Sentences with phrase «snowpack by»

NOHRSC measures the water equivalent of a snowpack by making many flights above hundreds of established flight lines.

Sustainable groundwater management is essential to adapt to this massive loss of water storage and continued decline in snowpack — California is projected to lose up to 80 percent of its historic snowpack by the end of the century as temperatures continue to rise.

While we have long range climate predictions that show a decline of snowpack by the end of the century and short - range rain and snow forecasts, until now there has been little information on what to expect in the next two months to two years.

Not exact matches

The reasons for this are many: less cold water from Sierra snowpack, less cold freshwater being released from the Delta due to farming needs and other water policies, warm waters caused by El Nino flowing into the Bay, and other variables.

Seems like just a few short weeks ago that we were placing wagers around the office about if the historic Boston Winter of 2015 snowpack would recede by Mother's Day or the Fourth of July.

Roughly 210 million people live in the region, and another 1.3 billion people who live downstream depend on rivers fed in part by glaciers and mountain snowpack.

«West Coast record low snowpack in 2015 influenced by high temperatures.»

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 snowpack we had this year was below average — around 70 percent of average towards the end of February, followed by one of the driest, warmest Marches on record,» said Tim Mathews, a fire meteorologist with the Rocky Mountain Coordination Center.

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.

Driven by drought and low snowpack, 2015 broke all the records in Washington state.

The Sierra Nevada normally hits maximum snowpack for the year in early April, but by April 1, alpine meadows usually buried in 5 feet of snow were bare.

The excessive heat increased the rate of water loss by evaporation and caused precipitation to shift from snow to rain, leaving a meager snowpack and parched reservoirs.

When the researchers took density of snow into account, they found that ice shelves lost about five times more ice by submarine melting than they gained from new surface snowpack.

«Increased runoff caused by dust on snowpack acts as a major leak in the reservoir system,» says Thomas Painter, a professor of geography at the University of Utah.

That glimpse into the past was provided by 66 tree - ring data sets scientists used to stitch together an annual record of snowpack far older than modern observations, which began in the early 20th century.

As for the snowpack, the models show it decreasing by at least 30 percent.

The researchers then went to an intermediate elevation and simulated climate change by reducing the snowpack, which made the plants flower seven days early, similar in magnitude to flowering time shifts over 20 to 30 years of climate change.

Of course, long before climate change threatened the snowpacks, unbridled trapping and poisoning had driven most wolverines from the continental U.S. Wolverines hung on in the northern Rockies, but the thin populations in Colorado, Michigan, Minnesota and the Northeast were gone by the middle of the 20th century.

By summer, the Sierra Nevada snowpack — L.A.'s lifeblood — was half of normal.

This year, heavy snowpack and spring precipitation have brought the region some relief by partially refilling the reservoirs.

In addition, the structure of the snowpack is changing: it is being transformed by increasingly warmer air temperatures and / or altered by rain - on - snow events.

A 2016 report by the Bureau of Reclamation predicts that the basin's snowpack is likely to decrease, stemming the flow of runoff in spring and early summer.

«But the snow is darkened by other things as well, like organics, and also by dust and soil that can get in the snowpack.»

stories,» says Musselman, who used historical snowpack measurements and computer models to predict how the melting rate will change by the end of the century (Nature Climate Change, DOI: 10.1038 / NCLIMATE3225).

First, because Albright illustrates the supposed lack of a trend by comparing specific periods (e.g. 1940 - 1949 vs. 1997 - 2006), in which snowpack has increased in some locations.

Conversely, particularly high - snowpack years may effectively compensate for warming temperatures by offsetting rapid snowmelt.

Topography can also influence fire behavior by determining local microclimates — for example, variations in local snowpack, temperature, and humidity (Holden and Jolly 2011)-- or alignment with prevailing winds (Sharples 2009) which increase fire spread.

A new study shows that the climate simulated by a numerical climate model can depend surprisingly much of what is assumed about the snow grain shapes when computing the reflection of solar radiation by the snowpack.

This varies from year to year, and the onset of the fire season can be delayed by abundant mountain snowpack or a cool and wet start to summer.

Also, the link between more precipitation and El Niño really only holds for Southern California, while it is the northern half of the state where the main reservoirs, supplied by mountain snowpack, are situated.

No snowpack, no hay: In the northern Nevada, cattle feed is getting hard to come by, as sources of water diminish in supply.

With the Central Valley barren, underground aquifer drained, and Sierra snowpack entirely depleted, most «Mojavs,» prevented by both armed vigilantes and an indifferent bureaucracy from freely crossing borders to lusher regions, have allowed themselves to be evacuated to internment camps.

Fernie Alpine Resort boasts by far the deepest snowpack of any ski area in the Rockies, with an average nine metres of annual snowfall.

«If water from moist air condenses on a snowpack, 590 calories of heat are released by each gram of condensate.

Results show that anthropogenic warming reduced average snowpack levels by 25 %, with middle - to - low elevations experiencing reductions between 26 and 43 %

James Taylor of the Heartland Institute penned a Forbes article where he claimed that Christy's findings «refute frequent assertions by global warming alarmists that global warming is adversely affecting Sierra Nevada snowfall and snowpack.»

Accumulation is measured by either probing or crevasse stratigraphy to determine the annual snowpack thickness at many locations.

By early July snowpack beyond the glacier margins is limited, Snotel sites have lost their snowcover, and yet streamflow is still heavily dependent on snow and ice melt from glaciers (Fountain and Tangborn, 1985; Pelto, 1996).

A rise in precipitation and a fall in snowpack can only be accounted for by greater melting or rainfall during the winter.

2) Snowpack ablation from 1984 - 2002 on four glaciers (3 by NCGCP and 1 by USGS).

The Lyman Glacier monitored by the North Cascade Glacier Climate Project is three kilometers away and at 6400 feet the snowpack remains until early August the July - August melt rate is 5.6 cm / day.

April 1 snowpack at moderate elevations is assessed from seven long - term Snow Course and now SNOTEL stations; Rainy Pass, Lyman Lake, Stevens Pass, Miners Ridge, Stampede Pass and Park Creek and Fish Lake monitored by the USDA.

However, the average snowpack within a specific elevation band is determined by regional climate variations.

Snowpack ablation is reduced somewhat for the Snotel sites are that more protected by surrounding forest (Wells Creek and Thunder Basin).

High elevation snowpack is assessed from winter mass balance measurements on the South Cascade Glacier from 1960 - 2005 and on Easton Glacier 1990 - 2007 monitored by the North Cascade Glacier Climate Project.

They simulated winter warming by insulating vegetation with increased snowpack and summer warming by covering plants with open - topped greenhouses.

A new study reveales that the record low snowpack levels in the western-most region of the continental U.S. last 2015 were most likely caused by high temperature.

Attribution is supported by the detection of human influence on the cold - season temperatures that drive the snowpack reductions.

Species that live downslope will also be hurt by changes on mountaintops; the Sierra Nevada mountain yellow - legged frog, for example, depends on runoff from snowpack year - round to support its three - to four - year life stage as a tadpole, and earlier spring snowmelt runoff caused by global warming may leave this hardy, once - abundant creature high and dry in the summertime.