The lack of snowfall and
snowpack for the winter of 2011/2012 and the following spring was a precursor to the large drought episode that impacted two - thirds of the nation during the following summer and autumn.
I live in California where we rely on the winter
snowpack for summer water.
With cooperation from Mother Nature, we usually have a healthy
snowpack for great skiing through mid...
According to the Open Snow website «Multiple storms hit the west coast and Pacific Northwest during the first half of October, which has resulted in a healthy
snowpack for this time of the year».
For Immediate Release: October 21st, 2016 Northwest off to a snowy start for the upcoming ski season According to the Open Snow website «Multiple storms hit the west coast and Pacific Northwest during the first half of October, which has resulted in a healthy
snowpack for this time of the year».
NASA airborne science instruments such as the JPL - managed Airborne Snow Observatory and the SnowEx field campaign in the western United States, which includes JPL participation, seek to better understand and better measure how much water is held in snow cover, a critical fact for this region where one in six people rely on
snowpack for water.
The snow readings are important during this time of the year, as several locations depend on the meltwater from
that snowpack for drinking
The snow readings are important during this time of the year, as several locations depend on the meltwater from
that snowpack for drinking water and irrigation through the drier and hotter summer months.
Even in the rainy Pacific Northwest, we depend on yearly
snowpack for drinking water and healthy river flows for fish, said Rolf Gersonde, who designs and implements forest restoration projects in the Cedar River Watershed.
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.
They rely on melting mountain
snowpack for their water in the parched summer months.
Not exact matches
At a low - key night slalom race on Jan. 17 in Westendorf, Austria, Miller stood
for two hours on a frigid
snowpack, signing autographs and posing
for pictures.
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.
Mote said
snowpack levels in most of the western U.S.
for 2017 - 18 thus far are lower than average — a function of continued warming temperatures and the presence of a La Niña event, which typically results in warmer and drier conditions in most southwestern states.
The year 2015 was the warmest on record
for Oregon, resulting in low
snowpacks and less water in many lakes and rivers.
Nevada and other Western states like California and Arizona are already struggling with the problem of diminishing
snowpack in their own states, and rely on the Colorado River
for much - needed water.
«This extreme variability is increasingly imprinted on these freshwater, terrestrial, and marine systems, and this has caused them to become more synchronous with one another with a number of implications
for fisheries, drought,
snowpack, and tree growth.»
Researchers have evaluated different mechanisms that could account
for declining
snowpack in a warming world: earlier onset of snowmelt, a change in melt rates and shifts from snow to rain under certain conditions.
But
for the past 30 years or so,
snowpack in both regions has shrunk.
Their work, published yesterday in the journal Science, suggests that the plummeting
snowpack could have serious consequences
for more than 70 million people who depend on water from the runoff - fed Columbia, Colorado and Missouri rivers.
As
for the
snowpack, the models show it decreasing by at least 30 percent.
Like all giant sequoias, these five have a short growing season and depend on melting
snowpack from the Sierra Nevada mountains
for many months of the year.
Levels of
snowpack are 12 percent of average
for this time of year, down from 20 percent on Jan. 3 (E&EN ews PM, Jan. 3).
«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.
«The hope is that this paper gives us more of a global framework
for how we manage our forests to conserve
snowpack.»
«While reduced
snowpack has been predicted
for some time, they find that the shift toward low snow years and increasing water stress in the Northern Hemisphere is «imminent,»» said Andrew Fahlund, executive director of the Water in the West program at Stanford.
Warmer global temperatures will lead to shallower
snowpack in many mountainous areas, says Keith Musselman, a hydrologist at the National Center
for Atmospheric Research in Boulder, Colorado.
Current infrastructure was built
for a
snowpack and water runoff system that the study predicts won't exist in the years to come, he said.
The study examined what is likely to be seen in terms of precipitation,
snowpack accumulation and water runoff over the next century, versus the same data
for the years from 1976 and 2005.
Right now, the researchers are able to develop a monthly average
for snowpack about 10 days after the end of the month.
The terrible
snowpack and low reservoir levels prompted Gov. Jerry Brown in April to call
for the first statewide mandatory water restrictions
for cities and towns.
More accurate information about
snowpack can help these managers and hydrologists plan
for how to fill reservoirs, how much water they might have available during the dry season and how dry the soils might be during fire season.
It needs to be clarified here, that it is hypothetically possible to get more snowfall and
snowpack in a globally warming world (at least
for a while), due to increased precipitation (which is predicted in a warming world, esp
for the higher latitudes) coming down as snow.
Then, add to that reality the fact that nearly 400 million people rely, to some degree, on Himalayan
snowpack and glacier melt to feed the Ganges and Brahmaputra Rivers which provide irrigation and drinking water
for the heavily populated lands surrounding northern India.
Snowpack is at 6 percent of normal
for this time of year with the southern and central Sierra Nevada mountains registering a goose egg in terms of snow on the ground.
Warming temperatures in the region are a major concern
for water resources, as eastern Washington depends on its winter
snowpack to supply reservoirs and streams come the warmer summer months.
Are there estimates of
snowpack * variability * in addition to the trend,
for the Cascades or parts of the Cascades?
For this reason, most cities stick with traditional sources of freshwater, such as underground aquifers, rivers, lakes, and runoff from
snowpack.
At the end of March drought remained entrenched in the western United States, where mountain
snowpack was record low
for many locations in the Cascade and Sierra Nevada Mountains.
A warming climate will strongly influence Montana's
snowpack, streamflow dynamics, and groundwater resources, with far - reaching consequences
for social and ecological systems.
For example, the Pacific Decadal Oscillation was in a negative phase between approximately 1960 - 1980, leading to above average
snowpack across the state.
For example, below - average winter precipitation can lead to smaller mountain
snowpack volumes, which tend to result in shorter duration spring runoff (Hamlet and Lettenmaier 1999; Stewart et al. 2004; Moore et al. 2007; Whitfield 2013).
For example, Mote and Sharp (2016) showed that western Montana and the Pacific Northwest have experienced the most drastic declines in
snowpack volume in the West over the past 80 yr.
Conversely, particularly high -
snowpack years may effectively compensate
for warming temperatures by offsetting rapid snowmelt.
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).
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.
The assessments in this chapter are based on the climate trends
for which we had sufficient data and climate projections that represent plausible future scenarios, as described in the Climate chapter of this assessment (see Water chapter
for snowpack trends and projections) and summarized in Table 4 - 1.
Alaska had paltry
snowpack that quickly disappeared, thanks to the second - warmest spring on record
for the state.
Neil Berg, associate director of UCLA's Center
for Climate Science, was lead author of the study on
snowpack during drought.
Efforts have begun to improve the management of water stored in the state's underground aquifers, which could help compensate
for its loss of
snowpack storage.