Ice Core Data
Ice Core Data - Related Videos
02:10
The Nucleosome Core Particle
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2020
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins. The paradox Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
09:11
Implantation of Radiotelemetry Transmitters Yielding Data on ECG, Heart Rate, Core Body Temperature and Activity in Free-moving Laboratory Mice
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Cited by 56 •
2011
A surgical technique for implantation of commercially available telemetry transmitters used for continuous measurement of biopotential (one-lead ECG), heart rate, core body temperature and locomotor activity in freely moving mice is shown. Recommendations and protocols for post-operative care and pain relief, improving recovery, well being and survival rate are also presented.
02:23
Visualizing the Effect of pH on Solubilization of the Influenza A Viral Core
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2026
Source: Stauffer, S. et al., In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation. J. Vis. Exp. (2016)This video demonstrates the effect of pH on the solubilization of influenza A viral cores. Gel electrophoresis and protein staining reveal the progressive disassembly of the core structure under acidic conditions.
03:10
Soil Core Sample Collection for Water Retention Property Analysis
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2026
Source:Alessia J. Marchesan1, Guillermo Hernandez Ramirez11Renewable Resources, University of Alberta. This video demonstrates the technique for collecting a soil sample for hydraulic property analysis. The sampling area is cleared, and the top crust is evacuated. The sampling ring is then placed into the soil to collect the sample. The ring with the sample is then cleaned, labeled, packed, and transferred undisturbed for analysis.
09:21
Sediment Core Sectioning and Extraction of Pore Waters under Anoxic Conditions
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Cited by 5 •
2016
A protocol for sectioning sediment cores and extracting pore waters under anoxic conditions in order to permit analysis of redox sensitive species in both solids and fluids is presented.
FAQs
Ice core data combine several complementary signals rather than relying on one measurement. Trapped atmospheric gases inform reconstructions of atmospheric composition, while stable isotopes provide evidence about temperature. Dust and other particulates add clues about environmental disturbance. Considering these markers together strengthens interpretation of the conditions that organisms experienced across different periods.
Each layer forms as snow accumulates, preserving signals from a particular stage in the record. This layered arrangement lets scientists examine environmental change over time instead of treating all measurements as a single average. In biological studies, that time-resolved context helps relate shifts in temperature or atmospheric composition to ecosystem, species, or microbial responses.
Trapped gases provide a preserved record of past atmospheric composition, including changes associated with greenhouse gas emissions. Comparing those signals with temperature and other markers helps establish environmental context for biological change. The resulting record can support analysis of how changing atmospheric conditions corresponded with altered species distributions, ecosystems, or microbial communities.
Scientists interpret different marker types according to the environmental variable they represent. Stable isotopes are used as evidence for temperature, whereas dust and other particulates contribute information about environmental disturbance. Trapped gases address atmospheric composition. Keeping these signals analytically distinct helps avoid treating every chemical or physical measurement as evidence of the same environmental process.
Extraction is followed by analysis of the core’s physical and chemical signals. Scientists examine layered material for trapped atmospheric gases, stable isotopes, dust, and other particulates, then use the resulting evidence to reconstruct temperature, atmospheric composition, and environmental disturbance over time. Those reconstructions can subsequently be compared with biological patterns such as ecosystem or microbial change.
They are especially valuable when researchers need a long-term environmental context for biological patterns. The records can be used to examine how climate variability influenced ecosystems, species distributions, microbial communities, and ecological change. This perspective extends biological analysis beyond present-day observations, allowing current patterns to be considered alongside evidence of earlier environmental conditions.
By documenting earlier variation in temperature and atmospheric composition, ice core data provide a baseline for interpreting present-day biological responses. Researchers can use that historical context when considering greenhouse gas emissions, ongoing climate change, and associated ecological change. The records help place contemporary observations of organisms and ecosystems within a longer environmental history.