- E-postnil.irvali@uib.no
- Telefon+47 55 58 81 16
- BesøksadresseAllégaten 41Realfagbygget5007 BergenRom3A13d - 3113d
- PostadressePostboks 78035020 Bergen
My research focuses on improving our understanding of past changes in properties and intensity of Nordic Seas overflows and their relationship to climate and surface ocean hydrography on decadal-centennial timescales during warm and warmer-than-present climate states. I work with an array of proxy methodologies including stable isotopes (planktonic and benthic d18O and d13C), ice-rafted debris (IRD) counts, tephra counts, foraminiferal assemblages, sea surface temperature reconstructions using both the Mg/Ca paleothermomery and transfer function techniques (e.g., MAT), applied on a variety of IMAGES, Ocean Drilling Program (ODP) and International Ocean Discovery Program (IODP) cores, particularly from the North Atlantic sedimentary drift sites (e.g., Eirik and Gardar Drifts).
- (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. .
- (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).
- (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).
Current projects:
Dynamics of the North Atlantic surface and overturning circulation (DYNASOR) (PI: Andreas Born, GEO) (SKD Strategic project 2022-2025): https://bjerknes.uib.no/en/article/project/strategic-projects-2022-2025)
Proxy assimilation for reconstructing climate and improving model (PARCIM) (PI: Francois Counillon, NERSC) (SKD Strategic project 2022-2025): https://bjerknes.uib.no/en/article/project/strategic-projects-2022-2025
The Nansen Legacy (Arven etter Nansen, AeN) (PI: Marit Reigstad, UiT): https://arvenetternansen.com/
Previous projects that I have been involved in/contributed to:
Thresholds for destabilizing thermohaline circulation and ocean carbon cycling in a warmer world (THRESHOLDS) (Research Council of Norway project; PI: Ulysses S. Ninnemann, GEO)
Subpolar North Atlantic Climate States (SNACS) (Research Council of Norway project; PI: Are Olsen, GFI)
North Atlantic Ocean-Climate Variability in a Warmer World (NOCWARM) (Research Council of Norway project; PI: Kikki Kleiven, GEO)
Atlantic Meridional Overturning Circulation During Interglacials (AMOCINT) (European Science Foundation, EuroMARC Program; PI: Eystein Jansen, GEO)
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, Turkey
2005: Intern, Bjerknes Centre for Climate Research, University of Bergen (IAESTE Trainee)