Photo of Dr Joe Osborne

Dr Joe Osborne

Associate Research Fellow

Email:

Telephone: 01392 723612

Extension: (Streatham) 3612

Current work

I am an Associate Research Fellow in the Exeter Climate Systems group, working on the EuroClim project. This project aims to improve European seasonal weather forecasts. To this end I am currently investigating the sensitivity of seasonal weather and climate to two key surface boundary conditions: 1) Arctic sea-ice, and 2) North Atlantic SSTs. I am working closely with Mat Collins and James Screen, as well as collaborators from the Met Office.

To date I have shown a sensitivity of the atmospheric response to Arctic sea ice loss to the ocean-atmospheric state of the North Pacific (Osborne et al., 2016).

Past work

My PhD (supervised by Hugo Lambert) attempted to understand changes in Northern Hemisphere land precipitation. Building on the tropospheric energy budget constraint on global mean precipitation, I showed that model-simulated historical changes in Northern Hemisphere mid-latitude land precipitation display a predictable response to aerosol forcing in the mid-twentieth century. However, this aerosol response is not evident in key mid-latitude precipitation observations (Osborne and Lambert, 2014). I also showed that observed runoff changes, derived from river discharge measurements, contrast with observed precipitation changes in this region (Osborne et al., 2015). This contrast is a consequence of an obvious breakpoint in the runoff-precipitation relationship.

Immediately after my PhD I worked briefly as an Associate Research Fellow with the Met Office on the Climate Science for Service Partnership: China. This project used the Budyko framework to demonstrate that biases in model climatology (notably precipitation) can lead to large errors in projected land surface hydrological changes in China. By correcting for these biases (using observational constraints) more robust hydrological projections can be made. A paper on this work is in preparation.

Research interests

  • Large scale climate variability and change
  • Land surface hydrological change
  • Impacts of sea-ice/ocean variability on seasonal weather/climate

Publications

Osborne, J. M. and F. H. Lambert, A simple method to constrain land surface hydrological projections in China, in prepartion for submission to Water Resources Research (2016).

Osborne, J. M., J. A. Screen and M. Collins, Ocean-atmospheric state dependence of the atmospheric response to Arctic sea ice loss, Journal of Climate, 10.1175/JCLI-D-16-0531.1 (2016).

Osborne, J. M., F. H. Lambert, M. Groenendijk, A. B. Harper, C. D. Koven, B. Poulter, T. A. M. Pugh, S. Sitch, B. D. Stocker, A. Wiltshire and S. Zaehle, Reconciling precipitation with runoff: observed hydrological change in the midlatitudes, Journal of Hydrometeorology, DOI:10.1175/JHM-D-15-0055.1 (2015).

Osborne, J. M. and F. H. Lambert, The missing aerosol response in twentieth-century mid-latitude precipitation observations, Nature Climate Change, DOI:10.1038/NCLIMATE2173 (2014).

Presentations

2016

September, CLIVAR Open Science Conference (Qingdao, China), 'Ocean-atmospheric state dependence of the atmospheric response to Arctic sea ice loss' [Poster]

July, RMetS NCAS Conference 2016 (Manchester, UK), 'Ocean-atmospheric state dependence of the atmospheric response to Arctic sea ice loss' [Poster]

June, GEWEX Hydro-Climate Sensitivity Workshop (Exeter, UK), 'Links between observed precipitation, runoff and aerosols' [Oral]

February, CeG Seminar (Newcastle, UK), 'A simple method to constrain land surface hydrological projections in China' [Oral]

2015

November, XCS Meeting (Exeter, UK), 'Ocean-atmospheric state dependence of the response to sea-ice loss' [Oral]

2014

January, RMetS Local Centre Meeting (Norwich, UK), 'Precipitation change: from the global to the regional scale' [Oral]

2013

December, 2013 AGU Fall Meeting (San Francisco, USA), 'The response of Northern Hemisphere mid-latitude precipitation to aerosol forcing' [Poster]

October, CSAG Seminar (Cape Town, South Africa), 'Aerosols and Northern Hemisphere mid-latitude precipitation change' [Oral]

September, RMetS Student Conference 2013 (Reading, UK), 'Precipitation change in the Northern Hemisphere mid-latitudes' [Oral]

July, CliMathNet Conference 2013 (Exeter, UK), 'The response of precipitation to sulphate aerosol forcing in the Northern Hemisphere mid-latitudes' [Oral]

May, XCS Meeting (Exeter, UK), 'Precipitation change in the Northern Hemisphere mid-latitudes' [Oral]

April, NCAS Earth System Science Spring School 2013 (Edinburgh, UK), 'Understanding Northern Hemisphere land precipitation change' [Oral]

2012

July, RMetS Student Conference 2012 (Leeds, UK), 'Understanding Northern Hemisphere land precipitation change' [Poster]

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