Current Projects

BORNET-Eurasia (Eurasian Boreal Network for land-atmosphere-climate interactions)

The BORNET-Eurasia project aims to build capacity for a new joint research programme between European and Russian scientists, focussed on probing natural and man-made influences on short-lived climate pollutants over the Eurasian Arctic and boreal forest. As part of the project, we will collate avalable data from this remote region to evaluate existing multi-model experiments. this remote The project is being undertaken in close collaboration with scientists involved in the Pan-Eurasian Experiment (PEEX) programme.

Funding: NERC. Arnold PI.

Export of Ozone and Precursors from Europe and Impacts on Air Quality, Climate and Ecosystems (EurEX)

EurEX is examining dynamical and chemical controls on the export of tropospheric ozone and its precursors from Europe eastwards over Eurasia and to the Arctic and feedbacks to climate. In addition, we are examining the role of the Eurasian boreal forest as a sink for ozone through dry deposition, and assessing the impact of ozone deposition from European and Asian sources on photosynthesis and productivity of Eurasian vegetation.

Funding: NERC. Arnold PI.

Oceanic reactive carbon: chemistry-climate impacts (ORC3)

The ORC3 project aims to better understand oceanic emissions of reactive organic compounds, how they modify oxidative capacity and aerosol in the marine atmosphere, and the implications for the natural climate system. The project is in collaboration with Dwayne Heard in the School of Chemistry and with the University of York. The project involves both modelling and field work. Two 4-week field campaigns will take place at the NCAS Cape Verde observatory in early and late summer 2014.

Find out about the latest ORC3 developments and updates from the field campaigns at:

Funding: NERC. Arnold PI.

POLMIP - POLARCAT Model Intercomparison Project

POLMIP is evaluating the skill of 10 global and regional chemical transport models at simulating tropospheric ozone and precursors in the Arctic. This evluation goes beyond previous efforts by utilising an extensive set of in-situ aircraft observations of ozone, NOy and VOCs over the depth of the troposphere in spring and summer 2008. The project is jointly led by Steve Arnold at Leeds and Louisa Emmons at NCAR, USA.

Developing a framework to test the sensitivity of atmospheric composition simulated by ESMs to changing climate and emissions

This project will develop observation-based metrics for evaluation on atmospheric composition simulated by Earth system models. In particular, we will focus on the ability of models to simulate variability in aerosols and ozone on daily to inter-annual timescales, and emission-driven trends over recent decades. The project is a collaboration between the University of Leeds, the University of York and the Met Office.

Funding: NERC. Arnold co-I.

The Amazon hydrological cycle: past, present and future

This project is using novel measurements of oxygen isotopes in tree rings from across the Amazon basin to deduce changes in the water cycle over the past century. The project is led by Prof. Manuel Gloor in the School of Geography, and will involve integrating these observations with simulations of isotopic fractionation, and its dependencies on precipitation, water cycling / evapotranspiration, and moisture transport. Our group are involved in the modelling aspects of the project, including using our expertise in Lagrangian modelling to investigate changes in atmospheric transport and water cycling in the Amazon region over recent decades.

Funding: NERC. Arnold co-I.