What is IGAS?
IGAS stands for IAGOS for the GMES Atmospheric Service (although GMES has recently been renamed "Copernicus"). It's meant as a bridge between the data collected on board civil aircraft through IAGOS and the pre-operational Copernicus atmospheric service, currently represented by MACC-II. Here you can see how the IAGOS data are already being used for model evaluation within MACC-II.
What is IAGOS?
IAGOS (In-service Aircraft for a Global Observing System) is a project using commercial civil aircraft to make atmospheric measurements as part of 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 does IGAS fit in?
The IGAS project aims to provide data streams in both near-real-time and delayed mode (in WP3) to the Copernicus Atmospheric Service, currently represented by MACC-II in its pre-operational state. A major focus is to increase accessibility and interoperability by developing and implementing data base tools (in WP2), as well as to evaluate and harmonize the data quality (in WP4). The data will be used for validation of satellite measurements (using extended columns products developed in WP2) and for comparison against analyzed fields, as is already being done within MACC-II. Furthermore, IGAS seeks to enhance IAGOS measurement capabilities through targeted instrument development for the measurement of aerosols, VOCs, speciated cloud water/ice/volcanic ash particles, and water vapour (in WP5).
The scientific work done in IGAS is summarized in the figure below.