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Large amplitude solar modulation cycles of 10 Be in Antarctica: Implications for atmospheric mixing processes and interpretation of the ice core record
Author(s) -
Steig E. J.,
Polissar P. J.,
Stuiver M.,
Grootes P. M.,
Finkel R. C.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl00255
Subject(s) - stratosphere , atmospheric sciences , ice core , earth's magnetic field , middle latitudes , solar cycle , latitude , solar maximum , environmental science , amplitude , tropopause , climatology , altitude (triangle) , geology , solar wind , physics , magnetic field , geodesy , geometry , mathematics , quantum mechanics
10 Be concentrations in an ice core at Taylor Dome, Antarctica show greater variation over the last 75 years than similar 10 Be time‐series from Greenland. Like the Greenland records, the new Antarctic data exhibit a strong periodicity which follows expected changes in the production rate of 10 Be over the 11‐year solar cycle. Noting that the amplitude of production‐rate variation is both latitude and altitude dependent, we estimate the relative contribution of 10 Be from different atmospheric reservoirs. The calculations yield a relatively small (<35%) contribution from the low‐to‐mid latitude stratosphere, suggesting a weak coupling between Antarctic 10 Be and geomagnetic field intensity.