Wuttig, Kathrin; Heller, Maija I; Croot, Peter L (2013): Superoxide decay rates during METEOR cruise M83/1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.823500, Supplement to: Wuttig, K et al. (2013): Pathways of Superoxide (O2-)Decay in the Eastern Tropical North Atlantic|. Environmental Science & Technology, 47, 10249-10256, https://doi.org/10.1021/es401658t
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Abstract:
Superoxide is an important transient reactive oxygen species (ROS) in the ocean formed as an intermediate in the redox transformation of oxygen (O2) into hydrogen peroxide (H2O2) and vice versa. This highly reactive and very short-lived radical anion can be produced both via photochemical and biological processes in the ocean. In this paper we examine the decomposition rate of O2- throughout the water column, using new data collected in the Eastern Tropical North Atlantic (ETNA) Ocean. For this approach we applied a semi factorial experimental design, to identify and quantify the pathways of the major identified sinks in the ocean. In this work we occupied 6 stations, 2 on the West African continental shelf and 4 open ocean stations, including the CVOO time series site adjacent to Cape Verde. Our results indicate that in the surface ocean, impacted by Saharan aerosols and sediment resuspension, the main decay pathways for superoxide is via reactions with Mn(||) and organic matter.
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 27542298: Climate - Biogeochemistry Interactions in the Tropical Ocean
Coverage:
Median Latitude: 15.933554 * Median Longitude: -22.040914 * South-bound Latitude: 12.501000 * West-bound Longitude: -24.251667 * North-bound Latitude: 17.650500 * East-bound Longitude: -17.622167
Date/Time Start: 2010-10-17T23:15:00 * Date/Time End: 2010-10-22T07:47:00
Minimum DEPTH, water: 19 m * Maximum DEPTH, water: 600 m
Event(s):
M83/1_769 (GO-FLO 1) * Latitude: 17.650160 * Longitude: -24.250160 * Date/Time: 2010-10-17T23:15:00 * Elevation: -3593.7 m * Campaign: M83/1 * Basis: Meteor (1986) * Method/Device: Go-Flo bottles (GOFLO) * Comment: Nutrients; Trace Metals (10;20;40)
M83/1_771 (GO-FLO 2) * Latitude: 17.650500 * Longitude: -24.249500 * Date/Time: 2010-10-18T01:33:00 * Elevation: -3593.1 m * Campaign: M83/1 * Basis: Meteor (1986) * Method/Device: Go-Flo bottles (GOFLO) * Comment: Nutrients; Trace Metals (10; 150; 170)
M83/1_775 (GO-FLO 3) * Latitude: 17.649667 * Longitude: -24.249333 * Date/Time: 2010-10-18T08:47:00 * Elevation: -3593.8 m * Campaign: M83/1 * Basis: Meteor (1986) * Method/Device: Go-Flo bottles (GOFLO) * Comment: Nutrients; Trace Metals (10)
Comment:
log value=6.00 means smaller than 6
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, water | Depth water | m | Geocode | ||
| 3 | Copper, log-decay rate | log k Cu | Wuttig, Kathrin | |||
| 4 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 5 | Copper, intercept of decay rate | k int Cu | 1/s | Wuttig, Kathrin | ||
| 6 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 7 | Iron, log-decay rate | log k Fe | Wuttig, Kathrin | |||
| 8 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 9 | Iron, intercept of decay rate | k int Fe | 1/s | Wuttig, Kathrin | ||
| 10 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 11 | Manganese, log-decay rate | log k Mn | Wuttig, Kathrin | |||
| 12 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 13 | Manganese, intercept of decay rate | k int Mn | 1/s | Wuttig, Kathrin | ||
| 14 | Standard deviation | Std dev | ± | Wuttig, Kathrin | ||
| 15 | Sea-water, decay rate | k SW | 1/s | Wuttig, Kathrin | ||
| 16 | Diethylenetriaminepentaacetic acid, decay rate | k DTPA | 1/s | Wuttig, Kathrin |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
500 data points