Manioc : Portail | resultats 1 - 20 pour la recherche: Mestier, T.

Éditeur(s) : Taylor & Francis Ltd
Résumé : A new method is developed to estimate daily turbulent airsea fluxes over the global ocean on a 0.25 degrees grid. The required surface wind speed (w(10)) and specific air humidity (q(10)) at 10m height are both estimated from remotely sensed measurements. w(10) is obtained from the SeaWinds scatterometer on board the QuikSCAT satellite. A new empirical model relating brightness temperatures (T-b) from the Special Sensor Microwave Imager (SSM/I) and q(10) is developed. It is an extension of the author's previous q(10) model. In addition to T-b, the empirical model includes sea surface temperature (SST) and airsea temperature difference data. The calibration of the new empirical q(10) model utilizes q(10) from the latest version of the National Oceanography Centre airsea interaction gridded data set (NOCS2.0). Compared with mooring data, the new satellite q(10) exhibits better statistical results than previous estimates. For instance, the bias, the root mean square (RMS), and the correlation coefficient values estimated from comparisons between satellite and moorings in the northeast Atlantic and the Mediterranean Sea are 0.04gkg(1), 0.87gkg(1), and 0.95, respectively. The new satellite q(10) is used in combination with the newly reprocessed QuikSCAT V3, the latest version of SST analyses provided by the National Climatic Data Center (NCDC), and 10m air temperature estimated from the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses (ERA-Interim), to determine three daily gridded turbulent quantities at 0.25 degrees spatial resolution: surface wind stress, latent heat flux (LHF), and sensible heat flux (SHF). Validation of the resulting fields is performed through a comprehensive comparison with daily, in situ values of LHF and SHF from buoys. In the northeast Atlantic basin, the satellite-derived daily LHF has bias, RMS, and correlation of 5Wm(2), 27Wm(2), and 0.89, respectively. For SHF, the statistical parameters are 2Wm(2), 10Wm(2), and 0.94, respectively. At global scale, the new satellite LHF and SHF are compared to NOCS2.0 daily estimates. Both daily fluxes exhibit similar spatial and seasonal variability. The main departures are found at latitudes south of 40 degrees S, where satellite latent and sensible heat fluxes are generally larger.
International Journal Of Remote Sensing (0143-1161) (Taylor & Francis Ltd), 2013-07 , Vol. 34 , N. 14 , P. 5243-5261

Droits : 2013 Taylor & Francis
http://archimer.ifremer.fr/doc/00137/24825/23575.pdf
DOI:10.1080/01431161.2013.787502
http://archimer.ifremer.fr/doc/00137/24825/

| Plus

Découverte par mer des bouches du Mississipi et établissements de Lemoyne d'Iberville sur le Golfe du Mexique (1694-1703)
Auteur(s) : Margry, Pierre (1818-1894)
Année de publication :

| Plus

E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler
Auteur(s) : Lund, Peter Wilhelm (1801-1880)
Année de publication :

| Plus

Histoire générale des isles de S. Christophe, de la Guadeloupe, de la Martinique, et autres dans l'Amérique : où l'on verra l'establissement des colonies françoises, dans ces isles, leurs guerres civiles & estrangeres, & tout ce qui se passe dans les voyages & retours des Indes : comme aussi plusieurs belles particularitez des Antisles de l'Amerique: une description generale de l'isle de la Guadeloupe: de tous ses mineraux, de ses pierreries, de ses rivieres, fontaines & estangs: & de toutes ses plantes. De plus, la description de tous les animaux de la mer, de l'air, & de la terre: & un traité fort ample des m?urs des sauvages du pays, de l'estat de la colonie françoise, & des esclaves, tant mores, que sauvages
Auteur(s) : Du Tertre, Jean-Baptiste (1610-1687)
Année de publication :

| Plus