Publikasjoner

Relationships between organohalogen contaminants and blood plasma clinical-chemical parameters in chicks of three raptor species from Northern Norway.

Sonne, C.; Bustnes, J.O.; Herzke, D.; Jaspers, V.L.B.; Covavi, A.; Halley, D.J.; Moum, T.; Eulaers, I.; Eens, M.; Ims, R.A.; Hanssen, S.A.; Erikstad, K.E.; Johnsen, T.; Schnug, L.; Riget, F.R.; Jensen, A.L.

Relationships between thyroid hormones and organohalogenated contaminants in White-tailed eagle nestlings

Løseth, Mari Engvig; Eggen, Grethe Stavik; Briels, Nathalie; Nygård, Torgeir; Johnsen, Trond Vidar; Bustnes, Jan Ove; Herzke, Dorte; Poma, Giulia; Malarvannan, Govindan; Covaci, Adrian; Jenssen, Bjørn Munro; Jaspers, Veerle

Relative Impacts of Sea Ice Loss and Atmospheric Internal Variability on the Winter Arctic to East Asian Surface Air Temperature Based on Large-Ensemble Simulations with NorESM2

He, Shengping; Drange, Helge; Furevik, Tore; Wang, Hui-Jun; Fan, Ke; Graff, Lise Seland; Orsolini, Yvan Joseph Georges Emile G.

To quantify the relative contributions of Arctic sea ice and unforced atmospheric internal variability to the “warm Arctic, cold East Asia” (WACE) teleconnection, this study analyses three sets of large-ensemble simulations carried out by the Norwegian Earth System Model with a coupled atmosphere–land surface model, forced by seasonal sea ice conditions from preindustrial, present-day, and future periods. Each ensemble member within the same set uses the same forcing but with small perturbations to the atmospheric initial state. Hence, the difference between the present-day (or future) ensemble mean and the preindustrial ensemble mean provides the ice-loss-induced response, while the difference of the individual members within the present-day (or future) set is the effect of atmospheric internal variability. Results indicate that both present-day and future sea ice loss can force a negative phase of the Arctic Oscillation with a WACE pattern in winter. The magnitude of ice-induced Arctic warming is over four (ten) times larger than the ice-induced East Asian cooling in the present-day (future) experiment; the latter having a magnitude that is about 30% of the observed cooling. Sea ice loss contributes about 60% (80%) to the Arctic winter warming in the present-day (future) experiment. Atmospheric internal variability can also induce a WACE pattern with comparable magnitudes between the Arctic and East Asia. Ice-loss-induced East Asian cooling can easily be masked by atmospheric internal variability effects because random atmospheric internal variability may induce a larger magnitude warming. The observed WACE pattern occurs as a result of both Arctic sea ice loss and atmospheric internal variability, with the former dominating Arctic warming and the latter dominating East Asian cooling.

Relative rate coefficients of OH radical reactions and Ozone Depletion Potential estimate for CF3CF=CClCF3.

Aranguren Abrate, J.P.; Pisso, I.; Peirone, S.A.; Cometto, P.M.; Lane, S.I.

Relevance of 1,2,5,6,9,10-hexabromocyclododecane diastereomer structure on partitioning properties, column-retention and clean-up procedures.

Mariussen, E.; Haukås, M.; Arp, H.P.H.; Goss, K.U.; Borgen, A.; Sandanger, T.M.

Remote sensing and inverse transport modeling of the Kasatochi eruption sulfur dioxide cloud.

Kristiansen, N.; Stohl, A.; Prata, F.; Rischter, A.; Eckhard, S.; Seibert, P.; Hoffmann, A.; Ritter, C.; Bitar, L.; Duck, T.J.; Stebel, K.

Remote sensing of aerosols in the Arctic for an evaluation of global climate model simulations.

Glantz, P.; Bourassa, A.; Herber, A.; Iversen, T.; Karlsson, J.; Kirkevåg, A.; Maturilli, M.; Seland, Ø.; Stebel, K.; Struthers, H.; Tesche, M.; Thomason, L.

Remote sensing of volcanic ash with the IASI iinterferometer on board the METOP satellite.

Clarisse, L.; Prata, F.; Hurtsmans, D.; Coheur, P.; Clerbaux, C.

Remote sensing of volcanic SO2 emissions using UV camera systems.

Gliss, J.; Stebel, K.; Kylling, A.; Sudbø, A.

Remote sources of water vapor forming precipitation on the Norwegian west coast at 60°N - a tale of hurricanes and an atmospheric river.

Stohl, A.; Forster, C.; Sodemann, H.

Remote sources of water vapor forming precipitation on the Norwegian west coast at 60°N - a tale of hurricanes and an atmospheric river.

Stohl, A.; Forster, C.; Sodemann, H.

Removal Processes of the Stratospheric SO2 Volcanic Plume From the 2015 Calbuco Eruption

Baray, J.‐L.; Gheusi, F.; Duflot, Valentin; Tulet, P.

Abstract We analyze the volcanic plume from the April 2015 Calbuco eruption over a 35‐day period using simulations from Meso‐NH, a non‐hydrostatic mesoscale atmospheric model. A dedicated parameterization of the deep injection of the plume into the stratosphere ensures a realistic representation when compared to Infrared Atmospheric Sounding Interferometer satellite observations. During the first 12 hr of the eruption, on 22 April 2015, SO 2 mixing ratio reached 29 ppmv between 15 and 18 km for the first eruption pulse, and 38 ppmv between 12 and 16 km for the second. Most SO 2 was injected directly into the stratosphere, with a stratospheric load reaching 308 ktS (kilotons of atomic sulfur, i.e. 616 kilotons of SO 2 ) after the eruption. After 1 month, both stratospheric and tropospheric SO 2 loads returned to near‐background levels. During analysis, the chemical conversion of SO 2 into H 2 SO 4 removed a part of SO 2 from the stratosphere. During the long‐range advection, the co‐location between the subtropical jet stream and the Calbuco plume led to three significant stratospheric intrusions on 24, 26 and 28 April 2015. These events transferred stratospheric SO 2 into the troposphere, SO 2 mixing ratios in the upper troposphere reaching 15 ppmv, 26 and 15 ppbv, respectively. SO 2 is gradually oxidized into H 2 SO 4 , with up to 5 ktS of gaseous H 2 SO 4 in the stratosphere on 30 April, but dynamical processes dominate the SO 2 atmospheric budget over chemical transformations. This study demonstrates that stratospheric intrusions can play a critical role in the removal of volcanic material from the stratosphere following a major eruption.