21.12.2020

# New Publications

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Zhao, Mengying; et al. (2020): Climate more responsive to marine cloud brightening than ocean albedo modification: A model study

Zhao, Mengying; Cao, Long; Duan, Lei; Bala, Govindasamy; Caldeira, Ken (2020): Climate more responsive to marine cloud brightening than ocean albedo modification: A model study. In Journal of Geophysical Research: Atmospheres. DOI: 10.1029/2020JD033256.

"Marine cloud brightening (MCB) and ocean albedo modification (OAM) are two proposed approaches to intentionally reflect sunlight back to space over oceanic regions. Using the NCAR Community Earth System Model, we compare climate response to MCB and OAM under the framework of fast adjustment and slow feedback."

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03.11.2020

# Calls & events

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Job: Postdoctoral Scholar - Atmospheric Sciences (University of Washington)

No Deadline

"Develop and carry out climate model experiments in which aerosols are introduced into various cloud regimes of the marine boundary layer environment to explore impacts on the planet’s circulation features (near and far field impacts on clouds, winds, precipitation, ocean circulation and mixing, etc)."

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09.06.2020

# Media

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Phys.org: Ocean geoengineering tests violate UN convention: green groups

"Experimental geoengineering schemes to protect areas such as Australia's Great Barrier Reef are "distracting technofixes" that violate an international moratorium on the largely untested tech projects, a coalition of nearly 200 environmental groups said Monday."

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05.06.2020

# Media

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C2G: Guest post: Putting the Great Barrier Reef marine cloud brightening experiment into context

"In what is hoped to be a first step towards mitigating future GBR coral bleaching events, Australian scientists conducted the first outdoor marine cloud brightening (MCB) experiment in late March."

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05.06.2020

# Media

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C2G: Working with nature, so nature can work with us

"In societies that had started to separate humans from the natural world, people are returning to the notion that nature is something we are part of, integrally, which offers indispensable solutions to the multiple crises we face – including climate change. (Of course, there are many who never lost this understanding.)"

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01.06.2020

# Media

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Palo Alto Online: We are testing geoengineering, and that is a good thing

"I had a fascinating discussion about this topic with Thomas Ackerman, Professor Emeritus of Atmospheric Sciences at the University of Washington, in the context of a solar geoengineering technique called marine cloud brightening. I will give a quick overview of that approach and then dig into some of the testing considerations."

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14.05.2020

# Political Papers

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C2G: Blog post: Putting the Great Barrier Reef marine cloud brightening experiment into context

"In what is hoped to be a first step towards mitigating future GBR coral bleaching events, Australian scientists conducted the first outdoor marine cloud brightening (MCB) experiment in late March. The purpose of this experiment was to test a delivery mechanism comprised of 100 high-pressure nozzles that can spray nano-sized sea-salt particles into the air above the reef. At the time this experiment was conducted, leading reef scientists announced that the GBR was undergoing the third mass coral bleaching event in five years."

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30.04.2020

# New Publications

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Duan, Lei; et al. 2020: “A Model‐Based Investigation of Terrestrial Plant Carbon Uptake Response to Four Radiation Modification Approaches.”

Duan, Lei, Long Cao, Govindasamy Bala, and Ken Caldeira. 2020: “A Model‐Based Investigation of Terrestrial Plant Carbon Uptake Response to Four Radiation Modification Approaches.” Journal of Geophysical Research: Atmospheres 125 (9). https://doi.org/10.1029/2019jd031883.

"Using the National Center for Atmospheric Research Community Earth System Model, we performed simulations that represent four idealized radiation modification options: solar constant reduction, sulfate aerosol increase (SAI), marine cloud brightening, and cirrus cloud thinning (CCT)."

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22.04.2020

# Media

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Independent: ‘Snow machine like cannons’ could brighten clouds and halt Great Barrier Reef bleaching‘Snow machine like cannons’ could brighten clouds and halt Great Barrier Reef bleaching

"In a preliminary experiment, a scientific team used a cannon similar to a snow machine to blast droplets of sea water into the sky."

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20.04.2020

# Media

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The Guardian: Scientists trial cloud brightening equipment to shade and cool Great Barrier Reef

"The experiment used a modified turbine with 100 high-pressure nozzles to spray trillions of nano-sized ocean salt crystals into the air from the back of a barge."

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