What is IGAS?
IGAS was a project which aimed to form a bridge between the Copernicus Atmosphere Monitoring Service (CAMS, formerly called GMES) and the atmospheric measurements collected on board commercial aircraft by http://www.iagos.org/IAGOS. As an example, here you can see how IAGOS data are regularly used for model evaluation within CAMS.
What is IAGOS?
IAGOS (In-service Aircraft for a Global Observing System) installs instrumentation on board commercial civil aircraft to make atmospheric measurements during their routine flights. The scientific partners provide the certified instrumentation packages, which are then installed on aircraft of the partner airlines. IAGOS is establishing a distributed infrastructure for long-term observations of atmospheric composition on a global scale from an initial fleet of 10-20 long-range in-service aircraft of internationally operating airlines.
What is being measured?
IAGOS will provide accurate in-situ observations of greenhouse gases (GHGs), reactive gases, aerosols, and cloud particles at high spatial resolution, thereby covering the essential climate variables (ECVs) for atmospheric composition as designated by the GCOS programme (Implementation Plan for the Global Observing System for Climate in Support of the UNFCCC, 2010). The data are available from the IAGOS Central Database.
Where did IGAS fit in?
IGAS implemented both delayed-mode and near-real-time operational data transfer from IAGSO to CAMS. The database hosting the IAGOS data was further developed to increase accessibility and allow interoperability between the IAGOS Data Centre, the DLR HALO Database and the JOIN Data Centre, where CAMS data are hosted and can be manipulated with interactive tools. The data collected over the course of both IAGOS and its predecessor MOZAIC were also reevaluated to ensure a harmonized data quality and complete documentation, and the standard operating procedures were evaluated by a team of external international experts. To extend the uptake of the IAGOS data by the scientific community, tools were developed to enable the validation of satellite measurements (using extended columns when required) and for comparison against analyzed fields, as is already being done within CAMS. Furthermore, IGAS carried out instrument development to enhance IAGOS capabilities for the measurement of aerosols, VOCs, speciated cloud water/ice/volcanic ash particles, and water vapour.
The scientific work done in IGAS is summarized in the figure below.
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