Raut, J.-C, Rumbold, S. T, Schulz, M, Sharma, S, Skeie, R. B, Skov, H, Uttal, T, von Salzen, K, Stohl, A

“…The concentrations of sulfate, black carbon (BC) and other aerosols in the Arctic are characterized by high values in late winter and spring (so-called Arctic…”
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An intercomparison of regional climate simulations for Europe: assessing uncertainties in model projections by Déqué, M., Rowell, D. P., Lüthi, D., Giorgi, F., Christensen, J. H., Rockel, B., Jacob, D., Kjellström, E., de Castro, M., van den Hurk, B.

“…Ten regional climate models (RCM) have been integrated with the standard forcings of the PRUDENCE experiment: IPCC-SRES A2 radiative forcing and Hadley Centre…”
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Contribution from the ten major emission sectors in Europe and Denmark to the health-cost externalities of air pollution using the EVA model system – an integrated modelling approach by Brandt, J, Silver, J. D, Christensen, J. H, Andersen, M. S, Bønløkke, J. H, Sigsgaard, T, Geels, C, Gross, A, Hansen, A. B, Hansen, K. M, Hedegaard, G. B, Kaas, E, Frohn, L. M

“…We have developed an integrated model system, EVA (Economic Valuation of Air pollution), based on the impact-pathway chain, to assess the health-related…”
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Understanding the anthropogenic influence on formation of biogenic secondary organic aerosols in Denmark via analysis of organosulfates and related oxidation products by Nguyen, Q. T, Christensen, M. K, Cozzi, F, Zare, A, Hansen, A. M. K, Kristensen, K, Tulinius, T. E, Madsen, H. H, Christensen, J. H, Brandt, J, Massling, A, Nøjgaard, J. K, Glasius, M

“…Anthropogenic emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) may affect concentration levels and composition of biogenic secondary organic…”
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Modelling the impact of climate change on the atmospheric transport and the fate of persistent organic pollutants in the Arctic by Hansen, K M, Christensen, J H, Geels, C, Silver, J D, Brandt, J

“…The Danish Eulerian Hemispheric Model (DEHM) was applied to investigate how projected climate changes will affect the atmospheric transport of 13 persistent…”
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A framework for testing the ability of models to project climate change and its impacts by Refsgaard, J. C., Madsen, H., Andréassian, V., Arnbjerg-Nielsen, K., Davidson, T. A., Drews, M., Hamilton, D. P., Jeppesen, E., Kjellström, E., Olesen, J. E., Sonnenborg, T. O., Trolle, D., Willems, P., Christensen, J. H.

“…Models used for climate change impact projections are typically not tested for simulation beyond current climate conditions. Since we have no data truly…”
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Fluorochemicals used in food packaging inhibit male sex hormone synthesis by Rosenmai, A.K., Nielsen, F.K., Pedersen, M., Hadrup, N., Trier, X., Christensen, J.H., Vinggaard, A.M.

“…Polyfluoroalkyl phosphate surfactants (PAPS) are widely used in food contact materials (FCMs) of paper and board and have recently been detected in 57% of…”
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Quantifying the contributions of natural emissions to ozone and total fine PM concentrations in the Northern Hemisphere by Zare, A, Christensen, J. H, Gross, A, Irannejad, P, Glasius, M, Brandt, J

“…Accurate estimates of emissions from natural sources are needed for reliable predictions of ozone and fine particulate matter (PM2.5) using air quality models…”
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Quantifying Energy and Mass Fluxes Controlling Godthåbsfjord Freshwater Input in a 5-km Simulation (1991–2012) by Langen, P. L., Mottram, R. H., Christensen, J. H., Boberg, F., Rodehacke, C. B., Stendel, M., van As, D., Ahlstrøm, A. P., Mortensen, J., Rysgaard, S., Petersen, D., Svendsen, K. H., Aðoalgeirsdóttir, G., Cappelen, J.

“…Freshwater runoff to fjords with marine-terminating glaciers along the Greenland Ice Sheet margin has an impact on fjord circulation and potentially ice sheet…”
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Assessment of past, present and future health-cost externalities of air pollution in Europe and the contribution from international ship traffic using the EVA model system by Brandt, J, Silver, J. D, Christensen, J. H, Andersen, M. S, Bønløkke, J. H, Sigsgaard, T, Geels, C, Gross, A, Hansen, A. B, Hansen, K. M, Hedegaard, G. B, Kaas, E, Frohn, L. M

“…An integrated model system, EVA (Economic Valuation of Air pollution), based on the impact-pathway chain has been developed to assess the health-related…”
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The Hsp60 folding machinery is crucial for manganese superoxide dismutase folding and function by Magnoni, R, Palmfeldt, J, Hansen, J, Christensen, J H, Corydon, T J, Bross, P

“…Even though the deleterious effects of increased reactive oxygen species (ROS) levels have been implicated in a variety of neurodegenerative disorders, the…”
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Results from a full coupling of the HIRHAM regional climate model and the MIKE SHE hydrological model for a Danish catchment by Larsen, M. A. D, Refsgaard, J. C, Drews, M, Butts, M. B, Jensen, K. H, Christensen, J. H, Christensen, O. B

“…A major challenge in the emerging research field of coupling of existing regional climate models (RCMs) and hydrology/land-surface models is the computational…”
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Evaluation of two isoprene emission models for use in a long-range air pollution model by Zare, A, Christensen, J. H, Irannejad, P, Brandt, J

“…Knowledge about isoprene emissions and concentration distribution is important for chemistry transport models (CTMs), because isoprene acts as a precursor for…”
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Assessment of robustness and significance of climate change signals for an ensemble of distribution-based scaled climate projections by Seaby, L.P., Refsgaard, J.C., Sonnenborg, T.O., Stisen, S., Christensen, J.H., Jensen, K.H.

“…► We analyse an ensemble of regional climate model projections for Denmark. ► We compare a delta change (DC) and a distribution-based (DBS) downscaling method…”
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Impact of global warming on permafrost conditions in a coupled GCM by Stendel, M., Christensen, J. H.

“…A climate change scenario experiment conducted with the state‐of‐the‐art coupled atmosphere‐ocean general circulation model ECHAM4/OPYC3 is analysed with the…”
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