Tanhua, Toste; Wallace, Douglas WR (2005): Hydrochemistry measured on water bottle samples during METEOR cruise M60/5 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.761653, Supplement to: Tanhua, T; Wallace, DWR (2005): Consistency of TTO-NAS inorganic carbon data with modern measurements. Geophysical Research Letters, 32, L14618, https://doi.org/10.1029/2005GL023248
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Abstract:
We compare alkalinity and total dissolved inorganic carbon (DIC) measurements made during the Transient Tracers in the Ocean, North Atlantic Study (TTO-NAS) in 1981 with modern measurements from a TTO reoccupation cruise in 2004 (M60/5). We find that the TTO-NAS alkalinity values are 3.6 ± 2.3 µmol/kg higher than modern alkalinity data tied to Certified Reference Materials. The TTO-NAS DIC values re-calculated from original alkalinity and discrete-pCO2 data using currently accepted constants are 3.8 µmol/kg higher than those reported in the revised TTO data set. This difference is reduced to 0.7 µmol/kg when our suggested correction to the TTO-NAS alkalinity is applied. These re-calculated DIC values are 2.4 µmol/kg too low relative to contemporaneous measurements made by the vacuum extraction/manometric Certified method. Application of this correction brings the TTO data into almost perfect agreement with modern measurements for slowly-ventilated deep water of the eastern Atlantic.
Project(s):
Coverage:
Median Latitude: 32.395065 * Median Longitude: -43.106870 * South-bound Latitude: 19.495000 * West-bound Longitude: -65.997000 * North-bound Latitude: 41.982000 * East-bound Longitude: -10.188000
Date/Time Start: 2004-03-11T00:00:00 * Date/Time End: 2004-04-13T06:52:00
Minimum DEPTH, water: 5.95 m * Maximum DEPTH, water: 5680.26 m
Event(s):
M60/5_156 (06MT60_5/156) * Latitude: 19.495000 * Longitude: -61.967000 * Date/Time: 2004-03-11T00:00:00 * Elevation: -5587.0 m * Location: North Atlantic sub-tropical gyre * Campaign: M60/5 (06MT60_5) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M60/5_157 (06MT60_5/157) * Latitude: 20.797000 * Longitude: -62.260000 * Date/Time: 2004-03-11T00:00:00 * Elevation: -5592.0 m * Location: North Atlantic sub-tropical gyre * Campaign: M60/5 (06MT60_5) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M60/5_158 (06MT60_5/158) * Latitude: 22.963000 * Longitude: -63.230000 * Date/Time: 2004-03-12T00:00:00 * Elevation: -5490.0 m * Location: North Atlantic sub-tropical gyre * Campaign: M60/5 (06MT60_5) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | ||||
2 | Date/Time of event | Date/Time | ||||
3 | Latitude of event | Latitude | ||||
4 | Longitude of event | Longitude | ||||
5 | Elevation of event | Elevation | m | |||
6 | DEPTH, water | Depth water | m | Geocode | ||
7 | Pressure, water | Press | dbar | Tanhua, Toste | ||
8 | Temperature, water | Temp | °C | Tanhua, Toste | ||
9 | Salinity | Sal | Tanhua, Toste | |||
10 | Density, mass density | Density | kg/m3 | Tanhua, Toste | ||
11 | Freon-11 (trichorofluoromethane) | CFC-11 | pmol/l | Tanhua, Toste | ||
12 | Freon-12 (dichlorodifluoromethane) | CFC-12 | pmol/l | Tanhua, Toste | ||
13 | Oxygen | O2 | µmol/l | Tanhua, Toste | ||
14 | Silicate | Si(OH)4 | µmol/l | Tanhua, Toste | ||
15 | Nitrate | [NO3]- | µmol/l | Tanhua, Toste | ||
16 | Nitrite | [NO2]- | µmol/l | Tanhua, Toste | ||
17 | Phosphate | [PO4]3- | µmol/l | Tanhua, Toste | ||
18 | Carbon, inorganic, dissolved | DIC | µmol/l | Tanhua, Toste | Coulometric titration (Knap et al., 1996, IOC Manuals and Guides 29, UNESCO) | sample volume 21 ml |
19 | Alkalinity, total | AT | mmol(eq)/l | Tanhua, Toste | Titration potentiometric | sample volume 93.4 ml |
20 | Tetrachloromethane | CCl4 | pmol/l | Tanhua, Toste |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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