Generalized Aerosol/Chemistry Interface (GIANT)

Alma Hodzic, Natalie Mahowald, Matthew Dawson, Jeffrey Johnson, Ligia Bernardet, Peter A. Bosler, Jerome D. Fast, Laura Fierce, Xiaohong Liu, Po Lun Ma, Benjamin Murphy, Nicole Riemer, Michael Schulz

Research output: Contribution to journalArticlepeer-review


Atmospheric aerosol and chemistry modules are key elements in Earth system models (ESMs), as they predict air pollutant concentrations and properties that can impact human health, weather, and climate. The current uncertainty in climate projections is partly due to the inaccurate representation of aerosol direct and indirect forcing. Aerosol/chemistry parameterizations used within ESMs and other atmospheric models span large structural and parameter uncertainties that are difficult to assess independently of their host models. Moreover, there is a strong need for a standardized interface between aerosol/chemistry modules and the host model to facilitate portability of aerosol/chemistry parameterizations from one model to another, allowing not only a comparison between different parameterizations within the same modeling framework, but also quantifying the impact of different model frameworks on aerosol/chemistry predictions. To address this need, we have initiated a new community effort to coordinate the construction of a Generalized Aerosol/Chemistry Interface (GIANT) for use across weather and climate models. We aim to organize a series of community workshops and hackathons to design and build GIANT, which will serve as the interface between a range of aerosol/chemistry modules and the physics and dynamics components of atmospheric host models. GIANT will leverage ongoing efforts at the U.S. modeling centers focused on building next-generation ESMs and the international AeroCom initiative to implement this common aerosol/chemistry interface. GIANT will create transformative opportunities for scientists and students to conduct innovative research to better characterize structural and parametric uncertainties in aerosol/chemistry modules, and to develop a common set of aerosol/chemistry parameterizations.

Original languageEnglish (US)
Pages (from-to)E2065-E2080
JournalBulletin of the American Meteorological Society
Issue number11
StatePublished - Nov 2023


  • Aerosols
  • Atmosphere
  • Climate models
  • Global transport modeling
  • Model evaluation/ performance

ASJC Scopus subject areas

  • Atmospheric Science


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