School of Earth and Environment

Ruza Ivanovic Dr Ruza Ivanovic

NERC Research Fellow

Telephone number: +44(0) 113 34 32231
Email address: R.Ivanovic@leeds.ac.uk
Room: 11.105

Affiliation: Earth Surface Science Institute, Institute for Climate and Atmospheric Science

Link to personal page

Biography

I am a [palaeo] climate modeller interested in physical climate interactions between the atmosphere, ice sheets and oceans, as well as glacial-interglacial carbon storage. I use general circulation models and isotope geochemistry to understand climate-ice-ocean interactions. My research investigates mechanisms of past abrupt climate change using versions of the UK Met Office's Unified Model (e.g. FAMOUS and HadCM3), primarily focusing on the influence of ice sheet meltwater on ocean circulation, and associated feedbacks.

I also lead the Palaeoclimate Modelling Intercomparison Project (PMIP) Last Deglaciation Working Group. Contact me for more details.

Find me online:

orcid.org/0000-0002-7805-6018 ; ResearcherID ; Scopus ; Google Scholar ; ResearchGate ; Academia.edu ; Twitter: @DrRuza

Not very up to date Personal webpage.

Qualifications

PhD University of Bristol
BSc University of Bristol
FHEA (Fellowship of the Higher Education Academy under the UK Professional Standards Framework)

Memberships/Fellowships

Leadership:
CLIVAR (Climate and Ocean – Variability, Predictability, and Change) Atlantic Region Panel member (2015-2019)
Leader of the Palaeoclimate Modelling Intercomparison Project (PMIP) Last Deglaciation Working Group (2013-)

Academic:
NERC Independent Research Fellow (2013-2018)

Society memberships:
Lifelong member of the European Geosciences Union (EGU, 2018-)
Lifelong member of the American Geophysical Union (AGU, 2017-)

Research Groups: Physical Climate change; Leeds Quaternary; Palaeo@Leeds

Research Interests

I am particularly interested in climate-ice sheet-ocean interactions taking place during the last deglaciation (21 thousand years ago to present). As well as the long term transition from previous glacial conditions to the current interglacial period, this encompasses several abrupt climate changes (annual-centennial), including:

  • The onset of Heinrich Stadial 1, when Northern Hemisphere temperatatures cooled and Atlantic ocean circulation slowed
  • Heinrich Event 1, when armadas of icebergs rafted out across the North Atlantic
  • The abrupt Bolling Warming, when Northern Hemisphere temperatures rose by as much as 10 degrees C in just a few decades, and Atlantic ocean circulation suddenly strengthened
  • Meltwater Pulse 1a, when global sea level rose by 12-22 m in less than 350 years (the fastest major sea level rise ever recorded)
  • The Antarctic Cold Reversal, when Southern Hemisphere temperatures reversed their warming trend
  • The Younger Dryas, when an abrupt cooling temproarily halted the deglaciation
  • The 8.2 kyr event, when catastrophic freshwater drainage from North America disrupted Atlantic Ocean circulation and caused widespread cooling

My work focuses on understanding the triggers for these events, their impact on climate, and the role of ice sheets and the oceans in the surface climate changes.

A key component of this work is the use of geochemical tracers of ocean circulation to understand past changes in ocean circulation. To best use these tools, I am supervising the implementation of the following tracers in the ocean component of the UM version 4.5 climate model (hadCM3 and FAMOUS):

  • Carbon-13 isotopes (δ13C): productivity and remineralisation (nutrients)
  • Carbon-14 isoptopes (D14C): water age
  • Protactinium and Thorium isotopes (213Pa/230Th): circulation kinematics
  • Neodymium isotopes (eNd): water provenance

The coupled model (atmosphere and ocean) also includes oxygen isotopes and deuterium (δ18O, δD).

Funded research projects:

  • Forward modelling of past abrupt climate transitions, NERC (NE/K008536/1), 2013-2018
  • Pliocene gateways, NERC (NE/J012726/1), 2012-2013
  • Mediterranean Outflow Water and the Messinian Salinity Crisis, University of Bristol Centenary Scholarship, 2009-2012

PhD projects:

Advertised (applications now closed):

See latest info about the Leeds-York NERC DTP scheme.

Current:

  • Ilkka Matero (co-supervisor; Oct 2014-): North American ice sheet collapse and abrupt climate change during the 8.2 kyr event.
  • Jennifer Dentith (primary supervisor; Oct 2015-): Abrupt climate transitions and geological tracers of ocean circulation.
  • Andrew Mair (co-supervisor; Oct 2017-): Signals of the ice age in the tropics - new records from the Uruguayan Margin.

Past:

  • Rhian Rees-Owen (co-supervisor; Oct 2012-2016): Antarctic Climate and vegetation during the Neogene: a geochemical and modelling approach.
  • Jamie Boyd (co-supervisor; Oct 2012-2016): Global and regional assessment of Neogene climate and palaeoceanography using dinoflagellate cysts.

Teaching Interests

Current undergraduate/postgraduate teaching:

As module leader:

  • SOEE2160: Climate Change: Science and Impacts

As part of the teaching team:

  • SOEE3291: Arran Field Course - Atmospheric Science Field Skills
  • SOEE3610/5617M: Oceanography in the Earth System
  • SOEE3480/5656M: Past Global Environmental Systems (leader of the level 3 assignment)
  • SOEE1020: Ice Age Environments and the Quaternary Evolution of the British Isles

Publications

In review:

  • Ivanovic RF, Gregoire LJ, Burke A, Wickert AD , Valdes PJ , Ng H C , Robinson LF, McManus J F, Mitrovica JX, Lee L , Dentith JE. Acceleration of northern ice sheet melt induces AMOC slowdown and northern 1 cooling in simulations of the early last deglaciation. (Submitted to Paleoceanography and Paleoclimatology)

  • Gandy N, Gregoire LJ, Ely JC, Clark CD, Hodgson DM, Lee V, Bradwell T, Ivanovic RF. Marine Ice Sheet Instability and Ice Shelf Buttressing Influenced Deglaciation of the Minch Ice Stream, Northwest Scotland. (Submitted to Cryosphere)
  • Ng HC; Robinson LF; McManus JF; Mohamed KJ, Jacobel AW; Ivanovic RF; Gregoire LJ; Chen T. Coherent deglacial changes in deep Atlantic Ocean circulation. (Submitted to Nature Communications)

Publications