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H 2 O 2 in the marine troposphere and seawater of the Atlantic Ocean (48°N – 63°S)
Author(s) -
Weller Rolf,
Schrems Otto
Publication year - 1993
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 - 10.1029/93gl00065
Subject(s) - seawater , troposphere , oceanography , mixing ratio , atmosphere (unit) , geology , atmospheric sciences , environmental science , meteorology , geography
Concentrations of H 2 O 2 in gas phase and seawater have been measured in pristine regions of the Atlantic Ocean during the RV Polarstern expedition ANT X‐1 from 11/15/91 to 01/02/92. A broad maximum of gaseous H 2 O 2 mixing ratio in the troposphere was found between the tropic of cancer and the tropic of capricornus with peak values around 1.8 ppbv. The observed ratio of organic peroxides/total amount of peroxides was 0.2–0.35, in contrast to the remarkably lower ratio of 0.05–0.10 measured in the continental troposphere by other groups. In the Atlantic surface seawater the H 2 O 2 concentrations were determined to be around 0.1 μmol/L, decreasing with increasing water depth to a value below the detection limit at approximately 100 m. We observed low H 2 O 2 concentrations (≈ 0.03 μmol/L) in surface water in coastal shelf regions and in the partly ice covered Weddell Sea.