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Details van artikel 139 van 268 gevonden artikelen
| Titel: |
Impact of satellite remote sensing on ocean modeling—an overview |
| Auteur: |
Gowda, H. Honne Manikiam, B. Jayaraman, V. Chandrasekhar, M. G. |
| Verschenen in: |
International journal of remote sensing |
| Paginering: | Jaargang 14 (1993) nr. 17 pagina's 3317-3331 |
| Jaar: |
1993-11-01 |
| Inhoud: |
Three-quarters of the Earth's surface is covered by oceans and they dominate the overall impact on weather and climate system. Yet much about the ocean still remains to be understood, largely due to lack of detailed and accurate observations over the oceans. A satellite platform, with its synoptic view and capability to give spatially continuous data on a repetitive basis has increased the possibilities for studying oceans and ocean-atmosphere system in greater detail and for providing valuable inputs for modelling efforts. Optimum exploitation of ocean resources calls for detailed knowledge of the hydro-biological and related aspects of the environment. Several studies using passive and active models of satellite measurements have proved their potential in understanding the ocean-atmosphere systems. Complementary conventional systems, e.g., ships and buoys, provide detailed temporal and in-depth coverage at specific points, and are used in conjunction with satellite observations over large areas. Many ocean-related studies have reached near operational level and suitable sensors have been developed. The ocean colour measured by optical sensors is found to bear the direct relation to the suspended material of the water, thermal characteristics and location of greenish biological materials. Sea surface temperature and thermal patterns are amenable to measurements using thermal sensors. The ocean currents caused primarily by surface winds, have been studied with satellite microwave sensors like the altimeter, which also have provided significant information on wave height and wind speed. The thermal structure of ocean layers has been mapped using infrared radiometry. Wind scatterometers arc ideal for the measurement of wind speed and direction, while synthetic aperture radar (SAR) provides information on bi-directional wave spectra. Microwave sensors have also been found to be useful in mapping sea-ice features, nearshore bathymetry, etc. The updated information on wetlands, geomorphology, erosion/ accretion, sediment transport, pollutant dispersal, etc., which could be obtained from satellite based remote sensing, have proved invaluable towards scientific management of the coastal zones. This article reviews the state-of-the-art of various satellites and sensors and expected accuracies from satellite-based measurements and their utility in ocean modelling. It also outlines the future scenario of satellite missions and their impact on scientific studies. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 139 van 268 gevonden artikelen
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