A5056624587- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Isotope Analysis in Ecology
- Polar Research and Ecology
- Winter Sports Injuries and Performance
- Icing and De-icing Technologies
- Climate variability and models
- Aeolian processes and effects
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geologic Mapping
- Tree-ring climate responses
- Aerospace Engineering and Energy Systems
- Atmospheric aerosols and clouds
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Environmental and Cultural Studies in Latin America and Beyond
- Advanced Electrical Measurement Techniques
- Peatlands and Wetlands Ecology
- Delphi Technique in Research
- Fluorine in Organic Chemistry
- Pleistocene-Era Hominins and Archaeology
British Antarctic Survey
2022-2024
St Petersburg University
2016-2024
Natural Environment Research Council
2022
Institute of Geography
2020-2021
Institute of Geography
2020
University of Copenhagen
2017-2019
Arctic and Antarctic Research Institute
2016-2019
Abstract Reproducible climate reconstructions of the Common Era (1 CE to present) are key placing industrial-era warming into context natural climatic variability. Here we present a community-sourced database temperature-sensitive proxy records from PAGES2k initiative. The gathers 692 648 locations, including all continental regions and major ocean basins. trees, ice, sediment, corals, speleothems, documentary evidence, other archives. They range in length 50 2000 years, with median 547...
Abstract Accurate estimates of the past extent Greenland ice sheet provide critical constraints for models used to determine Greenland’s response climate forcing and contribution global sea level. Here we use a continuous core dust record from Renland cap on east coast constrain timing changes margin relative level over last glacial cycle. During Holocene previous interglacial period (Eemian) was dominated by coarse particles consistent with rock samples central East Greenland. From particle...
Several recent studies from both Greenland and Antarctica have reported significant changes in the water isotopic composition of near-surface snow between precipitation events. These been linked to exchange with atmospheric vapor sublimation-induced fractionation, but processes are poorly constrained by observations. Understanding quantifying these crucial interpretation ice core climate proxies formulation isotope-enabled general circulation models. Here, we present continuous measurements...
The Sentinel Application Platform (SNAP) architecture facilitates Earth Observation data processing. In this work, we present results from a new Snow Processor for SNAP. We also describe physical principles behind the developed snow property retrieval technique based on analysis of Ocean and Land Colour Instrument (OLCI) onboard Sentinel-3A/B measurements over clean polluted fields. Using OLCI spectral reflectance in range 400–1020 nm, derived important properties such as broadband albedo,...
In this study, we present the age scales for three Antarctic Peninsula (AP) ice cores: Palmer, Rendezvous, and Jurassic. The cores are all intermediate-depth cores, in 133–141 m depth range. Non-sea-salt sulfate ([nssSO42−]) hydrogen peroxide (H2O2) display marked seasonal variability suitable annual-layer counting. Palmer core covers 390 years, 1621–2011 C.E., is one of oldest AP cores. Rendezvous Jurassic lower elevation high-snow accumulation sites therefore cover shorter intervals,...
Abstract. Changes in sea ice conditions and atmospheric circulation over the Southern Ocean play an important role modulating Antarctic climate. However, observations of both wind are limited Antarctica Ocean, temporally spatially, prior to satellite era (1970 onwards). Ice core chemistry data can be used reconstruct changes annual, decadal, millennial timescales. To facilitate reconstructions, CLIVASH2k (CLimate Variability Hemisphere past 2000 years) working group has compiled a database...
Abstract. We use isotopic composition (δD) data from six sites in Princess Elizabeth Land (PEL) order to reconstruct air temperature variability this sector of East Antarctica over the last 350 years. First, we present-day instrumental mean annual surface demonstrate that studied region (between Russia's Progress, Vostok and Mirny research stations) is characterized by uniform variability. thus construct a stacked record anomaly for whole period 1958–2015. A comparison series with Southern...
The Sentinel Application Platform (SNAP) architecture facilitates Earth Observation data processing (http://step.esa.int/main/toolboxes/snap/). In this work we present results from a new Snow Processor for SNAP. We also describe physical principles behind the developed snow property retrieval technique based on analysis of Ocean and Land Colour Instrument (OLCI) onboard Sentinel-3A/B measurements over clean polluted fields. Using OLCI spectral reflectance in range 400-1020nm, derive...
Abstract. A new ice core was drilled in West Antarctica on Skytrain Ice Rise field season 2018/2019. This 651 m is one of the main targets WACSWAIN (WArm Climate Stability Antarctic sheet last INterglacial) project. present-day accumulation rate 13.5 cm w.e. yr−1 derived. Although project mainly aims to investigate interglacial (115–130 ka), a robust chronology period covering recent past needed constrain age models for deepest ice. Additionally, this time important understanding current...
The remote Antarctic continent, distant from human industrial activity, should be one of the last places on Earth to capture Anthropogenic change. Hence, stratigraphic evidence pollution and nuclear activity in provides proof global nature Anthropocene epoch. We propose an Peninsula ice core candidate for Global boundary Stratotype Section Point (GSSP) onset Anthropocene. Palmer captures first spheroidal carbonaceous fly ash particles (SCPs), resulting high temperature combustion deposited...
Abstract Sea‐ice extent is predicted to decrease in a warming climate. However, despite global over the past century, total Antarctic sea ice remained relatively stable from 1979 until 2015, before strongly melting. Here we explore long‐term variability by reconstructing since 1700 CE, based on paleoclimate records and data assimilation. Our results indicate decline southern hemisphere sea‐ice 20th driven reduction of 0.26 million km 2 Weddell Sea that reached values at end century lower...
Biomass burning plays an important role in climate-forcing and atmospheric chemistry. The drivers of fire activity over the past two centuries, however, are hotly debated fueled by poor constraints on magnitude trends preindustrial regimes. As a powerful tracer biomass burning, reconstructions paleoatmospheric carbon monoxide (CO) can provide valuable information evolution across to industrial transition. Here too, significant disagreements between existing CO records currently allow for...
We estimated the stable isotopic composition of water from subglacial Lake Vostok using two different sets samples: (1) frozen on drill bit immediately after first lake unsealing and (2) in borehole re-drilled one year later. The most reliable values are: -59.0 ± 0.3 ‰ for oxygen-18, -455 1 deuterium 17 d-excess. This result is also confirmed by modelling transformations which froze borehole, a laboratory experiment simulating this process. A comparison newly obtained with that ice (-56.2...
Abstract. Changes in sea ice conditions and atmospheric circulation over the Southern Ocean play an important role modulating Antarctic climate. However, observations of both wind are limited Antarctica Ocean, temporally spatially. Ice core chemistry data can be used to reconstruct changes annual, decadal, millennial timescales. To facilitate reconstructions, CLIVASH2k working group has compiled a database two species, sodium [Na+] sulphate [SO42-], commonly measured ionic species. The...
During the field campaign in August 18–30, 2020 meteorological regime and heat balance of glacier surface were investigated crater Mt Elbrus Eastern Summit (5600 m a.s.l.) together with GPR measurements ice thickness seasonal snow cover. Preliminary data analysis allowed following features: predominance synoptic fluctuations over diurnal ones; high values average maximum wind speed associated impact jet streams influence leeward storms; extremely temporal variability relative humidity its...
Work on the project focused following five areas: 1) field works in Antarctica at Vostok and Concordia stations; 2) experimental theoretical studies of ice core paleoclimate research; 3) related to exploration subglacial Lake Vostok; 4) development technology drilling equipment for deep coring lakes; 5) upgrading analytical instrumentation Climate Environmental Research Laboratory (CERL) Arctic Antarctic Institute. The main achievements research include further elaboration a new method...
Abstract. We use isotopic composition (δD) data from 6 sites in Princess Elisabeth Land (PEL) order to reconstruct the air temperature variability this sector of East Antarctica for last 350 years. First, we present-day instrumental mean annual surface demonstrate that studied region (between Russian research stations Progress, Vostok and Mirny) is characterized by uniform variability. thus construct stacked record anomaly whole period 1958–2015. A comparison series with Southern Hemisphere...
The results of detailed isotopic studies ice core samples from the Vostok station (East Antarctica) related to MIS-11 era (the 11th sea isotope stage, i.e. 370–440 thousand years ago) are presented. Reconstruction paleoclimatic conditions in this period time was performed using method interpretation ice, developed by authors article, which is based on joint analysis three independent parameters: δD, d-excess, 17 O-excess. composition (δD) and deuterium excess depend following meteorological...
The knowledge of the spatial distribution snow accumulation rate and isotopic composition in different scales, from local to continental, over Antarctic Ice Sheet is critically important for interpretation paleoclimate data obtained deep ice cores, correct assessment sheet mass balance, etc. With this mind, we have synthesized geodetic, glaciological geochemical collected vicinity central Vostok station 1970–2017 order shed light on processes governing scale 100 1000 m. First, discovered...
Jacobsite is a characteristic minor mineral of manganese ores at the Ushkatyn-III deposit in Central Kazakhstan. It mainly associates with hausmannite, tephroite, sonolite, friedelite, pennantite and calcite bulk mass ores. A similar association, but without also jacobsite from veinlets intersecting ore. The chemical composition varies Mn1.5Fe1.5O4 to MnFe2O4. high content (1 atoms per formula unit (apfu)) dominates ores, while veins are dominated by stoichiometric (Mn ~1 apfu). was formed...
<p>In 2016–2018, during Russian Arctic Expedition on Svalbard (RAE-S) we have collected the samples of atmospheric precipitation, terrestrial waters, snow and ice West Spitsbergen island in vicinity Grønfjorden. The measurements stable water isotope content (δ<sup>18</sup>O δD) precipitation Barentsburg has allowed to draw Local Meteoric Water Line analyze relationship between isotopic air...
In this study, we used the stable water isotope record (δ18O) from an ice core drilled in Palmer Land, southern Antarctic Peninsula (AP). Utilizing δ18O identified two climate regimes during satellite era. During 1979–1998 positive interdecadal Pacific oscillation (IPO) phase, a low-pressure system north of Weddell Sea drove southeasterly winds that are associated with increase warm air mass intrusion onto Larsen shelves, which melted and decreased sea concentration Sea/increase...
The present-day global climate changes, very likely caused by anthropogenic activity, may potentially present a serious threat to the whole human civilization in near future. In order develop plan of measures aimed at elimination these threats and adaptation undesirable one should deeply understand mechanism past (and thus, future) climatic changes our planet. this study we compare data instrumental observations air temperature snow accumulation rate performed Central Antarctica (the Vostok...