The cryosphere, 2022-07, Vol.16 (7), p.2947-2966
2022
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Details
- Autor(en) / Beteiligte
- Titel
- Gas isotope thermometry in the South Pole and Dome Fuji ice cores provides evidence for seasonal rectification of ice core gas records
- Ist Teil von
- The cryosphere, 2022-07, Vol.16 (7), p.2947-2966
- Ort / Verlag
- Katlenburg-Lindau: Copernicus GmbH
- Erscheinungsjahr
- 2022
- Quelle
- EZB Free E-Journals
- Beschreibungen/Notizen
- Gas isotope thermometry using the isotopes of molecular nitrogen and argon has been used extensively to reconstruct past surface temperature change from Greenland ice cores. The gas isotope ratios [delta].sup.15 N and [delta].sup.40 Ar in the ice core are each set by the amount of gravitational and thermal fractionation in the firn. The gravitational component of fractionation is proportional to the firn thickness, and the thermal component is proportional to the temperature difference between the top and bottom of the firn column, which can be related to surface temperature change. Compared to Greenland, Antarctic climate change is typically more gradual and smaller in magnitude, which results in smaller thermal fractionation signals that are harder to detect. This has hampered application of gas isotope thermometry to Antarctic ice cores.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1994-0424, 1994-0416eISSN: 1994-0424, 1994-0416DOI: 10.5194/tc-16-2947-2022Titel-ID: cdi_doaj_primary_oai_doaj_org_article_bdaef5e5e2634fdc97006d6eac08b603
- Format
- –
- Schlagworte
- Analytical methods, Antarctic climate, Antarctic climate changes, Antarctic ice, Approximation, Argon, Atomic properties, Bias, Calibration, Climate change, Climatic changes, Comparative analysis, Cores, Domes, Firn, Flowlines, Fractionation, Gases, Geothermal power, Gravity, Heat, Holocene, Ice, Ice cores, Isotope ratios, Isotopes, Measurement methods, Nitrogen, Physics, Polar environments, Records, Snow accumulation, South Pole, Surface temperature, Temperature changes, Temperature differences, Temperature effects, Temperature gradients, Temperature measurements, Thermometry, Thickness, Topographic effects, Topography, Upstream, Variability