Blar i Bergen Open Research Archive på forfatter "Kleiven, Helga Flesche"
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Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand
Rohling, E.J.; Hibbert, F.D.; Grant, K.M.; Galaasen, Eirik Vinje; Irvali, Nil; Kleiven, Helga Flesche; Marino, G.; Ninnemann, Ulysses S; Roberts, A.P.; Rosenthal, Y.; Schulz, H.; Williams, F.H.; Yu, J. (Peer reviewed; Journal article, 2019-11-06)The last interglacial (LIG; ~130 to ~118 thousand years ago, ka) was the last time global sea level rose well above the present level. Greenland Ice Sheet (GrIS) contributions were insufficient to explain the highstand, ... -
Evidence for regional cooling, frontal advances, and East Greenland Ice Sheet changes during the demise of the last interglacial
Irvali, Nil; Ninnemann, Ulysses Silas; Kleiven, Helga Flesche; Galaasen, Eirik Vinje; Morley, Audrey; Rosenthal, Yair (Peer reviewed; Journal article, 2016)High-resolution lithic and sea surface climate records are used to portray the progression of North Atlantic climate, hydrography, and Greenland Ice Sheet (GIS) activity through the peak of Marine Isotope Stage (MIS) 5e ... -
A low climate threshold for south Greenland Ice Sheet demise during the Late Pleistocene
Irvali, Nil; Galaasen, Eirik Vinje; Ninnemann, Ulysses S; Rosenthal, Yair; Born, Andreas; Kleiven, Helga Flesche (Peer reviewed; Journal article, 2020-01-07)The Greenland Ice Sheet (GIS) has been losing mass at an accelerating rate over the recent decades. Models suggest a possible temperature threshold between 0.8 and 3.2 °C, beyond which GIS decline becomes irreversible. The ... -
Multidecadal changes in Iceland Scotland Overflow Water vigor over the last 600 years and its relationship to climate
Mjell, Tor Lien; Ninnemann, Ulysses Silas; Kleiven, Helga Flesche; Hall, Ian R. (Peer reviewed; Journal article, 2016-03)Changes in the Atlantic Meridional Overturning Circulation (AMOC) have commonly been invoked to explain the low-frequency climate changes evident over millennial-multidecadal timescales during the Holocene period. While ... -
Using simulations of the last millennium to understand climate variability seen in palaeo-observations: Similar variation of Iceland-Scotland overflow strength and Atlantic Multidecadal Oscillation
Lohmann, Katja; Mignot, Juliette; Langehaug, Helene Reinertsen; Jungclaus, Johann H.; Matei, Daniela; Otterå, Odd Helge; Gao, Yongqi; Mjell, Tor Lien; Ninnemann, Ulysses Silas; Kleiven, Helga Flesche (Peer reviewed; Journal article, 2015-02-10)A recent palaeo-reconstruction of the strength of the Iceland–Scotland overflow during the last 600 years suggests that its low-frequency variability exhibits strong similarity with palaeo-reconstructions of the Atlantic ...