Nil Irvali
Stilling
Forsker
Forskergrupper
Forskning
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.
Publikasjoner
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. 2024: Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study on the oceanic 13C Suess effect. Geochronology, 6, 449–463. DOI: 10.5194/gchron-6-449-2024
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
Prosjekter
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