- E-postnil.irvali@uib.no
- Telefon+47 55 58 81 16
- BesøksadresseAllégaten 41Realfagbygget5007 BergenRom3A13d - 3113d
- PostadressePostboks 78035020 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.
- (2022). The Sediment Green-Blue Color Ratio as a Proxy for Biogenic Silica Productivity Along the Chilean Margin. Geochemistry Geophysics Geosystems.
- (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 sider.
- (2022). Deep submarine infiltration of altered geothermal groundwater on the south Chilean Margin. Communications Earth & Environment.
- (2020). Interglacial instability of North Atlantic Deep Water ventilation. Science. 1485-1489.
- (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.
- (2019). Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand. Nature Communications.
- (2017). Environmental Controls on Mg/Ca in Neogloboquadrina incompta: A Core-Top Study From the Subpolar North Atlantic. Geochemistry Geophysics Geosystems. 4276-4298.
- (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.
- (2015). Deep Atlantic variability during the last interglacial period. Past Global Changes Magazine. 20-21.
- (2014). Rapid reductions in North Atlantic Deep Water during the peak of the last Interglacial period. Science. 1129-1132.
- (2012). Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e). Paleoceanography. 16 sider.
- (2019). Expedition 379T Preliminary Report, Digging Deeper with the JR100: Extending high resolution paleoclimate records from the Chilean Margin to the Eemian. .
- (2023). Unravelling the Link between Arctic-Atlantic Exchanges and Meridional Overturning Circulation during the last Deglaciation.
- (2023). Holocene Natural Variability in Atlantic Water Inflow Properties to the Arctic.
- (2022). Reconstructing natural variability of Atlantic Water inflow through the Holocene .
- (2022). Labrador Sea paleoceanography and paleodiversity across the Last Interglacial.
- (2022). Climate thresholds for south Greenland Ice Sheet demise: lessons from late Pleistocene interglacials .
- (2021). Reconstructing natural variability of Atlantic Water inflow through the Holocene.
- (2019). Variability in ocean ventilation during recent interglacial periods.
- (2019). Variability in North Atlantic Deep Water Ventilation During Late Pleistocene Interglacials.
- (2019). East Greenland Ice Sheet variability and thresholds through late Pleistocene interglacials .
- (2018). North Atlantic Deep Water reductions a persistent feature of the last five interglacial periods.
- (2018). East Greenland Ice Sheet variability and thresholds through late Pleistocene interglacials .
- (2017). Resolving the phasing and forcing dynamics between North Atlantic climate and deep ocean circulation changes .
- (2016). Natural variability in Nordic Seas overflows: Toward a mechanistic understanding of proxy records.
- (2015). Subpolar gyre changes from the penultimate glaciation to glacial inception and their relationship to Nordic Seas exchanges.
- (2015). Nordic Seas Overflows and Climate Variability Trough the Holocene.
- (2015). Multiproxy evidence for Climate and North Atlantic Deep Water variability spanning the last two millennia.
- (2015). Deep Atlantic circulation during the last interglacial period.
- (2014). Rapid reductions in North Atlantic Deep Water during the last interglacial period.
- (2014). North Atlantic Deep Water variability during the last two interglacial periods.
- (2013). Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e).
- (2012). Reductions in North Atlantic Deep Water in a warmer climate—lessons from the last interglacial.
- (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial period and their relationship to Greenland Ice Sheet variability.
- (2012). Nordic Seas overflows—the last two millennia.
- (2012). 8.2 kyr-like deep ocean circulation changes during the last interglacial.
- (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
- (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
- (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
- (2011). Rapid centennial scale reductions in North Atlantic Deep Water during the peak of the last interglacial period.
- (2011). Abrupt changes in North Atlantic climate and hydrography and their relationship to Greenland Ice Sheet variability during the penultimate interglacial (MIS 5e).
- (2011). Abrupt changes in North Atlantic climate and hydrography and their relationship to Greenaldn ice sheet variability during the penultimate interglacial (MIS 5e).
- (2010). RG 1 Past warm climate.
- (2010). Abrupt Changes in North Atlantic Climate and Hydrography and Their Relationship to Deep Ocean Ventilation During the Penultimate Interglacial (MIS 5e).
- (2012). The relationship between climate, the Greenland Ice Sheet and Iceland-Scotland Overflow Water during the Penultimate Interglacial (MIS 5e).
- (2023). Holocene natural variability in Atlantic Water inflow properties to the Arctic.
- (2022). Revised marine reservoir offset (ΔR) values for molluscs and marine mammals for the archipelagos of Arctic North America and the Barents Sea.
- (2022). Natural variability in the Atlantic Water inflow to the Arctic during the last deglaciation.
- (2022). Holocene natural variability in Atlantic Water inflow properties to the Arctic.
- (2022). Abrupt deglacial variations in the properties and vigor of the Atlantic Water inflow to the Arctic.
- (2021). Variability in Atlantic Water inflow into the Arctic Ocean since the deglaciation.
- (2021). Natural variability in the Atlantic Water inflow to the Arctic during the last deglaciation.
- (2019). Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand.
- (2019). A low climate threshold for south Greenland Ice Sheet demise during the late Pleistocene.
- (2017). Centennial-millennial scale variations in Western Antarctic Ice Sheet discharge and their relationship to climate and ocean changes during the late Holocene.
- (2017). Assessing linkages between ice sheet calving, subpolar gyre density and deep water ventilation during the last glaciation .
- (2016). Thresholds for destabilizing thermohaline circulation and ocean carbon cycling in a warmer world (THRESHOLDS).
- (2016). Resolving the phasing and forcing dynamics between North Atlantic climate and deep ocean circulation changes .
- (2014). Ocean Drilling Program (ODP) Site 1233, SE Pacific Ocean: paleoclimatic reconstructions over Antarctic warming event 1.
- (2013). Multi-proxy evidence for changes in subpolar North Atlantic surface ocean hydrography and climate during the last interglacial.
- (2013). Interglacial deep ocean instability.
- (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial and their relationship to the Greenland ice sheet.
- (2012). Rapid reductions in North Atlantic Deep Water during the last interglacial and their relationship to the Greenland ice sheet.
- (2012). New sedimentary constraints for changes in Iceland-Scotland Overflow Water linked to North Atlantic climate variability during the last interglacial period.
- (2012). New sedimentary constraints for changes in Iceland-Scotland Overflow Water linked to North Atlantic climate variability during the last interglacial period.
- (2012). Large centennial-scale North Atlantic Deep Water reductions during the peak of the last interglacial period.
- (2011). Abrupt changes in North Atlantic Climate and hydrography and their relationship to deep ocean ventilation during the penultimate interglacial (MIS 5e).
- (2010). The relationship between North Atlantic Deep Water (NADW), climate, and the Greenland Ice Sheet during the Penultimate Interglacial (MIS 5e).
- (2010). Rapid Centennial Scale Reductions in North Atlantic Deep Water During the Peak of the Last Interglacial Period.
- (2009). The Relationship between North Atlantic Deep Water (NADW), climate and the Greenland Ice Sheet during the Penultimate Interglacial (MIS 5e).
Se fullstendig oversikt over publikasjoner i 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