Not exact matches
«Higher temperatures and
changes in precipitation result
in pressure on yields from important crops
in much of the world,» says IFPRI agricultural economist Gerald Nelson, an author of the report, «Climate
Change, Agriculture, and Food Security: Impacts and Costs of Adaptation to 2050».
Long - term
changes in temperature and
precipitation are making some rivers flood days, weeks or even months earlier than they did 50 years ago, and pushing flooding
in other areas
much later, researchers report August 11
in Science.
ADVANCES: Meteorologists can now detect
precipitation changes at a smaller scale, making it
much easier to forecast flash floods, says Jonathan Gourley, a research hydrologist at the National Severe Storms Laboratory
in Norman, Okla..
Wrestling with natural variability Scientists have looked for these
changes in rainfall patterns, but they are often difficult to distinguish because there is so
much natural variability
in precipitation.
And the question overtopping all: Will increased
precipitation, a consequence of climate
change already being seen
in much of the United States, exacerbate spring flooding?
Wiper blades are cheap, easy to
change, and often overlooked, especially if you live
in an area that doesn't get
much precipitation during the summer months.
And while that might make sense for the current situation, it is
much harder to understand for forecasts one week out (where the chance of
precipitation might
change from 80 % to 40 % to 20 % to 60 %
in a one - hour span for a period six days
in the future).
Note that the «
change in precipitation» Climate Wizard map is
much more important than the temperature
change.
I have noticed a few things, winter is greatly milder
in most parts of the Arctic, dominant winds have equally
changed there, rain or
precipitation patterns seem out of whack pretty
much everywhere else on Earth as well.
Regionally, the
changes in precipitation would grow dramatically, as the subttropical jet would transport moist tropical air into the mountains; but, the strengthening of the Hadley Cell would prevent
much of that moisture from forming large thunderstorm complexes outside of the higher elevations.
In weather systems, convergence of increased water vapor leads to more intense precipitation and the risk of heavy rain and snow events, but may also lead to reductions in duration and / or frequency of rain events, given that total amounts do not change muc
In weather systems, convergence of increased water vapor leads to more intense
precipitation and the risk of heavy rain and snow events, but may also lead to reductions
in duration and / or frequency of rain events, given that total amounts do not change muc
in duration and / or frequency of rain events, given that total amounts do not
change much.
And that a small variation
in temperature can signal
much greater
changes in other conditions, such as
precipitation and storms and river flow.
The way that our
precipitation will
change in the future is pretty
much dictated by what happens to those large storms.»
Precipitation has
much larger spatial and temporal variability than temperature, and it is therefore more difficult to identify the impact it has on
changes in many systems.
Previous climate models have shown that there didn't appear to be
much change in annual average
precipitation in California or
changes were unknown, even under aggressive warming scenarios.
In addition, climate
change is very likely to lead to more frequent extreme heat events and daily
precipitation extremes over most areas of North America, more frequent low snow years, and shifts towards earlier snowmelt runoff over
much of the western US and Canada (high confidence).
Changes in precipitation become more important at
in colder locations and higher elevations where they determine whether any or how
much precipitation falls.
Despite a half century of climate
change that has significantly affected temperature and
precipitation patterns and has already had widespread ecological and hydrological impacts, and despite a near certainty that the United States will experience at least as
much climate
change in the coming decades, just as a result of the current atmospheric concentrations of greenhouse gases, those organizations
in the public and private sectors that are most at risk, that are making long - term investments and commitments, and that have the planning, forecasting and institutional capacity to adapt, have not yet done so.
To be useful
in a risk context, climate
change assessments therefore need a
much more thorough exploration of the tails of the distributions of physical variables such as sea level rise, temperature, and
precipitation, where our scientific knowledge base is less complete, and where sophisticated climate models are less helpful.
Alex would probably say that you need to
change «never ice» to «more
precipitation and more snow»
in your comment JimD and you would be
much closer to understanding.
Even worse, climate models seemingly underestimate how
much precipitation has
changed already — further reducing confidence
in their ability to project future
changes.
But, interest
in precipitation, jet stream, hurricane pattern
changes encompass
much more than just temperature.
The increasingly extreme behavior of
precipitation in California — which could very well occur without
much of a
change in California's overall average
precipitation — may increase the risk of both drought and flood events
in the state.
And where there's such a huge
precipitation shift, because the amount of moisture isn't
changing that
much in the air as a net, there will be droughts as well, too, more frequently.
Changes in precipitation could be the cause as much as changes in tempe
Changes in precipitation could be the cause as
much as
changes in tempe
changes in temperature.
But
much of it is, including
changes in the frequency and variance of
precipitation, the proportion of dry days, and
changes in river flow and runoff.