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Arévalo-Martínez, Damian L; Bange, Hermann Werner (2019): N2O emissions from the northern Benguela upwelling system. PANGAEA, (dataset in review), Supplement to: Arévalo-Martínez, Damian L; Steinhoff, T; Brandt, Peter; Körtzinger, Arne; Lamont, Tarron; Rehder, Gregor; Bange, Hermann Werner (2019): N2O Emissions From the Northern Benguela Upwelling System. Geophysical Research Letters, 46(6), 3317-3326,

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The Benguela Upwelling System (BUS) is the most productive of all eastern boundary upwelling ecosystems and it hosts a well-developed oxygen minimum zone. As such, the BUS is a potential hotspot for production of N2O, a potent greenhouse gas derived from microbially driven decay of
sinking organic matter. Yet, the extent at which near-surface waters emit N2O to the atmosphere in the BUS is highly uncertain. Here we present the first high-resolution surface measurements of N2O across the northern part of the BUS (nBUS).We found strong gradients with a threefold increase in N2O concentrations near the coast as compared with open ocean waters. Our observations show enhanced sea-to-air fluxes of N2O (up to 1.67 nmol m−2 s−1) in association with local upwelling cells. Based on our data we suggest that the nBUS can account for 13% of the total coastal upwelling source of N2O to the atmosphere
Median Latitude: -18.916005 * Median Longitude: 4.610510 * South-bound Latitude: -28.239200 * West-bound Longitude: -35.903000 * North-bound Latitude: -5.115000 * East-bound Longitude: 15.101000
Date/Time Start: 2013-07-03T12:58:31 * Date/Time End: 2013-09-30T05:36:35
M98-track * Latitude Start: -3.716200 * Longitude Start: -38.533800 * Latitude End: -22.941000 * Longitude End: 14.503000 * Date/Time Start: 2013-07-01T00:00:00 * Date/Time End: 2013-07-28T00:00:00 * Location: Atlantic Ocean * Campaign: M98 (RACE SACUS) * Basis: Meteor (1986) * Method/Device: Underway cruise track measurements (CT) * Comment: Fortaleza - Walvis Bay
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