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Problems Related to Interplanetary Matter (1961) / Chapter Skim
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OXYGEN ISOTOPE MEASUREMENTS IN GLACIAL ICE
Pages 102-107

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From page 102...
... Hundreds of measurements were performed, and the 8 values quoted represent extremes for that location; experimental errors were just a few tenths of a mil. The large South Pole negative 6 values are probably a result not only of a steep thermal gradient between equator and pole but also reflects the lack of reevaporation from the cool oceanic waters over which the southward-bound air masses pass.
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From page 103...
... Oxygen isotope measurements have been made at the hundred meter, the three hundred meter, and the four hundred and ten meter level, and these clearly show summer-winter variations akin to those seen in Figure 1. With increasing consolidation some fine structure is lost which relates to individual storms, but the summer and winter distinction remains clear even at the deepest levels measured so far.
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From page 104...
... The origin of the carbon dioxide is certainly not very well understood, and the ratios of carbon dioxide to nitrogen in the ice vary enormously. I would feel much happier employing carbon from organic specimens -- say from pollen in the ice.
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From page 105...
... Epstein: It would be interesting to see whether wet periods can be detected through these isotopic measurements. Tree rings provide a record of the wet seasons existing in lower latitudes at least.
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From page 107...
... Receiving funds from both public and private sources, by contributions, grant, or contract, the Academy and its Research Council thus work to stimulate research and its applications, to survey the broad possibilities of science, to promote effective utilization of the scientific and technical resources of the country, to serve the Government, and to further the general interests of science. The C0MMITTEE ON NUCLEAR SCIENCE was established in 1947 on the recommendation of a representative group of nuclear scientists that included physicists, geophysicists, chemists and biologists.
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Key Terms

  • hundred meter
  • air masses
  • thermal gradient
  • fine structure
  • south pole

  • isotope measurements
  • greenland glacier
  • oxygen isotope
  • water vapor
  • receiving funds

  • ice age
  • mils depleted
  • mass moves
  • structure representing
  • easily seen

  • ten meter
  • clues regarding
  • isotope fractionation
  • meter sample
  • lower latitudes

  • thousand scientists
  • glaciological techniques
  • variations akin
  • fractionation depends
  • nuclear constants

  • snow obtained
  • measurements performed
  • isotopic fractionation
  • typical glacial
  • include penetration


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