Please read about 'climate geoengineering' generally online and then post any example that interests you as a reply below. Use 2-3 sentences to describe the geoengineering technique you identify.
We will review the Moore et al. 2018 reading tomorrow in class!
I understand sulphate particles reflect the sun's rays. Are there any impacts with climate geoengineering?
ReplyDeletehttps://www.etcgroup.org/issues/climate-geoengineering
I thought solar geoengineering was a really interesting technique because it reflects a small fraction of sunlight back into outer space or increase the amount of solar radiation that escapes back into space to cool the planet. Doing this would help global warming by decreasing our temperatures on our planet even though this is not going to help global warming fully but helps save our planet.
ReplyDeleteOne of the more interesting geoengineering techniques I read about was the suggestion that walls can be built under the Antarctic ice sheets to prevent them from falling apart and collapsing, which would avoid dangerous sea-level rising. While the suggestion would definitely help, it would be really difficult to actually complete.
ReplyDeleteI think it's interesting how they want to freeze the base of the glaciers from sliding when everything else is still melting all over. It seems like a lot of energy being used for an area that can try to stop process verse an area that can't and will melt and will continue to add to sea rise.
ReplyDeleteThe idea of Ocean Iron Fertilization sounds really weird and borderline dangerous. The premiss of the idea is to dump iron fertilizer into the the oceans in hopes of expanding the amount of algae that would collect CO2. I think that fertilizing the ocean with iron is a very interesting idea however I do not think that the risks are worth the rewards.
ReplyDelete--- Ryan O'Sullivan
DeleteJust making sure my name shows up.
DeleteMarine cloud brightening is an option for solar engineering that I found pretty interesting. Ships out in the ocean could spray salt water into the clouds above the sea. The salt could turn the water vapor into liquid through condensation. As a result, the clouds would become more white and grow in size, allowing for the clouds to reflect more sunlight. The only problem is that in some parts of the world, weather will become unfavorable
ReplyDeleteTurn carbon dioxide into coal... with a new carbon-capture technique!
ReplyDeletehttps://www.dezeen.com/2019/03/20/carbon-dioxide-removal-geoengineering/
This is definitely in the maybe pile, but some scientists have figured out how to turn carbon dioxide into a solid, coal-like substance without having to use lots of heat. They use a liquid metal to help the process along and the end product can be used to store electricity. This might be used in the need for energy storage while being a "negative emission" technology.
Being a communications major I've never heard of the term "climate geoengineering" before so I had to do some research to fully understand the terminology. My question is from what I read online it says that no geoengineering techniques are safe to use worldwide yet so how do we plan to get to that point where the technologies are safe enough to use and prevent further climate change?
ReplyDeleteMereana Street
DeleteDirect air capture is a massive deployment of devices to extract CO2 from the ambient air. The nature of this technique is that of removal, rather than the injection or introduction of new chemical inputs to Earth's systems like other techniques employ. Direct air capture is only effective if combined with storage of the captures CO2. Carbon capture and storage (CSS) is a proven technology, however it has not been adopted on a wide enough scale yet.
ReplyDeleteClimate geoengineering is quite fascinating! Some ideas and plans are really great, while others are a little too extreme, and may actually cause more problems (like solar geoengineering or "cooling the earth").
ReplyDeleteThe one I am really interested in is:
Greenhouse Gas Removal (GGR) or Carbon Geoengineering
The idea of GGR, is to remove carbon dioxide or other greenhouse gases from the atmosphere, directly countering the increased greenhouse effect and ocean acidification. This would need to be done on a global scale to have a significant impact on greenhouse gas levels in the atmosphere.
Some proposed techniques include:
*Afforestation: global-scale tree planting effort.
*Biochar: 'Charring' biomass and burying it so that its carbon is locked up in the soil.
*Bio-energy with carbon capture and sequestration: Growing biomass, burning it to create energy and capturing and sequestering the carbon dioxide created in the process.
*Ambient Air Capture: Building large machines that can remove carbon dioxide directly from ambient air and store it elsewhere.
*Ocean Fertilization: Adding nutrients to the ocean in selected locations to increase primary production which draws down carbon dioxide from the atmosphere.
*Enhanced Weathering: Exposing large quantities of minerals that will react with carbon dioxide in the atmosphere and storing the resulting compound in the ocean or soil.
*Ocean Alkalinity Enhancement: Grinding up, dispersing, and dissolving rocks such as limestone, silicates, or calcium hydroxide in the ocean to increase its ability to store carbon and directly ameliorate ocean acidification.
I read an interesting article on the Marine Cloud Brightening Project which plans to test whether or not adding sea water mist to clouds can reflect more sunlight back into space to slow down global warming temperatures.
ReplyDeletehttp://www.geoengineeringmonitor.org/2018/04/marine-cloud-brightening-project-geoengineering-experiment-briefing/
I like the idea of building a wall to help block out warm water but I also do not like it as well. The reason I like the idea is because it can help got communities involved with protecting the ice caps and help spread knowledge. However, I do feel my ideas of the negative outweigh the positve for at least two main reasons. The first being were the funding would come from. Would it be payed for through taxes or government payments using tax they already collected. The second reason is "What would it do to the environment?". We could only really know the short term affect of building such a barrier, we don't really know what may happen hundreds of years of the future with it. Overall, I like the idea but I believe the negative outweighs the positive of doing it.
ReplyDeleteI found a very interesting article that mentions six ideas of reflecting sunlight to lower the planet's temperature. The one that interested me the most was the idea of an ocean mirror. This involves ships churning up micro-bubbles on the oceans surface, in turn, making the water more reflective.
ReplyDeleteI read “Policy Brief: The California Air Resources Board’s U.S. Forest offset protocol underestimates leakage” https://gspp.berkeley.edu/assets/uploads/research/pdf/Policy_Brief-US_Forest_Projects-Leakage-Haya_2.pdf This article examines how the cap-and-trade program has underestimated the leakage that occurs when a reduction in timber harvesting in one area leads to an increase in timber harvesting in another to meet timber demand. The study found that the protocol uses a leakage rate of 20% when in actuality the leakage rate is 80% or higher. The article cited an analysis that found 80% of total offset credits by the California Air Resources Board’s Forest offset credits found 82% of the credits do not represent true emissions reductions. This study recommends two updates to this part of the cap-and-trade program: 1. Leakage rates should be reset to 80% to more accurately represent the actual leakage rate on timber projects, and 2. Determine benefits of reduced harvesting for on-site carbon storage and decreased carbon storage elsewhere due to storage. I found this interesting because when I think about cap-and-trade I don’t consider timber harvesting as part of the carbon cap, and yet it makes sense since timber helps mitigate greenhouse gasses.
ReplyDeleteThis unknown blog post is mine.
DeleteOne technique for climate geoengineering is carbon dioxide removal technology which work to reduce Carbon Dioxide in the atmosphere. Another set of techniques are radiation management technologies that directly influence radiation balance and therefore temperature. The Glacial engineering that will be the subject of the class appears to be a radiation management technology since the goal is to slow down the process of glacier melting which will help regulate ocean temperatures and keep radiation more balanced globally.
ReplyDeletehttps://www.kiel-earth-institute.de/scoping-report-climate-engineering.html
One technique for climate geoengineering is carbon dioxide removal technology which work to reduce Carbon Dioxide in the atmosphere. Another set of techniques are radiation management technologies that directly influence radiation balance and therefore temperature. The Glacial engineering that will be the subject of the class appears to be a radiation management technology since the goal is to slow down the process of glacier melting which will help regulate ocean temperatures and keep radiation more balanced globally.
ReplyDeletehttps://www.kiel-earth-institute.de/scoping-report-climate-engineering.html
Connor French
DeleteSomething I read about was Ambient Air Capture which is building large machines to capture the CO2 and then we could store the CO2 somewhere else. Another one I read about was Afforestation which was growning trees on a larger scale. Which would convert the CO2 into oxygen. This kind of remind me of the building that china plans to build which is a build made out of plants.
ReplyDeleteScientists think that releasing reflective particles in the air (specifically around oceans) would reflect back the heat of the sun. This potential example of geoengineering could possibly help reduce climate temperatures.
ReplyDeletehttps://www.latimes.com/science/sciencenow/la-sci-climate-change-geoengineering-debate-20190424-story.html
Upon searching different geoengineering techniques, I found Aerosol injection to be interesting. Aerosol injection would eject sulphur dioxide with water to form an ash cloud(sulfuric acid aerosols) that would reflect incoming sunlight. Researching also believe the releasing aerosols could bring global rainfall patterns to their averages once before.
ReplyDeleteI came across this Yale article that discusses a couple geoengineering techniques, but the one that got my attention was a plan to cool the planet by putting sulphates into the upper stratosphere in an attempt to mimic the cooling effect that large scale volcanic activity creates.
ReplyDeletehttps://e360.yale.edu/features/geoengineer-the-planet-more-scientists-now-say-it-must-be-an-option
Chris Swan
DeleteI think it's interesting how they want to freeze the base of the glaciers from sliding when everything else is still melting all over. It seems like a lot of energy being used for an area that can try to stop process verse an area that can't and will melt and will continue to add to sea rise.
ReplyDeleteCalifornia extracts