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Guy R. McPherson

Publications and source records attributed to Guy R. McPherson.

2 recordsLinked to original sources

The largest elephant in the room: aerosol masking

The aerosol masking effect, or global dimming, is a well-documented instance of our ongoing climate predicament: Efforts to mitigate greenhouse gas production by curbing industrial activity or transitioning to clean sources such as solar or nuclear inevitably and inadvertently accelerate planetary warming. This undesired outcome results from aerosols that result from industrial activity. This article describes some climate mitigation strategies destined to fail because they do not account for the aerosol masking effect. Moreover, many political and ethical initiatives emphasize the business as usual framework, thus worsening the conundrum. We suggest instead a set of ethical and policy initiatives to address the challenge of aerosol masking, and we describe how our contemporary predicament can be ameliorated in the face of these significant and often-overlooked challenges.

physics.soc-ph↗

Environmental thresholds for mass-extinction events

While the global-average temperatures are rapidly rising, more researchers have been shifting their focus towards the past mass-extinction events in order to show the relations between temperature increase and temperature thresholds which might trigger extinction of species. These temperature and mass-extinction relation graphs are found practical by conservationists and policy makers to determine temperature threshold values to set climate targets. Unfortunately, this approach might be dangerous, because mass-extinction events (MEEs) are related to many environmental parameters and temperature is only one of them. Herein we provide a more comprehensive evaluation of the environmental thresholds required to sustain a habitable planet. Besides, we suggest actions within the sustainable-development goals (SDGs) to observe those critical environmental parameters, in order to assure having an inhabitable planet for the current living species.

astro-ph.EP↗