Influence of the ITCZ on H2O2 in near surface waters in the equatorial Atlantic Ocean

Details Influence of the ITCZ on H2O2 in near surface waters in the equatorial Atlantic Ocean Influence of the ITCZ on H2O2 in near surface waters in the equatorial Atlantic Ocean

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3123s04c&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 23, CiteID L23S04

Mathematics

Logic

3

Oceanography: Biological And Chemical: Biogeochemical Cycles (1615), Meteorology And Atmospheric Dynamics: Precipitation (1854), Oceanography: Biological And Chemical: Photochemistry, Oceanography: Physical: Air/Sea Interactions (0312), Oceanography: Biological And Chemical: Inorganic Marine Chemistry

Scientific paper

H2O2 was measured in the upper water column (0-200 m) along a west-east transect through the Equatorial Atlantic as part of the German SOLAS (Surface Ocean Lower Atmosphere) cruise Meteor 55 (M55). Vertical profiles of H2O2 showed characteristic exponential decay consistent with light profiles and rainwater inputs. Integrated (0-100 m) water column H2O2 inventories ranged from 1.1-8.9 mmol m-2 with the highest values in the Amazon Plume. H2O2 inventories were also higher at the Equatorial Upwelling and after heavy rain showers in the region of the Inter Tropical Convergence Zone (ITCZ). Analysis of rain water samples collected during the cruise gave a volume weighted mean of 10.8 μmol L-1 (range 1.5-22.3 μmol L-1). This work highlights the importance of rainwater as a major source for H2O2 in the surface waters under the ITCZ.

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