Nitrous oxide and methane from water samples during METEOR cruise M120
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| Format: | Dataset Open Access |
| Langue: | en |
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2021
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| _version_ | 1867171309070319616 |
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| author | Sabbaghzadeh, Bita |
| author_facet | Sabbaghzadeh, Bita |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Upward transport and/or mixing of trace gas-enriched subsurface waters fosters the exchange of nitrous oxide (N2O) and methane (CH4) with the atmosphere in the Eastern-South Atlantic (ESA). To date, it is, however, unclear whether this source is maintained by local production or advection of trace-gas enriched water masses. So, the meridional and zonal variability of N2O and CH4 in the ESA were investigated to constrain the contributions of the major regional water masses to the overall budget of N2O and CH4. The fieldwork took place during the cruises M99 (July 31st - August 23rd, 2013) and M120 (October 17th - November 18th, 2015) onboard the R/V METEOR, which encompassed close-coastal and open ocean regions off Angola and Namibia. To investigate the regional concentration gradients of N2O and CH4 and corresponding sea-air fluxes, seven hydrographic sections (six zonal transects and one alongshore transect) were conducted between ~10°S and 26°S. Concentrations of dissolved N2O and CH4 in surface waters were continuously measured by using the Mobile Equilibrator Sensor System. To evaluate, the oceanic-atmospheric trace gas exchange, the atmospheric N2O and CH4 in ambient air were measured at several sporadic locations, with an inlet installed at 35 m height. The data were quality controlled by comparing with the data generated by NOAA in the nearest atmospheric sampling station (23.58° S, 15.03°E, Station NMB (Gobabeb, Namibia)). Also, to better understand the underlying patterns of the trace gas in the ESA, the vertical profiles were investigated by measuring discrete samples of N2O using the dynamic headspace method on M99. N2O and CH4 concentrations were also measured using a purge and trap system during M120 expedition. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_936742 |
| institution | PANGAEA |
| language | en |
| publishDate | 2021 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Nitrous oxide and methane from water samples during METEOR cruise M120 Sabbaghzadeh, Bita CTD/Rosette; CTD 100; CTD 102; CTD 104; CTD 105; CTD 106; CTD 107; CTD 108; CTD 109; CTD 11; CTD 110; CTD 111; CTD 112; CTD 113; CTD 16; CTD 17; CTD 18; CTD 22; CTD 23; CTD 24; CTD 25; CTD 33; CTD 38; CTD 46; CTD 49; CTD 54; CTD 55; CTD 56; CTD 57; CTD 58; CTD 59; CTD 60; CTD 62; CTD 63; CTD 64; CTD 67; CTD 68; CTD 69; CTD 7; CTD 70; CTD 71; CTD 72; CTD 73; CTD 8; CTD 9; CTD 91; CTD 96; CTD 97; CTD 98; CTD-RO; Date/Time of event; DEPTH, water; Eastern Boundary Upwelling Syetms; Enhancing Prediction of Tropical Atlantic Climate and its Impact; Event label; LATITUDE; LONGITUDE; M120; M120_0900-1; M120_0902-1; M120_0903-1; M120_0909-1; M120_0922-1; M120_0924-1; M120_0927-1; M120_0936-1; M120_0938-1; M120_0940-1; M120_0942-1; M120_0958-1; M120_0971-1; M120_0989-1; M120_0995-1; M120_1006-1; M120_1009-1; M120_1012-1; M120_1015-1; M120_1018-1; M120_1021-1; M120_1024-1; M120_1031-1; M120_1033-1; M120_1035-1; M120_1041-1; M120_1043-1; M120_1047-1; M120_1050-1; M120_1052-1; M120_1054-1; M120_1056-1; M120_1096-1; M120_1109-1; M120_1111-1; M120_1113-1; M120_1117-1; M120_1121-1; M120_1125-1; M120_1128-1; M120_1131-1; M120_1133-1; M120_1137-1; M120_1138-1; M120_1140-1; M120_1142-1; M120_1144-1; M120_1146-1; Meteor (1986); Methane; Nitrous oxide; Nitrous oxide, dissolved; PREFACE; SACUS/SACUS-II; Southwest African Coastal Upwelling System and Benguela Niños; Station label; trace gases Upward transport and/or mixing of trace gas-enriched subsurface waters fosters the exchange of nitrous oxide (N2O) and methane (CH4) with the atmosphere in the Eastern-South Atlantic (ESA). To date, it is, however, unclear whether this source is maintained by local production or advection of trace-gas enriched water masses. So, the meridional and zonal variability of N2O and CH4 in the ESA were investigated to constrain the contributions of the major regional water masses to the overall budget of N2O and CH4. The fieldwork took place during the cruises M99 (July 31st - August 23rd, 2013) and M120 (October 17th - November 18th, 2015) onboard the R/V METEOR, which encompassed close-coastal and open ocean regions off Angola and Namibia. To investigate the regional concentration gradients of N2O and CH4 and corresponding sea-air fluxes, seven hydrographic sections (six zonal transects and one alongshore transect) were conducted between ~10°S and 26°S. Concentrations of dissolved N2O and CH4 in surface waters were continuously measured by using the Mobile Equilibrator Sensor System. To evaluate, the oceanic-atmospheric trace gas exchange, the atmospheric N2O and CH4 in ambient air were measured at several sporadic locations, with an inlet installed at 35 m height. The data were quality controlled by comparing with the data generated by NOAA in the nearest atmospheric sampling station (23.58° S, 15.03°E, Station NMB (Gobabeb, Namibia)). Also, to better understand the underlying patterns of the trace gas in the ESA, the vertical profiles were investigated by measuring discrete samples of N2O using the dynamic headspace method on M99. N2O and CH4 concentrations were also measured using a purge and trap system during M120 expedition. |
| title | Nitrous oxide and methane from water samples during METEOR cruise M120 |
| topic | CTD/Rosette; CTD 100; CTD 102; CTD 104; CTD 105; CTD 106; CTD 107; CTD 108; CTD 109; CTD 11; CTD 110; CTD 111; CTD 112; CTD 113; CTD 16; CTD 17; CTD 18; CTD 22; CTD 23; CTD 24; CTD 25; CTD 33; CTD 38; CTD 46; CTD 49; CTD 54; CTD 55; CTD 56; CTD 57; CTD 58; CTD 59; CTD 60; CTD 62; CTD 63; CTD 64; CTD 67; CTD 68; CTD 69; CTD 7; CTD 70; CTD 71; CTD 72; CTD 73; CTD 8; CTD 9; CTD 91; CTD 96; CTD 97; CTD 98; CTD-RO; Date/Time of event; DEPTH, water; Eastern Boundary Upwelling Syetms; Enhancing Prediction of Tropical Atlantic Climate and its Impact; Event label; LATITUDE; LONGITUDE; M120; M120_0900-1; M120_0902-1; M120_0903-1; M120_0909-1; M120_0922-1; M120_0924-1; M120_0927-1; M120_0936-1; M120_0938-1; M120_0940-1; M120_0942-1; M120_0958-1; M120_0971-1; M120_0989-1; M120_0995-1; M120_1006-1; M120_1009-1; M120_1012-1; M120_1015-1; M120_1018-1; M120_1021-1; M120_1024-1; M120_1031-1; M120_1033-1; M120_1035-1; M120_1041-1; M120_1043-1; M120_1047-1; M120_1050-1; M120_1052-1; M120_1054-1; M120_1056-1; M120_1096-1; M120_1109-1; M120_1111-1; M120_1113-1; M120_1117-1; M120_1121-1; M120_1125-1; M120_1128-1; M120_1131-1; M120_1133-1; M120_1137-1; M120_1138-1; M120_1140-1; M120_1142-1; M120_1144-1; M120_1146-1; Meteor (1986); Methane; Nitrous oxide; Nitrous oxide, dissolved; PREFACE; SACUS/SACUS-II; Southwest African Coastal Upwelling System and Benguela Niños; Station label; trace gases |
| url | https://doi.org/10.1594/PANGAEA.936742 |