Technical note: Coordination and harmonization of the multi-scale, multi-model activities HTAP2, AQMEII3, and MICS-Asia3: simulations, emission inventories, boundary conditions, and model output formats

摘要

We present an overview of the coordinated global numerical modellingexperiments performed during 2012–2016 by the Task Force on HemisphericTransport of Air Pollution (TF HTAP), the regional experiments by the AirQuality Model Evaluation International Initiative (AQMEII) over Europe andNorth America, and the Model Intercomparison Study for Asia (MICS-Asia). Toimprove model estimates of the impacts of intercontinental transport of airpollution on climate, ecosystems, and human health and to answer a set ofpolicy-relevant questions, these three initiatives performed emissionperturbation modelling experiments consistent across the global, hemispheric,and continental/regional scales. In all three initiatives, model results areextensively compared against monitoring data for a range of variables(meteorological, trace gas concentrations, and aerosol mass and composition)from different measurement platforms (ground measurements, vertical profiles,airborne measurements) collected from a number of sources. Approximately 10to 25 modelling groups have contributed to each initiative, and model resultshave been managed centrally through three data hubs maintained by eachinitiative. Given the organizational complexity of bringing together thesethree initiatives to address a common set of policy-relevant questions, thispublication provides the motivation for the modelling activity, the rationalefor specific choices made in the model experiments, and an overview of theorganizational structures for both the modelling and the measurements usedand analysed in a number of modelling studies in this special issue.