scholarly journals Stable isotope and gas properties of two ice wedges from Cape Mamontov Klyk, Laptev Sea, Northern Siberia

2011 ◽  
Vol 5 (6) ◽  
pp. 3627-3660
Author(s):  
T. Boereboom ◽  
D. Samyn ◽  
H. Meyer ◽  
J.-L. Tison
Keyword(s):  
Stable Isotope ◽  
Climatic Conditions ◽  
Gas Content ◽  
Laptev Sea ◽  
Northern Siberia ◽  
Isotope Data ◽  
Ice Wedge ◽  
The Impact ◽  
Stable Isotope Data ◽  
Gas Properties

Abstract. This paper presents and discusses the texture, fabric and gas properties (contents of total gas, O2, N2, CO2, and CH4) of two ice wedges from Cape Mamontov Klyk, Laptev Sea, Northern Siberia. The two ice wedges display contrasting structures: one being of relatively "clean" ice and the other showing clean ice at its centre as well as debris-rich ice on its sides (referred to as ice-sand wedge). A comparison of gas properties, crystal size, fabrics and stable isotope data (δ18O and δD) allows discriminating between three different facies of ice with specific paleoenvironmental signatures, suggesting different climatic conditions and rates of biological activity. More specifically, total gas content and composition reveal variable intensities of meltwater infiltration and show the impact of biological processes with contrasting contributions from anaerobic and aerobic conditions. Stable isotope data are shown to be valid for discussing changes in paleoenvironmental conditions and/or decipher different sources for the snow feeding into the ice wedges with time. Our data also give support to the previous assumption that the composite ice wedge was formed in Pleistocene and the ice wedge in Holocene times. This study sheds more light on the conditions of ice wedge growth under changing environmental conditions.

scholarly journals Stable isotope and gas properties of two climatically contrasting (Pleistocene and Holocene) ice wedges from Cape Mamontov Klyk, Laptev Sea, northern Siberia

2013 ◽  
Vol 7 (1) ◽  
pp. 31-46 ◽  
Author(s):  
T. Boereboom ◽  
D. Samyn ◽  
H. Meyer ◽  
J.-L. Tison
Keyword(s):  
Stable Isotope ◽  
Environmental Conditions ◽  
Gas Content ◽  
Laptev Sea ◽  
Data Set ◽  
Northern Siberia ◽  
Mixing Ratios ◽  
Ice Wedge ◽  
Previous Assumption ◽  
Gas Properties

Abstract. This paper presents and discusses the texture, fabric, water stable isotopes (δ18O, δD) and gas properties (total gas content, O2, N2, Ar, CO2, and CH4 mixing ratios) of two climatically contrasted (Holocene vs. Pleistocene) ice wedges (IW-26 and IW-28) from Cape Mamontov Klyk, Laptev Sea, in northern Siberia. The two ice wedges display contrasting structures: one being of relatively "clean" ice and the other showing clean ice at its centre as well as debris-rich ice on both sides (referred to as "ice-sand wedge"). Our multiparametric approach allows discrimination between three different ice facies with specific signatures, suggesting different climatic and environmental conditions of formation and various intensities and nature of biological activity. More specifically, crystallography, total gas content and gas composition reveal variable levels of meltwater infiltration and contrasting contributions from anaerobic and aerobic conditions to the biological signatures. Stable isotope data are drawn on to discuss changes in paleoenvironmental conditions and in the temporal variation of the different moisture sources for the snow feeding into the ice wedges infillings. Our data set also supports the previous assumption that the ice wedge IW-28 was formed in Pleistocene and the ice wedge IW-26 in Holocene times. This study sheds more light on the conditions of ice wedge growth under changing environmental conditions.

scholarly journals Dating Human Remains from the Historical Period in Belgium: Diet Changes and the Impact of Marine and Freshwater Reservoir Effects

Radiocarbon ◽  
2014 ◽  
Vol 56 (2) ◽  
pp. 779-788 ◽  
Author(s):  
Anton Ervynck ◽  
Mathieu Boudin ◽  
Tess van den Brande ◽  
Mark van Strydonck
Keyword(s):  
Stable Isotope ◽  
Historical Period ◽  
Human Diet ◽  
Data Set ◽  
Isotope Data ◽  
Human Bones ◽  
Freshwater Reservoir ◽  
The Impact ◽  
Freshwater Environments ◽  
Stable Isotope Data

An overview will be presented of stable isotope data (δ13C and δ15N) available from animal and human bones from Roman to post-Medieval Belgian sites. The data will be used to assess trends in the human diet and evaluate the possible impact of reservoir effects originating from the consumption of fish derived from marine or freshwater environments. Historical and archaeozoological data demonstrate drastic changes in fish consumption throughout the last 2 millennia and thus suggest that fluctuations through time of the impact of the reservoir effects can be expected. However, the present stable isotope data set does not support this suggestion.

scholarly journals Dating Human Remains from the Historical Period in Belgium: Diet Changes and the Impact of Marine and Freshwater Reservoir Effects

Radiocarbon ◽  
2014 ◽  
Vol 56 (02) ◽  
pp. 779-788 ◽  
Author(s):  
Anton Ervynck ◽  
Mathieu Boudin ◽  
Tess van den Brande ◽  
Mark van Strydonck
Keyword(s):  
Stable Isotope ◽  
Historical Period ◽  
Human Diet ◽  
Data Set ◽  
Isotope Data ◽  
Human Bones ◽  
Freshwater Reservoir ◽  
The Impact ◽  
Freshwater Environments ◽  
Stable Isotope Data

An overview will be presented of stable isotope data (δ13C and δ15N) available from animal and human bones from Roman to post-Medieval Belgian sites. The data will be used to assess trends in the human diet and evaluate the possible impact of reservoir effects originating from the consumption of fish derived from marine or freshwater environments. Historical and archaeozoological data demonstrate drastic changes in fish consumption throughout the last 2 millennia and thus suggest that fluctuations through time of the impact of the reservoir effects can be expected. However, the present stable isotope data set does not support this suggestion.

scholarly journals Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Christopher J. Pollock ◽  
Pablo Capilla-Lasheras ◽  
Rona A. R. McGill ◽  
Barbara Helm ◽  
Davide M. Dominoni
Keyword(s):  
Stable Isotope ◽  
Breeding Success ◽  
Cyanistes Caeruleus ◽  
Isotope Data ◽  
Blue Tits ◽  
Stable Isotope Data

Contribution of recycled moisture to precipitation in the monsoon marginal zone: Estimate based on stable isotope data

2019 ◽  
Vol 569 ◽  
pp. 423-435 ◽  
Author(s):  
Guofeng Zhu ◽  
Huiwen Guo ◽  
Dahe Qin ◽  
Hanxiong Pan ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Marginal Zone ◽  
Isotope Data ◽  
Stable Isotope Data

scholarly journals Increasing the Research Value of Digitized Fossil Museum Specimens via Integrated Stable Isotope Data

2018 ◽  
Vol 2 ◽  
Author(s):  
Sean Moran ◽  
Bruce MacFadden ◽  
Michelle Barboza
Keyword(s):  
Stable Isotope ◽  
Data Sets ◽  
Museum Specimens ◽  
Ancillary Data ◽  
Deep Time ◽  
Aggregated Data ◽  
Isotope Data ◽  
The Status ◽  
The Individual ◽  
Stable Isotope Data

Over the past several decades, thousands of stable isotope analyses (δ13C, δ18O) published in the peer-reviewed literature have advanced understanding of ecology and evolution of fossil mammals in Deep Time. These analyses typically have come from sampling vouchered museum specimens. However, the individual stable isotope data are typically disconnected from the vouchered specimens, and there likewise is no central repository for this information. This paper describes the status, potential, and value of the integration of stable isotope data in museum fossil collections. A pilot study in the Vertebrate Paleontology collection at the Florida Museum of Natural History has repatriated within Specify more than 1,000 legacy stable isotope data (mined from the literature) with the vouchered specimens by using ancillary non Darwin Core (DwC) data fields. As this database grows, we hope to both: validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. validate previous studies that were done using smaller data sets; and ask new questions of the data that can only be addressed with larger, aggregated data sets. Additionally, we envision that as the community gains a better understanding of the importance of these kinds of ancillary data to add value to vouchered museum specimens, then workflows, data fields, and protocols can be standardized.

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