Sirwan Yamulki

BSc, MSc, PhD

Related research

Research topic

Greenhouse gases and carbon dynamics of forestry

Research to understand the processes and rates of exchange of greenhouse gases in forests, and how they are affected by forest management

Status: Current


  • Climate change

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 were partners in the GREENHOUSE consortium, working in the NERC GHG Emissions and Feedback programme (2013-2017). We contributed to measurements examining the effects of forest management on GHG emissions and uptake. In particular Sirwan studyed the effects 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 effects of soil microtopography (ditch, mound, undisturbed) at an upland Sitka spruce plntation (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.

Peer reviewed journal articles

Yamulki, S and Morison, J.I.L. (2017) Annual greenhouse gas fluxes from a temperate deciduous oak forest floor. Forestry: An International Journal of Forest Research, Volume 90, Issue 4, October 2017, Pages 541–552

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

Sirwan Yamulki (2017) Tree emissions of CH4 and N2O: Briefing and review of current knowledge. Briefing update for Forest Research, Oct 2017, 28 pp.

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.