Biogeochemical-Argo NEWS Issue#4
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Note from the editors

We are pleased to share with you the 4th Biogeochemical-Argo Newsletter which highlights the main activities over the last four months.

We would like to welcome three new Scientific Steering Committee Members: Fei Chai (SIO/SOA, China), Satya Prakash (INCOIS, India) and Tom Trull (CSIRO, Australia). Note that Tom Trull will replace Nick Hardman-Mountford who we thank for his active contribution in the early phases of BGC-Argo development.

We would like also to invite you to visit our rich "dissemination" webpages where materials for the public in general are available, as well as outreach initiatives. We welcome your projects or your interviews, thank you to send your contributions.

Please do not hesitate to disseminate this newsletter and subscribe to carry on receiving it! ... and follow Biogeochemical-Argo on Twitter @bgc_argo
Hervé Claustre & Ken Johnson
co-chairs of the Biogeochemical-Argo program
Upcoming event

Ocean sciences meeting 2018 BGC-Argo session  

Please note in your agenda the session on BGC-Argo at the Ocean Sciences Meeting 2018, Oregon, USA, on 16 February 2018, BN53A: Biogeochemistry and Nutrients in Open-Ocean Waters: Sustainable Ocean Observations from Profiling Floats and Time Series III
Upcoming event

Japan Argo will host the 6th Argo Science Workshop  

The 6th Argo Science Workshop will be organised in Tokyo, Japan, on October 22-24, 2018.

As part of this meeting, a special focus will be dedicated on BGC-Argo related science.
Upcoming event

Ocean Obs’ 19 – Call for abstracts

Ocean Obs’19, September 16 ,2019., Honolulu Convention Center, HI 96815, USA.

The conference themes of the ocean Obs’19 have been published on the website, and the abstract submission is now open.
Past meeting

Biogeochemical-Argo session @ ADMT 18 meeting 2017

The agenda, presentations and reports of the last BGC-Argo meeting as part of at the ADMT 18 meeting (Hamburg, Germany, November 27-28) are now available.
Past meeting

International Biogeochemical-Argo Technology and Application in China

An International Workshop on Biogeochemical-Argo Technology and Application was held in Hangzhou, China from 10 to 11 October 2017. More than 15 researchers from various universities and institutions were attending. A report will soon be published.

Biogeochemical-Argo floats deployments

South Atlantic

6 pH/O2 floats have just been deployed in the South Atlantic for the ORCHESTRA program. The floats were deployed in a tight group in the South Atlantic at 52.5S, 40W, to provide a test of the performance of early production models of the SBE pH sensor. After 35 daily cycles they are starting to disperse, and are now spread over 100km domain. They will soon be switched to a more conventional Argo 10-day cycle. A variety of diagnostic plots and data are available by FTP (
So far the pH sensors have shown good stability and appear to be performing as intended. (PI: Brian King, NOC, UK).

Western subarctic North Pacific

2 new Argo Floats, APEX BGC & Deep NINJA including a RINKO DO sensor, were deployed in subarctic North pacific, during the R/V Mirai cruise (JAMSTEC, 7/10-8/2) at station K2, end of July. (PI: Tetsuichi Fujiki, JAMSTEC, JAPAN).

Equatorial Pacific

The first two of 16 planned floats were deployed in the equatorial Pacific with pH, oxygen, bio-optics and Passive Acoustic Listener (PAL) sensors (12717EqPac and 12728EqPac at FloatViz, and WMO 5905139 and 5905140 at the GDAC) by the University of Washington.
These floats are part of a TPOS (Tropical Pacific Observing System) program to explore new methods for monitoring the equatorial system.  The PAL sensors give an estimate of wind speed while the float is at park depth, while pH can be used to estimate surface pCO2. (PIs: Steve Riser, Jie Yang and Ken Johnson, MBARI, USA)

First profiling float measuring
simultaneously all 6 cores

Successful test of the first profiling float measuring simultaneously all 6 core variables: Oxygen concentration, Nitrate concentration, pH, Chlorophyll a concentration, Suspended particles, Downwelling irradiance.
The test has been done in Villefranche-sur-mer, France. (PI: Hervé Claustre, LOV, FRANCE).
Supported by the EU funded H2020 AtlantOS project.

Featured BGC-Argo articles by Nature News & Views

Ocean hotspots of nitrogen loss, Fennel K. (2017)
Nature, 551: 305-306  
Participating countries

National Report on BGC-Argo

The report on the Canadian BGC Argo workshop has been released. Taking the Ocean’s Pulse: A Vision for the Canadian Biogeochemical Argo Program. Fennel Katja, Greenan Blair (2017) | DOI :10.13155/52451.

BGC-Argo at COP23

The observing systems: Argo, BGC-Argo, GO-SHIP were integrated into a press conference ‘Context is everything: Perspectives on Past, Present, and Future Climate Change’ given by Alan Seltzer & Lynne Talley in Bonn, during the COP23 meeting in November 2017.

Focus on BGC-Ago Webpages

The Dissemination web pages include scientific highlights, but also outreach activities and materials for the public at large.

In the section Media & resources, we can post press articles, interviews, but also videos on BGC-Argo cruises. Do not miss the videos of SOCLIM, SOCCOM and PEACETIME cruises. Please provide us with materials…
Have fun with the different science-based outreach initiatives developed by the partners, such as "adopt a float".
The  external scientific articles on biogeochemical observation are published as scientific highlights.

BGC-Argo profiles on January 2018

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