A5035271918- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Climate change and permafrost
- Archaeology and ancient environmental studies
- Botany and Plant Ecology Studies
- Tree-ring climate responses
- Lichen and fungal ecology
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Landslides and related hazards
- Cryospheric studies and observations
- Peatlands and Wetlands Ecology
- Paleontology and Stratigraphy of Fossils
- Polar Research and Ecology
- Historical and Cultural Archaeology Studies
- Indigenous Studies and Ecology
- Tree Root and Stability Studies
- Historical Geography and Cartography
- Architecture and Computational Design
- Image Processing and 3D Reconstruction
- Geomagnetism and Paleomagnetism Studies
- Environmental DNA in Biodiversity Studies
University of Bergen
2009-2023
Bjerknes Centre for Climate Research
2003-2023
Ollscoil na Gaillimhe – University of Galway
1993
Norwegian University of Science and Technology
1986
A unified scheme to assign pollen samples vegetation types was used reconstruct patterns north of 55°N at the last glacial maximum (LGM) and mid‐Holocene (6000 years B.P.). The data set assembled for this purpose represents a comprehensive compilation based on work many projects research groups. Five tundra (cushion forb tundra, graminoid prostrate dwarf‐shrub erect low‐ high‐shrub tundra) were distinguished mapped basis modern surface samples. tundra‐forest boundary distributions boreal...
A 24,000-year record of plant community dynamics, based on pollen and ancient DNA from the sediments (sedaDNA) Lake Bolshoye Shchuchye in Polar Ural Mountains, provides detailed information flora Last Glacial Maximum (LGM) also changes composition dominance. It greatly improves incomplete records short fragmented stratigraphic sequences found exposed sedimentary sections western Russian Arctic. In total, 162 taxa were detected by sedaDNA 115 analysis. Several shifts dominance between within...
Abstract A synthesis of the principal environmental changes that are inferred to have occurred in Norway and Svalbard (Fig. 1) during Late‐glacial period (14‐9 ka BP) is presented. The paper has three sections dealing separately with (I) western Norway, (II) northern (III) Spitsbergen, Svalbard. main conditions described include glacial events, sea‐level changes, vegetation history climatic variations. summary chart reconstructions presented for each areas, including a curve temperature...
Andøya on the NW coast of Norway is a key site for understanding Last Glacial Maximum (LGM) in northern Europe. Controversy has arisen concerning local conditions, especially about timing and extent glacial cover, maximum July temperatures whether pine and/or spruce could have grown there. We reviewed all existing data add newly analysed ancient sedimentary DNA (sedaDNA), pollen, macrofossils, geochemistry stable isotopes from three lake sediment cores Øvre Æråsvatnet. A total 23 new dates...
Pollen analysis from Sandvikvatn has elucidated the local Late Weichselian vegetational and climatic history since deglaciation about 14,000 B.P. The pleniglacial period, first of three main periods ending c. 13,600 B.P., is an Artemisia ‐dominated pioneer vegetation on disturbed mineral soils. Interstadial (13,600‐11,000 B.P.) comprises a Salix ‐shrub consolidation phase and, 12,900 birch‐forest optimum phase. In Younger Dryas Stadial (11,000–10,100 returns. Three oscillations are...
Abstract Palynological results from Liastemmen indicate a tripartite division of the Late Weichselian. In pleniglacial period, deglaciation ca. 14000 BP to 13000 BP, Artemisia ‐dominated pioneer vegetation on disturbed, mineral‐soil was strongly influenced by cold winters and katabatic winds. The Weichselian Interstadial (ca. BP‐ca. 11000 BP) comprises Salix ‐shrub consolidation phase, 12700 tree‐birch phase. last 500 years this period July January means are estimated about 16°C between −2°C...
Abstract Questions How open was the landscape prior to agriculture? Did agriculture start earlier in south than north? did vegetation change different regions after introduction of Location Coast SW and W Norway. Methods The REVEALS (Regional Estimates VEgetation Abundance from Large Sites) model is applied for pollen‐based reconstruction 19 time windows over last 9,000 years. Pollen data 63 sites (lakes bogs) are compiled systematically used analysis so that structure space captured....
ABSTRACT A detailed, well‐dated record of pollen and sedimentary ancient DNA ( sed aDNA) for the period 15 000–9500 cal a bp describes changes at Lake Bolshoye Shchuchye in Polar Ural Mountains, located far east classical Lateglacial sites western Europe. Arctic tundra rapidly changed to lusher vegetation, possibly including both dwarf Betula nana ) tree birch B. pubescens ), dated our take place 14 565 , coincident with onset Bølling Europe; this was paralleled by increased summer...
We describe glaci-lacustrine sediments buried under thick tills in Folldalen, south-east Norway, a site located close to the former centre of Scandinavian Ice Sheet. Thus, location implies that ice sheet had melted when were deposited. The exposed ground was occupied by arctic vegetation. best age estimate from 20 quartz luminescence dates is 55.6 ± 4.6 ka. Due possible incomplete bleaching, an younger part time range most probable. conclude Sheet almost completely away early Marine Isotope...
Abstract Sediment cores from lakes Kormovoye and Oshkoty in the glaciated region of Pechora Lowland, northern Russia, reveal sediment gravity flow deposits overlain by lacustrine mud gyttja. The sediments were deposited mainly during melting buried glacier ice beneath lakes. In Lake Kormovoye, differential dead caused lake bottom to subside at different places times, resulting sedimentation erosion occurring only some few metres apart shifting locations, as further inversion bottom. Basal...
A 22 m long sediment core from Lake Yamozero on the Timan Ridge in northern Russia has provided evidence of intriguing climatic shifts during last glacial cycle. An overall shallowing lake is reflected lower part cores, where pollen indicates a transition steppe vegetation to interstadial shrub‐tundra. These beds are capped by well‐defined layer compact clay deposited relatively deep water, shows surrounding spruce forests and warmer‐than‐present summer temperatures. The most conservative...
The result of 344 radiocarbon-dated megafossils is here presented and discussed. This study aims at elucidating early- to mid-Holocene forest-line climate dynamics in the southern Scandes along a present gradient decreasing elevations. Around 9.5 calibrated ka before (BP), pine suddenly established vertical belts least 200 m. These represent highest pine-forests during Holocene, ca. 210–170 m higher than today when corrected for land uplift. By this, summer temperatures 1–1.3°C warmer are...