Physical Oceanography, Vol. 17, No. 6, 2007
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
SPECIFIC FEATURES OF THE FIELD OF SURFACE TEMPERATURE IN
THE TROPICAL ATLANTIC
S. G. Boguslavskii, S. I. Kazakov, E. V. Berestovaya, and M. V. Boguslavskaya
On the basis of generalization of the data of many-year hydrological observations and the data of
meteorological satellites accumulated in recent years, we characterize some specific features of
the surface temperature in the Tropical Atlantic. The influence of solar radiation, local heat
balance, and the advective and diffusion heat transfer on the temperature of the water surface is
analyzed. The mechanism of formation of the thermohalocline and local sites of elevated tempe-
rature near the estuaries of large rivers (such as the Amazon, Orinoco, Mississippi, Congo, and
Niger) is described. We also characterize the formation of the seasonal variability of the near-
equatorial temperature maximum, equatorial temperature minimum, and equatorial divergence
The data on the sea-surface temperature (SST) are required for the climatic description of the ocean and the
analysis of gas exchange and thermal and dynamic interactions between the ocean and the atmosphere. These
data are used in the oceanography of fishing and tropical meteorology for the investigation of some phenomena.
Among these phenomena, we can mention, e.g., the formation of tropical hurricanes and self-regulating intensity
of the trade winds. For several last decades, the processes of climate and weather formation have become more
complicated under the influence of anthropogenic factors, among which the predominant role is played by exten-
sive emissions of carbon dioxide into the atmosphere.
In the present work, we generalize the specific features of the temperature field in the Tropical Atlantic stu-
died on the basis of the data of many-year observations performed in marine expeditions and compare these data
with the results of the analysis of satellite measurements carried out for the last years. The satellite maps of cur-
rent temperature of the oceans contain much more data and, in addition, differ from the hydrological maps by the
values of temperature because, in the presence of of waves, the contact measurements of temperature are carried
out at different distances from the mean level of the water surface.
Characteristics of the Applied Satellite Data
To construct the maps of SST, we use the data of remote (satellite) surveys carried out by the US National
Ocean and Atmosphere Administration (NOAA) available at the Internet sites http://www.noaa.gov and http://
Experimental Department of the Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Katsiveli.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
28–38, November–December, 2007. Original article submitted April 27,
338 0928-5105/07/1706–0338 © 2007 Springer Science+Business Media, Inc.