Tag Archives: nitrous oxide

Planet’s Vital Signs Are Reaching Dangerous ‘Tipping Points’ Amid Climate Crisis, Scientists Warn

“We need to stop treating the climate emergency as a stand-alone issue—global heating is not the sole symptom of our stressed Earth system.”

By Julia Conley, staff writer for Common Dreams. Published 7-28-2021

Human activity may be pushing the climate beyond dangerous ‘tipping points,’ say 14,000 scientists. As the extreme drought emergency continues in California, historically low water levels are visible at Lake Oroville on July 22, 2021 in Oroville, California. Photo: NOAA

More than a year after the Covid-19 pandemic shut down economies around the world and sharply reduced worldwide travel—sparking speculation among some that emissions would plummet as a result—a coalition of scientists said in a paper published Wednesday that the planet is nonetheless reaching multiple “tipping points,” with levels of sea ice melt, deforestation, and other markers revealing that urgent action is needed to mitigate the climate emergency.

“The extreme climate events and patterns that we’ve witnessed over the last several years — not to mention the last several weeks — highlight the heightened urgency with which we must address the climate crisis,” said Philip Duffy, co-author of the study and executive director of the Woodwell Climate Research Center in Massachusetts. Continue reading

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‘Biggest Story in the World Right Now’: Humanity Has Flipped Amazon From Carbon Sink to Source

The findings, said one expert, “show that the uncertain future is happening now.”

By Jessica Corbett, staff writer for Common Dreams. Published 7-14-2021

Fire in the Amazon. Photo: Luísa Mota/flickr/CC

Following years of warnings and mounting fears among scientists, “terrifying” research revealed Wednesday that climate change and deforestation have turned parts of the Amazon basin, a crucial “sink,” into a source of planet-heating carbon dioxide.

Though recent research has elevated concerns about the Amazon putting more CO2 and other greenhouse gases into the atmosphere than it absorbs, the new findings, published in the journal Nature, were presented as a “first” by scientists and climate reporters. Continue reading

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UN Chief Warns World on ‘Verge of the Abyss’ as WMO Releases Climate Report

The warning came alongside the release of the World Meteorological Organization’s State of the Global Climate in 2020, which said it was one of the three warmest years on record.

By Andrea Germanos, staff writer for Common Dreams. Published 4-19-2021

The CZU lightning complex fire burns along Butano Ridge and in Pescadero Creek Park, in the Santa Cruz Mountains, California. This fire would later grow to over 85,000 acres and destroy over 900 structures. Photo: Inklein/Wikimedia Commons

United Nations Secretary-General António Guterres warned Monday that humanity stands “on the verge of the abyss” as the climate crisis pushes the world “dangerously close” to hitting the 1.5 degree Celsius target limit of warming.

Guterres delivered the ominous remarks at the launch of the World Meteorological Organization’s (WMO) State of the Global Climate report—a publication he said “should alarm us all.” Continue reading

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Thawing Permafrost Emitting Higher Levels of Potent Greenhouse Gas Than Previously Thought: Study

Nitrous oxide is nearly 300 times more potent than carbon dioxide

By Jessica Corbett, staff writer for Common Dreams. Published 4-16-2019

Point Barrow, the northern-most location in the United States sits between the Chukchi Sea (west) and the Beaufort Sea on the east. (Photo: NASA/GSFC/Jeff Schmaltz/MODIS Land Rapid Response Team/Flickr)

As the Arctic enters an “unprecedented” state of warming, a new study shows that emissions of a potent greenhouse gas from thawing permafrost in the planet’s northernmost region may be 12 times higher than previously thought.

That’s according to a study published this month in the journal Atmospheric Chemistry and Physics. The paper’s findings add even more weight to scientists’ urgent warnings about the mounting threats of permafrost thaw. Continue reading

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Warnings of ‘Destructive and Irreversible Impacts’ as Greenhouse Gases Hit Highest Levels in 3-5 Million Years

“The science is clear,” says the head of the World Meteorological Organization. “The window of opportunity for action is almost closed.”

By Jessica Corbett, staff writer for Common Dreams. Published 11-22-2018

Atmospheric concentrations of planet-warming gases have hit record highs, according to a leading U.N. climate agency. (Photo: Tony Webster/Flickr/cc)

As communities most impacted by the climate crisis ramp up demands for urgent global action, atmospheric concentrations of the top three greenhouse gases driving global warming have hit record high levels, according to the World Meteorological Organization (WMO) out Thursday.”

Last year, as the latest WMO Greenhouse Gas Bulletin (pdf) details, average concentrations of carbon dioxide, methane, and nitrous oxide all rose—with CO2 hitting 405.5 parts per million (ppm), its highest level in a few million years.

The report also noted that there was a “resurgence of a potent greenhouse gas and ozone-depleting substance”—called trichlorofluoromethane, or CFC-11—likely tied to “increased emissions associated with production of CFC-11 in eastern Asia.” Continue reading

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