Resultados de Búsqueda por Autor

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artículo

Publicado por
Smith, N., Kessler, W.S., Cravatte, S., Sprintall, J., Wijffels, S., Cronin, M.F., Sutton, A., Serra, Y.L., Dewitte, Boris, Strutton, P.G., Hill, K., Gupta, A.S., Lin, Xiaopei, Takahashi, Ken, Chen, D., Brunner, Shelby

Publicado 2019

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This paper reviews the design of the Tropical Pacific Observing System (TPOS) and its governance and takes a forward look at prospective change. The initial findings of the TPOS 2020 Project embrace new strategic approaches and technologies in a user-driven design and the variable focus of the Framework for Ocean Observing. User requirements arise from climate prediction and research, climate change and the climate record, and coupled modeling and data assimilation more generally. Requirements include focus on the upper ocean and air-sea interactions, sampling of diurnal variations, finer spatial scales and emerging demands related to biogeochemistry and ecosystems. One aim is to sample a diversity of climatic regimes in addition to the equatorial zone. The status and outlook for meeting the requirements of the design are discussed. This is accomplished through integrated and complementa...

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artículo

Pluto's Atmosphere from the 2015 June 29 Ground-based Stellar Occultation at the Time of the New Horizons Flyby

Publicado por
Sicardy, B., Talbot, J., Meza, E., Camargo, J. I. B., Desmars, J., Gault, D., Herald, D., Kerr, S., Pavlov, H., Braga-Ribas, F., Assafin, M., Benedetti-Rossi, G., Dias-Oliveira, A., Gomes-Junior, A. R., Vieira-Martins, R., Berard, D., Kervella, P., Lecacheux, J., Lellouch, E., Beisker, W., Dunham, D., Jelinek, M., Duffard, R., Ortiz, J. L., Castro-Tirado, A. J., Cunniffe, R., Querel, R., Yock, P. C., Cole, A. A., Giles, A. B., Hill, K. M., Beaulieu, J. P., Harnisch, M., Jansen, R., Pennell, A., Todd, S., Allen, W. H., Graham, P. B., Loader, B., McKay, G., Milner, J., Parker, S., Barry, M. A., Bradshaw, J., Broughton, J., Davis, L., Devillepoix, H., Drummond, J., Field, L., Forbes, M., Giles, D., Glassey, R., Groom, R., Hooper, D., Horvat, R., Hudson, G., Idaczyk, R., Jenke, D., Lade, B., Newman, J., Nosworthy, P., Purcell, P., Skilton, P. F., Streamer, M., Unwin, M., Watanabe, H., White, G. L., Watson, D.

Publicado 2016

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We present results from a multi-chord Pluto stellar occultation observed on 2015 June 29 from New Zealand and Australia. This occurred only two weeks before the NASA New Horizons flyby of the Pluto system and serves as a useful comparison between ground-based and space results. We find that Pluto's atmosphere is still expanding, with a significant pressure increase of 5 +/- 2% since 2013 and a factor of almost three since 1988. This trend rules out, as of today, an atmospheric collapse associated with Pluto's recession from the Sun. A central flash, a rare occurrence, was observed from several sites in New Zealand. The flash shape and amplitude are compatible with a spherical and transparent atmospheric layer of roughly 3 km in thickness whose base lies at about 4 km above Pluto's surface, and where an average thermal gradient of about 5 K km(-1) prevails. We discuss the possibility that...

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artículo

The Structure of Chariklo's Rings from Stellar Occultations

Publicado por
Bérard D., Sicardy B., Camargo J.I.B., Desmars J., Braga-Ribas F., Ortiz J.-L., Duffard R., Morales N., Meza E., Leiva R., Benedetti-Rossi G., Vieira-Martins R., Jnior A.-R.G., Assafin M., Colas F., Dauvergne J.-L., Kervella P., Lecacheux J., Maquet L., Vachier F., Renner S., Monard B., Sickafoose A.A., Breytenbach H., Genade A., Beisker W., Bath K.-L., Bode H.-J., Backes M., Ivanov V.D., Jehin E., Gillon M., Manfroid J., Pollock J., Tancredi G., Roland S., Salvo R., Vanzi L., Herald D., Gault D., Kerr S., Pavlov H., Hill K.M., Bradshaw J., Barry M.A., Cool A., Lade B., Cole A., Broughton J., Newman J., Horvat R., Maybour D., Giles D., Davis L., Paton R.A., Loader B., Pennell A., Jaquiery P.-D., Brillant S., Selman F., Dumas C., Herrera C., Carraro G., Monaco L., Maury A., Peyrot A., Teng-Chuen-Yu J.-P., Richichi A., Irawati P., Witt C.D., Schoenau P., Prager R., Colazo C., Melia R., Spagnotto J., Blain A., Alonso S., Román A., Santos-Sanz P., Rizos J.-L., Maestre J.-L., Dunham D.

Publicado 2017

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acknowledges support from the Contrato de subvención 205–2014 Fondecyt—Concytec, Perú.