Colette L. Heald is a Canadian-born professor at ETH Zurich who is an expert in atmospheric chemistry.

From 2006 to 2007, she held the NOAA Climate and Global Change postdoctoral fellowship at the University of California, Berkeley.

[4] Her research interests include atmospheric gases and particles and their impacts on air quality, ecosystem health and climate.

[1] She is an expert on integrating global models and observations from all scales to investigate atmospheric composition.

She is also known for her work on natural aerosol sources (bioaerosol, sulfate from DMS, smoke from fires) and how land use change impacts atmospheric chemistry.