Kähler, Paul; Pollehne, Falk (2008): Organic carbon and nitrogen concentrations in surface waters of the Arabian Sea along 65°E during the intermonsoon period of 1995 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.696182
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Coverage:
Median Latitude: 10.580349 * Median Longitude: 64.988837 * South-bound Latitude: 0.250000 * West-bound Longitude: 64.660000 * North-bound Latitude: 20.850000 * East-bound Longitude: 65.000000
Date/Time Start: 1995-05-08T02:14:00 * Date/Time End: 1995-06-02T02:28:00
Minimum DEPTH, water: 7 m * Maximum DEPTH, water: 7 m
Event(s):
M32/3_R1-1 * Latitude: 20.850000 * Longitude: 65.000000 * Date/Time: 1995-05-08T02:14:00 * Location: Arabian Sea * Campaign: M32/3 * Basis: Meteor (1986) * Method/Device: Snorkel with pump (SNORKEL)
M32/3_R1-2 * Latitude: 20.670000 * Longitude: 65.000000 * Date/Time: 1995-05-08T03:15:00 * Location: Arabian Sea * Campaign: M32/3 * Basis: Meteor (1986) * Method/Device: Snorkel with pump (SNORKEL)
M32/3_R1-3 * Latitude: 20.480000 * Longitude: 65.000000 * Date/Time: 1995-05-08T04:13:00 * Location: Arabian Sea * Campaign: M32/3 * Basis: Meteor (1986) * Method/Device: Snorkel with pump (SNORKEL)
Comment:
Not filtered water samples were taken in 10 ml ampoules (sealed immediately after being acidified with phosphoric acid to pH<2, sampling), or 40 ml screw-lid vials, and measured onboard at sampling or next days, or frozen (-20°C) until being acidified and measured in home labs.
Carbon measurement was by high-temperature catalytic oxydation in a 10 cm column packed with 5% Pt on aluminum oxide beads at 900°C in a stream of oxygen, and CO2 detection by infrared extinction after the removal of moisture and SO2 by appropriate traps (cold trap, Mg-percarbonate, Na-pyrophosphate, tin, bronze or Sulfix). The apparatus was the dual channel Dimatek 2000 equipped with a Binos 200 detector.
Nitrogen was measured by chemoluminescence detection of NO2 in the combustion gases after leaving the Binos detector in one of the two channels of the setup. Most measurements of samples containing high nitrate were discarded, when data were inconsistent. The nature of nitrate interference is not clear.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Date/Time of event | Date/Time | ||||
| 5 | DEPTH, water | Depth water | m | Geocode | ||
| 6 | Carbon, organic, total | TOC | µmol/l | Kähler, Paul | ||
| 7 | Nitrogen, organic+inorganic, particulate+dissolved | N total | µmol/l | Kähler, Paul | except nitrogen gas | |
| 8 | Carbon, organic, particulate | POC | µmol/l | Kähler, Paul | ||
| 9 | Nitrogen, organic, particulate | PON | µmol/l | Kähler, Paul |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
291 data points