Posted on August 12, 2014 by Bob Berwyn
Hot and cold pattern persists
The yin and yang of climate, with hot readings in the far West and below-average temperatures the Midwest, along the Atlantic seaboard and the deep south. Map courtesy NCDC.
FRISCO — A hot-and-cold pattern continued over the continental U.S. in July, with some western states reporting record and near-record warmth, while parts of the Midwest were record cold for the month. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: climate change, Environment, global warming, July temperatures, U.S. climate statistics | 1 Comment »
Posted on May 4, 2014 by Bob Berwyn
Old Douglas firs can help reveal historic climate cycles.
Recent dry spells not so bad compared to past centuries
FRISCO — A tree-ring reconstruction of Utah’s climate going back to 1429 shows that the state has experienced several mega-droughts in past centuries that would be life-changing if they happen again, according to Brigham Young University professor Matthew Bekker.
The worst drought of the modern era, the 1930s Dust Bowl, barely ranks on the top 10 list of droughts in that 500-year span,” Bekker said. The findings reinforce similar studies for the Colorado River Basin. Continue reading
Filed under: climate and weather, Drought | Tagged: climate, drought, megadroughts, tree rings, Utah | 3 Comments »
Posted on April 19, 2014 by Bob Berwyn
Global warming seen as key factor in trend
Study documents significant trend in size and frequency of western wildfires.
Western wildfires: How much bigger will they get?
By Summit Voice
FRISCO — The size and frequency of western wildfires have been increasing at a startling rate the past few decades, researchers said this week after scrutinizing satellite data to measure burned areas.
The number of wildfires larger than 1,000 acres increased by a rate of seven fires a year from 1984 to 2011 and the total areas burned grew by about 90,000 acres per year — an area the size of Las Vegas, according to the new study accepted for publication in Geophysical Research Letters, a journal published by the American Geophysical Union.
“We looked at the probability that increases of this magnitude could be random, and in each case it was less than one percent,” said Philip Dennison, an associate professor of geography at the University of Utah in Salt Lake City and lead author of the paper. Continue reading
Filed under: climate and weather, Drought, Environment, extreme weather, forest fires, global warming | Tagged: climate, Environment, global warming, Wildfires | 1 Comment »
Posted on April 15, 2014 by Bob Berwyn
A NASA photo taken from the International Space Station shows sunlight glinting off the Amazon River.
Drought the main driver of destructive fires
By Staff Report
FRISCO — Longer droughts, land-use changes and wildfires may be pushing parts of the Amazon rainforest toward an ecological tipping point, a team of scientists said after analyzing the effects of fire in a series of study plots.
The changes may abruptly increase tree mortality and change vegetation over large areas, the researchers said, pointing out that current Amazon forest models don’t include the impacts of wildfires. As a result, projections of future forest health tend to underestimate the amount of tree death and overestimate overall forest health, said Dr. Michael Coe, of the Woods Hole Research Center. Continue reading
Filed under: climate and weather, Drought, Environment, global warming | Tagged: Amazon Rainforest, drought, Environment, Wildfires | Leave a comment »
Posted on April 3, 2014 by Bob Berwyn
Drought is expected to expand the southwestern U.S. and other regions.
Evaporation seen as huge factor in climate calculations
FRISCO — Increasing global temperatures will drive drought expansion regardless of precipitation in some cases, as more moisture evaporates from soils.
An increase in evaporative drying means that even regions expected to get more rain, including important wheat, corn and rice belts in the western United States and southeastern China, will be at risk of drought. The study excludes Antarctica.
The new study models the effects of both changing rainfall and evaporation rates on future drought, estimating that 12 percent of land will be subject to drought by 2100 through rainfall changes alone; but the drying will spread to 30 percent of land if higher evaporation rates from the added energy and humidity in the atmosphere is considered.
Filed under: climate and weather, Drought, global warming | Tagged: climate change, drought, global warming | Leave a comment »
Posted on March 17, 2014 by Bob Berwyn
Severe drought continues in Southwest
California, Arizona and New Mexico reporting very dry conditions.
By Summit VoiceFRISCO — Snowpack across the West is still somewhat of mixed bag in this no-Niño winter, but February storms did help bolster water supplies across the northern tier of states, according to the monthly update from USDA’s Natural Resources Conservation Service.
East of the Continental Divide as well as parts of Washington, northern Oregon, northern Idaho and western Montana are now forecast to have near-normal or above normal water supplies, according to the forecast from the NRCS National Water and Climate Center. Continue reading
Filed under: climate and weather, Colorado, Drought, extreme weather, global warming, Snow and weather | Tagged: climate, drought, stream flow forecasts, The West | 1 Comment »