Author Archives: David Appell

About David Appell

David Appell is a science writer living in Oregon and a regular contributor to Yale Climate Connections. (E-mail:, Twitter: @davidappell)

IPCC Scientists Assess the Assessments

The IPCC Assessment Reports are an increasing burden on the climate science community that may have reached its limits, according to the scientists who write them.


New Thinking About Climate Sensitivity

While climate models struggle to include ever more parts of the climate system, ideas based on simpler models are providing insights into the long-term evolution of climate.


From Bowels of AGU Fall Conference, Vital Poster Sessions Offer Riches

Too often overlooked and under-appreciated amidst the hundreds of formal high-visibility papers and sessions, the posters offered by scientists worldwide provide a uniquely useful and interesting perspective.


Strange Bedfellows? Climate Change Denial and Support for Geoengineering

Potential benefits of geoengineering, despite attendant risks, appeal to some interests showing little concern for the seriousness of the climate change issue generally. What goes here? 


W[h]ither Global Warming? Has It Slowed Down?

The so-called warming ‘hiatus’ over the past decade and a half is no reason for complacency on future warming. Mathematics teaches us that 15 years is simply too short a period from which to draw statistically valid conclusions.


Second of a Two-Part Series

The Ethics of Geoengineering (Pt. 2)

Part 1 of this feature discussed some of the geoengineering ideas and issues now current in climate science discussions. Part 2 introduces some of the ethical questions being raised about potential attempts to deliberately alter Earth’s properties to combat global [...]


First of a Two-Part Series

The Ethics of Geoengineering

Options for engineering the climate system, some long-dismissed by many as a vestige of Buck Rogers, are getting additional attention as near-term prospects for an effective political remedy remain bleak. But with research into the subject come increasing numbers of [...]


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