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9 results on '"Sandel, B."'

1. Author Correction: The loss of ions from Venus through the plasma wake

Author

Barabash, S, Fedorov, A, Sauvaud, J J, Lundin, R, Russell, C T, Futaana, Y, Zhang, T L, Andersson, H, Brinkfeldt, K, Grigoriev, A, Holmström, M, Yamauchi, M, Asamura, K, Baumjohann, W, Lammer, H, Coates, A J, Kataria, D O, Linder, D R, Curtis, C C, Hsieh, K C, Sandel, B R, Grande, M, Gunell, H, Koskinen, H E J, Kallio, E, Riihelä, P, Säles, T, Schmidt, W, Kozyra, J, Krupp, N, Fränz, M, Woch, J, Luhmann, J, McKenna-Lawlor, S, Mazelle, C, Thocaven, J-J, Orsini, S, Cerulli-Irelli, R, Mura, A, Milillo, A, Maggi, M, Roelof, E, Brandt, P, Szego, K, Winningham, J D, Frahm, R A, Scherrer, J, Sharber, J R, Wurz, P, and Bochsler, P

Subjects
Multidisciplinary, 530 Physik
Published
2022

2. Voyager 1/UVS Lyman $��$ measurements at the distant heliosphere (90-130AU): unknown source of additional emission

Author

Katushkina, O. A., Quemerais, E., Izmodenov, V. V., Lallement, R., and Sandel, B. R.

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Physics::Space Physics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

In this work, we present for the first time the Lyman $��$ intensities measured by Voyager 1/UVS in 2003-2014 (at 90-130 AU from the Sun). During this period Voyager 1 measured the Lyman $��$ emission in the outer heliosphere at an almost fixed direction close to the upwind (that is towards the interstellar flow). The data show an unexpected behavior in 2003-2009: the ratio of observed intensity to the solar Lyman $��$ flux is almost constant. Numerical modelling of these data is performed in the frame of a state-of-art self-consistent kinetic-MHD model of the heliospheric interface (Izmodenov & Alexashov, 2015). The model results, for various interstellar parameters, predict a monotonic decrease of intensity not seen in the data. We propose two possible scenarios that explain the data qualitatively. The first is the formation of a dense layer of hydrogen atoms near the heliopause. Such a layer would provide an additional backscattered Doppler shifted Lyman $��$ emission, which is not absorbed inside the heliosphere and may be observed by Voyager. About 35 R of intensity from the layer is needed. The second scenario is an external non-heliospheric Lyman $��$ component, which could be galactic or extragalactic. Our parametric study shows that $\sim$25 R of additional emission leads to a good qualitative agreement between the Voyager 1 data and the model results., accepted in Journal of Geophysical Research: Space Physics

Published
2017
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3. Science Rationale for an IO Volcano Observer (IVO) Mission

Author

McEwen, A., Turtle, E., Keszthelyi, L., Spencer, J., Thomas, N., Wurz, P., Christensen, P., Khurana, K., Glassmeier, K.-H., Auster, U., Furfaro, R., Davies, A., Nimmo, F., Moses, J., Bagenal, F., Kirk, R., Wieser, M., Barabash, S., Paranicus, C., Lorenz, R., Anderson, B., Showman, A., and Sandel, B.

Subjects
520 Astronomy, 620 Engineering
Published
2010
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4. Spicam: Spectroscopy for the investigation of the characteristics of the atmosphere of Mars

Author

Bertaux, J. -L, Korablev, O., Fonteyn, D., Perrier, S., Fedorova, A., Montmessin, F., Leblanc, F., Lebonnois, S., Lefèvre, F., Quémerais, E., pascal RANNOU, Chaurray, J. Y., Forget, F., Sandel, B., Stern, A., Müller, C., Dimarellis, E., Dubois, J. P., Guibert, S., Souchon, G., Leclère, M., Semelin, F., Reberac, A., Barthelemy, M., Lebrun, J. C., Taulemesse, C., Ransbeeck, E., Gondet, B., Kiselev, A., Rodin, A., Stepanov, A., Kalinnikov, Yu, Grigoriev, A., Hauchecorne, A., Cabane, M., Chassefière, E., Cernogora, G., Levasseur-Regourd, A. C., Maziere, M., Neefs, E., Simon, P. C., Fussen, D., Nevejans, D., Arijs, E., Hourdin, F., Talagrand, O., Witasse, O., Kyrölä, E., and Tamminen, J.

5. Plasmaspheric plumes: CLUSTER, IMAGE and simulations

Author

Darrouzet, F., Keyser, J., Décréau, P. M. E., Gallagher, D. L., Pierrard, V., Lemaire, J. F., Sandel, B. R., Iannis Dandouras, Matsui, H., Dunlop, M., Cabrera, J., Masson, A., Canu, P., Trotignon, J. G., Rauch, J. L., and André, M.

7. Responses of global waterbird populations to climate change vary with latitude

Author

Amano, T, Székely, T, Wauchope, HS, Sandel, B, Nagy, S, Mundkur, T, Langendoen, T, Blanco, D, Michel, NL, and Sutherland, WJ

Subjects
13 Climate Action, 13. Climate action, 3103 Ecology, 15 Life on Land, 4101 Climate Change Impacts and Adaptation, 4102 Ecological Applications, sense organs, 15. Life on land, 41 Environmental Sciences, skin and connective tissue diseases, 31 Biological Sciences
Abstract

While climate change continues to present a major threat to global biodiversity and ecosystems, most research on climate change impacts do not have the resolution to detect changes in species abundance and are often limited to temperate ecosystems. This limits our understanding of global responses in species abundance—a determinant of ecosystem function and services—to climate change including in the highly-biodiverse tropics. We address this knowledge gap by quantifying abundance responses to climate change in waterbirds, an indicator taxon of wetland biodiversity, at 6,822 sites between −55° and 64°. Using 1,303,651 count records since 1990 of 390 species, we show that with temperature increase, the abundance of species and populations decreased at lower latitudes, particularly in the tropics, but increased at higher latitudes. These contrasting responses to temperature increase according to latitude indicate potential global-scale poleward shifts of species abundance under climate change, providing empirical support for predictions by earlier studies. The negative responses to temperature increase in tropical species and populations are of conservation concern, as they are often also threatened by other anthropogenic factors. Our results suggest that existing biases in studies towards temperate regions could underestimate the impact of climate change on waterbirds and other species.

8. ASPERA-3: Analyser of space plasmas and energetic ions for mars express

Author

Barabash, S., Lundin, R., Andersson, H., Gimholt, J., Holmström, M., Norberg, O., Yamauchi, M., Asamura, K., Coates, A. J., Linder, D. R., Kataria, D. O., Curtis, C. C., Hsieh, K. C., Sandel, B. R., Fedorov, A., Grigoriev, A., Budnik, E., Grande, M., Carter, M., Reading, D. H., Koskinen, H., Esa Kallio, Riihela, P., Säles, T., Kozyra, J., Krupp, N., Livi, S., Woch, J., Luhmann, J., Mckenna-Lawlor, S., Orsini, S., Cerulli-Irelli, R., Maggi, M., Morbidini, A., Mura, A., Milillo, A., Roelof, E., Williams, D., Sauvaud, J. -A, Thocaven, J. -J, Moreau, T., Winningham, D., Frahm, R., Scherrer, J., Sharber, J., Wurz, P., and Bochsler, P.

9. Aspera-3: Analyser of space plasmas and energetic neutral atoms

Author

Lundin, R., Barabash, S., Holmström, M., Andersson, H., Yamauchi, M., Nilsson, H., Grigorev, A., Winningham, D., Frahm, R., Sharber, J. R., Sauvaud, J. -A, Fedorov, A., Budnik, E., Thocaven, J. -J, Asamura, K., Hayakawa, H., Coates, A. J., Soobiah, Y., Linder, D. R., Kataria, D. O., Curtis, C., Hsieh, K. C., Sandel, B. R., Manuel Grande, Carter, M., Reading, D. H., Koskinen, H., Kallio, E., Riihela, P., Sales, T., Kozyra, J., Krupp, N., Woch, J., Fraenz, M., Luhmann, J., Brain, D., Mckenna-Lawler, S., Cerulli-Irelli, R., Orsini, S., Maggi, M., Milillo, A., Roelof, E., Livi, S., Brandt, P., Wurz, P., Bochsler, P., and Galli, A.

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