Tweetovi
- Tweetovi, trenutna stranica.
- Tweetovi i odgovori
- Medijski sadržaj
Blokirali ste korisnika/cu @peteirvine
Jeste li sigurni da želite vidjeti te tweetove? Time nećete deblokirati korisnika/cu @peteirvine
-
Prikvačeni tweet
"Technical characteristics of a solar geoengineering deployment and implications for governance" with Doug MacMartin,
@joshuahorton533 and Ben Kravitz. A decision to deploy solar geoengineering will not just be a Yes / No question, here we explain some of the complications.pic.twitter.com/ZsiYZ6XW0w
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Pete Irvine proslijedio/la je Tweet
Climate Engineering as a Communication Challenge: Contested Notions of Responsibility Across Expert Arenas of Science and Policy https://journals.sagepub.com/doi/full/10.1177/1075547019899408 …
#geoengineeringHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
2 new papers on the way. One re-submitted before 9 am and hopefully another submitted later today.
Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I agree that its worthwhile changing focus from RCP8.5 towards a more realistic BAU case. However, there's a lot of momentum in the system. The core of the AR6 runs and the various MIPs are based on RCP8.5. This means that any transition away from RCP8.5 would take years.
Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Great job on the
@ezraklein geoengineering podcast@DrJaneFlegal! Going to recommend it to students who want to get a broader understanding of solar geoengineering issues when I cover this in my course.https://www.vox.com/podcasts/2019/12/23/21029860/ezra-klein-climate-change-geoengineering-jane-flegal …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The >$1B development cost is a major bump on the path from research to deployment that won't slip by unnoticed. Spending >$1B to develop this kind of aircraft would signal an intention to deploy. FIN 6/6
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
There are a few take aways from this paper: (1) deployment using aircraft is very feasible, (2) a more robust understanding of what would be required (number of flights, planes, etc.), (3) less concern about a slippery slope from experimentation to deployment. 5/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The aircraft has a wing span of ~52m, and an overall length of ~36m, 6 engines, and would be made using available engines and no new technology. They estimate that developing this aircraft would take 6 years and cost between $1.1 and $1.5 B. 4/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
For deployment at the 3 Mt scale they suggest that around a dozen airfields would be needed across the Tropics (30N-30S)
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The paper's design is for an aircraft that can fly to 20 km (which is high enough) carrying 13.5 tons of SO2. This would mean ~180 sorties per day with each aircraft flying twice a day, with excess capacity for repairs, etc. The mission profile is shown in the figure. 2/pic.twitter.com/MheWwTVvS7
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
This paper outlines an initial design for an aircraft that could deploy stratospheric aerosol geoengineering at scale, finding that ~80 aircraft would be needed to deploy 1 Mt SO2. Some more highlights follow https://arc.aiaa.org/doi/abs/10.2514/6.2020-0618 … 1/pic.twitter.com/bjK99AbkQK
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Pete Irvine proslijedio/la je Tweet
Congrats
@RobbieMallett for your first first author paper@CPOM@ES_UCL@London_NERC_DTP

Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates https://www.the-cryosphere.net/14/251/2020/ pic.twitter.com/hvNfoAw9sf
Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
A great paper, it challenges many things: the robustness of the standard econometric model, assumptions around the optimal level of cooling for solar geoengineering, and the fact that solar geoengineering would disproportionately benefit the North at the expense of the Tropics. /
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I agree with the authors that the hydrological impacts of climate change and solar geoengineering may not be well captured by these models but if so, then work needs to be done to resolve this problem. 9/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Either the model is robust in predicting the impacts of warming AND cooling and we should heed its predictions, or it is not robust for either and we should seek to understand why. Some great quotes from the authors on this. 8/pic.twitter.com/5EAcQy0zYL
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
In the scenario where they cool the planet substantially, the economies of the tropics boom, greatly reducing global inequality. This is a startling result and seems implausible. However, if the model is robust then it should be robust to both warming and cooling. 7/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
They find that deployed to halt warming solar geoengineering offsets most impacts of climate change but has some additional benefits as it overcools the hot tropics that are above the economically optimal temperature predicted by Burke et al. 6/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Now as solar geoengineering would lower temperatures you can guess where Harding et al. are going, but they go further than that. They include a scenario where solar geoengineering halts warming but also another where it drives temperatures substantially below current levels. 5/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Burke's original study found that Tropical countries would suffer disproportionately in a warming world as they are shifted farther from the optimum climate conditions and their economies suffer. This dynamic would mean global warming would lead to much greater inequality. 4/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The authors apply the widely cited and respected Burke et al. Econometric model to solar geoengineering. Burke found a robust relationship between economic production and temperature that predicts an optimum temperature and declining productivity away from that optimum. 3/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Find the article here: https://www.nature.com/articles/s41467-019-13957-x … This didn't get much media attention but I think this is one of the most interesting and challenging results for the field of climate econometrics and climate impacts assessment, and an important result for solar geoengineering. 2/
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.