Physical Oceanography, Vol. 18, No. 4, 2008
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
REGIONAL FEATURES OF THE SEASONAL VARIABILITY OF LINEAR TRENDS
OF THE TEMPERATURE FIELDS IN THE ATLANTIC OCEAN AND THEIR
RELATION TO THE LARGE-SCALE CIRCULATION OF WATERS
Yu. V. Artamonov, M. V. Babii, A. E. Bukatov, and E. A. Skripaleva
By using the data array of satellite measurements of the sea-surface temperature (SST), it is
shown that the distributions of linear trends of the SST for 17 years (1986–2002) are closely cor-
related with the specific features of large-scale circulation of waters. The extreme values of
trends of the SST are observed in the zones of the Gulf Stream, East-Greenland, Labrador, and
North-Atlantic Currents, North Equatorial Countercurrent, South Equatorial and Antarctic Cir-
cumpolar Currents. The differences between the distributions of trends of the SST for some
months of the year are revealed. In the zones of currents transporting warm surface waters from
the tropical areas, positive trends of the SST are observed for the most part of the year. On the
contrary, negative trends are predominant in the zones of currents transporting cold upwelling
At present, the problems of changes in the climate are widely discussed in the literature [1–5]. It is shown
that the response of the ocean to global climatic processes running in various regions can be different. Thus, the
analysis of the temperature trends for 1945–1970 and 1970–1995 showed that the strongest warming was ob-
served in the east part of the Pacific Ocean, in the central part of the North Subtropical gyre in the Atlantic Oce-
an, and in the region of the Japan Current . Due to different amounts and quality of the analyzed data, the val-
ues of trends in the temperature of water can be noticeably different. For the open area of the ocean, where the
available data of observations are quite poor, these estimates are unreliable.
In the last decade, the data of satellite measurements are extensively used for the investigation of the space
and time variability of the kinematic and temperature characteristics of the sea surface [6–9]. Despite the fact
that the time length of the series of satellite measurements is relatively short for the analysis of long-term varia-
tions, the advantage of these data is connected with the fact that they uniformly cover the entire water area of the
World Ocean and enable one to solve the problems of interannual variability on a new qualitative level.
In the present work, on the basis of the data satellite measurements, we analyze the space and time distribu-
tions of the trends of SST in the Atlantic Ocean and describe their regional specific features for different months
of the year. We also discuss the seasonal variability of the trends connected with the variations of large-scale
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol, Ukraine.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
32–42, July–August, 2008. Original article submitted January 30, 2007;
revision submitted March 2, 2007.
194 0928-5105/08/1804–0194 © 2008 Springer Science+Business Media, Inc.