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Tougne, J.; Paty, B.; Meynard, D.; Martin, J.-M.; Letellier, T.; Rosnet, E. (2008). Group Problem Solving and Anxiety During a Simulated Mountaineering Ascent. Environment and behavior, 40(1), 3–23.
Abstract: Eight mountaineers were placed in a hypobaric chamber to simulate oxygen depletion accompanying a mountain ascent. The aim was to examine the evolution of individual and group efficiency in problem solving and anxiety according to simulated altitude. Relationships within the group, state and trait anxiety, and individual and collective performance in problem solving were repeatedly assessed at simulated altitudes of 5000m, 6000m, 7000m, and 8000m. The decrease of individual performance in problem solving, shown to be simultaneous to the increase of state anxiety, had little effect on collective performance in problem solving. These results suggest (a) that the collective success could be due to the emergence of a positive common goal and a positive appraisal of the situation and (b) that the state anxiety could act as a mediator between the variation in altitude and its effects on individual performance. The relevance of these results to real mountaineering expeditions is discussed.
Programme: 374;901
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. (2005). Ionospheric signatures of plasma injections in the cusp triggered by solar wind pressure pulses. J. Geophys. Res., 110.
Keywords: flux transfer events; cusp; reconnection; flow bursts; solar wind pressure; 2463 Ionosphere: Plasma convection; 2712 Magnetospheric Physics: Electric fields; 2716 Magnetospheric Physics: Energetic particles: precipitating; 2736 Magnetospheric Physics: Magnetosphere/ionosphere interactions; 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions
Programme: 312;911
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Genthon, C.; Kaspari, S.; Mayewski, P. (2005). Climate dynamics, 24(7), 759–770.
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Krinner, G.; Magand, O.; Simmonds, I.; Genthon, C.; Dufresne, J. (2007). Simulated Antarctic precipitation and surface mass balance at the end of the twentieth and twenty-first centuries. Climate dynamics, 28(2), 215–230.
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Masson-Delmotte, V.; Dreyfus, G.; Braconnot, P.; Johnsen, S.; Jouzel, J.; Kageyama, M.; Landais, A.; Loutre, M.-F.; Nouet, J.; Parrenin, F.; Raynaud, D.; Stenni, B.; Tuenter, E. (2006). Past temperature reconstructions from deep ice cores: relevance for future climate change. Climate of the past, 2(2), 145–165.
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Meijer, Y.J.; Swart, D.P.J.; Allaart, M.; Andersen, S.B.; Bodeker, G.; Boyd, I.; Braathen, G.; Calisesi, Y.; Claude, H.; Dorokhov, V.; von der Gathen, P.; Gil, M.; Godin-Beekmann, S.; Goutail, F.; Hansen, G.; Karpetchko, A.; Keckhut, P.; Kelder, H.M.; Koelemeijer, R.; Kois, B.; Koopman, R.M.; Kopp, G.; Lambert, J.-C.; Leblanc, T.; McDermid, I.S.; Pal, S.; Schets, H.; Stubi, R.; Suortti, T.; Visconti, G.; Yela, M. (2004). Pole-to-pole validation of Envisat GOMOS ozone profiles using data from ground-based and balloon sonde measurements. J. Geophys. Res., 109.
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Bouhram, M.; Dubouloz, N.; Malingre, M.; Jasperse, J.R.; Pottelette, R.; Senior, C.; Delcourt, D.; Carlson, C.W.; Roth, I.; Berthomier, M.; Sauvaud, J.-A. (2002). Ion outflow and associated perpendicular heating in the cusp observed by Interball Auroral Probe and Fast Auroral Snapshot. J. Geophys. Res., 107.
Keywords: 2704 Magnetospheric Physics: Auroral phenomena; 2724 Magnetospheric Physics: Magnetopause, cusp, and boundary layers; 7859 Space Plasma Physics: Transport processes; 7867 Space Plasma Physics: Wave/particle interactions
Programme: 312
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Tomasi, C.; Petkov, B.; Benedetti, E.; Vitale, V.; Pellegrini, A.; Dargaud, G.; De Silvestri, L.; Grigioni, P.; Fossat, E.; Roth, W.L.; Valenziano, L. (2006). Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months. J. Geophys. Res., 111.
Keywords: radiosounding measurements; precipitable water; Antarctic atmosphere; 3349 Atmospheric Processes: Polar meteorology; 1655 Global Change: Water cycles; 0365 Atmospheric Composition and Structure: Troposphere: composition and chemistry; 7539 Solar Physics, Astrophysics, and Astronomy: Stellar astronomy
Programme: 908
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Udisti, R.; Becagli, S.; Castellano, E.; Delmonte, B.; Jouzel, J.; Petit, J.R.; Schwander, J.; Stenni, B.; Wolff, E.W. (2004). Stratigraphic correlations between the European Project for Ice Coring in Antarctica (EPICA) Dome C and Vostok ice cores showing the relative variations of snow accumulation over the past 45 kyr. J. Geophys. Res., 109.
Abstract: High-resolution chemistry analysis and electrical measurements performed on two ice core records (European Project for Ice Coring in Antarctica (EPICA) Dome C and Vostok) spanning the last 45 kyr allow stratigraphic correlations by matching volcanic events. Several common events were identified along the two ice cores on the basis of acidity and sulphate spikes in snow layers. Timescales were matched through comparison with isotope (?D) profiles and using the Antarctic cold reversal (ACR) minimum, a 10Be peak, and a dust spike as temporal checkpoints. Ratios of relative snow accumulation at the two sites during the Holocene, in the glacial-interglacial transition and in the last part of the glacial period, were reconstructed by finding the best fit between Dome C and Vostok depths recording the same events. After accounting for thinning of the layers as they are buried within the glacier, the Dome C-Vostok accumulation ratio, expected to be roughly constant from the conventional accumulation-temperature-isotope approach, is 1.12 for the glacial period but increases to as much as 1.44 for a large part of the Holocene. Glaciological effects, mainly related to the geographic origin of the Vostok ice along the Ridge B-Vostok axis, can account for only a minor fraction of this change. Instead, we argue that accumulation variability between the cores stems from differential changes in atmospheric circulation during these respective climatic periods at the two sites. Regional changes in atmospheric circulation are proposed with a negative anomaly in Dome C, a positive accumulation anomaly in Vostok, or a combination of both during glacial climate. Our approach may help to improve ice core dating by: (1) revealing anomalies in accumulation-rate estimation based on the classical thermodynamic method and (2) supporting the necessity to take into account contributions due to changes in atmospheric circulation processes.
Keywords: 0325 Atmospheric Composition and Structure: Evolution of the atmosphere; 1620 Global Change: Climate dynamics; 1863 Hydrology: Snow and ice; 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology; 9310 Information Related to Geographic Region: Antarctica
Programme: 960
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Marchand, M.; Bekki, S.; Denis, L.; Pommereau, J.-P.; Khattatov, B.V. (2003). Test of the night-time polar stratospheric NO2 decay using wintertime SAOZ measurements and chemical data assimilation. Geophysical research letters, 30.
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