Table 3 Summary of discussions on SG research.

From: Elicitation of US and Chinese expert judgments show consistent views on solar geoengineering

Research areas

US experts

Chinese experts

Deployment technology

1 expert supported research into deployment technology;

2 experts explicitly said no research into deployment technologies

3 experts supported research into deployment technology

No research

All experts support at least some research

1 expert doesn’t support research at all at any level. (but wouldn’t block others’ research efforts or funding)

Large-scale outdoor research

No expert thinks large scale experiment should be done in the short term;

4 mentioned the possibility of longer-term larger scale research but only if other smaller scale research can’t answer the questions and if major governance is put in place

1 expert support large scale engineering demo

Small-scale outdoor research

7 experts mentioned small scale research with caveats, (e.g. needs independent governance)

3 experts mentioned small scale research with caveats (e.g. needs independent governance)

A range of methods

7 experts explicitly mentioned research into a range of technologies (e.g., marine cloud brightening, space-based SG technologies)

3 experts mentioned research into a range of technologies (e.g., marine cloud brightening, space-based SG technologies)