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  • E-mailnil.irvali@uib.no
  • Phone+47 55 58 81 16
  • Visitor Address
    Allégaten 41
    Realfagbygget
    5007 Bergen
    Room 
    3A13d - 3113d
  • Postal Address
    Postboks 7803
    5020 Bergen

I am a Researcher in Paleoceanography at the Department of Earth Science, University of Bergen and the Bjerknes Centre for Climate Research. The main motivation of my research is to understand the mechanisms behind past changes in ocean circulation and climate during the current and previous warm periods, to provide a better understanding and improve the predictions of our future climate.

To accomplish this, I work with an array of proxy methodologies including foraminiferal assemblages, stable isotopes (e.g., planktonic and benthic foraminiferal δ18O and δ13C) and elemental ratios (e.g., Mg/Ca) to reconstruct surface and deep ocean properties, ice-rafted debris counts to reconstruct ice sheet variability, sortable silt analysis to reconstruct relative changes in paleo-current flow speed; combined with tephra, oceanic 13C Suess effect and SCP analysis for improving recent marine sediment core chronologies.

Academic article
  • Show author(s) (2022). The Sediment Green-Blue Color Ratio as a Proxy for Biogenic Silica Productivity Along the Chilean Margin. Geochemistry Geophysics Geosystems.
  • Show author(s) (2022). Revised ΔR values for the Barents Sea and its archipelagos as a pre-requisite for accurate and robust marine-based 14C chronologies. Quaternary Geochronology. 17 pages.
  • Show author(s) (2022). Deep submarine infiltration of altered geothermal groundwater on the south Chilean Margin. Communications Earth & Environment.
  • Show author(s) (2020). Interglacial instability of North Atlantic Deep Water ventilation. Science. 1485-1489.
  • Show author(s) (2020). A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene. Proceedings of the National Academy of Sciences of the United States of America. 190-195.
  • Show author(s) (2019). Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand. Nature Communications.
  • Show author(s) (2017). Environmental Controls on Mg/Ca in Neogloboquadrina incompta: A Core-Top Study From the Subpolar North Atlantic. Geochemistry Geophysics Geosystems. 4276-4298.
  • Show author(s) (2016). Evidence for regional cooling, frontal advances, and East Greenland Ice Sheet changes during the demise of the last interglacial. Quaternary Science Reviews. 184-199.
  • Show author(s) (2015). Deep Atlantic variability during the last interglacial period. Past Global Changes Magazine. 20-21.
  • Show author(s) (2014). Rapid reductions in North Atlantic Deep Water during the peak of the last Interglacial period. Science. 1129-1132.
  • Show author(s) (2012). Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e). Paleoceanography. 16 pages.
Report
  • Show author(s) (2019). Expedition 379T Preliminary Report, Digging Deeper with the JR100: Extending high resolution paleoclimate records from the Chilean Margin to the Eemian. .
Academic lecture
  • Show author(s) (2023). Unravelling the Link between Arctic-Atlantic Exchanges and Meridional Overturning Circulation during the last Deglaciation.
  • Show author(s) (2023). Holocene Natural Variability in Atlantic Water Inflow Properties to the Arctic.
  • Show author(s) (2022). Reconstructing natural variability of Atlantic Water inflow through the Holocene .
  • Show author(s) (2022). Labrador Sea paleoceanography and paleodiversity across the Last Interglacial.
  • Show author(s) (2022). Climate thresholds for south Greenland Ice Sheet demise: lessons from late Pleistocene interglacials .
  • Show author(s) (2021). Reconstructing natural variability of Atlantic Water inflow through the Holocene.
  • Show author(s) (2019). Variability in ocean ventilation during recent interglacial periods.
  • Show author(s) (2019). Variability in North Atlantic Deep Water Ventilation During Late Pleistocene Interglacials.
  • Show author(s) (2019). East Greenland Ice Sheet variability and thresholds through late Pleistocene interglacials .
  • Show author(s) (2018). North Atlantic Deep Water reductions a persistent feature of the last five interglacial periods.
  • Show author(s) (2018). East Greenland Ice Sheet variability and thresholds through late Pleistocene interglacials .
  • Show author(s) (2017). Resolving the phasing and forcing dynamics between North Atlantic climate and deep ocean circulation changes .
  • Show author(s) (2016). Natural variability in Nordic Seas overflows: Toward a mechanistic understanding of proxy records.
  • Show author(s) (2015). Subpolar gyre changes from the penultimate glaciation to glacial inception and their relationship to Nordic Seas exchanges.
  • Show author(s) (2015). Nordic Seas Overflows and Climate Variability Trough the Holocene.
  • Show author(s) (2015). Multiproxy evidence for Climate and North Atlantic Deep Water variability spanning the last two millennia.
  • Show author(s) (2015). Deep Atlantic circulation during the last interglacial period.
  • Show author(s) (2014). Rapid reductions in North Atlantic Deep Water during the last interglacial period.
  • Show author(s) (2014). North Atlantic Deep Water variability during the last two interglacial periods.
  • Show author(s) (2013). Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e).
  • Show author(s) (2012). Reductions in North Atlantic Deep Water in a warmer climate—lessons from the last interglacial.
  • Show author(s) (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial period and their relationship to Greenland Ice Sheet variability.
  • Show author(s) (2012). Nordic Seas overflows—the last two millennia.
  • Show author(s) (2012). 8.2 kyr-like deep ocean circulation changes during the last interglacial.
  • Show author(s) (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
  • Show author(s) (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
  • Show author(s) (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
  • Show author(s) (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
  • Show author(s) (2011). Abrupt changes in North Atlantic climate and hydrography and their relationship to Greenland Ice Sheet variability during the penultimate interglacial (MIS 5e).
  • Show author(s) (2011). Abrupt changes in North Atlantic climate and hydrography and their relationship to Greenaldn ice sheet variability during the penultimate interglacial (MIS 5e).
  • Show author(s) (2010). RG 1 Past warm climate.
  • Show author(s) (2010). Abrupt Changes in North Atlantic Climate and Hydrography and Their Relationship to Deep Ocean Ventilation During the Penultimate Interglacial (MIS 5e).
Doctoral dissertation
  • Show author(s) (2012). The relationship between climate, the Greenland Ice Sheet and Iceland-Scotland Overflow Water during the Penultimate Interglacial (MIS 5e).
Poster
  • Show author(s) (2023). Holocene natural variability in Atlantic Water inflow properties to the Arctic.
  • Show author(s) (2022). Revised marine reservoir offset (ΔR) values for molluscs and marine mammals for the archipelagos of Arctic North America and the Barents Sea.
  • Show author(s) (2022). Natural variability in the Atlantic Water inflow to the Arctic during the last deglaciation.
  • Show author(s) (2022). Holocene natural variability in Atlantic Water inflow properties to the Arctic.
  • Show author(s) (2022). Abrupt deglacial variations in the properties and vigor of the Atlantic Water inflow to the Arctic.
  • Show author(s) (2021). Variability in Atlantic Water inflow into the Arctic Ocean since the deglaciation.
  • Show author(s) (2021). Natural variability in the Atlantic Water inflow to the Arctic during the last deglaciation.
  • Show author(s) (2019). Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand.
  • Show author(s) (2019). A low climate threshold for south Greenland Ice Sheet demise during the late Pleistocene.
  • Show author(s) (2017). Centennial-millennial scale variations in Western Antarctic Ice Sheet discharge and their relationship to climate and ocean changes during the late Holocene.
  • Show author(s) (2017). Assessing linkages between ice sheet calving, subpolar gyre density and deep water ventilation during the last glaciation .
  • Show author(s) (2016). Thresholds for destabilizing thermohaline circulation and ocean carbon cycling in a warmer world (THRESHOLDS).
  • Show author(s) (2016). Resolving the phasing and forcing dynamics between North Atlantic climate and deep ocean circulation changes .
  • Show author(s) (2014). Ocean Drilling Program (ODP) Site 1233, SE Pacific Ocean: paleoclimatic reconstructions over Antarctic warming event 1.
  • Show author(s) (2013). Multi-proxy evidence for changes in subpolar North Atlantic surface ocean hydrography and climate during the last interglacial.
  • Show author(s) (2013). Interglacial deep ocean instability.
  • Show author(s) (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial and their relationship to the Greenland ice sheet.
  • Show author(s) (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial and their relationship to the Greenland ice sheet.
  • Show author(s) (2012). New sedimentary constraints for changes in Iceland-Scotland Overflow Water linked to North Atlantic climate variability during the last interglacial period.
  • Show author(s) (2012). New sedimentary constraints for changes in Iceland-Scotland Overflow Water linked to North Atlantic climate variability during the last interglacial period.
  • Show author(s) (2012). Large centennial-scale North Atlantic Deep Water reductions during the peak of the last interglacial period.
  • Show author(s) (2011). Abrupt changes in North Atlantic Climate and hydrography and their relationship to deep ocean ventilation during the penultimate interglacial (MIS 5e).
  • Show author(s) (2010). The relationship between North Atlantic Deep Water (NADW), climate, and the Greenland Ice Sheet during the Penultimate Interglacial (MIS 5e).
  • Show author(s) (2010). Rapid Centennial Scale Reductions in North Atlantic Deep Water During the Peak of the Last Interglacial Period.
  • Show author(s) (2009). The Relationship between North Atlantic Deep Water (NADW), climate and the Greenland Ice Sheet during the Penultimate Interglacial (MIS 5e).

More information in national current research information system (CRIStin)

Recent selected publications are listed below. For more information please see my Google Scholar profile, ResearchGate or CRIStin.

Irvalı, N., Ninnemann, U. S., Olsen, A., Rose, N. L., Thornalley, D. J. R., Mjell, T. L., and Counillon, F. 2023: Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study, EGUsphere [preprint], DOI: 10.5194/egusphere-2023-2845

Irvalı, N., Galaasen, E. V., Ninnemann, U. S., Rosenthal, Y., Born, A., and Kleiven, H. F. 2020: A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene. Proceedings of the National Academy of Sciences, 117, 190-195. DOI:10.1073/pnas.1911902116

Galaasen, E. V., Ninnemann, U. S., Kessler, A., Irvalı, N., Rosenthal, Y., Tjiputra, J., Bouttes, N., Roche, D. M., Kleiven, H. F. and Hodell, D. A. 2020. Interglacial instability of North Atlantic Deep Water ventilation. Science, 367, 1485-1489. DOI:10.1126/science.aay6381

Rohling, E. J., Hibbert, F. D., Grant, K. M., Galaasen, E. V., Irvalı, N., Kleiven, H. F., Marino, G., Ninnemann, U., Roberts, A. P., Rosenthal, Y., Schulz, H., Williams, F. H. and Yu, J. 2019: Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand. Nature Communications, 10,5040. DOI: 10.1038/s41467-019-12874-3

 

 

 

Current projects:

2023-2024 Fly Ash – Using global Anthropogenic signals to link modern observations and past reconstructions, University of Bergen L. Meltzers Høyskolefond Research Funds; Role: PI

2022-2025 Dynamics of the North Atlantic surface and overturning circulation (DYNASOR) (PI: Andreas Born, GEO) (SKD Strategic project); Role: WP leader

2022-2025 Proxy assimilation for reconstructing climate and improving model (PARCIM) (PI: Francois Counillon, NERSC) (SKD Strategic project); Role: Researcher

2018-2024 The Nansen Legacy (Arven etter Nansen, AeN) (PI: Marit Reigstad, UiT); Role: Researcher

 

Previous projects:

2016-2018 Thresholds for destabilizing thermohaline circulation and ocean carbon cycling in a warmer world (THRESHOLDS) (Research Council of Norway project; PI: Ulysses S. Ninnemann, GEO); Role: Researcher

2016 Resolving the phasing and forcing dynamics between North atlantic climate and deep circulation changes (CLIMADEEP), Bjerknes Centre for Climate Research Fast-Track Initiative Grant; Role: PI

2014-2016 Subpolar North Atlantic Climate States (SNACS) (Research Council of Norway project; PI: Are Olsen, GFI); Role: Researcher

2011-2014 North Atlantic Ocean-Climate Variability in a Warmer World (NOCWARM) (Research Council of Norway project; PI: Kikki Kleiven, GEO); Role: Researcher

2010-2014 EU-FP7 Past4Future; Role: Researcher in WP4.3 "Quantifying and modelling ocean circulation variability and impacts during warm climates"

2008-2012 Atlantic Meridional Overturning Circulation During Interglacials (AMOCINT) (European Science Foundation, EuroMARC Program; PI: Eystein Jansen, GEO); Role: Research fellow/PhD Candidate

 

 

 

Short CV

Education

2012    PhD, Marine Geology & Geophysics, Department of Earth Science, University of Bergen, Bergen, Norway

2008    MSc, Climate and Marine Sciences, Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey

2006    Bachelor’s degree, Geological Engineering, Faculty of Mines, Istanbul Technical University, Istanbul, Turkey

Professional Experience

2014-: Researcher, Department of Earth Science, University of Bergen

2012-2014: Researcher, NORCE Norwegian Research Centre, Bergen, Norway

2008-2012: PhD Candidate, NORCE Norwegian Research Centre, Bergen, Norway

2006-2008: Research assistant, Eastern Mediterranean Centre for Oceanography & Limnology (EMCOL), Eurasia Institute of Earth Sciences, Istanbul Technical University, Istanbul, Turkey

2005: Intern, Bjerknes Centre for Climate Research, University of Bergen (IAESTE Trainee)

Awards, Fellowships, Prizes

2023    University of Bergen L. Meltzers Høyskolefond, Research funds

2017    University of Bergen L. Meltzers Høyskolefond Academic travel funds

2016    Bjerknes Centre for Climate Research, Fast-Track Initiative Grant

2010    Research Council of Norway, Leiv Eiriksson Mobility Grant

2009    European Science Foundation, EuroMARC Short Term Visit Grant

2006    Istanbul Technical University, Geological Engineering Department, 1st degree Graduation Award

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