Not exact matches
has
decreased in winter, but no significant change in annual
mean precipitation potentially because of very slight increases in spring and fall
precipitation;
precipitation is projected to increase across Montana, primarily in spring; slight
decrease in summer
precipitation; variability of
precipitation year - to - year projected to increase
Statewide
precipitation has
decreased in winter (0.14 inches / decade -LSB--0.36 cm / decade]-RRB- since 1950, but no significant change has occurred in annual
mean precipitation, probably because of very slight increases in spring and fall
precipitation.
In that case (along with greater
precipitation, and the
precipitation belt moving to higher latitudes), there could be more snow in the winter & greater melting in the summer (in higher latitudes), while I'd think the lower latitudes (with less precip) and the local
mean temp being higher, would melt the glaciers faster, without adequate snowfall & low winter temps to slow this glacial
decrease.
Decreases in
precipitation over many subtropical areas are evident in the multi-model ensemble
mean, and consistency in the sign of change among the models is often high (Wang, 2005), particularly in some regions like the tropical Central American - Caribbean (Neelin et al., 2006).
As for how this could be — and in light of the findings of the references listed above — Rankl et al. reasoned that «considering increasing
precipitation in winter and
decreasing summer
mean and minimum temperatures across the upper Indus Basin since the 1960s,» plus the «short response times of small glaciers,» it is only logical to conclude that these facts «suggest a shift from negative to balanced or positive mass budgets in the 1980s or 1990s or even earlier, induced by changing climatic conditions since the 1960s.»
Hotter days
mean more evaporation, worsening the impacts of droughts even when there isn't a significant
decrease in
precipitation.
Based on process understanding and agreement in 21st century projections, it is likely that the global frequency of occurrence of tropical cyclones will either
decrease or remain essentially unchanged, concurrent with a likely increase in both global
mean tropical cyclone maximum wind speed and
precipitation rates.
Increases in heavy
precipitation have also been documented even when
mean total
precipitation decreases (for example, see Northern Japan in Figure 2.35, or Manton et al., 2001).
Projected temperature would increase by 2050 by about 2 °C above the current level (a warming similar to that predicted by the ensemble
mean of the CMIP5 simulations) and
precipitation would
decrease by an additional 30 % compared to the current conditions.
While the HadCM3 - projected
mean annual
precipitation during 2070 to 2099 at El Reno, Oklahoma,
decreased by 13.6 %, 7.2 %, and 6.2 % for A2, B2, and GGa1, respectively, the predicted erosion (except for the no - till conservation practice scenario) increased by 18 - 30 % for A2, remained similar for B2, and increased by 67 - 82 % for GGa1.
In the coming century, increasing atmospheric GHG concentration and associated warming could have important hydrological and water resource consequences in the Southwest resulting from
mean state changes due to higher evaporation and
decreased precipitation [73 — 75].
It is perfectly conceivable, for example, to have annual
precipitation increase 10 to 20 % at the same time that
mean annual surface water runoff
decreases by 10 to 20 % (or even more).
Another aspect of these projected changes is that wet extremes are projected to become more severe in many areas where
mean precipitation is expected to increase, and dry extremes are projected to become more severe in areas where
mean precipitation is projected to
decrease.
The long - term
mean annual
precipitation decreased from 816 mm year − 1 at the moist to 544 mm year − 1 at the driest site, and the
mean annual temperature increased along this gradient from 8.5 to 9.1 °C (Table 1).
«Indeed it is estimated that annual
mean temperature has increased by over 2 °C during the last 70 years and
precipitation has
decreased in most regions, except the western part of the country, indicating that Mongolia is among the most vulnerable nations in the world to global warming.»
During the last century,
mean precipitation in all four seasons of the year has tended to
decrease in all the main arid and semi-arid regions of the world, e.g., northern Chile and the Brazilian North - East, West Africa and Ethiopia, the drier parts of Southern Africa and Western China (Folland et al., 2001).