A5022019288- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Polar Research and Ecology
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Archaeology and ancient environmental studies
- Climate variability and models
- Winter Sports Injuries and Performance
- Hydrology and Watershed Management Studies
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2017-2025
Hochschule Bremerhaven
2018-2022
Abstract. Stable isotope ratios δ18O and δD in polar ice provide a wealth of information about past climate evolution. Snow-pit studies allow us to relate observed weather conditions the measured variations snow. They therefore offer possibility test our understanding how signals are formed stored firn ice. As snowfall strongly correlated air temperature, isotopes near-surface snow thought record seasonal cycle at given site. Accordingly, number cycles over depth should depend on...
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,...
The Arctic Ocean is an exceptional environment where hydrosphere, cryosphere, and atmosphere are closely interconnected. Changes in sea-ice extent thickness affect ocean currents, as well moisture heat exchange with the atmosphere. Energy water fluxes impact formation melting of sea ice snow cover. Here, we present a comprehensive statistical analysis stable isotopes various hydrological components central obtained during Multidisciplinary drifting Observatory for Study Climate (MOSAiC)...
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. In order to derive climatic information from stable water isotopes of the very recent past, signal-to-noise ratio in climate reconstructions ice cores has be improved. To this end, understanding formation and preservation signal at surface is required, which turn requires a substantial number snow profiles. However, due its high porosity poor stability surface, been rarely measured; i.e., records firn often start several meter depths, few discrete samplings required large effort....
The near-surface stratigraphy of ice sheets provides a unique archive past specific surface mass balance (SMB), usually on the order years to millennia. In context ongoing climate change, warming atmosphere is expected increase SMB over East Antarctic plateau due enhanced snowfall. However, scarcity observational data across this vast region complicates quantification recent changes, contributing uncertainties in future sea level projections.In study, we reconstruct last millennium along...
Abstract Past temperature reconstructions from polar ice sheets are commonly based on stable water isotope records in ice‐cores. However, despite major efforts the understanding of ice‐core signal formation, last millennium Antarctica remain uncertain. Here, using a 100 km scale representative surface dataset, we show that spatial variability local topography and accumulation rate anomalies influences isotopic composition upper‐meter snowpack. The magnitude this non‐temperature effect...
Abstract. The EPICA Dome C (EDC) ice core provides the longest continuous climatic record, covering last 800 000 years (800 kyr). A unique opportunity to investigate decadal millennial variability during past glacial and interglacial periods is provided by high-resolution water isotopic record (δ18O δD) available for EDC core. We present here a compilation of at sample resolution 11 cm, which consists 27 δ18O measurements 7920 δD (covering, respectively, 94 % whole record), including...
Abstract. Stable water isotopes in polar ice provide a wealth of information about past climate evolution. Snow pit studies allow us to relate observed weather and conditions the measured isotope variations snow. They therefore offer possibility test our understanding how signals are formed stored firn ice. As stable snowfall strongly correlated air temperature, near surface snow supposed depict seasonal cycle at given site. Accordingly, variation between sites accumulation rate is expected...
Research over the last five years dedicated to identifying and quantifying processes responsible for driving climate signal in isotopic composition of snow have documented role humidity exchange between atmosphere changing initial precipitation composition. Laboratory field experiments combined with direct vapor isotope flux measurements shown that not only does depositional changes surface composition, but sublimation from induces fractionation leading Thus, it was EastGRIP ice core...
Abstract. The EPICA Dome C (EDC) ice core provides the longest continuous climatic record covering last 800 000 years (800 kyrs). Obtaining homogeneous high resolution measurements and accounting for diffusion provide a unique opportunity to study evolution of decadal millennial variability within past glacial interglacial periods. We present here compilation (11 cm) water isotopic records with 27 δ18O 7 920 δD (covering respectively 94 % whole EDC record), including published new (2 900...
<p>In Austral summer 2017/18 daily surface snow samples were taken (weather allowing) at two depths, 0-1cm and 6-7cm, Neumayer III Station, Dronning Maud Land DML, Antarctica. Stable isotope ratios (18O, D, d-excess) of the analysed in AWI lab. In parallel, water vapor stable isotopes measured continuously on a routine base with Picarro cavity ring-down spectroscope analyser (CRDS). is also full meteorological observatory measuring all important variables including upper-air...
<p>Climate variability of the Arctic region has been investigated by means temperature reconstructions based on proxies from various climate archives around Arctic, compiled over last 2000a in so called Arctic2k record. However, representativeness reconstruction for central Greenland remains unclear, since only a few ice cores have included reconstruction, and observations Ice Sheet (GIC) report ambiguous warming trends end 20th beginning 21st century which are not displayed...
<p>To recover very old climate information from ice core records, one needs to interpret the deepest part of an core. As oldest record, Dome-C can serve as analogue for Beyond EPICA Oldest Ice Core that is currently being drilled.<br><br>Pol et al., EPSL 2010 analyzed high resolution water isotope data and found evidence a limited preservation variability in deep section due mixing diffusion. For instance, Marine Isotope Stage 19, study estimated...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Topographic effect creates non-climatic variations in ice-core based temperature records of last...