Posted on April 11, 2015 by Bob Berwyn
‘This is a taste of what the ocean will be like in future decades’
Exceedingly high water temperatures in the eastern Pacific have persisted for several years, influencing weather across western North America and beyond.
FRISCO — Climate scientists have long known that the West has experienced significant long-term droughts during past millennia, but they don’t know exactly why. Understanding the cause may be more important now, given the huge impacts of the current drought in California, so researchers have been focusing on a huge mass of warm water hugging the West Coast.
Those conditions may be linked with a relatively unknown decadal weather pattern called the North Pacific Mode, which may be a significant weather driver, along with the El Niño-La Niño oscillation, and the Pacific Decadal Oscillation, according to the University of Washington’s Dennis Hartmann. Continue reading
Filed under: climate and weather, climate change, Drought, El Niño, extreme weather, global warming | Tagged: California drought, climate change, ENSO, North Pacific mode | Leave a comment »
Posted on April 10, 2015 by Bob Berwyn
Record low streamflows expected in many areas this summer
Precipitation for the 2015 water year- to-date is now below normal over most of the West except for some northwestern areas. The dry March has significantly affected this picture since a month ago, when far more of the West was near normal.
FRISCO —Federal water watchers say their April 1 readings show that precipitation thus far in the 2015 water year (beginning October 1, 2014) is now below normal over most of the West except for some northwestern areas and coastal Alaska.
Snowpack has declined significantly since last month throughout the West due to the warm and dry March. Only high- elevation areas in the Rocky Mountains and Interior Alaska retain somewhat near normal snowpack.
Streamflow forecasts have dropped since last month due to a lack of snow accumulation during March and an early snowmelt, with most regions now expecting below normal streamflow. Reservoir storage is currently below normal in the Southwest and Nevada, with near to above normal storage elsewhere. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: climate change, drought, extreme weather, global warming, streamflow forecast, Western United States | 1 Comment »
Posted on April 2, 2015 by Bob Berwyn
More information equals more conservation options
FRISCO — After issuing a general warning about the potential for widespread coral reef bleaching this year, federal scientists now say they have the ability to make more detailed projections about the timing and geographic distribution of such events.
The concerns this summer focus around emerging El Niño conditions, which could overheat parts of the world’s oceans that have already been hovering at near-record temperatures. Most coral reefs in the Caribbean and Gulf of Mexico will experience bleaching by mid-century, but if scientists can pinpoint the timing, it gives them more conservation options. Continue reading
Filed under: climate and weather, coral reefs, El Niño, global warming, ocean acidification | Tagged: Caribbean, climate change, coral reef bleaching, coral reefs, Environment, global warming | 1 Comment »
Posted on March 5, 2015 by Bob Berwyn
Impacts unclear, though Gulf Coast could see rain surplus
NOAA’s El Niño map shows widespread above-average sea surface temperatures.
FRISCO — A long overdue El Niño once anticipated as a potential drought-buster for California has emerged, but may not have a huge impact on North American weather.
Forecasters with NOAA’s Climate Prediction Center made the announcement this week after measuring ocean surface temperatures in the Pacific. Those temps have been running above average for several months but just now crossed the El Niño threshold. the climate experts said in their monthly outlook. Continue reading
Filed under: climate and weather, El Niño | Tagged: California drought, climate, El Nino, NOAA, weather | Leave a comment »
Posted on January 26, 2015 by Bob Berwyn
Will global warming intensify extreme weather swings?
How will climate change affect ENSO?
FRISCO — Global warming could increase the frequency of extreme La Niña events in the Pacific Ocean, with more droughts in southwestern United States, floods in the western Pacific regions and increased Atlantic hurricane activity.
The international study, published in Nature Climate Change, used advanced modeling to show how increased land-area heating, combined with more frequent El Niños, will feed a cycle of extreme La Niñas. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: climate science, El Nino, ENSO, extreme weather, global warming, La Niña | 1 Comment »
Posted on December 13, 2014 by Bob Berwyn
Last week’s Pacific storm dropped near-record rain
The video was created by NASA/NOAA’s GOES Project at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
FRISCO — A weekend storm rolling into Colorado won’t have a direct pineapple connection, but if the powder does pile up, it will be due to a big stream of moisture from the subtropical Pacific ocean that is wrapped into the approaching weather front.
As the National Oceanic and Atmospheric Administration described in a press release, the ‘Pineapple Express’’ happens when warm air and lots of moisture are transported from the Central Pacific, near Hawaii, to the Eastern Pacific Ocean. The above animation of satellite imagery from NOAA’s GOES-West satellite showed the stream of clouds associated with that moisture from Dec. 9 to Dec. 12, 2014 and brought rain and snow to the western U.S. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather | Tagged: California drought, climate, El Nino, extreme weather | 3 Comments »
Posted on October 16, 2014 by Bob Berwyn
The southern U.S., including parts of drought-hit Arizona, may see above-average precipitation this winter.
Climate experts say there’s good chance of average precipitation in California, but recovery will take a while
FRISCO — There may be some drought relief for California this winter, but the state won’t make up a huge moisture deficit in just one rainy season, federal climate scientists said this week, releasing their winter season outlook.
“Complete drought recovery in California this winter is highly unlikely,” said Mike Halpert, acting director of NOAA’s Climate Prediction Center.”While we’re predicting at least a 2 in 3 chance that winter precipitation will be near or above normal throughout the state, with such widespread, extreme deficits, recovery will be slow,” Halpert added. Continue reading
Filed under: agriculture, climate and weather, Drought, El Niño | Tagged: California drought, climate, El Nino, winter weather outlook | Leave a comment »