Dr Gillian Young

Dr Gillian Young

Profile

I joined the Institute for Climate and Atmospheric Science (ICAS) in March 2019 as a Research Fellow on the Microbiology-Ocean-Cloud Coupling in the High Arctic (MOCCHA) project, modelling central Arctic clouds with the Met Office Unified Model and Met Office NERC Cloud model. Prior to Leeds, I worked as a cloud physicist at the British Antarctic Survey on the Microphysics of Antarctic Clouds (MAC) campaign, modelling Antarctic cloud physics with the Weather Research and Forecasting model. I completed my PhD in Atmospheric Physics at the University of Manchester in 2016, as part of the Aerosol-Cloud-Coupling And Climate Interactions in the Arctic (ACCACIA) campaign, using both measurements and a large eddy simulation model to further our understanding of Arctic cloud physics and aerosol-cloud interactions. 

As of Jan 2022, I will be working as a NERC Independent Research Fellow within ICAS on the Tackling the Arctic Cloud Problem project.

External to Leeds: 

  • Secretary of the International Arctic Science Committee Atmosphere Working Group. Early Career Fellow (2018-21) with the IASC Atmosphere Working Group prior to my appointment with the Secretariat.
  • Chair/Co-Founder of the Quantifying the Indirect Effect: from Sources to Climate Effects of Natural and Transported aerosol in the Arctic (QuIESCENT Arctic) initiative
  • Member of the Scientific Committee on Antarctic Research (SCAR) Antarctic Clouds and Aerosols Action Group
  • Member of the air Pollution in the Arctic: Climate, Environment, and Societies (PACES) scientific steering committee.

Research interests

As a cloud physicist, I study the small-scale interactions in polar clouds which drive their development, evolution, and lifetime. I've used a number of numerical models – at large eddy simulation, numerical weather prediction, and global scales – to conduct detailed studies of the physical processes within Arctic and Antarctic clouds.

The interaction between aerosol particles and clouds is a key uncertainty in general circulation models, and I am interested in the how these interactions affect cloud microphysical properties in the unique polar environment. Polar clouds differ from their mid-latitude counterparts in a number of ways but, most importantly, they are often mixed-phase (containing both liquid cloud droplets and ice crystals), long-lived, and therefore very difficult to model. I use observations to develop the representation of present-day polar clouds in high-resolution numerical models, improving our understanding of the small-scale physical processes which occur within them and enabling us to make judgements about how they may be affected by a changing climate. A key problem with making predictions of polar clouds is their microphysical sensitivity to different particle sources and meteorological forcings, both of which large-scale models fail to capture correctly. Polar aerosol sources range from local to distant – via long-range transport pathways – thus adding further complexity into understanding aerosol-cloud interactions: if we don’t know what aerosol are there, then we cannot truly understand how important they are in influencing the clouds in the region.

Or, to summarise:

  • Mixed-phase cloud microphysics
  • Polar boundary layer processes
  • Aerosol-cloud-radiation interactions
  • Arctic and Antarctic aerosol chemistry
<h4>Research projects</h4> <p>Any research projects I'm currently working on will be listed below. Our list of all <a href="https://environment.leeds.ac.uk/dir/research-projects">research projects</a> allows you to view and search the full list of projects in the faculty.</p>

Qualifications

  • PhD Atmospheric Physics, University of Manchester (2016)
  • MSci Physics and Astronomy, University of Glasgow (2013)

Professional memberships

  • International Arctic Science Committee

Research groups and institutes

  • Atmospheric and Cloud Dynamics
  • Atmospheric Chemistry and Aerosols
  • Institute for Climate and Atmospheric Science