Premium
7 Be and 210 Pb Indicate an upper troposphere source for elevated ozone in the summertime subtropical free troposphere of the eastern North Atlantic
Author(s) -
Graustein William C.,
Turekian Karl K.
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 - 10.1029/96gl00304
Subject(s) - troposphere , stratosphere , ozone , atmospheric sciences , altitude (triangle) , environmental science , climatology , tropospheric ozone , aerosol , atmospheric chemistry , meteorology , physics , geology , geometry , mathematics
The relative abundance of 7 Be and 210 Pb in aerosols, represented as the “normalized fraction”, 7 Be/( 7 Be + n 210 Pb), is unaffected by aerosol scavenging. This normalized fraction is an index of the relative influence on an air parcel of stratospheric and upper tropospheric processes versus those in the continental boundary layer (CBL). The high correlation of ozone concentration with the normalized fraction observed during the summer at Izaña, Canary Islands, indicates that 1) low altitude transport of air from the CBL is associated with low ozone concentrations; 2) high altitude transport through the troposphere from the CBL is associated with net ozone production; and 3) the stratosphere is not a direct source of a significant fraction of the ozone observed at Izaña during the summer.