When four hurricanes of extraordinary strength tore through Florida last fall, there was little media attention paid to the fact that hurricanes are made more intense
by warming ocean surface waters.
Rising ocean surface temperatures in the tropical North Atlantic, combined
with warmer ocean surface temperatures in the tropical east Pacific, will affect atmospheric circulation and pressure patterns, reports climate scientist Richard Betts of the Met Office Hadley Centre in England.
A regional climate model study examines the influence
of warm ocean surface temperatures in the eastern tropical Atlantic in summer to see what an increase of a few degrees Celsius does to rainfall.
(I think that an
anomalously warm ocean surface heated from below would lead to more evaporation, and the additional water vapor would give a positive greenhouse effect that would partially offset the effect of a drop in greenhouse gas concentrations.)
THERE HAS BEEN A WARMING TREND FROM THE 70s THRU THE LATE 90s,... accompanied by other changes tied to a warming trend (record low arctic sea ice extent & thickness, retreating glaciers, retreating snow lines,
warming ocean surface temps, increases in sea height, de-alkalinizing oceans).
Warmer ocean surfaces cause increased evaporation and once the energy in the extra water vapour is in the air from that cause then the change in the speed of the hydro cycle deals with it routinely.
Warmer air can carry more moisture, which can lead to more extreme rainfall events, and
warmer ocean surface temperatures are known to intensify the most powerful hurricanes.
The thermal gradient through this layer dictates the rate of heat loss from the (typically)
warmer ocean surface, to the cooler atmosphere above.
The warmer the ocean surface, the more energy that is available to intensify these storms.
And
the warmer the ocean surface, the more moisture there is in the atmosphere — moisture that is available to form precipitation.
Just as it is officially predicted that CO2 - driven warming will be greatest in the upper air, which will in turn warm the surface, so it is predicted that the near - surface air will
warm the ocean surface, which will warm the deeps.
Hurricanes may increase in intensity due to
warmer ocean surface temperatures.
AGW proponents accept that the virtual cessation of warming over the past 13 years (Figure 3) is a result of cooler ocean surfaces but refuse to accept the corollary that the primary cause of the warmer period was
warmer ocean surfaces.
e) That
a warmer ocean surface increases the surface / space temperature differential yet does not give rise to a significant increase in loss of energy to space.
If you still think a cold atmosphere can warm a (much)
warmer ocean surface (let alone the DEEP oceans),
Hybrid storms and climate change: Sandy, continues Emanuel, is a «hybrid storm» — in other words, it has characteristics of tropical cyclones (hurricanes) that get their energy from
the warm ocean surface, but also of winter cyclones that get their energy from temperature contrasts in the atmosphere.
That is what happens when oceans naturally increase their emission of energy and the response of the air is exactly the same whether
the warmer ocean surface is a result of enhanced energy emission from the ocean or enhanced energy in the air from another cause such as more humidity or more CO2.