climate change – Page 67 – Desdemona Despair

Monthly evolution of global CO2 emissions in 2020, relative to 2019. After hitting a low in April 2020, global emissions rebounded strongly and rose above 2019 levels in December. Global CO2 emissions were 2 percent, or 60 million tonnes, higher in December 2020 than they were in the same month a year earlier. Major economies led the resurgence as a pick-up in economic activity pushed energy demand higher and significant policies measures to boost clean energy were lacking. Many economies are now seeing emissions climbing above pre-crisis levels. Graphic: IEA

March 27, 2021

After steep drop in early 2020, global carbon dioxide emissions have rebounded strongly – “The rebound in global carbon emissions is a stark warning that not enough is being done to accelerate clean energy transitions worldwide”

2 March 2021 (IEA) – The Covid-19 crisis in 2020 triggered the largest annual drop in global energy-related carbon dioxide emissions since the Second World War, according to IEA data released today, but the overall decline of about 6% masks wide variations depending on the region and the time of year. After hitting a low in […]

10,000 years of carbon dioxide. Due in large part to the burning of fossil fuels, carbon dioxide levels in the atmosphere have now risen by about 50 percent% above the preindustrial level. At recent rates of growth, we would reach double the preindustrial by around the year 2075. Graphic: Dr. Robert Rohde

March 21, 2021

Graph of the Day: 10,000 years of carbon dioxide

Dr. Robert Rohde 17 March 2021 (Twitter) – Due in large part to the burning of fossil fuels, carbon dioxide levels in the atmosphere have now risen about 50 percent above the preindustrial level. At recent rates of growth, we would reach double the preindustrial by around 2075. Dr. Robert Rohde on Twitter

Millennium-scale evolution of the Atlantic Meridional Overturning Circulation (AMOC), 400 - 2020. SST-based AMOC reconstructions (light and dark blue) compared to various proxy reconstructions, including land and sea surface temperature reconstructions, sortable silt data, δ18O in benthic foraminifera, δ15N of deep-sea gorgonian corals, and relative abundance of Turborotalita quinqueloba. Since at least 400 AD relatively stable, the AMOC began to decline during the 19th Century which is evident in all proxy records. Around 1950 a phase of particularly rapid decline started that is found in several, largely independent proxies. A short-lived recovery is evident in the 1990s before a return to decline from the mid-2000s. Together these data consistently show that the modern AMOC slowdown is unprecedented in over a thousand years. Graphic: Levke Caesar

March 21, 2021

Gulf Stream System at its weakest in more than a millennium – “This could bring us dangerously close to the tipping point at which the flow becomes unstable”

25 February 2021 (PIK) – Never before in over 1000 years the Atlantic Meridional Overturning Circulation (AMOC), also known as Gulf Stream System, has been as weak as in the last decades. This is the result of a new study by scientists from Ireland, Britain, and Germany. The researchers compiled so-called proxy data – taken […]

A before-and-after satellite view of flooding at Port Macquarie, captured by radar data from the European Union Earth Observation Programme's Sentinel-1 satellite on 12 March 2021 19 March 2021. Photo: Copernicus European Earth Observation Programme

March 21, 2021

Heavy rains in Australia’s east bring worst floods in 50 years – “Yesterday, we were hoping it will only be a one-in-20-year event, now it looks like a one-in-50-year event”

By Angus Thompson, Rachel Clun, and Lucy Cormack 21 March 2021 (Sydney Morning Herald) – The collision of two powerful weather systems over the east coast of NSW on Monday night may see more evacuations as western Sydney residents were forced to flee to higher ground on Sunday when floodwaters inundated their neighbourhoods. The State […]

Screenshot of the EPA Climate Change website, which was relaunched on 17 March 2021 after President Biden reversed the antiscience policies of the Trump administration. Graphic: EPA

March 21, 2021

EPA brings climate science back to website after Trump purge – “Climate facts are back”

By Richard Luscombe 20 March 2021 (The Guardian) – Canceled four years ago by a president who considered global warming a hoax, climate crisis information has returned to the website of the US government’s Environmental Protection Agency (EPA) as part of Joe Biden’s promise to “bring science back”. The revival of a page dedicated to the […]

Construction crews work on a section of Highway 1 which collapsed into the Pacific Ocean near Big Sur, California on 31 January 2021. Heavy rains caused debris flows of trees, boulders, and mud that washed out a 150-foot section of the road. Photo: Josh Edelson / AFP / Getty Images

March 8, 2021

Floods after wildfires are washing California’s Pacific Coast Highway into the ocean – “It was great while it lasted”

By Joel Shannon and Doyle Rice 2 March 2021 (USA TODAY) – Soaring mountains on one side of the road and the Pacific Ocean on the other: It was 1956 and Gary Griggs was experiencing California State Route 1 for the first time. He was a child, but in the following decades he would drive […]

A western monarch butterfly balances on a flower in Vista, California. The number of western monarch butterflies wintering along the California coast has plummeted to a record low. Photo: Gregory Bull / AP

March 7, 2021

Fewer butterflies seen across the warming, drying landscapes of the American West – Increasing fall temperatures may be a significant driver of declining butterfly populations

By Mike Wolterbeek 4 March 2021 (Nevada Today) – New methods of conservation and management of butterfly habitat may be needed to stem the consistent annual decline in the numbers of butterflies over the past 40 years in the western United States, according to a new study published in the journal Science. “The widespread butterfly […]

Ice drapes machinery at the Entergy power plant in Houston, Texas, after Winter Storm Uri, 16 February 2021. Photo: Lauren Talarico / KHOU / Twitter

March 7, 2021

Texas power coop seeks bankruptcy protection after Winter Storm Uri – “The consumer and the taxpayer are pretty much one and the same. Whether it comes out of your left pocket or out of your right pocket, it’s coming out of your pocket.”

By Michelle Chapman and David Koenig 1 March 2021 (AP) – The largest and oldest power cooperative in Texas is filing for bankruptcy protection, citing last month’s winter storm that left millions without power, and it is unlikely to be the last utility to seek shelter in the courts. Brazos Electric Power Cooperative serves distributors […]

Texas power grid load shedding in the early morning of 15 February 2021, 0123-0203. Up to an additional ∼24,000 MW net generation was unavailable due to extreme weather. Loss of generation was 52,277 MW (approximately 48.6 percent) at the highest point. Peak load shed was 20,000 MW. Most of the loss was caused by limited gas availability for gas-fired power plants. Graphic: ERCOT

March 1, 2021

Texas power grid failure during Winter Storm Uri mostly due to limited gas availability for gas-fired power plants

25 February 2021 (ERCOT) – [The following report is excerpted from the ERCOT slide presentation, Review of February 2021 Extreme Cold Weather Event (pdf), presented by ERCOT CEO Bill Magness to the Texas Senate Business and Commerce Committee House Joint Committee on State Affairs and Energy Resources on 25 February 2021. –Des] Overview of Cold […]

Forest degradation in the Monarch Butterfly Biosphere Reserve core area, 2002-2020. The presence of the Monarch butterfly in the Mexican hibernation forests decreased by 26 percent last December, occupying 2.10 hectares (ha) compared to the 2.83 hectares reported during the same month in 2019. Meanwhile, the core forest area in the Monarch Butterfly Biosphere Reserve (MBBR) where the lepidopteran establishes the main hibernation colonies recorded, between March 2019 and March 2020, 20.26 ha of degradation, four times more than in 2018-2019 when 5 ha were degraded. Graphic: WWF

February 28, 2021

Eastern Monarch butterfly population declined by 26 percent in 2020 – Degradation of temperate forests in the Monarch Butterfly Biosphere Reserve was four times higher than in 2019

By Wendy Caldwell 25 February 2021 MEXICO CITY (Monarch Joint Venture) – The presence of the Monarch butterfly in the Mexican hibernation forests decreased by 26 percent last December, occupying 2.10 hectares (ha) compared to the 2.83 ha reported during the same month in 2019. Meanwhile, the core forest area in the Monarch Butterfly Biosphere […]