Stable isotopes of the water vapour in the Atmospheric boundary layer from five Atlantic Ocean cruises in 2012-2015

The marine boundary layer atmospheric water vapour isotopic composition (¹H2¹⁶O, H₂¹⁸O and ¹H²H¹⁶O) has been measured above the Atlantic Ocean from 5 research vessels between 2012 and 2015. Using laser spectroscopy analysers, measurements have been carried out semi-continuously on samples collected 10-20 meter above sea level.

All the datasets have been carefully calibrated against the international VSMOW-SLAP scale following the same protocol to build a homogeneous dataset covering the Atlantic Ocean between 4°S to 63°N. In addition, standard atmospheric parameters have been continuously measured by weather stations, as well as sea surface temperature with a calibrated Thermo-Salinograph for most cruises. All calibrated observations are provided with 15-minute resolution. We also provide 6-hourly data to allow easier comparisons with simulations from the Atmospheric Global Circulation Models. In addition, back trajectories from the Hysplit model are supplied every 6 hours for the position of our measurements.

Figure 1: Map of continuous measurements provided during the 5 cruises between 2012 and 2015 over the Atlantic Ocean.
In black: STRASSE, in magenta: PIRATA FR24, in green: RARA, in red: ACTIV, in blue: BERMUDA.

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Contacts : Marion Benetti - Hans Christian Steen-Larsen

This work is licensed under a Creative Commons Attribution 4.0 International License.