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Test of Planet-Cooling Scheme Could Start in 2022

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Up there, 10 to 50 kilometers above the Earth’s surface, ozone molecules absorb the sun’s ultraviolet light, protecting life far below. The proposal calls for what’s known as “solar geoengineering”: cooling the planet by deflecting sunlight that would otherwise strike the planet.

Ozone 122
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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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while the carbon intensity of its economy declined by 4.5%. Transportation sector emission sources include combustion of fuels utilized in-state that are used by on-road and off-road vehicles, aviation, rail, and water-borne vehicles, as well as a few other smaller sources. In-State Hydro, Solar, and Wind Electricity Generation.

2017 230
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Study Finds Controlling Soot May Be Fastest Method to Reduce Arctic Ice Loss and Global Warming; Second-Leading Cause of Global Warming After CO2

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Results of the study suggest that soot is second only to carbon dioxide in contributing to global warming. Jacobson found that the combination of the two types of soot is the second-leading cause of global warming after carbon dioxide. Black carbon converts sunlight to heat and radiates it back to the air around it.

Global 230
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Cutting Non-CO2 Pollutants Can Delay Abrupt Climate Change; The Fast Action Climate Agenda

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Cutting HFCs, black carbon, tropospheric ozone, and methane can buy us about 40 years before we approach the dangerous threshold of 2°C warming. —co-author HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. Black Carbon. From Molina et al. Earlier post.) Mario Molina. (Dr.

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UC Davis Begins $2.8M Studies on Impacts of Escaped Nitrogen

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But excess nitrogen is emitted from soils, seeps into groundwater and runs off into surface waters. Nitrogen runoff in bays and coastal areas, where it makes algae numbers spike then crash, drawing oxygen from the water and leading to dead zones—areas that cannot support finfish, shellfish or most other aquatic life. Tom Tomich.

Davis 240
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Study Finds Asian Monsoon Carries Pollution Into the Stratosphere

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Those vertical movements provide a pathway for black carbon, sulfur dioxide, nitrogen oxides, and other pollutants to ascend into the stratosphere, about 20-25 miles above the Earth’s surface. This could explain satellite measurements showing high levels of stratospheric ozone, water vapor and other chemicals over Asia during summer.

Pollution 246
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UNEP Report Calls for More Sophisticated Approach to Developing Biofuels; Limitations of Current LCA Studies

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Here, RME show advantages for primary energy and GHG, but disadvantages in terms of acidification, eutrophication and ozone depletion. There is an obvious link between environmental impacts estimated by life-cycle impact assessments and water quality problems described at the regional scale. Source: “Assessing Biofuels”.

Ozone 186