We have used ozone and radiosonde profile data from strategically designed networks (IONS-04, IONS-06; SHADOZ) for better interpretation of atmospheric chemistry and dynamics in the tropics, ...sub-tropics and mid- latitudes and in critical regions: the urban boundary layer, at the tropopause, free troposphere and at urban-non- urban interfaces. A consistent finding from mega-city regions is how variable ozone is throughout boundary layer and free troposphere - within individual soundings and at a given site over a 3-4 -week campaign. The variability is due to complex interactions between meteorological and chemical factors and between natural and anthropogenic contributions to the ozone budget. Stratospheric influences and lightning influences in the free troposphere are robust. The variability is illustrated by Mexico City ozone soundings trajectories and tracers during INTEX-B (Intercontinental Transport Experiment - 2006) and Milagro/MIRAGE-Mex (Megacity Impacts of Regional and Global Environments) and by Houston, Hunstville, suburban Washington DC (Beltsville, Maryland) and Narragansett in IONS-04 and IONS-06. Trans-boundary pollution within mega-cities (eg. Washington to Boston corridor, Mexico City), is mediated by phenomena like the low-level jet and terrain impacts. Images of the soundings and meteorological information for IONS are at http:croc.gsfc.nasa.gov/intex/ions; http:croc.gsfc.nasa.gov/intexb/ions06.
Évolution des sources du volcanisme marocain au cours du Néogène El Azzouzi, M'hammed; Bernard-Griffiths, Jean; Bellon, Hervé ...
Comptes rendus de l'Académie des sciences. Série II. Fascicule a, Sciences de la terre et des planètes,
7/1999, Letnik:
329, Številka:
2
Journal Article
New major and trace element analyses, Sr-Nd isotopic data and
40K-
40Ar ages on Neogene and Quaternary lavas from Morocco lead to the conclusion that the observed temporal changes from calc-alkaline ...to transitional and finally alkaline magmatic activity reflect the contributions of distinct sources. According to our model, magmas originally derived from the melting of an European/Western Mediterranean-type asthenospheric mantle source interact during their ascent with either a subcontinental Ronda — Beni Bousera —/type lithospheric mantle (alkaline magmas) or a lithospheric mantle containing a crustal component, and the overlying continental crust (calcalkaline and, to a lesser extent, transitional magmas).
Des données nouvelles (éléments majeurs et en traces, isotopes du Sr et Nd, âges
40K-
40Ar) sur les laves néogènes et quaternaires du Maroc permettent de montrer que le passage observé des lavescalco-alcalines à des laves transitionnelles puis alcalines reflète les contributions successives de plusieurs types de sources. Les magmas étudiés seraient issus d'une source mantellique asthénosphérique de type européen/ouest-méditerranéen. Leur évolution au cours du temps semblerait avoir été conditionnée, soit par des processus de rééquilibration avec un manteau lithosphérique sous-continental de type Ronda-Beni Bousera lors de leur ascension, aboutissant aux magmas alcalins, soit par leur interaction avec un manteau lithosphérique contenant un composant crustal, puis avec la croûte continentale, cette évolution plus complexe conduisant aux magmas calco-alcalins, ou bien, lorsque l'empreinte crustale décroît, aux magmas transitionnels.
Provider: - Institution: - Data provided by Europeana Collections- Avec mode texte- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal ...Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Avec mode texte- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal ...Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
La formation des enseignants I Ayala de la Peña, Amalia; Fields, Marjorie; Gartenschläger, Rainer ...
Revue internationale d'éducation de Sèvres,
1998
Journal Article
MEXICO TROPICALE / Pépé JARAMILLO con y su Ritmos Velasquez, Consuelo (1916-2005). Auteur ou responsable intellectuel; Roig, Gonzalo. Auteur ou responsable intellectuel; Porter, Cole (1892-1964). Auteur ou responsable intellectuel ...
1959
Audio Recording
Provider: - Institution: - Data provided by Europeana Collections- Titre uniforme : Besame mucho- Titre uniforme : J'attendrai- Titre uniforme : Angelitos negros- Titre uniforme : Les feuilles ...mortes- Titre uniforme : El Cumbanchero- Titre uniforme : Perfidia- Titre uniforme : Frenesi- Comprend : EL CUMBANCHERO / HERNANDEZ - BRAZIL / BARROSO - BEGIN THE BEGUINE / PORTER - LEARNING THE CHA CHA - PERFIDIA / DOMINGUEZ - I'VE GOT YOU UNDER MY SKIN / PORTER - J'ATTENDRAI / OLIVIERI - YOURS / ROIG - FRENESI / DOMINGUEZ - ANGELITOS NEGROS / MACISTE - JARDINEIRA / LACERDA - AUTUMN LEAVES / J. KOSMA - NICOLASA / BRILO - BESAME MUCHO / VELASQUEZ- BnF-Partenariats, Collection sonore - Believe- Contient une table des matières- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
PDF
