iGOS4M is the mercury isotope chapter of GOS4M (Global Observation System for Mercury), which is aimed to support the MC Secretariat, the UN Environment and all Nations in the implementation of the Minamata Convention on Mercury and the activity related to the Effectiveness Evaluation and Global Monitoring framework. 

GOS4M is built on existing networks and observing infrastructures – currently it provides a link to the Global Mercury Observation System (GMOS – www.gmos.eu), and as soon as the governance will be defined it will include also the existing regional networks like Atmospheric Mercury Network (AMNet), the National Atmospheric Deposition Program (MDN), the Asia-Pacific Mercury Monitoring Network and other national sites. The worldwide observation system for the measurement of atmospheric mercury in ambient air and precipitation will include ground-based monitoring stations, shipboard measurements over the Pacific and Atlantic Oceans and European Seas, and aircraft-based measurements.

iGOS4M is an international effort with multiple objectives:

1. Organize peer-reviewed mercury isotope data into a single online open access database.

2. Share mercury isotope concepts, sampling and measurement protocols, and tutorials.

3. Promote mercury isotope signatures as essential variables of the GOS4M monitoring efforts.

4. Enable the design and production of mercury isotope applications in support of policy implementation.

A preliminary mercury isotope database is available here, and was published by Kwon et al., 2019, Earth Science Reviews 

The current database was launched and made public at the online 2022 ICMGP Conference, accompanied by a workshop (pdf presentation here).