Publications

On coarse patterns in the atmospheric concentration of ice nucleating particles

Conen, Franz; Yakutin, Mikhail V; Puchnin, Alexander; Yttri, Karl Espen

The atmospheric concentration of ice nucleating particles active at around −10 °C (INP−10) is very low. Nevertheless, these particles play a role in the development of cloud systems, so their spatial and temporal patterns merit attention. We collated available datasets on INP−10 to identify such patterns. Among the five low altitude observatories in northern Eurasia, median values throughout May to October were lowest in Scandinavia (4 and 6 m−3), somewhat higher in central Europe (11 m−3), substantially higher in the West Siberian Plain (69 m−3) and highest in the Central Yakutian Lowland (204 m−3), suggesting that the abundance of INP−10 in northern Eurasia may increase with continentality and from West to East. The range of values at the same observatories was narrower throughout November to April (2 to 27 m−3). On average, by an order of magnitude smaller values were reported for the four Arctic observatories. Consequently, increasing poleward transport of air masses from the midlatitudes likely raises the concentration of INP−10 in the Arctic, particularly when air masses had surface contact in eastern parts of northern Eurasia.

Elsevier

On persistent organic pollutants in Italy - From Seveso to the Stockholm Convention and beyond.

Katsoyiannis, A.; Cincinelli, A.

On the ability of CESM-WACCM to simulate frozen-in anticyclones in the spring/summer Arctic stratosphere. NILU F

Thieblemont, R.; Orsolini, Y.J.; Huret, N.

On the application, use and access to ground based aerosol observations (EBAS). NILU F

Myhre, C.L.

On the convergence and capability of large eddy simulation of passive plumes concentration fluctuations in an infinite-Re neutral boundary layer

Ardeshiri, Hamidreza; Cassiani, Massimo; Park, Soon-Young; Stohl, Andreas; Stebel, Kerstin; Pisso, Ignacio; Dinger, Anna Solvejg

On the coupling between polar and tropical regions during springtime: variability of tropical intrusion and Frozen In Anticyclones. Poster P-1108-04

Huret, N.; Thiéblemont, R.; Hauchecorne, A.; Orsolini, Y.J.; Matthes. K.

Abstract : Recent observational and modeling transport studies of Arctic stratospheric final warming have shown that tropical/subtropical air masses can be transported to high latitudes and remain confined within a long-lived ¿frozen- in¿ anticyclone (FriaC), embedded in the summer easterlies for several months. We first present a climatology of these sporadic events over the period 1960-2011 using era-40 and era interim reanalyses. this study highlights stratospheric favorable preconditioning for FrIACs occurrence, that is: i) early and abrupt final warming, ii) no stratospheric major warming during the previous winter, and iii) east phase of the Quasi-Biennial Oscillation. We will present in detail the FriaC in spring 2011, which was the largest ever recorded. Our climatology further suggests that the frequency of occurrence of FriaCs has increased over the last decade (among the nine cases detected over the period 1960- 2011, five occurred between 2002 and 2011). A chemistry climate model is then used for the first time to investigate FriaCs characteristics and variability. simulations were performed with the nCar¿s Community earth system Model (CesM, version 1.0.2), a coupled model system including the Whole Atmosphere Community Climate Model (WACCM). FrIACs characteristics (i.e. spatial extent and duration), are overall consistent by comparing with FriaCs detected era-40 meteorological reanalyses. Dynamical analysis reveals that FriaCs are associated with an abrupt and early winter-to-summer stratospheric circulation transition, characterized by an amplification of planetary wave activity. Furthermore, our model results confirm that FrIACs occur preferentially under the easterly phase of the QBO and in absence of MSW during the preceding

On the feasibility of monitoring carbon monxide in the lower troposphere from a constellation of Northern Hemisphere geostationary satellites. (Part 1).

Barre, J.; Edwards, D.; Worden, H.; Da Silva, A.; Lahoz, W.

On the job training and auditing of the Air Quality Monitoring Network in South Durban. NILU OR

Dreiem, R.

On the long-term stability of satellite and ground-based ozone profile records.

Hubert, D.; Lambert, J.-C.; Verhoelst, T.; Keppens, A.; Granville, J.; Bhartia, P. K.; Bourassa, A. E.; Damadeo, R. P.; Degenstein, D. A.; Froidevaux, L.; Godin-Beekmann, S.; Johnson, B.; Kaempfer, N.; Leblanc, T.; Lichtenberg, G.; Murtagh, D. P.; Maillard-Barras, E.; Nakane, H.; Nedoluha, G. E.; Portafaix, T.; Querel, R.; Raspolinie, P.; Russell, J. M.; Salvador, J.; Smit, H. G.; Sofieva, V.; Stebel, K.; Steinbrecht, W.; Stubi, R.; Swart, D. P. J.; Tarasick, D. W.; Thompson, A. M.; Van Malderen, R.; von Clarmann, T.; von der Gathen, P.; Walker, K. A.; Weber, M.; Witte, J. C.; Wolfram, E.; Zawodny, J. M.

On the origin of continental precipitation.

Gimeno, L.; Drumond, A. Nieto, R.; Trigo, R.M.; Stohl, A.

On the potential impact of the stratosphere upon seasonal dynamical hindcasts of the North Atlantic Oscillation: a pilot study.

Orsolini, Y.J.; Kindem, I.T.; Kvamstø, N.G.

On the Sea Ice Loss over the Bering-Chukchi Sea and Sudden Stratospheric Warmings during the Easterly Phase of the Quasi-Biennial Oscillation

Zhang, Jiarong; Orsolini, Yvan J.; Limpasuvan, Varavut