Chapter 4: FINE STRUCTURE AND MICROSTRUCTURE
upper 7-12 cm of the ocean and a thermocline in the upper 1 m with a
temperature difference of 1.3-1.4P
o
PC
(X Figure 4-31X a). The vertical temperature
profile obtained 17 minutes later (X Figure 4-31X b) has a similar diurnal mixed
layer. The intermediate thermocline that is seen in X Figure 4-31X b near 3 m is
presumably of advective nature.
Figure 4-31. Vertical temperature profiles in the upper 5 m according to measurements with a
free-rising profiler in the Sargasso Sea during POLYMODE on 1 October 1977 at (a) 14:47,
The temperature profile taken on the same day but in the evening time
(17:31 LT) is shown in X Figure 4-31X c. The diurnal mixed layer depth
increased to approximately 1 m. The diurnal thermocline became sharper;
the temperature difference across the diurnal thermocline dropped to
approximately 0.8P
o
PC.
There are also inversions and other microstructure
271
(b) 15:04, and (c) 17:31. (After Soloviev, 1979.) Adapted by permission from American Geophysical
Union from Izvestiya, Atmospheric and Oceanic Physics 15, 514-517, 1980 AGU.
©