«

PEACETIME Data Meeting: first results underway

Over 40 scientists met in Marseille on the 6th and 7th November to share and discuss the results obtained during the recent PEACETIME oceanographic cruise (May-June 2017). The meeting, held at the Mediterranean Institute of Oceanography (MIO), gathered both the scientists that were onboard the R/V and those who were on land, and allowed the different groups involved to check on the status and the advancement of the analyses.

 

One of the main aims of the PEACETIME expedition was the characterization of the biogeochemical processes induced by atmospheric inputs over the Mediterranean Sea, and notably the response of the system to Saharan dust inputs.

To that purpose, the cruise combined in-situ observations of both the atmosphere and the ocean, as well as Climate Reactors incubation experiments. Incubation experiments were set to reproduce different water temperatures and pCO2 conditions so that scientists could assess the atmospheric impacts in both present and future climate conditions.

Moreover, the PEACETIME strategy included an “in-situ, real-time” approach: catching a real event of atmospheric deposition in Mediterranean waters, and documenting the ensemble of interactions induced on the surface ocean ecosystem. A fine-tuned team of people (on and off-board) worked together to examine quasi-real time dust transport forecasts and satellite observations, adjust the cruise track, and position the ship in an area where deposition events were forecasted.

This unique coordinated effort succeeded, and the scientists were able to sample and measure the “real-time” effects of a dust deposition event on the marine surface waters.

A first set of results concerning physical, chemical, and biological measurements on both the marine stations, the atmospheric and marine underway and the incubation experiments were presented during the meeting, and provided an interesting overview on the major findings so far.

All participants agreed on the importance of using common criteria to define the environmental framework (meteorological and physical conditions, but also the working scale resolution), and on the necessity of using homogeneous databases, with common templates that fit large databases such as the French MISTRALS, LEFE-CYBER and the GEOTRACES formats, to ease the exchange of information.

The next meeting is set on 30-31 May 2018 at LOV in Villefranche.

For further information, please visit the PEACETIME project website, http://peacetime-project.org/

Contact:

Cécile Guieu: guieu@obs-vlfr.fr

Karine Desboeufs: Karine.Desboeufs@lisa.u-pec.fr