I have been involved in the supervision of the research students listed below,
either as the main supervisor or a member of the supervision panel.
- PhD students (as main supervisor)
- In progress:
- Guangzhi Xu (2012-ongoing, jointly supervised with Adrian Matthews).
Guangzhi is studying the large-scale hydrological cycle of the tropics, using instrumental
satellite and re-analysis data. He is assessing the uncertainty in some of the components
of the water budget, such as the atmospheric transport of water and the water balance of
the land surface, and will then consider how these components change with the seasonal
cycle and associated with tropical climate modes.
- Rita Yu (2010-ongoing).
Rita is funded by AXA to investigate possible future scenarios of drought across Europe, including
the spread of results from different scenarios, difference climate models, and
different metrics or definitions of drought. She has simulated changes in runoff
with the MacPDM hydrological model and is using these to compare the changes in
hydrological drought with changes in meterological drought from the Standardised
- Jonathan Barichivich (2009-ongoing, jointly supervised with Keith Briffa).
Jonathan is funded by CONICYT to further our understanding of the interactions between
temperature, drought, the boreal forest and the carbon cycle.
- Jessica Vial (2008-2012).
Jessica investigated the links between atmospheric blocking, extreme weather
events and climate change. She evaluated the ability of general-circulation-model-based
climate models to simulate the occurrence and characteristics of blocking circulation
patterns over the Northern Hemisphere, and diagnosed whether these models predict
any significant changes in blocking characteristics under greenhouse-gas-induced
climate change. She then considered the potential links between sudden warming of
the stratosphere and the occurrence of blocking.
- Simon Busby (2005-2010, jointly supervised with Keith Briffa).
Simon used instrumental data, proxy data and
model simulations to study the links
between drought over the US and teleconnections, and how these have
varied during the last 1000 years, possibly in response to radiative forcings.
- Carol McSweeney (2003-2007). Carol had a NERC CASE studentship
with the Centre for Ecology and Hydrology (CEH) as the non-academic partner,
with contributions from Nick Reynard at CEH.
Carol investigated how the statistical characteristics of precipitation,
including its variability and extremes, depend upon the spatial scale
being considered. She applied her results to the evaluation of climate
model simulations with small samples of raingauge observations (thus
converting behaviour between the point scale of the raingauges and the
area-averaged scale of climate model grid boxes).
Carol also considered whether the spatial coherence of future precipitation
might be different to the present-day climate, and how this might
modify the relationships that relate behaviour at point and area-averaged
scales in the future.
- Amanda Townsend (2002-2007, jointly supervised with Jan Janacek
and Jean Palutikof). Amanda investigated the use of statistical extreme
value analysis to identify changes in extreme temperature and precipitation
observed in UK climate records. In particular, she used extreme value
analysis that including time and other variables as covariates, to
investigate changes through time without violating the assumption of
stationarity that is usually necessary when applying extreme value theory.
- Craig Wallace (1999-2003, jointly supervised with Mick Kelly). Craig investigated the annual cycle
of temperature and atmospheric circulation, in observations and climate
model simulations. Two specific foci were how the annual temperature cycle
changes in response to greenhouse gas and tropospheric sulphate aerosol
forcing, and the driving mechanisms of the European monsoon (a period of
weakened westerly flow into Europe during late spring, followed by the
"return of the westerlies" in June).
- PhD students (as member of supervisory panel)
- In progress:
- Ian Simpson (2007-2012). Ian investigating the variability
of UK precipitation at a range of space and time scales during recent
decades and centuries.
- Richard Cornes (2006-2010). Richard extended our record of North Atlantic
and European atmospheric circulation by developing records from early
meteorological data in Paris and near London.
- Huy Luong Quang (2004-2009). Huy undertook research in the areas of
climate change impacts and sustainable development and their link with socio-economic
- Saffron O'Neil (2004-2008). Saffron investigated the relevance of using
the vulnerability of world "icons" to climate change as a tool for defining dangerous
climate change and communicating climate change impacts to the public.
- Stephen Blenkinsop (2001-2005). Stephen investigated changes in the variability and extremes of observed temperature and precipitation over the UK, and related them to variations in atmospheric circulation.
- Matt Livermore (2000-2005). Matt investigating the impact on health and energy use of future changes
in extreme temperatures across Europe.
- Tom Melvin (1999-2004). Tom investigated empirical and model-based methods of removing
trends related to tree age from tree-ring data (standardisation), to allow the reconstruction
of multi-century climate changes. He identified many problems and improvements to existing
standardisation methods, including the bias at the ends of the records that may explain some of
the recent decline in tree-growth relative to climate.
- Peter Thorne (1998-2001). Peter investigated the detectability
of natural and anthropogenic climate change signals in the 3D (latitude,
longitude, altitude) temperature field of the troposphere and stratosphere,
using optimal detection/regression techniques.
- Tim Mitchell (1997-2000). Tim investigated the behaviour
of the "pattern-scaling" technique for generating climate change
scenarios, testing whether spatial and seasonal changes in mean
precipitation and some of its higher order statistics can be related
linearly to globally and annually averaged temperature change.
- Byoung-Choel Choi (1997-2000). Byoung investigated the links
between Eurasian snow cover, the ENSO phenomenon, and the Asia summer
monsoon, using an empirical approach and with a view to assessing the
potential for seasonal forecasting of the monsoon.
- MSc students (as main supervisor)
- In progress:
- Guangzhi Xu (2011). Guangzhi analysed the empirical relationships between
Indian Ocean tropical cyclones and the Indian Ocean dipole of sea surface temperature
- Dorcas Masisi (2009). Dorcas used my ClimGen software application to
explore the uncertainty in future precipitation changes over southern Africa. She
then used the Standardised Precipitation Index (SPI) as a metric of drought occurrence
to estimate possible changes in drought frequency in the future.
- Steve Jones (2008). Steve evaluated the performance of GCM-based climate
models at simulating present-day atmospheric circulation in the Northern Hemisphere,
and the use of performance metrics to weight different GCMs when combining multiple
models to make future projections of the winter North Atlantic Oscillation index.
- Rita Yu (2007, jointly supervised with Rachel Warren). Rita assessed
uncertainty in future European
drought occurrence under a range of different climate model projections, and
evaluating the benefits (in terms of drought risk) of stabilising greenhouse
gas concentrations to avoid larger changes in climate.
- Rakia Meister (2006). Rakia used a number of multi-century simulations
with the HadCM3 climate model to investigate the spatial variability of sea level
changes over the last 500 years, and specifically to consider whether a sub-sample
of sea level data (chosen to reflect the location of tide-gauge records) can
provide an accurate estimate of the actuall globally-averaged sea level.
- Carol McSweeney (2003). Carol used the SDSM statistical
downscaling model to generate future time series of daily precipitation
for two catchments in the UK, compared her results with those of a
regional climate model, and used them to drive hydrological streamflow
- Yumi Goto (1999). Yumi used the Hamburg LSG ocean general
circulation model coupled to a simple statistical atmosphere model, to
investigate the response of the thermohaline circulation to closing
the Drake Passage or opening the Panama Isthmus.
- Cecilia Hellstrom (1997, jointly supervised with David Viner).
Cecilia evaluated the simulation of
daily weather circulation types in the Mediterranean region by a coupled