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LinkedIn post on new solar geoengineering postdoc position.

2 minute read


I am pleased to announce that I have signed a new Postdoctoral Research Fellow contract to work on solar geoengineering simulations with the Met Office climate model, at the University of Exeter, with Jim Haywood.

The Early Eocene Equable Climate Problem Re-revisited.

5 minute read


Models can reproduce Eocene global-mean surface temperature and gradient by having less cloud. But the seasonality of high-latitude land temperature is larger than that suggested by the proxies, and this may be caused by having a smaller cloud radiative forcing.

An idealized model approach to understanding how solar geoengineering affects precipitation.

3 minute read


While we are confident that solar geoengineering will reduce the Earth’s surface temperature, its impact on precipitation merits further consideration. Early influential studies showed that solar geoengineering may disrupt the summer monsoons in Africa and Asia (Robock et al. 2008). However, more recent research found that the climate outcome of stratospheric aerosol injection depends on the location (Kravitz et al. 2019), quantity, season (Visioni et al. 2020) of injection, and type of reflectant used (Seeley et al. 2020). It’s not yet clear how these affect precipitation patterns.

How does solar geoengineering affect precipitation?

4 minute read


I would like to better understand how solar geoengineering might affect precipitation. Early climate model studies of solar geoengineering (Robock et al. 2008 for example) showed that stratospheric aerosol injection could disrupt the Asian and African summer monsoons. However, the more recent solar geoengineering research shows that the climate outcome of stratospheric aerosol injection very much depends on the location, quantity, and season of injection, and type of reflectant used.

Why does the Arctic warm more in winter than summer?

6 minute read


I am trying to understand how sea ice affects surface temperature in today’s climate and in projections of future climate change, and what drives the seasonality in Arctic temperature change.

A few points about solar radiation management.

4 minute read


Critiques of solar radiation management often make erroneous assumptions as to how scientists think about solar radiation management and how it fits with emission reductions. My view on solar radiation management was very similar to what is shown in this video until I did more research on the topic, so I would like to share a few points.

Fun with FaIR: How many years of temporarily reduced emissions (such as a pandemic!) does it take to make a dent in the 2100 temperature projection?

1 minute read


I played with FaIR $($Finite Amplitude Impulse Response simple climate model$)$ to look at the impact of the temporary reduction in emissions on global mean surface temperature change. The projected decrease in greenhouse gas emissions as a result of the pandemic vary a lot, but I just wanted to play with this model and have a sense of orders of magnitude.