This is to let you know that the 11th International Carbon Dioxide Conference (ICDC11) will be hosted in Manaus, Brazil from 29 July to 2 August 2024, at the Vasco Vasques Convention Center. ICDC11 was originally planned for 2021 but was delayed due to the COVID-19 pandemic and subsequent logistical challenges. Manaus was selected to allow visitors to experience a taste of the Amazon, a region central to understanding the global carbon cycle.

Taking place in the heart of Amazon, amidst an El Niño, and on the heels of the first Global Stocktake, ICDC11 represents an important opportunity to consider how improved understanding of terrestrial and oceanic carbon fluxes can inform carbon management and mitigation policy. The conference will provide the platform to have a dialogue between communities focused on understanding our latest science, technological capabilities and the needs, priorities and open questions of the policy and management communities.

We are pleased to inform you about releasing the updated version of the OOI Biogeochemical Sensor Data Best Practices and User Guide. The newest Version 1.1.1. after being reviewed by the biogeochemistry community, was endorsed by IOCCP as GOOS Biogeochemistry Panel of Experts. The current version is available here: https://repository.oceanbestpractices.org/handle/11329/2112.2

The Ocean Observatories Initiative (OOI) Biogeochemical (BGC) Sensor Data Best Practices and User Guide is the result of an NSF-funded (OCE2033919) grass-roots community effort to broaden the use of OOI biogeochemical sensor data and increase community capacity to produce analysis-ready data products. The guide includes five chapters: The Introduction (Chapter 1) provides information on the OOI program, including data access, processing, and recommended end user QA/QC relevant to all OOI biogeochemical sensors, and Chapters 2-5 cover the following groups of BGC variables and associated sensors: Dissolved oxygen, nitrate, carbonate chemistry, and bio-optics.

For more information about the product of the OOI Biogeochemical Sensor Data (OOI BGC) Working Group, please read the full article: https://www.us-ocb.org/ooi-dataset-community/

The EU H2020 project EuroSea has made fantastic contributions to the work of marine biogeochemistry observing and modelling communities, and IOCCP has been thrilled to be part of it over the past 4 years. We are excited to invite you to join the upcoming EuroSea Symposium on Ocean Observing and Forecasting, a high-level event bringing together national and international stakeholders from policy, science, and industry. This symposium will take place on 21 September 2023, at the IOC/UNESCO Headquarters in Paris.

Registration for the event is currently open and will close on 5 September 2023. For more information on how to register, please visit the website: https://events.geomar.de/event/233/. Please read the Symposium Agenda.

We are pleased to inform you about the call for abstracts for the Ocean Sciences Meeting 2024, which will be held in New Orleans, USA, on 18-23 February 2024. We encourage you to become familiar with the sessions relevant to the marine biogeochemistry community. You will find the list of accepted sessions for OSM24 here: https://agu.confex.com/agu/OSM24/prelim.cgi/ModuleProgramBook/0. Below we provide links to selected topics of potential interest. The abstract submissions deadline is 13 September 2023, 23:59 EDT / 03:59 +1 GMT. For further details, please visit the OSM24 website.

The Ocean Sciences Meeting (OSM) is the flagship conference for the ocean sciences and the larger ocean-connected community. Every two years, the Ocean Sciences Meeting unifies the oceans community to share findings, connect scientists from around the world, and advance the impact of science. The Ocean Sciences Meeting 2024 is co-sponsored by the American Geophysical Union (AGU), the Association for the Sciences of Limnology and Oceanography (ASLO), and The Oceanography Society (TOS).

We are pleased to inform you about the upcoming International Digital Twins of the Ocean Summit 2023, which will be held in Xiamen, China on 9-12 November 2023. Taking the great arena of 2023 World Ocean Week in Xiamen, the DITTO Summit 2023 will be co-organised by the Fujian Ocean Innovation Center and State Key Laboratory of Marine Environmental Science (Xiamen University), and to gather global participants with themes focusing on sharing the latest knowledge about DTOs and discussing future actions on advancing and applying them. The abstract submission's deadline is extended to 20 August 2023. For further details please read the Third Announcement.

We are thrilled to inform you that Ocean Acidification Week will be back in 2023. GOA-ON’s OA Week event is a virtual multi-day forum to highlight ocean acidification research for sustainability initiatives around the world. This event features plenary talks, thematic sessions featuring 3-5 talks, and community discussions. It is free and open to everyone for participation. OA Week is a great opportunity to share your research or ideas around the OA community with a wider audience. The organizers welcome all ideas for topics and sessions. If you are interested in participating in OA Week 2023, please fill out this registration survey to indicate your interest in organizing, facilitating, proposing or presenting any of the sessions before 11 August 2023.

We would like to let you know about the upcoming SOLAS seminar on "Halogen chemistry: from ocean to stratosphere" hosted by SOLAS Early Career Scientist Committee (ECSC), International Global Atmospheric Chemistry (IGAC), and Early Career Scientific Steering Committee (ECSSC). The seminar is scheduled for 25 July 2023 at 12:00 UTC and will be held on ZOOM platform. To attend the seminar please register here.

We would like to let you know about the upcoming ocean deoxygenation webinar organized by the Global Ocean Oxygen Network (IOC Expert Working Group GO₂NE). The 21st webinar will take place on 26 July 2023 at 13:00 CEST. The webinar will feature presentations by a more senior and an early-career scientist, 20 minutes each followed by 10 minutes moderated discussion sessions. Please register here.

The 3rd edition of the "Instrumenting our ocean for better observation: a training course on a suite of biogeochemical sensors" took place on June 5-17, 2023, and was hosted by Kristineberg Marine Research Station in Sweden.

The training course was attended by 28 very motivated early-career scientists from different parts of the world selected from one hundred applications. For almost two weeks 25 dedicated instructors affiliated with universities, research institutions, or sensor-producing companies, were conducting the lectures and workshops sharing their practical expertise. During the hands-on sessions, the attendees could practice sensor usage in marine environments.

We are pleased to let you know about the upcoming GOA-ON's webinar co-hosted by the North American Hub on "Global Ocean Acidification Indicators and the NOAA strategy for Carbon Dioxide Removal Research". The webinar will take place on 2 August 2023 at 15:00 UTC. Registration form is available here: https://unesco-org.zoom.us/webinar/register/WN_elOwglVnRgu2IgbTJIFjkg#/registration