The weaker temperature gradient would have
meant less rainfall and more evaporation in the midlatitude North Pacific.
Not exact matches
As the logic — and science — goes, a cooler, geoengineered planet
means less evaporation, and thus
less rainfall.
Less rainfall to the area will
mean reduced runoff into water basins that feed irrigated fields.
Climate models agreed even
less on how the conflicting daily changes affect annual
mean rainfall.
Increased
rainfall could
mean more vegetation and therefore
less soil exposed to wind erosion in the Sahel.
This lower - intensity
rainfall implies
less runoff over the surface, which
means we should see a decline in runoff over a whole basin.
The bureau has also been practicing a
less well - honed strategy that involves overseeding the clouds to actually prevent
rainfall; this technique increases the number of ice crystals in a cloud but decreases their
mean size, which makes them
less likely to fall as rain.
Warmer temperatures
mean hotter days in the field and
less predictable
rainfall, which throws off the entire farming process and leaves producers without a crop to sell.
My own analysis for my neck - of - the - woods (slightly
less definite due to the data from the local weather station having stalled in May 2013 — probably due to spending cuts)-- February saw record
rainfall, 38 % above the previous 55 - year February maximum and 3.35 sd above the February
mean.
Part way there, but no quantitation yet: of the 3.77 W / m ^ 2 radiated back dowwnard, most goes to increased rate of evaporation of the water at the surface, and much
less goes to increased
mean temp increase at the surface; hence increased rate of non-radiative transfer of heat from surface to upper atmosphere, slight increase in
rainfall as hydrological cycle is faster, and slight increase in cloud cover.
That
means that you have a 50 % chance of
less than median
rainfall.
We find that the moisture - related parameters,
rainfall and the Palmer Drought Severity Index (PDSI), and to a
lesser extent, maximum and
mean temperatures, can be reconstructed.
Those effects include more
rainfall that occurs in heavy downpours,
meaning less is absorbed into the earth and more becomes runoff; more rain and
less snowfall in the mountains, which
means less melting snow to feed rivers in the spring and summer; and higher temperatures causing more evaporation.