Sentences with phrase «when snowpack»

Over time, there will be direct impacts — especially for the people living out West when the snowpack is gone.

Surprisingly, cloudy, gray and humid winter days can actually cause the snowpack to warm faster, increasing the likelihood of melt during winter months when the snowpack should be growing, the authors report.

Not exact matches

When the temperature beneath a layer of snow crystals is significantly higher than the temperature above, ice from crystals lower in the snowpack sublimes — that is, vaporizes directly without melting — and then refreezes onto overlying crystals.

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.

Depth hoar crystals are formed at the base of a snowpack when water vapor sublimates onto existing snow crystals.

Five times as much dust now falls on the snowpack in the Colorado Rockies as when the area was first heavily settled in the mid-19th century.

Rising temperatures are decimating snowpack, but when still frequent cold snaps hit, there's not enough insulation to protect the cedar's shallow roots so they die.

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.

«When snow first falls, snow grains are quite small, and as snowpack ages, and particularly for warmer snowpack, you get consolidation of those grains into larger clumps,» said Sarah Doherty, a researcher at the University of Washington who co-authored the paper.

However, it is expected that — given the combination of changes in precipitation variability, changed snowpack, and rising temperatures — future droughts will be more severe when they do occur.

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.

Most of the West's surface water comes from snowpack, which is declining as more precipitation falls as rain and snowpack melts earlier, leaving less water available for summer when it is needed most.

Snowfall varies across the region, comprising less than 10 % of total precipitation in the south, to more than half in the north, with as much as two inches of water available in the snowpack at the beginning of spring melt in the northern reaches of the river basins.81 When this amount of snowmelt is combined with heavy rainfall, the resulting flooding can be widespread and catastrophic (see «Cedar Rapids: A Tale of Vulnerability and Response»).82 Historical observations indicate declines in the frequency of high magnitude snowfall years over much of the Midwest, 83 but an increase in lake effect snowfall.61 These divergent trends and their inverse relationships with air temperatures make overall projections of regional impacts of the associated snowmelt extremely difficult.

January 2017 was a stark exception, when a strong El Niño flipped the ridge - trough pattern, dumping record - breaking rain and snowpack on California while the east enjoyed a mild month.

Extrapolation from site to site for accumulation can be accomplished, but only when the sites are at similar elevations and the sites have a baseline history documenting the specific development of snowpack..

The winter snowpack in mountainous regions such as the Himalayas, the Rockies, the Sierra, and the Andes is a most efficient reservoir, storing water through the cold months and releasing it gradually as snowmelt in warm months when farmers need it.

In addition to the precipitation, California saw a considerable increase in its snowpack, which will help keep the state out of drought conditions this spring and summer when it begins to melt.

How do you answer an 8 - year - old who asks that question, when Oregon's snowpack will be less than 50 % of what it is now within 4 decades if carbon emissions aren't cut quickly and substantially?

«With snowpack melting earlier in the year, that has a cascading effect on when the growing season of montane environments begins,» Woodburn said.

When the oceans are warm and the Arctic Sea Ice is melted is when it snows a lot and rebuilds the snowpacks and glaciers and cools the eaWhen the oceans are warm and the Arctic Sea Ice is melted is when it snows a lot and rebuilds the snowpacks and glaciers and cools the eawhen it snows a lot and rebuilds the snowpacks and glaciers and cools the earth.

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.

In particular, groundwater use increases during droughts when there is less water available in lakes, rivers, and mountain snowpack.

«As the climate warms up, now what we see is even when there is a pretty good snowpack, like we had last year, we don't get enough snowmelt runoff to make a huge impact on [Elephant Butte] reservoir,» which is the main area of storage for the Upper Rio Grande.

Such changes are observed in many places, especially over land in middle and high latitudes of the Northern Hemisphere, leading to increased rains but reduced snowpacks, and consequently diminished water resources in summer, when they are most needed.

«The first catastrophe occurred in 1989 when low winter snowpack led to an early and unusually synchronous adult emergence in April (as compared to the usual June flight).

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].