major cooling down of the northwestern Indian Ocean’s surface, including the
Arabian Sea, starts in May, according to a well-known world atlas of SSTs. This
is before the southwest monsoon which usually begins in June. Also within one
year, there are two surface temperature maxima and two minima, which is not
typical for the northern hemisphere. A surface current, cooler than the
surrounding water, crosses the equator in April and May heading north and east
on the western side of the ocean. That proposal is consistent with the given
SST information. The warmer surrounding water is
then moved to east and south as a consequence. Since wind driving is not available for initiation, the relatively cool northeastward current is thought to be
caused by a thermohaline force related to the unstable northward temperature
gradient in the west, which is of constant sign right across the equator
beginning in May: cool in the south monotonically increasing to warm in the
Cite this paper
Kenyon, K. (2014) Northwest Indian Ocean’s Spring Cooling. Natural Science
, 760-766. doi: 10.4236/ns.2014.610076
 US Navy (1944) World Atlas of Sea Surface Temperatures. 2nd Edition, US Navy, Washington DC.
 Moran, J.M. (2012) Weather Studies: Introduction to Atmospheric Science. American Meteorology Society, Boston, 286.
 Krishnamurti, T.N., Stefanova, L. and Mirsa, V. (2013) Tropical Meteorology. Springer Atmospheric Sciences, New York. http://dx.doi.org/10.1007/978-1-4614-7409-8
 Kenyon, K.E. (2013) The Wide Warm Current of the North Pacific. Lambert Academic Publishing, Saarbrucken.
 Kenyon, K.E. (2013) Seasonal Sea Surface Temperatures of the North Pacific. Natural Science, 5.
 Kenyon, K.E. (2013) Southward Surface Flow in the Central South Pacific. Natural Science, 5.
 Maury, M.F. (1963) The Physical Geography of the Sea and Its Meteorology. The Belknap Press of Harvard University Press, Cambridge, 61.
 Sverdrup, H.U. (1956) Transport of Heat by the Currents of the North Atlantic and North Pacific Oceans. In: Festskrift til Professor Bjorn Helland-Hansen, John Griegs Boktrykkeri, Bergen, 226-236.
 Murray, J. (1898) On the Annual Range of Temperature of the Surface Waters of the Ocean, and Its Relation to Other Oceanographic Phenomena. Geography Journal, 12, 113-137. http://dx.doi.org/10.2307/1774459
 Wyrtki, K. (1971) Oceanographic Atlas of the International Indian Ocean Expedition. National Science Foundation, Washington DC.