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GREENCYCLES Biogeochemistry and Climate Change Research and Training Network


Sarah Shannon

Phone: +44 (0)117 33 17313
Fax: +44 (0)117 92 87878
Email: Sarah.Shannon -atnospam -

Postal Address:
School of Geographical Sciences
University of Bristol
University Road
Bristol BS8 1SS


current research | curriculum vitae | publications | carrer development plan (internal)

Current Research: Development of an improved global dust-cycle model through integration with an existing dynamic global vegetation model, and validation under modern and palaeo-conditions.

The objective of this research is to model the influence of vegetation cover on dust emissions by coupling a dust emission model (Tegen et al., 2002) directly to a dynamic global vegetation model (DGVM), LPJ-SPITFIRE. In order to improve representation of vegetation dynamics in arid regions, new shrub type plant functional types will be introduced into LPJ-SPITFIRE. A parameterisation for sub grid scale gustiness will be applied to the dust model.

The improved dust-cycle model will be used to investigate changes in the dust cycle under past, present and future climate conditions. Simulations will be run for palaeoclimate conditions at the Last Glacial Maximum (21,000 yr BP) and the Mid-Holocene (6,000 yr BP) using data from the Palaeoclimate Modelling Intercomparison Project (PMIP).

Simulated dust deposition rates will be compared to observed rates as recorded by ice, marine and terrestrial cores in The Dust Indicators and Records of Terrestrial and Marine Palaeoenvironments (DIRTMAP) data base. Glacial and interglacial dust deposition rates will be validated against ice core dust records.

This project (ERS VII) contributes to the science objective 6 (Quantify impacts of vegetation and climate changes on atmospheric dust, and its feedbacks on CO2 and climate). It has collaborations with projects ER 1 (Sönke), ESR XII (Anna) and ER 5.

Curriculum Vitae

since 2005 Greencyclist at the University of Bristol, UK
2002 - 2004 MSc student at the Atmospheric Science Research Group, National University of Ireland, Galway.
1995 - 2002 Queens University of Belfast, Northern Ireland