Projected (a) mean winter (Oct-April) soil temperature, (b) mean winter air temperature, (c) mean leaf area index (July-August), (d) annual gross primary productivity (GPP), (e) mean non-summer (NS; September - May) unfrozen soil moisture, (f) mean summer soil moisture (June-August), and (g) cumulative summer precipitation (June-August) for the northern permafrost region from 2018 through 2100 under RCP 4.5 (blue) and 8.5 (red) based on ESM ensemble outputs. Graphic: Natali, et al., 2019 / Nature Climate Change

Arctic shifts to a carbon source due to winter soil emissions – “The warmer it gets, the more carbon will be released into the atmosphere from the permafrost region, which will add to further warming”

By Samson Reiny 8 November 2019 (NASA) – A NASA-funded study suggests winter carbon emissions in the Arctic may be adding more carbon into the atmosphere each year than is taken up by Arctic vegetation, marking a stark reversal for a region that has captured and stored carbon for tens of thousands of years. The […]

Trump holds an early projection map of Hurricane Dorian in the Oval Office on 4 September 2019. The projected path of the hurricane has been extended into Alabama with a Sharpie pen, almost certainly by Trump himself. Photo: Jonathan Ernst / Reuters

Internal NOAA emails detail blowback to Trump attacks on hurricane weather forecasters: “This has really gotten out of hand”

By Allan Smith 7 November 2019 (NBC News) – Internal emails at the National Oceanic and Atmospheric Administration released Thursday showed how the agency scrambled to respond to President Donald Trump’s inaccurate claims about Hurricane Dorian and Alabama. The emails, dozens of which were obtained by NBC News in response to a Freedom of Information Act request, […]

A firefighter passes a burning home as the Hillside fire burns in San Bernardino, California, on Thursday, 31 October 2019. The blaze, which ignited during red flag fire danger warnings, destroyed multiple residences. Photo: Noah Berger / AP Photo

California is becoming unlivable – Wildfires and lack of affordable housing exacerbate each other

By Annie Lowrey 30 October 2019 (The Atlantic) – Right now, wildfires are scorching tens of thousands of acres in California, choking the air with smoke, spurring widespread prophylactic blackouts, and forcing the evacuation of hundreds of thousands of people. Right now, roughly 130,000 Californians are homeless, and millions more are shelling out far more in […]

Country-specific total CO2 emission shares GtC per year of the biggest 5 emitters. Graphic: Nauels, et al., 2019 / PNAS

Just 15 years of post-Paris emissions to lock in 20 cm of sea level rise in the year 2300 – “Emissions today will inevitably cause seas to rise a long way into the future. This process cannot be reversed. It is our legacy for humankind.”

5 November 2019 (PIK) – Unless governments significantly scale up their emission reduction efforts, the 15 years’ worth of emissions released under their current Paris Agreement pledges alone would cause 20 cm of sea-level rise over the longer term, according to new research published today in the Proceedings of the National Academy of Sciences (PNAS). […]

A house burns in the Kincade Fire on 23 October 2019 as a metal sculpture of an animal looks on. Photo: Carlos Avila Gonzalez / SF Chronicle

U.S. formally begins to leave the Paris climate agreement

By Rebecca Hersher 4 November 2019 (NPR) – The Trump administration has formally notified the United Nations that the U.S. is withdrawing from the Paris climate agreement. The withdrawal will be complete this time next year, after a one-year waiting period has elapsed. “We will continue to work with our global partners to enhance resilience […]

Shell’s “cracker” plant under construction in Pennsylvania. Photo: Keith Srakocic / AP

Will a push for plastics turn Appalachia into next “Cancer Alley”? – “It’s so obvious that they are trying to lock us into fossil fuels”

By Emily Holden 11 October 2019 MONACA, Pennsylvania (The Guardian) – Construction cranes climb into the sky and sprawl across the massive petrochemical facility that will turn a byproduct of fracked gas into plastic on the banks of the Ohio River, just outside Pittsburgh. Even at a distance, from the car park of a cancer […]

Comparison of weekly U.S. Drought Monitor for 30 July 2019 and 1 October 2019 shows the rapid progression of drought across the south-central and southeast U.S. Graph: National Drought Mitigation Center

October 2019: A month of extreme weather for the U.S. – “This early-October heat wave appears to the most intense and anomalous on record for such a large region of the U.S.”

By Christopher C. Burt 1 November 2019 (Weather Underground) – October is a month of transition weatherwise for the contiguous U.S. Some years it is a gentle transition from early fall to late fall, and some years an extreme transition from late summer to early winter—as has been the case this year. In fact, it […]

Logo of the investment firm, DeltaTerra Capital. Graphic: DeltaTerra Capital

“Big Short” investor David Burt’s new bet: Global warming will bust the housing market – “You end up with a very scary looking situation”

By Geoff Dembicki 1 November 2019 (Vice) – In 2007, almost no one would admit what became obvious in hindsight: The housing market was on the brink of collapse and would take a good chunk of the U.S. economy along with it. Lenders were getting rich, giving home loans to people who couldn’t afford them, investment banks […]

Portrait of Dr. Katharine Hayhoe, atmospheric scientist and professor of political science at Texas Tech University. Photo: Katharine Hayhoe

Dr. Katharine Hayhoe: I’m a climate scientist who believes in God. Hear me out. – Global warming will strike hardest against the very people we’re told to love: the poor and vulnerable

By Katharine Hayhoe 31 October 2019 (The New York Times) – I’m a climate scientist. I’m also an evangelical Christian. And I’m Canadian, which is why it took me so long to realize the first two things were supposed to be entirely incompatible. I grew up in a Christian family with a science-teacher dad who […]

Summary of polar bear population status in 2019 by regional subpopulation, showing populations with decreasing trends. Graphic: IUCN / SSC Polar Bear Specialist Group (PBSG)

Scientists update status of polar bear populations with 2019 data

By Dag Vongraven 20 September 2019 (PBSG) – At the last meeting of the IUCN/SSC Polar Bear Specialist Group (PBSG) in Anchorage in 2016, the group agreed that there was a need for new and documented criteria for the assessment of status and trends of polar bear populations. Work to develop a new set of […]

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