In combination these two could possibly produce a «measurable» decline in the rates of warming, but I suspect that it would be measurable only if there was an equivalent Earth without the greater melting and
evaporation rates so that a comparison could be made.
Not exact matches
Simultaneously, as the average liquid droplet becomes smaller through
evaporation, the vapor's density increases,
so more vapor molecules merge at a faster
rate to become microscopic liquid droplets, and more water molecules are ionized.
A bowl with less surface area will reduce the
evaporation rate as well,
so use a bowl that is narrow, but deep.
Evaporation rates do indeed seem to be rising (Yu & Weller 2007), and
so is tropospheric water vapor (Trenberth et al 2009 at 317).
I know that actual evapotranspiration, potential
evaporation, and potential evapotranspiration are often distinguised in the literature,
so I also wanted to confirm what the potential
evaporation rate in this dataset represents.
that is because the water vapor pressure is supralinearly related to temperature: that is, a temp rise from 289K to 290K has a larger effect on vapor pressure (
so, most likely, on the
evaporation rate) than does a temp rise from 288K to 289K.
So if one increases the
rate of downwelling IR (thereby increasing the
evaporation rate) then the increase in upward energy flow caused by the fall in the temperature of that 1 mm layer will be greater than the decrease in upward energy flow that will result from any reduced temperature differential between the topmost Knudsen layer and the ocean bulk arising from the application of Fourier's Law.
Conversely, if you add heat to the system, two things will happen, the water will warm and the
rate of
evaporation will increase until the water vapor partial pressure gets high enough
so that the
rate of condensation again equals the
rate of
evaporation.
However DLR never gets past the skin layer
so although it adds to the skin temperature it also adds to the
rate of
evaporation and as
evaporation has a net cooling effect (the enthalpy of vapourisation is GREATER than the energy required to provoke
evaporation) more (formerly) DLR energy is pulled out of the local environment than is required to provoke that EXTRA
evaporation.
We can't measure the
evaporation rate or rainfall pattern, but we are allowed to look at the number of tourists who stay in nearby hotels, some of whom state if they have fishermen or windsurfers staying, and
so one can use these as proxies for sunlight / rainfall patterns (CO2 partitioning into temperature dependent aquatic bodies).
Note that hot dry air above water will increase the
rate of
evaporation but
so also does cold dry air above water.
The
rate of
evaporation always increases in proportion to the supply of extra energy to water molecules at the surface or to molecules of air that are in contact with the water surface
so that no warming of the ocean by the air can occur.
If the cool air is saturated
so that the
rate of
evaporation can not increase then the water surface releases steam instead and the extra energy is still released into the air and radiated away upwards and not into the water below.
As regards a warming of the ocean skin,
evaporation is a continuous process caused by temperaure, density and pressure (not just temperature) differentials between water and air
so that the
rate of
evaporation accelerates when a water surface is warmed such as from the warming effect of extra greenhouse gases (especially if the air is dry).
So again the devil is in the details — IMO the temperature hypothesis does stack up in the recent drought with high
evaporation rates to boot.