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Registros recuperados: 584
Primeira ... 222324252627282930 ... Última
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WEAKENING OF HORIZONTAL SEA SURFACE TEMPERATURE GRADIENTS AT LOW WIND SPEEDS WITH STRONG INSOLATION Gayana
Katsaros,Kristina B.
During days with strong insolation and low wind speed, there may be uneven net heating of the water layer near the surface of the ocean caused by variations in horizontal temperature at the sea surface. The heat loss from the water caused by evaporation, sensible, or longwave radiation is proportional to the sea surface temperature and is, therefore, greater from warm water compared to that from the relatively colder water. As a result, under low wind speed conditions and clear skies, the horizontal SST discontinuities, occurring at fronts, eddies, or in storm wakes, may diminish or even vanish. This phenomenon is illustrated here with some field and modeling results. The time dependence is important for the impact on remote sensing of SST, and it is found...
Tipo: Journal article
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200055
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WIND DIRECTION SIGNAL IN POLARIZED MICROWAVE EMISSION OF SEA SURFACE UNDER VARIOUS INCIDENCE ANGLES Gayana
Pospelov,Michael N..
The paper summarizes the experimental results obtained during a series of aircraft experiments carried out by Space Research Institute in 1980's in the northwestern Pacific. The measurements of wind direction signatures were conducted with K- and Ka-band polarimeters at near-nadir and grazing view angles. These data are compared with the results obtained by JPL-NASA and ETL-NOAA researchers at medium range of view angles, and also with SSM/I data. Both first and second azimuthal harmonics as a function of view angle are analyzed. The experimental results are also compared with theoretical calculations based on the various models of the directional spectrum of wind waves. Reasoning from model calculations and experimental data, an optimal range of...
Tipo: Journal article
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300032
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ZELUS CERVICALIS STÅL (HEMIPTERA: REDUVIIDAE: HARPACTORINAE), APORTE NEARTICO A LA ENTOMOFAUNA INTRODUCIDA EN CHILE Gayana
Elgueta,Mario; Carpintero,Diego L..
Se da a conocer el establecimiento en Chile de Zelus cervicalis Stål, 1872, cuya introducción reciente en el país se asocia al tráfico comercial. Se entrega una breve caracterización, sinonimia, referencias bibliográficas, distribución geográfica conocida y una figura del adulto
Tipo: Journal article Palavras-chave: Reduviidae; Zelus; Introducción; Chile central.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000100010
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Zooplankton interactions with the oxygen minimum zone in the eastern south pacific Gayana
Escribano,Rubén.
Zooplankton in the coastal upwelling zone off the eastern South Pacific must cope with a shallow oxygen minimum zone. In this work, I summarize available information on the zooplankton species that interact with the OMZ in the upwelling region off northern Chile. Data are available from the MinOx cruise carried out in March 2000 and the ZOMEI cruise perfomed in October 2005, both onboard the R/V Vidal Gormaz of the Chilean navy. Nineteen species of copepods and 10 of euphausiids were analyzed in their vertical distribution and migrating behavior. Several abundante species appeared constrained by the OMZ and restricted to the upper 50m layer. However, other abundant species inhabit temporarily or permanently the OMZ contributing substantially to the...
Tipo: Journal article Palavras-chave: Carbon flux; Copepods; Euphausiids; Vertical migration; Zooplankton.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300005
Registros recuperados: 584
Primeira ... 222324252627282930 ... Última
 

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