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- a0358b3e-0926-4b17-8b32-c1b15a73cba5 definition "The isotopic record found in ice cores reveal direct information about the past climate. d18O (delta oxygen-18), 16O and 18O are isotopes of oxygen with slight differences in atomic weight. Depending on the temperature of evaporation and how far the water has had to travel before it fell as snow, the ratio of 18O to 16O will vary. This ratio, known as d18O, can be measured very accurately using a mass spectrometer. Over short time scales the change in temperature from summer to winter produces a very clear oscillation in the 18O/16O ratio. This oscillation is used to determine the age of the core at different depths, simply by counting the oscillations. Over longer time periods, this ratio indicates the average temperature of the regions between the evaporation site and the coring site. Investigators in Greenland and Antarctica are also analyzing for the ratio of 1H/2H (Hydrogen to deuterium) which will allow even finer detail about source temperature and condensation history to be obtained." @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 id "1661884" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_id 08a4f002-f368-414d-b923-83dd498452d8 @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_id 1eb0ea0a-312c-4d74-8d42-6f1ad758f999 @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_id 23703b6b-ee15-4512-b5b2-f441547e2edf @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_id c9a5b3eb-7556-41a8-a2b8-c015db80e5b2 @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_id e9f67a66-e9fc-435c-b720-ae32a2c3d8f5 @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_label "CLIMATE INDICATORS" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_label "EARTH SCIENCE" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_label "ICE CORE RECORDS" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_label "PALEOCLIMATE INDICATORS" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 path_label "Science Keywords" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 prefLabel "ISOTOPES" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 reference "GISP2 Ice core (Greenland) and Climate Change: http://www.gisp2.sr.unh.edu/GISP2/MoreInfo/Ice_Cores_Past.html" @default.
- a0358b3e-0926-4b17-8b32-c1b15a73cba5 tag "Science Keywords" @default.