Sentences with phrase «average precipitation increase»

Because the models predict little average precipitation increase nationwide over this period, the product of CAPE and precipitation gives about a 12 percent rise in cloud - to - ground lightning strikes per degree in the contiguous U.S., or a roughly 50 percent increase by 2100 if Earth sees the expected 4 - degree Celsius increase (7 degrees Fahrenheit) in temperature.

Because the models predict little average precipitation increase nationwide over this period, the product of CAPE and precipitation gives about a 12 percent rise in cloud - to - ground lightning strikes per degree in the contiguous U.S., or a roughly 50 percent increase by 2100 if Earth sees the expected 4 - degree Celsius increase (7 degrees Fahrenheit) in temperature.

Not exact matches

Over the 121 - year period of record, precipitation across the CONUS has increased at an average rate of 0.16 inch per decade.

Average winter precipitation has decreased by 0.9 inches (2.3 cm), which can mostly be attributed to natural variability and an increase in El Niño events, especially in the western and central parts of the state.

Northwestern Montana receives an average of 9.4 inches (23.9 cm) of winter precipitation, but locally, and at higher elevations within the mountains, this value can increase to greater than 20 inches (50.8 cm).

ACPI assumes a 1 percent annual increase in the rate of greenhouse gas concentrations through the year 2100, for little change in precipitation and an average temperature increase of 1.5 to 2 degrees centigrade at least through the middle of 21st century.

The majority of models suggest a slight increase in total average annual precipitation across the state, largely occurring in spring, particularly in the northwest.

Rising CO2 levels have been linked to the globe's average temperature rise as well as a host of other changes to the climate system including sea level rise, shifts in precipitation, ocean acidification, and an increase in extreme heat.

«During November 2011 - January 2012, there is an increased chance of above - average temperatures across the south - central U.S. with the odds favoring below - average temperatures over the north - central U.S.. Also, above - average precipitation is favored across the northern tier of states, excluding New England, and drier - than - average conditions are more probable across the southern tier of the U.S. (see 3 - month seasonal outlook released on 20 October 2011).»

A 1 degree average annual increase in summer temperatures, or a 25 % decrease in precipitation?

Averaging smoothes out day - to - day and year - to - year natural weather variability and extremes, removing much of the chaotic behavior, revealing any underlying long term trends in climate, such as a long term increase or decrease in temperature, or long term shifts in precipitation patterns.

Further, let's agree that this will on average cause more precipitation due to increased evaporation at these higher temperatures (the best data I have seen say that the precipitation trend over the continental US — where we have the best long term records — is up 5 - 10 % over the last century).

As temperatures go up, on average the ratio between precipitation and evaporation goes down, increasing droughts.

Averaged over the mid-latitude land areas of the Northern Hemisphere, precipitation has increased since 1901 (medium confidence before and high confidence after 1951).

Climate scientists have already shown that increasing greenhouse gas concentrations as a consequence of human activity are partially responsible for the average global increase in heavy precipitation.

Since 1896, winter (January - February) precipitation has risen more than 11 inches and the average temperature has increased 1.6 degrees Fahrenheit, mostly due to higher winter lows.

On average in the United States, the amount of rain falling during the heaviest 1 percent of rainstorms has increased nearly 20 percent during the past 50 years — almost three times the rate of increase in total precipitation.4, 5 The Midwest saw an even larger average increase of 31 percent, surpassed only by the Northeast (at 67 percent).4 Scientists attribute the rise in heavy precipitation to climate change that has already occurred over the past half - century.6

These facts help explain why, in spite of the Earth's air temperature increasing to a level that the IPCC claims is unprecedented in the the past millennium or more, a recent study by Randall et al. (2013) found that the 14 % extra carbon dioxide fertilization caused by human emissions between 1982 and 2010 caused an average worldwide increase in vegetation foliage by 11 % after adjusting the data for precipitation effects.

I present a graph from NOAA of change in average global temperature from 1880 to today and then show the graph of the U.S. increase in heavy precipitation days from 1950 to today.

Scientists agree that the effects of climate change will include more sporadic and irregular precipitation, with longer periods of drought separated by more intense rainfall; and increasing average temperatures.

2: Our Changing Climate, Key Message 5).2 Regional climate models (RCMs) using the same emissions scenario also project increased spring precipitation (9 % in 2041 - 2062 relative to 1979 - 2000) and decreased summer precipitation (by an average of about 8 % in 2041 - 2062 relative to 1979 - 2000) particularly in the southern portions of the Midwest.12 Increases in the frequency and intensity of extreme precipitation are projected across the entire region in both GCM and RCM simulations (Figure 18.6), and these increases are generally larger than the projected changes in average precipitatIncreases in the frequency and intensity of extreme precipitation are projected across the entire region in both GCM and RCM simulations (Figure 18.6), and these increases are generally larger than the projected changes in average precipitatincreases are generally larger than the projected changes in average precipitation.12, 2

The pattern of change for the wettest day of the year is projected to roughly follow that of the average precipitation, with both increases and decreases across the U.S. Extreme hydrologic events are projected to increase over most of the U.S.

Model projections for precipitation changes are less certain than those for temperature.12, 2 Under a higher emissions scenario (A2), global climate models (GCMs) project average winter and spring precipitation by late this century (2071 - 2099) to increase 10 % to 20 % relative to 1971 - 2000, while changes in summer and fall are not expected to be larger than natural variations.

While there was no apparent change in drought duration in the Midwest region as a whole over the past century, 90 the average number of days without precipitation is projected to increase in the future.

«We're seeing increasing temperatures and relatively little change in average precipitation, but an increase in the variability and the occurrence of both wet and dry extremes,» said Daniel Swain, an atmospheric scientist at Stanford's School of Earth, Energy & Environmental Sciences and the lead author of a new paper published in Science Advances.

• «Average autumn precipitation has increased by 30 percent for the region since 1901; heavy downpours have increased in many parts of the region, and the percentage of the region experiencing moderate to severe drought has risen over the past three decades.»

The researchers used recent historical data and not climate modeling, so the study does not make any future predictions, but Swain says the findings appear to be consistent with other climate research that reveals there is little change in average precipitation, but an increase in the amount of very wet or very dry periods.

Overall, it is likely that there has been a 2 to 4 % increase in the number of heavy precipitation events when averaged across the mid - and high latitudes.

AOGCM experiments suggest that global - average annual mean precipitation will increase on average by 1 to 3 % / °C under the enhanced greenhouse effect (Figure 9.18).

The average relative humidity in cities is usually several percent lower than that of adjacent rural areas, primarily because of increased runoff of precipitation and the lack of evapotranspiration from vegetation in urban areas.

[20] In the US southern climatic region (which extends from Mississippi through Texas) the number of daily heavy precipitation events has increased by 25 percent over the long - term average, and tropical cyclones contributed 48 percent of that increase.

Average precipitation is changing in many regions with both increases and decreases and there is a general tendency for increases in extreme precipitation observed over land areas.

The widespread trend of increasing heavy downpours is expected to continue, with precipitation becoming less frequent but more intense.13, 14,15,16 The patterns of the projected changes of precipitation do not contain the spatial details that characterize observed precipitation, especially in mountainous terrain, because the projections are averages from multiple models and because the effective resolution of global climate models is roughly 100 - 200 miles.

The models are in better agreement when projecting changes in hurricane precipitation — almost all existing studies project greater rainfall rates in hurricanes in a warmer climate, with projected increases of about 20 % averaged near the center of hurricanes.

2: Our Changing Climate, Key Messages 5 and 6).4, 10 A range of model projections for the end of this century under a higher emissions scenario (A2), averaged over the region, suggests about 5 % to 20 % (25th to 75th percentile of model projections) increases in winter precipitation.

Projections of future changes in precipitation show small increases in the global average but substantial shifts in where and how precipitation falls.

Since 1895, precipitation across the CONUS has increased at an average rate of 0.16 inch per decade.

For terrestrial British Columbia, precipitation averages and extremes can be simulated more accurately within individual regions by using gridded downscaling to increase the resolution of both global and regional climate models.

Average annual statewide precipitation increased by 8 % from 1873 to 2008.

For terrestrial British Columbia, precipitation averages and extremes can be simulated more accurately within individual regions by using gridded downscaling to increase the resolution of regional climate models.

Most model results project increased interannual variability in season - averaged Asian monsoon precipitation associated with an increase in its long - term mean value (e.g., Hu et al., 2000b; Räisänen, 2002; Meehl and Arblaster, 2003).

According to the National Climate Assessment, average rainfall during heavy precipitation events across the Northeast, Midwest and Great Plains has increased by 30 percent since 1991.

There was a small decline in streamflow as well, despite a small increase in precipitation on average.

These include increased average land and ocean temperatures that lead to reduced snowpack levels, hydrological changes, and sea level rise; changing precipitation patterns that will create both drought and extreme rain events; and increasing atmospheric CO2 that will contribute to ocean acidification, changes in species composition, and increased risk of fires.

The projections also indicate an increase in the basin - averaged precipitation and an increase in the frequency of extreme precipitation events over the region as a whole.

Current models suggest ice mass losses increase with temperature more rapidly than gains due to increased precipitation and that the surface mass balance becomes negative (net ice loss) at a global average warming (relative to pre-industrial values) in excess of 1.9 to 4.6 °C.

The warming (WV is a ghg) is welcome (countering the average global cooling which would otherwise be occurring as a result of declining net effect of ocean cycles and a declining proxy which is the time - integral of SSN anomalies) but the added WV increases the risk of precipitation related flooding.

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.

Which is a bit strange considering a report from the European Environment Agency showing that temperatures in the Alps are increasing a twice rate of the global average with more droughts and greater seasonal variability in precipitation forecast.

Additionally, the Intergovernmental Panel on Climate Change's 2001 report notes that «global average water vapour concentration and precipitation are projected to increase during the 21st century.»