Mexico sets ambitious goal for greenhouse gas cuts

asDF

A snapshot of per capita greenhouse gas emissions.

Climate pledge includes a 2026 peak for emissions

Staff Report

FRISCO — Climate activists today hailed Mexico’s commitment to reduce greenhouse gas emissions as an important milestone leading up to a hoped-for global climate deal later this year.

On the path to that agreement, a March 31 deadline looms for individual countries to make their emissions reductions targets known, and Mexico became the first emerging economy to commit to reducing greenhouse gases after 2020. Read Mexico’s pledge here. Continue reading

Report shows growing impacts of ocean acidification

CU-Boulder scientists study document decline of calcification rates in marine organisms around Antarctica

kjh

The Southern Ocean may lose its ability to function as a carbon sink. bberwyn photo.

Staff Report

*More Summit Voice stories on ocean acidification

FRISCO — The steady increase of atmospheric carbon dioxide is already causing large-scale shifts in the ocean carbon cycle, according to University of Colorado, Boulder scientists, who calculated the calcification rate of marine organisms in the Southern Ocean.

According to the scientists there has been a 24 percent decline in the amount of calcium carbonate produced in large areas of the Southern Ocean over the past 17 years. Continue reading

Environment: EPA reports steady gains in auto fuel efficiency

Red ... white & blue.

U.S. automakers make progress on cutting emissions, the EPA says. bberwyn photo.

Overall average fleet efficiency at 24.1 miles per gallon

Staff Report

FRISCO — Automakers are stepping up the pace on reducing emissions, according to the EPA, which this week released a report showing that the industry overall outperformed the national greenhouse gas emissions standards by a wide margin for the second year in a row.

Compliance for model year 2013 was 1.4 miles per gallon better than required by the 2013 standard. The report presents detailed information about how individual firms are complying with GHG emissions standards for cars and light trucks.  Continue reading

Global warming: in the realm of 400 ppm atmospheric CO2

Scientists: ‘Climate change is a threat to life on Earth and we can no longer afford to be spectators’

'oj

A rising tide of CO2 …

Staff Report

FRISCO — When atmospheric carbon dioxide concentrations hit 400 parts per million about a year ago, there was widespread media coverage, explaining how the mark wasn’t all that significant in and of itself, but that it represented a psychological threshold to measure human impact on the climate.

Well guess what? CO2 emissions continue unabated, although there are some hopeful signs (global energy production increased in 2014, but CO2 emissions leveled off), and once again this spring, the atmospheric observatory atop Mauna Loa is once again measuring CO2 above the 400 ppm level — 401.77, to be exact, as of March 22, and as high as 403.10 ppm back on March 15. Continue reading

Global warming: ‘You will feel the changes’

Study looks at temperature increases on a decadal scale

;ih

How hot will it be when your kids grow up?

Staff Report

FRISCO — While most global warming studies project temperatures over the course of centuries, a new research effort aimed to show how conditions will change in the span of a few decades, a chunk of time that people can relate to.

By comparing historic changes with today’s rate of global warming, the researchers found the climate to be warming faster than at any other time during the past thousand years, and accelerating. The findings were published in Nature Climate Change. They show that the unchecked emissions of greenhouse gases is committing people to live through and adapt to a warming world. Continue reading

Climate: Is the California drought the new norm?

dfg

California’s withering drought continues.

Study shows how global warming may very well lead to semi-permanent drought by mid-century

Staff Report

FRISCO — California’s crippling drought may be the new norm, according to scientists who studied the link between greenhouse gases, rising temperatures and multi-year period of record warmth and dryness.

The new study by Stanford researchers found that the worst droughts in California have historically occurred when conditions were both dry and warm, and that global warming is increasing the probability that dry and warm years will coincide.

The findings suggest that California could be entering an era when nearly every year that has low precipitation also has temperatures similar to or higher than 2013-2014, when the statewide average annual temperature was the warmest on record. The study was published in the March 2 issue of the journal of the Proceedings of the National Academy of Sciences. Continue reading

New study takes nuanced look at methane leaks

In some gas fields, leak rates appear close to official estimates

Fracked nation.

Researchers try to quantify methane leakage in natural gas fields.

Staff Report

FRISCO — Boulder-based researchers have used thousands of detailed measurements taken during overflights to take a nuanced look at methane leaks from natural gas fields.

The findings show methane leaking at the rate of tens of thousands of pounds per hour in three major natural gas basins that span Texas, Louisiana, Arkansas and Pennsylvania. But the overall leak rate from those basins is only about one percent of gas production there — lower than leak rates measured in other gas fields, and in line with federal estimates. Continue reading

Follow

Get every new post delivered to your Inbox.

Join 8,502 other followers