Sirwan Yamulki, BSc, MSc, PhD

Senior Scientist, Climate Change Group

Sirwan Yamulki


Tel: +44 (0)300 067 5600
Tel direct: +44 (0)300 067 5763
Fax: +44 (0)1420 23653

Forest Research
Alice Holt Lodge
Surrey GU10 4LH

Dr. Sirwan Yamulki joined Forest Research in 2006. He has over 25 years experience in soil greenhouse fluxes from agricultural management, land use and forestry. He studied for BSc and MSc (by research) in Agricultural/Soil Science at Cairo University, Egypt and PhD in Chemistry "Environmental Science" at the University of Birmingham (1989-1993). He joined the Institute of Grassland and Environmental Research (IGER, North Wyke) as a project leader to several UK and EU funded projects before joining FR.

Current role

Project Manager (Senior Scientific Officer, Climate Science Group)
Sirwan’s research experience and interests concerns monitoring, quantifying and elucidating the interactions between climate variables and soil parameters on carbon and greenhouse gas (and other pollutant) dynamics of forestry and other land uses. Providing evidence to support the development of policy and guidance.

His work focuses on measurement techniques for simultaneous flux measurements of the major GHGs (i.e. CO2, CH4 and N2O) to provide robust data that takes account of the full GHG budget of forest soils and to assess how these differ with soil and forest type and with management and how it may be affected by land use change. Sirwan is also interested and has been involved in modelling approaches to assess forest ecosystem and soil GHG balances.

He has also been involved in a number of interdisciplinary projects looking in particular; at quantifying soil GHG fluxes following clear-fell harvesting, land use change for bioenergy crops and from afforested peatland and agricultural management.

Current programmes

Greenhouse gases and carbon dynamics of forestry
Sirwan leads a number of projects to quantify the annual GHG (CO2, N2O and CH4) fluxes from oak (Straits) and Stika spruce (Griffin and Harwood) forests.

We are partners in the GREENHOUSE consortium, working in the NERC GHG Emissions and Feedback programme (2013-2017). We are contributing to measurements of the effect of forest management on GHG emissions and uptake. In particular Sirwan studying the effect of clear-fell harvesting on soil CO2, CH4 and N2O fluxes from an upland Sitka spruce forest in England.

Effect of forest soil microtopography
In collaboration with University of Edinburgh, Sirwan is assessing the effect of soil microtopography (ditch, mound, undisturbed) in an upland Sitka spruce at Griffin Forest (Perthshire, Scotland) on annual GHG budget.

GHG fluxes for afforested peatland
Sirwan led a project at Flanders Moss site near Stirling in Central Scotland to assess how drainage of lowland peatland for forestry can affect the GHG balance.

Other projects

  • LandscapeDNDC model evaluation and GHG simulation for oak and Sitka spruce forests in UK.
  • Soil GHG fluxes following land-use change to bioenergy crops (ELUM)
  • Contribution to the LULUCF GHG UK inventory
  • Methodology developments to measure soil and stand-scale N2O, CH4 and CO2 fluxes by eddy covariance and modelling
  • Measurement of CO2, CH4 and N2O fluxes above and below the forest canopy

Previous work focused on:

  • Quantifying the impact of agricultural management on GHG emissions
  • Investigating strategies to reduce emissions from main agricultural sectors
  • Investigating soil microbial processes and nutrient cycling.

Affiliations and responsibilities

  • Honorary Research Fellow, Department of Earth Sciences, Royal Holloway University of London
  • Member of British Society of Soil Science
  • Member of European Geosciences Union
  • PhD and MSc supervisions

Research areas

  • Forest and land management impacts on GHG balance
  • GHG fluxes for afforested peatland
  • GHG fluxes following land-use change to bioenergy crops
  • Quantifying GHG budget of forestry and contributing to the LULUCF GHG UK inventory
  • Methodology developments to measure and understand stand-scale N2O, CH4 and CO2 fluxes; eddy covariance and modelling.
  • Air pollution and forest ecosystem interactions

Main recent publications and knowledge exchange activities

Peer reviewed journal articles

Yamulki, S and Morison, J.I.L. (2017) Annual greenhouse gas fluxes from a temperate deciduous oak forest floor. Forestry. (In press).

Drewer, J., Yamulki, S., Leeson, S.R., Anderson, M., Perks, M.P., Skiba, U.M. and McNamara, N.P. (2017) Difference in Soil Methane (CH4) and Nitrous Oxide (N2O) Fluxes from Bioenergy Crops SRC Willow and SRF Scots Pine Compared with Adjacent Arable and Fallow in a Temperate Climate. BioEnergy Research (in press).

Dondini, M., Richards, M., Pogson, M., McCalmont, J., Drewer, J., Marshall, R., Morrison, R., Yamulki, S., Harris, Z.M., Alberti, G., Siebicke, L., Taylor, G., Perks, M., Finch, J., McNamara, N.P., Smith, J.U. and Smith, P. (2015) Simulation of greenhouse gases following land-use change to bioenergy crops using the ECOSSE model. A comparison between site measurements and model predictions. Global Change Biology Bioenergy, 1-38 [doi: 10.1111/gcbb.12298]

Yamulki, S., Anderson, R., Peace, A. and Morison, J.I.L. (2013) Soil CO2, CH4, and N2O fluxes from an afforested lowland raised peatbog in Scotland: implications for drainage and Restoration. Biogeosciences, 10, 1051-1065.

Skiba U., Jones S.K., Dragosits U., Drewer J., Fowler D., Rees R.M., Pappa V.A., Cardenas L., Chadwick D., Yamulki S. and Manning A.J. (2012) UK emissions of the greenhouse gas nitrous oxide. Philosophical Transactions of the Royal Society B, 367 no. 1593, 1175-1185.

Messenger, D.J., Fry, S.C., Yamulki, S. and McLeod, A.R. (2012) Effects of UV-B filtration on the chemistry and decomposition of Fraxinus excelsior leaves. Soil Biology & Biochemistry, 47, 133-141.

Smith K.A., Dobbie K.E., Thorman R., Watson C.J., Chadwick D.R., Yamulki S. and Ball B.C. (2012) The effect of N fertilizer forms on nitrous oxide emissions from UK arable land and grassland. Nutrient Cycling in Agroecosystems 93, 127-149.

Blackwell, M.S.A., Yamulki, S. and Bol, R. (2010) Nitrous oxide production and denitrification rates in estuarine intertidal saltmarsh and managed realignment zones. Estuarine Coastal and Shelf Science. 87, 591-600.

Matthews, R.A., Chadwick, A.L., Blackwell, M.S.A. and Yamulki, S. (2010) Nitrous oxide emissions from small-scale farmland features of UK livestock farming systems. Agriculture, Ecosystems and Environment. 136, 192-198.

FC and FR publications including official statistics

Morison, J., Matthews, R., Miller, G., Perks, M., Randle, T., Vanguelova, E., White, M. and Yamulki, S. (2012) Understanding the carbon and greenhouse gas balance of forests in Britain (PDF-7422K). Forestry Commission Research Report 18. Forestry Commission, Edinburgh. i–vi + 1–149 pp.

Vanguelova, E., Broadmeadow, S., Anderson, R., Yamulki, S., Randle, T., Nisbet, T. and Morison, J. (2011) A Strategic Assessment of afforested peat resource in Wales. Report for Forestry Commission Wales, Project No. 480.CY.00075, October 2012., 141 pp.

Morison, J.I.L., Vanguelova, E., Broadmeadow, S., Perks, M., Yamulki, S. & Randle, T. (2010) Understanding the GHG implications of forestry on peat soils in Scotland (PDF-2140K). Report for Forestry Commission Scotland, October 2010, Forest Research, 56pp.

Contract and project reports

Yamulki, S., Broadmeadow, S. and Skiba, U. 2012. Revised nitrous oxide emission estimates from forest soils in England, Scotland and Wales for the LULUCF inventory sector. Forest Research report.

Moffat, A.J., Benham, S., Morison, J.I.L., Pitman, R., Vanguelova, E.I., Wilkinson, M. and Yamulki, S. (2010) The value of forest monitoring in developing forest ecosystem science in Britain. In: JohnDerome – Ambassador for forest monitoring in Europe Memorial seminar, November 30th 2010, Rovaniemi, Finland, L Ukonmaanaho, K Derome, P Rauti and P Merilä eds. Working Papers of the Finnish Forest Research Institute 180. Finnish Forest Research Institute (METLA), Vantaa. Page 28.

Trade journal and newsletter articles

Yamulki, S. and Martin, S. (2010) Forests and greenhouse gases: more than just CO2. Forestry and Timber News 38, 21-22.

Scientific conferences: presentations or posters

Sirwan Yamulki, Georgios Xenakis, Adam Ash, Vladimir Krivtsov, Mike Perks, and James Morison 2017. Effect of clear fell harvesting on soil GHG fluxes from an upland Sitka spruce forest in England. Geophysical Research Abstracts, Vol. 19, EGU General Assembly 2017.

Sylvia Toet, Ben Keane, Sirwan Yamulki, Emanuel Blei, Simon Gibson-Poole, Georgios Xenakis, Mike Perks, James Morison and Phil Ineson 2016. Upscaling of greenhouse gas emissions in upland forestry following clearfell. Geophysical Research Abstracts, Vol. 18, EGU2016-13775, 2016, EGU General Assembly 2016.

Harris,Z.M., Bottoms, E., Massey, A., McCalmont, J., Yamulki, S., McNamara, N., Finch, J., Donnison, I., Perks, M., Smith, P. and Taylor, G. 2013. First results from the UK network to establish the greenhouse gas balance of land conversion to second generation bioenergy willow, Miscanthus and short rotation forestry. Geophysical Research Abstracts, vol. 15, EGU2013, 13524-13523.