Limiting warming using solar geoengineering is a 100 year plus commitment, new study
New peer reviewed research shows that if solar radiation management – where higher amounts of sunlight are reflected back to space through artificially altering either the Earth’s surface or the atmosphere – is deployed to limit warming to 1.5°C without emissions cuts beyond those currently envisioned by governments, it would have to be maintained for at least a hundred years.
Over 350 emission scenarios are considered in the study that extrapolates emissions from 2030 out to 2500 based on the governments’ current climate targets. Most of the scenarios see solar radiation management deployed for 150-300 years. No scenario consistent with current targets sees it deployed for less than 100 years.
“Other studies have laid out additional risks from reliance on such technologies, like termination shock and governance challenges. Our paper adds a perspective on the length of deployment, showing that it would be a multi-generational commitment,” commented lead author Susanne Baur based at CERFACS in Toulouse.
“We would be forcing our children and their descendants to maintain a technological regime that if suddenly stopped, could be an existential threat for the planet,” she added.
The time frames set out in the paper are much longer than the carbon dioxide removal deployment lengths in 1.5°C pathways in the Intergovernmental Panel on Climate Change’s AR6 Working Group III report.
“We see that it’s a far larger commitment than scaling carbon dioxide removal to the levels needed for 1.5°C,” said Dr. Alexander Nauels, another author on the paper from research institute Climate Analytics.
“It should also be mentioned that solar radiation management would do little to combat other symptoms of large amounts of CO2 in the atmosphere, like ocean acidification, which has huge ramifications for both ecosystems and the livelihoods that depend on them“, he added.
Carbon capture and storage could unleash 86 billion tonne carbon bomb
A new analysis finds reliance on carbon capture and storage could release an extra 86 billion tonnes of greenhouse gases into the atmosphere between 2020 and 2050.
Projected warming almost unchanged for two years as governments push false solutions over climate action
Despite their promises, governments have not taken enough action to drive down warming projections, with some instead turning to false solutions such as carbon capture and storage to continue the world's reliance on fossil fuels, according to the Climate Action Tracker's annual warming update.
Oil and gas majors could have paid for their share of climate loss and damage and still earned 10 trillion USD: new report
Global climate damages from emissions associated with the top 25 oil and gas ‘carbon majors’ between 1985 and 2018 are estimated at 20 trillion USD compared to the 30 trillion USD they earned over the same period, according to a new report released today by international think tank Climate Analytics.
A 1.5˚C pathway for the Philippines power sector entirely feasible: analysis
With the right international funding and policies in place, the Philippines could transition its’ power sector to near-100% renewable energy without compromising on the costs of electricity, reducing its reliance on expensive imports of both coal and gas, and creating up to a million jobs by 2050.
State of Climate Action report finds progress lags on every measure except EV sales
Global efforts to limit warming to 1.5°C are failing across the board, with recent progress made on every indicator — except electric passenger car sales — lagging significantly behind the pace and scale that is necessary to address the climate crisis.
Governments plan to produce double the fossil fuels in 2030 than the 1.5°C warming limit allows
The Production Gap Report finds governments plan to produce around 110% more fossil fuels in 2030 than would be consistent with limiting warming to 1.5°C, and 69% more than would be consistent with 2°C.
Beetaloo fracking and Middle Arm emissions wildly underestimated: analysis
An independent analysis of the projected emissions from the Northern Territory's proposed Beetaloo Basin gas fracking project — and the associated Middle Arm LNG precinct in Darwin Harbour — has found they've been gravely underestimated, as have the availability of offsets to deal with them.
Comic artists respond to the climate crisis
Three leading comic creators have collaborated with the Horizon Europe project, CONSTRAIN, to develop comics exploring the climate change challenge.
Adelle Thomas elected as Vice-Chair of the IPCC's Impacts, Adaptation and Vulnerability group
Dr. Adelle Thomas elected as Vice-Chair of the IPCC's Working Group II contribution on on Impacts, Adaptation and Vulnerability for the seventh assessment report cycle
Changes to the jet stream could trigger simultaneous crop failures impacting global food security
This new study finds that the jet stream – air currents in the upper atmosphere – can synchronise extreme weather caused by climate change, resulting in crop failures in multiple countries at the same time.