(2023). Continuous underway measurements of atmospheric and dissolved CO2, SES_UNLUATA_GR1 cruise, Spring 2008. SEANOE. https://doi.org/10.17882/97636
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Continuous underway measurements of atmospheric and dissolved CO2, SES_UNLUATA_GR1 cruise, Spring 2008
Continuous underway measurements of atmospheric and dissolved CO2 were performed on board R/V Aegaeo during the cruise SES_UNLUATA_GR1 that were conducted in the frame of the SESAME-IP project during the period 21/03 - 05/04/2008. The dataset includes Surface underway chemical and physical data collected in the Ionian and Aegean Seas, as well as in the area of Ierapetra AC. .
Disciplines
Chemical oceanography
Keywords
Air–sea exchange of CO2, greek seas
Location
40.984709N, 34.862317S, 27.020066E, 18W
Devices
Sea surface salinity and seawater temperature
Sea surface salinity and seawater temperature were measured continuously using a permanently installed Thermosalinograph system equipped with SeaBird SBE 21 CTD probe. The Thermosalinograph used seawater from the ship’s bow intake located ~2.0 m below the sea surface.
CO2 measurements
Analyzer
Non-dispersive infrared (NDIR) analyzer Gascard II (Edinburg Instruments) daily calibrated with two standard gases of 400 ppm and 500 ppm (Air Liquide) and a zero CO2 (0 ppm) reference gas (CO2 standard gas passing through a soda lime column). The calibration gases were dehydrated by passing through a 30-cm glass tube filled with Sicapent (P2O5) drying agent containing a coloured indicator.
All air streams were dried prior to going to the NDIR detector by passing through the Sicapent tube.
Shower head chamber equilibrator
Seawater was pumped continuously from the bow intake located ~2.0 m below the sea surface, using the ship’s water pump system and was sprayed into a Weiss equilibrator at 12–15 L/min and headspace recirculation flow rate is ~150 ml/min. The equilibrator chamber’s temperature is generally ~0.4 °C higher than seawater temperature, thus this value was used to correct pCO2.
Data
| File | Size | Format | Processing | Access | end of embargo | |
|---|---|---|---|---|---|---|
data | 27 Ko | CSV | Processed data | 2025-12-31 |
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