Category: climate and weather

Massive forest death continues in California

Latest survey tallies more than 100 milion dead trees

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A stand of pine-beetle killed lodgepole pines on the White River National Forest. @bberwyn photo.

Staff Report

California’s long-term drought has claimed another 36 million trees, the U.S. Forest Service said this week, announcing the results of a new aerial survey. Since 2010, more than 100 million trees have died across 7.7 million acres, the agency said.

The die-off intensified in 2016, after four years of drought,  with mortality increasing 100 percent. Millions of additional trees are weakened and expected to die in the coming months and years. Forest Service leaders once again emphasized that their ability to address safety issues linked with dead trees has been severely hampered by climate change and limited resources.

Agriculture Secretary Tom Vilsack said a broken budget for the Forest Service sees an increasing amount of resources going to firefighting while less is invested in restoration and forest health.  Continue reading “Massive forest death continues in California”

October ends up as 3d-warmest for Earth

Year-to-date still on record-breaking pace

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Record warmth has spanned the globe in 2016.

Staff Report

The average global temperature for October 2016 was 1.31 degrees Fahrenheit above the 20th century average, putting the month in a tie with 2003 for the third-warmest October on record.

Including 2016, the past three Octobers have been the three warmest in the historical record, but with the globe cooling down slightly from an El Niño heat surge, the monthly anomaly was the lowest deparature from average since Nov. 2014, according to the latest global monthly state of the climate report from the NOAA National Centers for Environmental Information. Continue reading “October ends up as 3d-warmest for Earth”

Can we #keepitintheground please?

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Roads and drill pads in the remote backcountry of eastern Utah. @bberwyn photo.

Conservation groups challenge planned fossil fuel leases on public lands in Colorado

Staff Report

Conservation groups are challenging the Bureau of Land Management’s plans to auction fossil fuel leases on 20,000 acres of public land in Colorado based on concerns about air and water pollution, and potential harm to imperiled species ­— including threatened Colorado River fish such as the Colorado pikeminnow and razorback sucker, and plant species such as the parachute beardtongue.

The administrative protest also says the BLM failed to consider climate impacts. If the leases are developed, it could result in 31. million tons of greenhouse gas emissions. Continue reading “Can we #keepitintheground please?”

Sunday set: Eyes wide open

Warning signs …

By Bob Berwyn

The Summit Voice Sunday Set is  set aside for scenic landscape shots or nature photo essays, which is usually a nice break from the previous week’s news. But today we have a public service announcement instead. Travel as we know it is threatened by a rising tide of right-wing, nationalistic populism around the world.

Living in the new political post-factual, post-truth era is going to require journalists to take their game to a much higher level if they want to regain credibility with readers who have come to distrust any source outside their immediate cybernews bubble. Travel writers could be a big part of the much-needed journalism revival. Nobody is in a better position to help show how interconnected the world has become in the past few decades. It’s an illusion to think that what happens in one country won’t affect many others. Continue reading “Sunday set: Eyes wide open”

Climate: Sea ice at both poles way below average

Antarctic sea ice retreat could set stage for ice shelf collapses

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Melting Greenland glaciers in September 2015, photographed from a passenger jet. @bberwyn photo.

Staff ReportMonths of above-average temperatures in the Arctic slowed the growth of sea ice formation to a crawl during the second half of October, the National Snow and Ice Data Center reported in its latest monthly update.The ice scientists said that, starting Oct. 20, Arctic sea ice started setting daily record lows for extent.  After mid-October, ice growth returned to near-average rates, but extent remained at record low levels through late October. Both sea surface and air temperatures have remained unusually high, extending from the surface high up into the atmosphere. Continue reading “Climate: Sea ice at both poles way below average”

Earth’s plants are soaking up more of our CO2 these days

Study suggests carbon uptake by forests has doubled since the 1950s

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Forests have doubled their CO2 uptake since the 1950s, a new study says. @bberwyn photo.

Staff Report

Scientists say they’ve place yet another piece in the complex global plant-carbon cycle, with a new study suggested that atmospheric CO2 levels have plateaued in recent years because forests and grasslands are removing more of the heat-trapping gas. The research was led by a scientist with the Department of Energy’s Lawrence Berkeley National Laboratory .

Fossil fuel burning and other human activities continue to emit increasing amounts of carbon, but the study found that, between 2002 and 2014, the rate at which CO2 increased in the atmosphere held steady at about 1.9 parts per million annually. Continue reading “Earth’s plants are soaking up more of our CO2 these days”

Global hot streak continues in October

No let up in global warming spiral, especially in the Arctic

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Surface air temperature anomaly for October 2016 relative to the October average for the period 1981-2010. Source: ERA-Interim. (Credit: ECMWF, Copernicus Climate Change Service)

Staff Report

The average global temperature for October 2016 was 0.57 degrees Celsius above the 1981 to 2010 average, continuing a spell of “exceptional global warmth that has now lasted more than a year, according to the European Climate Change Service.

Global temperature anomalies topped out in February with the peak of El Niño, then declined in spring and rose again in summer, declining only slightly in September. The October departure from normal was only slightly lower in October,  just 0.07 degrees Celsius under the all-time record for the month, set just last year.

With the exception of June, each month from October 2015 to October 2016 has been more extreme than January 2007, which was previously the month with the warmest anomaly. Each month from August 2015 to September 2016 successively became the warmest on record for that particular month.

October 2016 was cooler than the 1981-2010 average over much of Europe, but warmer than average in the far north of the continent and over the Iberian Peninsula and Mediterranean.  Well-above normal temperatures also occurred over the USA and parts of Africa. Temperatures were most above normal over much of the Arctic and Antarctic, with record-low sea extent in both regions.

Temperatures were below average along the equator over the eastern Pacific Ocean, indicating weak La Niña conditions, over some oceanic regions of the southern hemisphere and over part of the North Atlantic. Other land areas with below-average temperatures include most of Australia, western and north-eastern Canada and much of the southern half of South America. The zone of below-average temperatures bounded north and south by above-average temperatures extended eastwards across Asia.

Averaging over twelve-month periods smooths out the shorter-term variations. Globally, the warmest twelve-month period on record is from October 2015 to September 2016, with a temperature 0.64 degrees Celsius above the 1981-2010 average.

Uncertainty in the global value is relatively high for the year 2005, but there is agreement between various datasets regarding:

  • the exceptional warmth of 2016, and to a lesser extent 2015;
  • the overall rate of warming since the late 1970s;
  • the sustained period of above-average values from 2001 onwards.

There is more variability in average European temperatures, but values are less uncertain because observational coverage of the continent is relatively dense. Twelve-month averages for Europe have been at a persistently high level for the last three years or so. They are nevertheless lower than the averages from around the middle of 2006 to the middle of 2007.