نتایج جستجو برای: sea surface temperature sst
تعداد نتایج: 1135293 فیلتر نتایج به سال:
Due to the significant amount of noise in Sea Surface Temperature (SST) images that originate from different atmospheric sources and the sensor itself, current detection methods detect false fronts or neglect to detect fronts. Various methods have been used to filter the SST images including low-pass filter [1], contextual filter [2], adaptive filtering [3] and others [4]. The present paper int...
A model for the climatological mean sea surface temperature (SST) of the tropical Pacific Ocean is developed. The upper ocean response is computed using a time dependent, linear, reduced gravity model, with the addition of a constant depth frictional surface layer. The full three-dimensional temperature equation and a surface heat flux parameterization that requires pecification ofonly wind spe...
Meteorological satellite data from 1982 to 1990 were used to identify areas of significant association between tropical Pacific sea surface temperature (SST) and remotely sensed normalized difference vegetation index (NDVI) anomalies, here taken as a surrogate for rainfall anomalies. During this period, large areas of arid and semi-arid Africa, Australia and South America experienced NDVI anoma...
The Advanced Very High Resolution Radiometer (AVHRR) instrument on-board the METOP satellite is designed to provide very accurate measurements of Sea Surface Temperature (SST). In this work, using one year of METOP-AVHRR data and a geostatistical approach, we characterize the spatial anisotropy and non-stationarity of the SST variability using oriented ellipsoids. The method is also able to sep...
The seasonal cycle of equatorial Atlantic sea surface temperature (SST) is characterized by a rapid cooling from April to July, coinciding with the onset of the West African summer monsoon and followed by a slow warming that lasts 3 times longer. Two ensemble simulations are carried out with an atmospheric general circulation model to investigate the mechanisms for the wind changes that cause t...
Impact of three different cyclones on the Bay of Bengal water and its surface chlorophyll concentration has been studied in three different zones during October-December 2000 using 24 scenes of IRS-P4 Ocean Color Monitor (OCM). The chlorophyll concentration found to be increasing up to 5.0 mg/m with effect of cyclones and hurricanes. The data has been correlated with Sea Surface Temperature (SS...
(SST) products currently available from the series of (Advanced) Along Track Scanning Radiometers, or (A)ATSRs, are found have small biases on regional scales (typically up to 0.3 K) and excellent error statistics in validation (~0.25 K or better). Long-term stability is at present poorly characterized. Work towards " version 3 " SSTs is under way within a project called (A)RC: (A)ATSR Re-analy...
Some land and ocean processes are related through connections (and synoptic-scale teleconnections) to the atmosphere. Synoptic-scale atmospheric (El Niño/Southern Oscillation [ENSO], Pacific Decadal Oscillation [PDO], and North Atlantic Oscillation [NAO]) decadal cycles are known to influence the global terrestrial carbon cycle. Potentially, smaller scale land-ocean connections influenced by co...
A set of geophysical error sources for the microwave remote sensing of ocean surface salinity have been examined. The error sources include the sea surface temperature, sea surface roughness, atmospheric gases, ionospheric Faraday rotation, and solar and galactic emission sources. I t is shown that the brightness temperature errors of a few Kelvin can be expected for most of these error sources...
| H igh sea surface temperature (SST) is generally required for deep convection that reaches the tropopause. In the current climate, the SST threshold for deep convection is somewhere around 26°–27°C, depending upon region and season (Gra-ham and Barnett 1987; Waliser et al. 1993). Over such warm oceans, SST changes cause deep convective adjustment , which in turn excites the dynamic response o...
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