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

Croot, Peter, Streu, Peter, Peeken, Ilka, Lochte, Karin and Baker, Alex R. (2004) Influence of the ITCZ on H2O2 in near surface waters in the equatorial Atlantic Ocean. Open Access Geophysical Research Letters, 31 (23). L23S04. DOI 10.1029/2004GL020154.

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Abstract

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.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2004GL020154
ISSN: 0094-8276
Expeditions/Models/Experiments:
Date Deposited: 17 Mar 2010 13:36
Last Modified: 21 Mar 2018 13:00
URI: http://oceanrep.geomar.de/id/eprint/5384

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