Posted on November 19, 2015 by Bob Berwyn
A NASA Earth Observatory satellite image shows swollen rivers in northwestern Australia during record-setting floods in 2010-2011. Visit this NASA page for more info.
‘Take action to forestall global warming …’
Deadly floods that swept across Australia in 2010 and 2011 were at least partly fueled by long-term warming in the Indian and Pacific oceans, according to a new study that highlights some of threats posed by human-caused climate change.
The research, published in Geophysical Research Letters, shows that ocean warming can have profound effects on atmospheric circulation, delivering huge amounts of moisture to land areas under certain conditions. Continue reading
Filed under: climate and weather, El Niño, global warming, La Niña | Tagged: Australia, climate change, extreme weather, flooding, global warming | Leave a comment »
Posted on November 5, 2015 by Bob Berwyn
Extreme weather, coming to you, thanks to global warming
Climate and weather experts say some of 2014’s extreme weather events can be linked with human activities, including the global warming caused by greenhouse gases.
In a report released this week, researchers specifically identified tropical cyclones in the central Pacific, heavy rainfall in Europe, drought in East Africa, and stifling heat waves in Australia, Asia, and South America with human activities.
“For each of the past four years, this report has demonstrated that individual events, like temperature extremes, have often been shown to be linked to additional atmospheric greenhouse gases caused by human activities, while other extremes, such as those that are precipitation related, are less likely to be convincingly linked to human activities,” said Thomas R. Karl, L.H.D., director of NOAA’s National Centers for Environmental Information. Continue reading
Filed under: climate and weather, Drought, El Niño, global warming | Tagged: climate attribution studies, climate change, extreme weather, global warming | Leave a comment »
Posted on October 25, 2015 by Bob Berwyn
Flash floods in October scoured roads and bridges from the landscape in Death Valley National Park. Photo courtesy National Park Service.
Autumn tourism affected by road damage, but many attractions still open
A series of El Niño-fueled storms in October ravaged parts of Death Valley with floods and mudslides, leading to serious road damage and impacting other park resources, including Devils Hole, a spring that’s home to endangered fish.
According to the National Park Service, flash floods heavily damaged historic structures at Scottys Castle. In a press release, the park service floods pushed over a wall and buried some buildings with about five feet of mud.
The park often sees weather extremes, including flash flooding, but geologists said October’s events were near the edge of the historic envelope. Continue reading
Filed under: climate and weather, El Niño, extreme weather, global warming, national parks, public lands | Tagged: Death Valley, El Nino, extreme weather, flash floods, public lands | Leave a comment »
Posted on October 24, 2015 by Bob Berwyn
More drought, more flooding …
An intensifying El Niño cycle could affect California weather.
The Pacific Ocean’s El Niño-La Niña cycle may become a dominant factor in West Coast weather by the end of this century and lead to more frequent weather extremes, according to a new study published in Nature Communications. Based on the findings, California could see the number of extreme droughts and floods by 2100, the researchers found.
A better understanding of what gives rise to El Nino and La Nina cycles — together known as El Nino-Southern Oscillation — might help California predict and prepare for more frequent droughts and floods in the coming century. Continue reading
Filed under: climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: California, climate change, drought, El Nino, extreme weather, flooding | Leave a comment »
Posted on September 17, 2015 by Bob Berwyn
Colorado recorded the greatest increase in average maximum temperatures — between .7 and .9 degrees — from the old normals, compiled between 1971 and 2000, and the new normals, which are based on temperature readings between 1981 and 2010. On average across the U.S., the new average temperatures are about .5 degrees warmer.
Multiple state agencies will eye adaptation, mitigation strategies
Colorado’s new climate plan calls for an all-hands-on-deck approach, with various state agencies working together, and with the public, to address the potential impacts of rising temperatures.
Acknowledging that average temperatures in the state could rise by as much as 2.5 to 5 degrees Celsius in the next few decades, Gov. John Hickenlooper called on Colorado make preparations now.
“Colorado is facing a potential increase in both the number and severity of extreme weather events,” Hickenlooper said in a prepared statement. “We’ve seen what Mother Nature can do, and additional risks present a considerable set of challenges for the state, our residents, and our way of life. This comprehensive plan puts forth our commitment from the state and sets the groundwork for the collaboration needed to make sure Colorado is prepared.”
Filed under: climate and weather, Colorado, Drought, Environment, extreme weather, global warming | Tagged: climate change, Colorado climate plan, drought, extreme weather, global warming, Gov. John Hickenlooper, water | 2 Comments »
Posted on September 15, 2015 by Bob Berwyn
‘This is a new planet’
El Niño still strengthening in the Pacific.
LINZ — This year’s strong El Niño may be a climate wildcard, according to experts with the World Meteorological Organization, who said changes in the northern hemisphere’s climate may interact with El Niño in as-yet unknown ways.
“The last big El Niño was 1997-1998. The planet has changed a lot in 15 years,” said David Carlson, director of the WMO co-sponsored World Climate Research Programme. “We have had years of record Arctic sea ice minimum. We have lost a massive area of northern hemisphere snow cover, probably by more than 1 million square kilometers in the past 15 years. We are working on a different planet and we fully do not understand the new patterns emerging.”
He said the 2015 El Niño is unique because of the unprecedented combination of the Equatorial influence of El Niño, and the Arctic influence of low sea ice and snow cover in place at the same time.
“This is a new planet,” said David Carlson, director of the WMO co-sponsored World Climate Research Programme. The 2015 El Niño is the first to take place since the rapid melting of Arctic sea ice and snow cover, Carlson said. Continue reading
Filed under: Arctic, climate and weather, Drought, El Niño, extreme weather, global warming | Tagged: climate change, El Nino, extreme weather, global warming | 1 Comment »
Posted on September 1, 2015 by Bob Berwyn
High temperatures and a lack of rain spread serious drought conditions across Europe this summer.
Study tracks increase in extreme conditions
FRISCO — Scientists taking a close look at the last 50 years — the modern global warming era — found that droughts and heat waves are happening simultaneously much more frequently than in the past.
The climate experts at the University of California, Irvine analyzed data gathered from ground sensors and gauges since 1960 and crunched the numbers with a statistical model to track the upswing.
“Heat waves can kill people and crops while worsening air quality, and droughts exacerbate those serious impacts,” said senior author Amir AghaKouchak, assistant professor of civil & environmental engineering. “With these two extremes happening at the same time, the threat is far more significant.” Continue reading
Filed under: climate and weather, Drought, extreme weather, global warming | Tagged: air quality, climate change, drought, extreme weather, health, heatwaves | 1 Comment »