Sentences with phrase «snowpack since»

The red dots indicate 307 stations that saw a decline in snowpack since 1982, while the blue dots show the 47 that saw an increase.

The Cascades have lost 60 percent of their snowpack since the 1950s, most of that due to rising temperatures.

Not exact matches

California had the highest number of positive snowpack trends since 1955, but lingering drought during the past decade erased most of those gains and snowpack declines still dominated;

Since 1915, the average snowpack in western states has declined by between 15 and 30 percent, the researchers say, and the amount of water lost from that snowpack reduction is comparable in volume to Lake Mead, the West's largest manmade reservoir.

The Sierra Nevada snowpack, which provides about 65 percent of the state's water, has been declining since 1950, and a quarter of the snow is projected to disappear by 2050.

Sampling 7,000 - year - old ice cores as well as snowpack dating from 1969 through the mid-1990s, Barbante's team found that concentrations of the metals had risen almost sevenfold since the mid-1970s, when catalytic converters first came into widespread use.

Montana's snowpack has declined over the observational record (i.e., since the 1930s) in mountains west and east of the Continental Divide; this decline has been most pronounced since the 1980s.

The average snowpack in the Cascades has declined 50 percent since 1950 and will be cut in half again in 30 years if we don't start addressing the problems of climate change now.

In the Rocky Mountains, spring (February - March) warming since the 1980s has been largely responsible for recent snowpack declines at mid - and low - elevation sites (Pederson et al. 2013b).

They include soaring temperatures, declining late - season snowpack, northward - shifted winter storm tracks, increasing precipitation intensity, the worst drought since measurements began, steep declines in Colorado River reservoir storage, widespread vegetation mortality, and sharp increases in the frequency of large wildfires.

Three different types of data sets are utilized to identify the changes in snowpack across the North Cascades since 1946 with time and elevation:

According to official records, California's snowpack is the lowest on record for this time of year at around a mere 20 % of the average since records began.

The implications are important, since climate studies indicate the snowpack in mid-elevation forests in the Western United States and other similar forests around the world has been decreasing in the past 50 years because of regional warming.

Boulder Glacier has retreated 500 m since 1987, yet even in the years with the lowest retained snowpack there is still an accumulation zone at the top of the glacier.

Sea levels are rising (ask the Mayor of Miami who has spent tax monies to raise road levels), we've had 15 of the hottest years eve measured, more precipitation is coming down in heavy doses (think Houston), we're seeing more floods and drought than ever before (consistent with predictions), the oceans are measuring warmer, lake ice in North America is thawing sooner (where it happens in northern states and Canada), most glaciers are shrinking, early spring snowpacks out west have declined since the 1950's, growing seasons are longer throughout the plains, bird wintering ranges have moved north, leaf and bloom dates recorded by Thoreau in Walden have shifted in that area, insect populations that used to have one egg - larva - adult cycle in the summer now have two, the list goes on and on.

The 10 - year period ending in 2007 witnessed fewer severe cold snaps than any other 10 - year period since record keeping began in 1895.2 These changes can not be explained by natural variation, and correspond very well with computer simulations that include human influences on climate.3 Snow cover has decreased in most regions, especially in the spring, and mountain snowpack has also decreased in several regions.4

California's mountain snowpack — a lifeblood of the thirsty state's water resources — has reached an anemic state not seen since record - keeping began in 1930.

The average snowpack in the Cascades has declined 50 percent since 1950 and will be cut in half again in 30 years if we don't start addressing the problems of climate change now.

Additionally, insoluble impurities concentrate at the surface when snow melts since meltwater percolates down through the snowpack more efficiently than do particulates [e.g., Doherty et al., 2013].