Øystein S. Lohne

• PhD
• Geologist at Sweco Norway

Our knowledge about the glaciation history in the Russian Arctic has to a large extent been based on geomorphological mapping supplemented by studies of short stratigraphical sequences found in exposed sections. Here we present new geochronological data from the Polar Ural Mountains along with a high‐resolution sediment record from Bolshoye Shchuch...

Distinct Younger Dryas (YD) moraines are mapped more-or-less continuously around the Scandinavian Ice Sheet. In most areas there is no evidence to suggest that a glacial re-advance took place during the YD, either because it did not happen or because older deposits have been removed by glacial erosion. In contrast we here present 90 radiocarbon dat...

We present a new time-slice reconstruction of the Eurasian ice sheets (British–Irish, Svalbard–Barents–Kara Seas and Scandinavian) documenting the spatial evolution of these interconnected ice sheets every 1000 years from 25 to 10 ka, and at four selected time periods back to 40 ka. The time-slice maps of ice-sheet extent are based on a new Geograp...

DATED-1 comprises a compilation of dates related to the build-up and retreat of the Eurasian (British-Irish, Scandinavian, Svalbard-Barents-Kara Seas) Ice Sheets, and time-slice maps of the Eurasian Ice sheet margins. Dates are sourced from the published literature. Ice margins are based on published geological and chronological data and include un...

From Kråkenes Lake in western Norway there exist 118 accelerator mass spectrometry 14C dates for the time interval 12 000–8000 14C a BP that we earlier calibrated using the IntCal09 data set. These yielded the most accurate and precise ages available for the Younger Dryas boundaries and the Vedde and Saksunarvatn ashes. Here we present a new calibr...

We present 34 new cosmogenic 10Be exposure ages that constrain the Lateglacial (Bølling–Preboreal) history of the Scandinavian Ice Sheet in the Lysefjorden region, south-western Norway. We find that the classical Lysefjorden moraines, earlier thought to be entirely of Younger Dryas age, encompass three adjacent moraines attributed to at least two i...

The Greenland ice cores with the GICC05 chronology represent a standard for late Quaternary climate events and their ages, whereas many other palaeoclimatic archives are dependent on 14 C dates. It is therefore critical to know if the ice-core and the calibrated 14 C chronologies are identical, and if not to quantify the offset between them. We pre...

The Greenland Ice Core chronology was constructed by counting annual layers and represents a standard for past climate events. However, almost all records from the continents and oceans are dated with the 14C method. It is therefore crucial to know if the Greenland Ice Core (GICC05) and the calibrated 14C time scales are identical and if not, to qu...

New time-slice reconstructions of the Eurasian Ice Sheet limits reveal that the timing of both the maximum ice sheet extent and the subsequent retreat were spatially variable. This variability most likely reflects regional contrasts in geographic setting, internal ice sheet dynamics and the forcing mechanisms. Here we report fresh results from an o...

A new palaeoenvironmental model for the evolution of the Byzovaya Palaeolithic site, northern Russia. Boreas, Vol. 41, pp. 527–545. 10.1111/j.1502-3885.2012.00259.x. ISSN 0300-9483. Recently, the sediment stratigraphy and geochronology of the well-known Palaeolithic site Byzovaya in northern Russia were investigated. New technological analyses of t...

The Vedde Ash is the most important volcanic event marker layer for the correlation of Late Quaternary palaeoenvironmental archives in Europe and the North Atlantic. First defined from its type site localities near ålesund, Western Norway, the Vedde Ash has now been traced across much of northern and central Europe, into northwest Russia, within No...

We present a new regional calibration of the 10Be production rate from two well-dated surfaces in southern Norway: a rock avalanche with 14C-dated wood and a precisely dated Younger Dryas moraine. Calculated 10Be production rates are 4.26 ± 0.13 and 4.65 ± 0.14 at g−1 a−1 for the Lal/Stone and Lifton scaling models, respectively. Our regional produ...

This study precisely constrains the timing of the Younger Dryas (YD) glacial maximum in south-western Norway by utilizing sediment records from lake basins. Two of the basins, located on the distal side of the mapped Herdla–Halsnøy Moraine, received meltwater directly from the ice sheet only when the ice margin reached its maximum extent during the...

The Scandinavian Ice Sheet formed around 12.6 Ma and expanded considerably from 2.7 Ma. During the Weichselian the western margin reached the coast during Marine Isotope Stage (MIS) 5d and the continental shelf during MIS 5b, MIS 4 and MIS 2. It was almost gone during MIS 5c and 5a, and was much reduced during periods of MIS 3, notably the Ålesund...

Models of the evolving paleo-topography of the continents and paleo-bathymetry of the oceans, together with the evolving ``masks'' of the land-sea and surface albedo distributions, are required inputs for the application of modern coupled climate models in the reconstruction of past climate conditions. Previous reconstructions in the ICE-NG (VMX) s...

A lake coring campaign in the Polar Urals is carried out within the framework of the Norwegian-Russian IPY-project ``The Ice Age Development and Human Settlement in Northern Eurasia'' (ICEHUS). The overall aim of the project is to improve the description and understanding of the Late Quaternary environmental and climate changes in the Russian Arcti...

Crucial to dating moraines and other deposits with 10Be exposure dating on millennial or sub-millennial timescales are the suppression of systematic uncertainties. While measurement precision has improved recently, uncertainties in the production rate of 10Be have lagged behind and hindered potential comparisons of moraine exposure ages with high-r...

We compiled a database and a GIS with dates and geomorphologic features that are relevant for the Eurasian ice sheets through the Last Glacial Maximum and the following deglaciation. All elements incorporated in the database are from published sources. Based on this database (called DATED), we made time-slice reconstructions of the Eurasian ice she...

About 25-26ka cal BP, the Scandinavian Ice Sheet merged with the British Ice Sheet on the continental shelf in the northern part of the North Sea (Sejrup et al., 2009). The Norwegian Channel, that hosted a major ice stream, became finally deglaciated at around 18.5ka cal BP. The deglaciation of western Norway started first in the south and not late...

Hardangerfjorden is up to 900 m deep and about 170 km long. The well defined Younger Dryas (YD) end moraine is located 40 km inside the fjord mouth. Lateral moraines show that the surface gradient near the ice front was steep and the glacier was grounded. These moraines can be traced up to 1000 m a.s.l. about 40 km inland, where the fjord is 600 m...

Romundset, A., Lohne, Ø. S., Mangerud, J. & Svendsen, J. I. 2009: The first Holocene relative sea-level curve from the middle part of Hardangerfjorden, western Norway. Boreas, 10.1111/j.1502-3885.2009.00108.x. ISSN 0300-9483. The first relative sea-level (RSL) curve from the mid-Hardangerfjorden area covering the entire Holocene is presented. The c...

We present results for a new high-resolution glaciologically-self-consistent deglacial history for the Eurasian ice complex including iceberg/meltwater drainage components. The history is derived from ongoing calibration of the MUN/UofT Glacial Systems Model against a large set of Relative Sea Level data and against margin chronologies inferred on...

The increasing resolution of ice sheet models demands more detailed data for constraining and for comparison of results. Important data for this include ice sheet chronology, bed conditions and topography. We address this by compiling published data into three new constraining data sets. The Eurasian ice sheet chronology is reconstructed in our dat...

A lake coring campaign in the Polar Urals is carried out within the framework of the Russian-Norwegian IPY-project "The Ice Age Development and Human Settlement in Northern Eurasia" (ICEHUS). The purpose is to improve the description and understanding of the Late Quaternary glacial and climate changes in this part of the Russian Arctic. Sediment co...

After the first emergence following deglaciation, relative sea level rose by 10 m in western Norway and culminated late in the Younger Dryas (YD). The relative sea-level history, reconstructed by dating deposits in isolation basins, shows a sea-level low-stand between $13 640 and 13 080 cal yr BP, a 10 m sea-level rise between $13 080 and 11 790 ca...

The goal of the ongoing project DATED is to describe and document the ice growth towards the LGM and the deglaciation of the large ice sheets in northwest Eurasia. Digitized ice margins and other relevant published features are compiled in a geographical information system, which is coupled to a database with dates (14C, OSL, TL, cosmogenic exposur...

Two well dated lateglacial relative sea-level curves have been constructed from Hordaland, western Norway, by the isolation basin method. The easternmost curve is based on six basins from the Os area, close to the Younger Dryas (YD) ice-sheet margin, at a YD isobase of 58 m a.s.l. The western curve was constructed at a site 20 km further west, at a...

Coastal fen- and lake deposits enclose sand layers that record at least three Holocene tsunamis at the Shetland Islands. The oldest is the well-known Storegga tsunami (ca 8100 cal yr BP), which at the Shetlands invaded coastal lakes and ran up peaty hillsides where it deposited sand layers up to 9.2m above present high tide level. Because sea level...

A detailed shoreline displacement curve documents the Younger Dryas transgression in western Norway. The relative sea‐level rise was more than 9 m in an area which subsequently experienced an emergence of almost 60 m. The sea‐level curve is based on the stratigraphy of six isolation basins with bedrock thresholds. Effort has been made to establish...

One of the largest Holocene sub-marine slides mapped on Earth is the Storegga slide offshore Norway [Bugge, 1987] (Figure 1). Approximately 3500 km3 material slid out and generated a huge tsunami dated to about 7300 14C yr BP [Bondevik et al., 1997a], or ca 8150 calendar years BP. The tsunami is known from onshore deposits in Norway [Bondevik et al...

The Shetland Islands lie to the north of the mainland of Great Britain and investigation in low-lying coastal lake basins has revealed a body of evidence relating to tsunami inundation and sedimentation throughout the Holocene. Detailed lithostratigraphical and biostratigraphical analyses, supported by AMS dating of plant macrofossils preserved wit...