UCL Dept. of Space & Climate Physics | Mullard Space Science Laboratory
UCL logo: Click to visit UCL Homepage
Welcome to IMAGING
Group Resources
Associated Links
Other Links

Jonathan J. O'Regan

Research Interests

Photo of Jonathan O'Regan
  • Sun-Earth connections
  • Coronal Mass Ejections in the Inner Heliosphere
  • Electron and proton influx into the atmosphere, and energetic particle induced atmospheric events
    • Stimulation of Lightning Discharges
    • Seeding of Clouds, and Modification of Cloud Properties
    • Generation of Aurora
    • Effect on atmospheric composition
  • STEREO 3D Solar Imaging


"Observations and modeling of Sun-Earth connections using Solar and EO satellites"

Supervisors: Prof. Jan-Peter Muller & Dr. Sarah Matthews

Over the last decade, a number of studies have concluded that there is a strong correlation between solar activity (sunspots, high energy cosmic ray flux) and low altitude cloud cover on the Earth. However, there is no evidence published on the mechanism for this interaction nor on any specific examples to demonstrate these Sun- Earth connections. Utilising data from multiple instruments onboard the NASA STEREO mission, observations of the aurora from the NASA POLAR and observations of cloud formation from 15-minute interval METEOSAT and every 90 minute polar observations from NASA's MODIS, MISR and ESA's MERIS and AATSR, a few case studies will be studied in detail to study the Sun-Earth connections of the effects of CMEs on cloud formation. A simple dynamical model of the CME's passage through the solar wind and the consequent interactions of charged particles with the neutral atmosphere and with water vapour will be utilised to try to emulate key features of the observations from the multiple satellite observations.


Year of completion
Ph.D. Sun-Earth Connections University College London (UCL) in progress
M.Phys. Physics with Planetary and Space Physics University of Wales, Aberyswyth (UWA) 2009
n/a Space Studies Program (SSP) International Space University (ISU) 2006
B.Sc.Arch. Architecture University College Dublin (UCD) 2004




August [8th-12th]
14th International Conference on Atmospheric Electricity (XIV ICAE)
March [16th]
IoP / RMetS event: "Clouds and Earth's radiation balance - observational evidence"
March [14th-16th]
RSPSoc Annual Student Meeting (ASM)
September [1st-3rd]
RSPSoc 2010 Annual Conference - From the Sea-bed to the Cloud-tops
August [2nd-13th]
ESAs Earth Observation Summer School
April [12th-16th]
RAS National Astronomy Meeting (NAM) 2010
March [15th-17th]
RSPSoc Annual Student Meeting (ASM)


  • Poster Prize @ RSPSoc 2010 Annual Conference - From the Sea-bed to the Cloud-tops

  • One fact about me is...

    I used to be an Architect!

    Affiliated Organisations


    This page last modified 30 June, 2011 by imaging@mssl

    New Group Members

    The Imaging group would like to welcome the new Ph.D. students, Arrow Lee, Wil Poole and Daoxi Zhang to the team.

    Arrow will be working on reconstructing density and motion of the Solar atmosphere and Coronal Mass Ejections from a series of stereoscopic images captured by NASAs STEREO mission.

    Wil will be working on Mars surface roughness mapping using multi-resolution imaging and MOLA beam broadening, for landing site selection and the study of surface formation and evolution mechanisms.

    Daoxi will be working on understanding the potential and limitations of solar-induced and laser-induced flourescent imaging of cyanobacteria in freshwater and seawater.

    Mullard Space Science Laboratory - Holmbury St. Mary - Dorking - Surrey - RH5 6NT - Telephone: +44 (0)1483 204100 - Copyright © 1999-2005 UCL

      Disclaimer | Accessibility | Privacy | Advanced Search | Help

    Search by Google