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Carbonyl Sulphide: new ways of Observing the Climate System

Total Cost €


EC-Contrib. €






 COS-OCS project word cloud

Explore the words cloud of the COS-OCS project. It provides you a very rough idea of what is the project "COS-OCS" about.

limited    signal    isotopologues    regulating    inverse    sulphide    first    resides    effect    model    depends    budgets    small    larger    contrary    characterise    cooling    ssa    collect    stratosphere    building    carbonyl    cos    stations    gas    vertical    altitude    mechanisms    aircraft    abundant    cruises    diagnostic    unlock    sulphur    trace    variations    latitudes    intricately    photosynthetic    km    performed    atmosphere    spatial    fundamentally    sampled    framework    form    co2    layer    terrestrial    destruction    untapped    potentially    nbsp    ship    biogenic    coupled    planet    sulphate    atmospheric    breakthroughs    decade    diagnose    deeper    techniques    combines    climate    quantify    amount    linked    transition    stratospheric    samples    satellite    multispecies    biosphere    abundance    aerosols    precursor    aircores    compound    isotope    data    profiles    innovative    source    ocean    integrate    sequester    removal    budget    enabled    capacity    16    dominant    coverage   

Project "COS-OCS" data sheet

The following table provides information about the project.


Organization address
postcode: 6708 PB

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Netherlands [NL]
 Total cost 2˙462˙135 €
 EC max contribution 2˙462˙135 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2017
 Duration (year-month-day) from 2017-09-01   to  2022-08-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    WAGENINGEN UNIVERSITY NL (WAGENINGEN) coordinator 927˙624.00
2    UNIVERSITEIT UTRECHT NL (UTRECHT) participant 950˙137.00


 Project objective

The future climate of our planet strongly depends on the capacity of the biosphere to sequester atmospheric CO2, and on the abundance of stratospheric sulphate aerosols (SSA). These aerosols form a layer that resides at about 16 km altitude that, contrary to CO2, has a cooling effect on climate. These two climate-regulating mechanisms are intricately linked to the atmospheric trace gas carbonyl sulphide (COS).  COS is the most abundant sulphur compound in our atmosphere. The dominant COS source is biogenic activity in the ocean, while uptake by the terrestrial biosphere, and a small amount of destruction in the stratosphere, contribute to its removal. The COS loss to the biosphere could potentially be used to quantify photosynthetic CO2 uptake, while its stratospheric destruction is an important precursor for the formation of SSA. A deeper understanding of atmospheric COS variations would therefore signal a major step forward in our ability to diagnose CO2 uptake and SSA formation. With this research program, I aim to fundamentally improve our limited understanding of the COS budget. The program combines innovative modelling and measurements. I aim to collect samples from aircraft, ship cruises, and stations across all latitudes, on which highly challenging analyses of COS and its isotopologues will be performed. To characterise the important transition to the stratosphere, vertical COS profiles up to 30 km will be sampled with so-called “AirCores”. A larger spatial coverage will come from currently untapped satellite data of COS isotopologues. My program will integrate these measurements into the first multispecies and isotope-enabled inverse modelling framework for COS, building on techniques I developed during the past decade. The measurements and model together will allow breakthroughs in the coupled COS and CO2 budgets, and unlock the potential of COS as new climate diagnostic.


List of deliverables.
Data Management Plan Open Research Data Pilot 2020-03-24 09:14:13

Take a look to the deliverables list in detail:  detailed list of COS-OCS deliverables.


year authors and title journal last update
List of publications.
2018 Maarten Krol, Marco de Bruine, Lars Killaars, Huug Ouwersloot, Andrea Pozzer, Yi Yin, Frederic Chevallier, Philippe Bousquet, Prabir Patra, Dmitry Belikov, Shamil Maksyutov, Sandip Dhomse, Wuhu Feng, Martyn P. Chipperfield
Age of air as a diagnostic for transport timescales in global models
published pages: 3109-3130, ISSN: 1991-9603, DOI: 10.5194/gmd-11-3109-2018
Geoscientific Model Development 11/8 2020-03-24

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