Ádam Ignéczi

iamge

Greenland Ice sheet hydrology and dynamics: the role of surface and basal roughness - controls governing the distribution of supraglacial lakes on the Greenland Ice Sheet

Supervisors: Dr Andrew Sole, Dr Stephen Livingstone

PhD Research

The aim of my PhD project is to investigate the influence of surface and bed topography, ice thickness, ice flow regime and surface melt on the spatial distribution of surface depressions and surface lakes on the Greenland Ice Sheet (GrIS).

Surface lakes are formed in topographical depressions on the GrIS during melt seasons. Surface lakes are able to drain to the ice sheet bed through hydrofracture, during which surface fractures propagate to the bed, forming direct surface-to-bed hydrological links and providing a substantial input of surface meltwater to the subglacial hydrological system. This type of surface lake drainage is known to cause transient increases in ice flow, affect basal conditions and ice rheology and reduce the transit time of meltwater runoff to the ocean.

Outcomes of my work will provide a solid basis for modelling the future effects of surface lakes on the mass balance and dynamics of the GrIS which will enhance the reliability of the estimations on the future contribution of the GrIS to global sea-level rise.

Research interests:

  • Glaciology
  • Glacial hydrology
  • Paleoglaciology of high mountain environments
  • Geomorphology
  • Permafrost research

Other activities:

I am currently involved in the Hungarian Atacama Climate Monitoring Expedition. This expedition aims to monitor the processes related to ice and water in an extremely arid high mountain environment in the Chilean Andes. The investigation is mainly based on in situ measurements on the Earth’s highest volcano, the Ojos del Salado (6893 m). I will participate on the next field session in February, 2016 and will be involved in the subsequent scientific evaluation as well.

Education:

  • MSc Geography, Eötvös Loránd University, Budapest, Hungary (2012-2014) passed with distinction
    Thesis: ‘Reconstructing the maximal glaciation of the Godeanu Mountains by numerical ice flow modelling’
  • BSc Earth Sciences, Eötvös Loránd University, Budapest, Hungary (2009-2012) passed with distinction
    Thesis: ‘Optimization of the accumulation-area ratio method for outlet glaciers’

Conferences:

  • Ignéczi, Á., Sole, A.J., Livingstone, S.J., Leeson, A., Fettweis, X., Selmes, N., Gourmelen, N., Briggs, K. 2016. Controlling factors on the future distribution of supraglacial-lakes on the Greenland Ice Sheet.
    AGU Fall Meeting, San Francisco, USA. 2016, December; poster
  • Ignéczi, Á., Sole, A.J., Livingstone, S.J., Leeson, A., Fettweis, X., Selmes, N., Gourmelen, N., Briggs, K. 2016. Inland expansion of supraglacial-lakes on the Greenland Ice Sheet during the 21st century.
    IGS British Branch Meeting, Southampton, UK. September, 2016; oral presentation
  • Livingstone, S.J., Ignéczi, Á., Sole, A., Rippin, D., Hill, J., McMillan, M., Quincey, D. 2015. Roughness modulation of Greenland Ice Sheet hydrology and ice flow dynamics.
    International Glaciological Society (IGS): British Branch Meeting, Durham, UK. September 2015; poster
  • Livingstone, S.J., Ignéczi, Á., Sole, A., Rippin, D., Hill, J., McMillan, M., Quincey, D. 2015. Roughness modulation of Greenland Ice Sheet hydrology and ice flow dynamics.
    International Glaciological Society (IGS): Symposium on the hydrology of glaciers and ice sheets, Höfn, Iceland. June 2015; poster
  • Ignéczi Á., 2015. Surface depressions and supraglacial lakes on the Greenland Ice Sheet.
    Royal Geographical Society (RGS) Midterm Conference, Sheffield, UK. March 2015; oral presentation
  • Ignéczi Á., Nagy B., 2014. A Late Pleistocene ice field in the Godeanu Mountains, Southern Carpathians.
    Late Pleistocene and Holocene climatic variability in the Carpathian-Balkan region, Cluj-Napoca, Romania. November, 2014; oral presentation
  • Ignéczi Á., Nagy B., Kern Z., 2011. Examination of the accumulation-area ratio method in the case of non-typical glacier types.
    Climate change in the Carpathian-Balkan region during the Late- Pleistocene and Holocene, Suceava, Romania. June, 2011; oral presentation

Publications:

Accepted Papers:

  • Ross, N., Sole, A.J., Livingstone, S.J., Ignéczi, Á., Morlighem, M., 2017. Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland. Arctic, Antarctice and Alpine Research
  • Ignéczi, Á., Sole, A.J., Livingstone, S.J., Leeson, A., Fettweis, X., Selmes, N., Gourmelen, N. and Briggs, K. 2016. North-east sector of the Greenland Ice Sheet to undergo the greatest inland expansion of supraglacial lakes during the 21st century. Geophysical Research Letters, 43, doi:10.1002/2016GL070338.
  • Ignéczi Á., Nagy B., 2015. Former plateau ice fields in the Godeanu Mountains, Southern Carpathians; providing the first evidence on glaciated peneplains in the Carpathians. Quaternary International, In press
  • Ignéczi Á., Nagy B., 2013. Determining steady-state accumulation-area ratios of outlet glaciers for application of outlets in climate reconstruction. Quaternary International vol. 293

Submitted Papers (In Review):

  • Nagy, B. Ignéczi, Á., Kovács, J., Szalai, Z., Mari, L., 2017. Permafrost in a high mountain desert: active layer monitoring on the highest volcano of the Earth, the Ojos del Salado, Dry Andes. Permafrost and Periglacial Processes.

Papers In Preparation:

  • Ignéczi Á., Sole A.J., Livingstone, S.J., Ng, F.S.L., Yang, K., Rippin, D. The transfer of basal variability controls ice surface topography and the hydrology of the Greenland Ice Sheet. Target journal: TBC
  • Ng, F.S.L., Ignéczi, Á., Sole, A.J., Livingstone, S.J. Non-stationary response of surface topography to basal variability along ice flowlines. Target journal: TBC

Teaching:

  • 2016-17 Professional Skills for International Development (GEO6803/GEO6304)
  • 2016-17 Introduction to Physical Geography (GEO-113)
  • 2016-17 Introduction to Environmental Geography (GEO-115)
  • 2016-17 Research Design (GEO-248)
  • 2016-17 State of Sheffield (IPS-101)
  • 2015-16 Earth's Evolution (GEO-166)

Awards and scholarships:

  • 2014: ICERS (Ice and Climate Research at Sheffield) PhD scholarship
  • 2014: Outstanding Student of the Faculty, Eötvös Loránd University, Budapest
  • 2013: Campus Hungary grant on internship, Eötvös Loránd University, Budapest
  • 2012 - 2013: Scholarship of the Hungarian Republic
  • 2011 - 2012: Scholarship of the Hungarian Republic
  • 2011: Outstanding Student of the Faculty, Eötvös Loránd University, Budapest
  • 2011: National Scientific Students’ Associations Conference; II. place
  • 2008: International Geography Olympiad; silver medal

Contact Details:

Department of Geography, University of Sheffield, Winter Street, Sheffield, S10 2TN, UK
aigneczi1@sheffield.ac.uk
ignecziadam@gmail.com

Links/Media Outreach:

LinkedIn profile

Our research discussed in the Washington Post:
http://www.washingtonpost.com/news/energy-environment/wp/2016/10/11/how-greenlands-ice-is-melting-from-above-and-below/?utm_term=.eedfd07e7918