A5037528768- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Cryospheric studies and observations
- Marine and environmental studies
- Climate change and permafrost
- Marine Biology and Ecology Research
- Polar Research and Ecology
- Paleontology and Stratigraphy of Fossils
- Indigenous Studies and Ecology
- Hydrocarbon exploration and reservoir analysis
- Marine animal studies overview
- Geological formations and processes
- Archaeology and ancient environmental studies
- Radioactive contamination and transfer
- Environmental DNA in Biodiversity Studies
- Microplastics and Plastic Pollution
- Geophysics and Gravity Measurements
- Freezing and Crystallization Processes
- Arctic and Russian Policy Studies
Adam Mickiewicz University in Poznań
2021-2024
University Centre in Svalbard
2023
Norwegian Polar Institute
2020-2021
Bangor University
2009-2018
MacEwan University
2016-2018
University of Alberta
2010-2012
Abstract. Biogeochemical cycling in the semi-enclosed Arctic Ocean is strongly influenced by land–ocean transport of carbon and other elements vulnerable to environmental climate changes. Sediments are an important part biogeochemical provide opportunity study present historical input fate organic matter (e.g., through permafrost thawing). Comprehensive sedimentary records required compare differences between regions budgets. To this end, Circum-Arctic Sediment CArbon DatabasE (CASCADE) was...
Abstract. Morphologically similar benthic foraminiferal taxa can be difficult to separate. Aside from causing issues in taxonomy, incorrect identifications complicate our understanding of species-specific ecological preferences and result flawed palaeoenvironmental reconstructions geochemical results. Over the years, a number studies have grouped together several key Arctic–North Atlantic species various combinations, despite their distinct environmental and/or stratigraphical differences,...
Permafrost exerts an important control over hydrological processes in Arctic landscapes and lakes. Recent warming summer precipitation has the potential to alter water availability quality this environment through thermal perturbation of near surface permafrost increased mobility previously frozen solutes freshwaters. We present a unique thirteen-year record (2003-16) physiochemical properties two High lakes show that concentration major ions, especially SO42-, rapidly up 500% since 2008....
The dynamics of the British-Irish Ice Sheet (BIIS) during Last Glacial were conditioned by marine-based ice streams, largest which far was Irish Sea Stream (ISIS) drained southwest across Celtic shelf. maximum extent and timing ISIS have been constrained onshore evidence from UK Ireland, glacigenic sediments encountered in a small suite vibrocores UK-Irish continental shelf, single radiocarbon date is available. These data long supported advance to at least mid-shelf, while recent results...
The calibration of marine 14C dates requires the incorporation regionally specific reservoir offsets known as ΔR, essential for accurate and meaningful inter-archive comparisons. Revised, regional ΔR (‘ΔRR’) values Barents Sea are presented molluscs cetaceans two latest iterations curve, based on previously published pre-bomb live-collected radiocarbon-dated samples (‘ΔRL’; molluscs: n = 16; cetaceans: 18). Molluscan ΔRR, determined four broad oceanographic settings, are: western Svalbard...
Haapaniemi, A.I., Scourse, J.D., Peck, V.L., Kennedy, H., P., Hemming, S.R., Furze, M.F.A., Pieńkowski, A.J., Austin, W.E.N., Walden, J., Wadsworth, E. & Hall, I.R. 2010: Source, timing, frequency and flux of ice‐rafted detritus to the Northeast Atlantic margin, 30–12 ka: testing Heinrich precursor hypothesis. Boreas , Vol. 39, pp. 576–591. 10.1111/j.1502‐3885.2010.00141.x. ISSN 0300‐9483. Increased fluxes (IRD) from European ice sheets have been documented some 1000–1500 years before...
The cyst-theca relationship of Protoperidinium fukuyoi n. sp. (Dinoflagellata, Protoperidiniaceae) is established by incubating resting cysts from estuarine sediments off southern Vancouver Island, British Columbia, Canada, and San Pedro Harbor, California, USA. have a brown-coloured wall, are characterized saphopylic archeopyle comprising three apical plates, the pore plate canal plate; acuminate processes typically arranged in linear clusters. We elucidate phylogenetic P. through large...
Abstract Boxcore 99LSSL‐001 (68.095° N, 114.186° W; 211 m water depth) from Coronation Gulf represents the first decadal‐scale marine palynology and late Holocene sediment record for southwestern part of Northwest Passage. The was studied organic‐walled microfossils (dinoflagellate cysts, non‐pollen palynomorphs), pollen, terrestrial spores, characteristics. 210 Pb, 137 Cs, three accelerator mass spectrometry 14 C dates constrain chronology. Three prominent palaeoenvironmental zones were...
We investigate the cyst-theca relationship of Impagidinium caspienense. Through an incubation experiment, we succeeded in examining motile stage. Additional molecular analysis single-cyst PCR (LSU and SSU rDNA) reveal that cyst is related to species Gonyaulax baltica Ellegaard et al. (). The ability this belong two types cyst-based genera (spiniferate impagidinioid) suggests environmental (particularly salinity) not genetic factors explain formation both morphotypes by G. baltica, which...
Abstract New geophysical surveys and sediment cores constrain past dynamics of the Amundsen Gulf ice stream northwest Laurentide Ice Sheet (LIS), Arctic Canada, during last glacial episode. An ice-rafted debris (IRD) unit its stratigraphic relationship to former grounding lines record withdrawal ∼60,000 km2 marine-based stream. Calibrated (cal.) radiocarbon ages from IRD ice-contact raised marine sediments indicate that retreated ∼250 km over a few centuries or less early Younger Dryas, ca....
Abstract The cryospheric response to climatic warming responsible for recent Arctic sea ice decline can be elucidated using marine geological archives which offer an important long-term perspective. Holocene Thermal Maximum, between 10 and 6 thousand years ago, provides opportunity investigate during a warmer-than-present interval. Here we use organic biomarkers benthic foraminiferal stable isotope data from two sediment cores in the northernmost Barents Sea (>80 °N) reconstruct seasonal...
Core 86027‐144 (74°15.56′ N , 91°14.21′ W ) represents a rare, continuous record of L ate P leistocene to H olocene sediments from igh A rctic C anada extending the end ast G laciation. Based on microfossils (dinocysts, non‐pollen palynomorphs, benthic and planktonic foraminifera), foraminiferal δ 18 O 13 sedimentology, seven palaeoenvironmental zones were identified. Zone I (>10.8 cal. ka BP records deglaciation, ice‐sheet destabilization, float‐off subsequent break‐up. II ( c. 10.8–10.4...
Frozen components on land and in the ocean (sea ice, ice sheets, glaciers permafrost) form cryosphere, which, together with ocean, moderates physical chemical habitat for life Arctic beyond. Changes these components, as a response to rapidly warming climate Arctic, are intensely expressed coastal zone. These areas receive increased terrestrial runoff while subject changing sea-ice environment. Proxies derived from marine sediment archives provide long-term data that extend beyond...
The distal deposition of tephra from explosive volcanism has the potential to geochronologically constrain sedimentary archives and landforms. With this technique, we a Late Glacial glacier re-advance on Svalbard suggest that glacioisostatic emergence rates during Younger Dryas chronozone were at least three times greater than previous estimates. identification cryptotephra (i.e., non-visible) horizons, outside extent visible fallout, greatly expanded field application tephrochronology....
Core 2011804‐0010 from easternmost Lancaster Sound provides important insights into deglacial timing and style at the marine margin of NE Laurentide Ice Sheet ( LIS ). Spanning 13.2–11.0 cal. ka BP investigated for ice‐rafted debris IRD ), foraminifera, biogenic silica total organic carbon, stratigraphy comprises a lithofacies progression proximal grounding line sub‐ice shelf environments to open glaciomarine deposition; sequence similar deposits Antarctic ice shelves. These results are...
Boxcore 99LSSL-001 from the southwest Canadian Arctic Archipelago (68.095°N, 114.186°W), studied by multiproxy approaches (sea-ice diatom biomarker IP 25 , phytoplankton-based brassicasterol, biogenic silica, total organic carbon, dinoflagellate cysts = dinocysts, diatoms) and their applications index P B modern analogue technique (MAT) transfer functions), provides a chronologically constrained ( 210 Pb, 137 Cs, two 14 C dates) palaeoenvironmental archive spanning AD 1625–1999 with which to...
Appropriate marine–terrestrial reservoir offset (ΔR) values are essential for accurate calibration of marine radiocarbon dates. However, ΔR only valid the specific curve that their calculation is based on. Here, we present revised Marine20 from Arctic North America, on previously published 14 C dates pre‐bomb live‐collected molluscs ( n = 124) and cetaceans (beluga whales; tooth dentine; 12), bowhead whale–driftwood age comparisons same glacio‐isostatically uplifted shorelines 18)....
Abstract. Neogloboquadrina pachyderma is the only true polar species of planktonic foraminifera. It therefore plays a crucial role in calcite flux, and reconstructions modelling seasonality environmental change within high latitudes. The rapidly changing environment regions North Atlantic Arctic Oceans poses challenging conditions for this (sub)polar terms temperature, sea-ice melt, saturation, ocean pH contraction ecosystem. To model potential future important latitude species, it vital to...
Abstract Reliable high‐resolution, pre‐observational‐period sea‐ice datasets are rare but critical for contextualizing recent declines and future scenarios. We combine sedimentary ancient DNA of the dinoflagellate Polarella glacialis (Pgla‐sedaDNA) with selected highly branched isoprenoid (HBI) biomarkers alongside other indicators to reconstruct sub‐decadal changes in a marine archive from Antarctic Peninsula that extends ~ 1900 CE. Pre‐1940 CE, continuously present biomarker IPSO 25 yet...
Recent work on the last glaciation of B ritish I sles has led to an improved understanding nature and timing retreat ritish− rish ce Sheet ( BIIS ) from its southern maximum S cilly), northwards into C eltic seas. However, deglacial environments across ea shelf, extent subaerial exposure existence (or otherwise) a contiguous terrestrial linkage between ritain reland following ice remains ambiguous. Multiproxy research, based analysis 12 BGS vibrocores D eep asin CDB ), seeks address these...