A5016753114- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Climate change and permafrost
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Archaeology and ancient environmental studies
- Geological formations and processes
- Winter Sports Injuries and Performance
- Geological Studies and Exploration
- Polar Research and Ecology
- Groundwater and Isotope Geochemistry
- Geophysics and Gravity Measurements
- Pleistocene-Era Hominins and Archaeology
- Geological Formations and Processes Exploration
- Planetary Science and Exploration
- Geomagnetism and Paleomagnetism Studies
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Astro and Planetary Science
- Forensic and Genetic Research
Stockholm University
2022-2024
Bolin Centre for Climate Research
2023-2024
Geological Survey of Sweden
2020-2023
Bjerknes Centre for Climate Research
2018-2021
University of Bergen
2018-2021
ENEA Saluggia Research Centre
2021
National Agency for New Technologies, Energy and Sustainable Economic Development
2021
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...
Extensive glacial lakes dammed in the Scandinavian Mountains during retreat of last Ice Sheet were first hypothesised over a century ago. Here, using high-resolution LiDAR, we report >4500 relict shorelines, deltas and palaeo-channels related to ice-dammed ∼30 000 km2 area central Jämtland, west-central Sweden. Shorelines occur as flights on valley sides, consequence sequential lowering palaeo-lake levels ice margin lower threshold outlets becoming ice-free. Based extent elevation identify...
Our knowledge about the glaciation history in Russian Arctic has to a large extent been based on geomorphological mapping supplemented by studies of short stratigraphical sequences found exposed sections. Here we present new geochronological data from Polar Ural Mountains along with high‐resolution sediment record Bolshoye Shchuchye, largest and deepest lake mountain range. Seismic profiles show that contains 160‐m‐thick sequence unconsolidated lacustrine sediments. A well‐dated 24‐m‐long...
Ice-dammed lakes expedite glacier retreat, leading to the expansion of and an elevated risk Glacial Lake Outburst Floods (GLOFs), delay freshwater inflow ocean. The escalating number ice-dammed in Greenland, High Mountain Asia, Patagonia, driven by swift retreat glaciers amid rapid warming, poses a significant threat natural disasters. Despite extensive research on marine-terminating glaciers, dynamics lacustrine-terminating remain poorly understood. Geological evidence indicates...
<p>Locations and settings of core sites, methods sediment details, AMS 14C dates, age modeling details OxCal code for all models, hydrological model revised ages key STS events. </p>
<p>Locations and settings of core sites, methods sediment details, AMS 14C dates, age modeling details OxCal code for all models, hydrological model revised ages key STS events. </p>
We present geomorphological evidence of large, previously undocumented, early Holocene ice-dammed lakes in the Scandinavian Mountains northwestern Sweden. The extents indicate that last remnants Ice Sheet were located east mountain range. Some pioneering works have presented similar reconstructions, whereas more recently published reconstructions place ice high mountains Sarek. Using high-resolution airborne LiDAR data we mapped a large number hitherto undocumented shorelines some main...
Tephra shards from the Vedde Ash eruption have been identified in two lakes northwestern Russia and Polar Ural Mountains. This is most distal easternmost occurrence of this regional tephra marker horizon found so far it extends area more than 1700 km further east previously documented. means that particles size fine sand travelled 4000 Katla volcano source, south Iceland. These findings offer a new possibility to correlate archives over very long distance time period around Younger Dryas.
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 present a well‐dated, high‐resolution and continuous sediment record spanning the last c . 24 000 years from lake Bolshoye Shchuchye located in Polar Ural Mountains, Arctic Russia. This is first succession reaching back into Last Glacial Maximum ( LGM ) ever retrieved this region. reconstruct glacial climate history area since based on sedimentological geochemical analysis of 24‐m‐long core. A robust chronology was established using combination AMS 14 C‐dating, position Vedde Ash varve...
The Baltic Ice Stream, a large fast‐flowing sector of the last Fennoscandian Sheet that occupied present‐day Sea basin, was first conceptualized in earliest days glacial geological research Scandinavia. Landform and sedimentological evidence from terrestrial margins support concept numerical ice‐sheet models demonstrate its existence possible evolution. However, with for Stream thus far limited to periphery, true form, scale, function, role deglaciation have proven enigmatic. Here we present...
This study shows the occurrence of numerous iceberg imprints on bottom former ice-dammed lakes in Härjedalen, west-central Sweden. Discussion genesis so-called "impact crater" known as Tor structure at Torbygget, which is located this area, motivated an examination area using high-resolution digital elevation models. Previous investigations have suggested that crater was created by a meteorite impact about 2000 years ago, forming semi-round depression. The results our investigation clearly...
ABSTRACT The Russian Arctic is an extensive region, with relatively few long‐duration paleoclimate reconstructions compared to other terrestrial regions. We present a 24 000‐year reconstruction of climate in the Polar Ural Mountains using n ‐alkanoic acid hydrogen isotopes from Lake Bolshoye Shchuchye. Major last deglaciation changes North Atlantic are this record, including transitions associated Bølling–Allerød, Younger Dryas and Holocene. However, magnitude isotopic shifts at Shchuchye...
Understanding past responses of ice sheets to climate change provides an important long‐term context for observations present day, and projected future, ice‐sheet change. In this work, we reconstruct the deglaciation marine‐terminating western margin Scandinavian Ice Sheet in outer Hardangerfjorden area southwestern Norway, following Last Glacial Maximum (LGM) until start Holocene. We base our interpretations on a combination geomorphological mapping using high‐resolution (LiDAR) terrain...
Fluids migrating through marine sediments can transport dissolved materials and influence the seafloor morphology. Terraces formed in varved glacial clay, observed of Stockholm Archipelago other locations around Baltic Sea, have been hypothesized to result from submarine groundwater discharge (SGD). Here we revisit this hypothesis by investigating potential links between SGD mapped terraces area Fifång Island, Southern Archipelago. We analyse 222Rn activity porewater geochemistry both...
Ice-dammed lakes expedite glacier retreat, leading to the expansion of and an elevated risk Glacial Lake Outburst Floods (GLOFs), delay freshwater inflow ocean. The escalating number ice-dammed in Greenland, High Mountain Asia, Patagonia, driven by swift retreat glaciers amid rapid warming, poses a significant threat natural disasters. In geological record, evidence indicates Fennoscandian ice sheet, marked formation, expansion, drainage large (10s-1000s km2 surface area up 100s m deep)...
ABSTRACT Based on radiocarbon dating, a tephra horizon, varve counts and palaeomagnetism, detailed age models covering the last ~24 k cal bp , have been developed for stratigraphy in lakes Bolshoye Shchuchye Maloye Polar Ural Mountains, Russia. The inclination curves from these show nearly identical palaeomagnetic secular variations studied cores both lakes, allowing precise correlation between cores. A large very distinct deviation, named Event, was identified all retrieved lakes. It lasted...