Peter M Caldwell

Deputy Group Leader, Cloud Processes Research & Modeling
Atmospheric, Earth, and Energy Division
Phone: +19254224197


  • PhD, Atmospheric Sciences, University of Washington, 2007
  • MS, Mathematics, Western Washington University, 2001
  • BS, Mathematics, Western Washington University, 1999

Professional Experience

Peter Caldwell is a staff scientist in and deputy group leader for the Cloud Process Research (CPR) group at the Department of Energy's Lawrence Livermore National Laboratory (DOE LLNL) in Livermore, California. His research is broadly focused on clouds and their role in climate change with special interest in stratocumulus, cloud feedback, high-resolution global climate model development and evaluation, regional climate modeling, numerics of climate models, and statistical analysis of climate model ensembles. Peter was recently a co-leader for atmospheric and coupled model development for DOE's $18M/yr Accelerated Climate Model for Energy (ACME) project. He is currently leading a team focused on numerics of parameterizations for DOE's Scientific Discovery through Advanced Computing (SciDAC) and Climate Model Development and Validation (CMDV) projects.

Peter came to LLNL in 2007 as a postdoc working on regional climate modeling. Before that, he worked on his PhD at the University of Washington (UW) under the tutelage of Christopher S. Bretherton. While at UW, Peter used observations and simple models to understand the physical processes underlying stratocumulus response to a changing climate. Peter's original background is in math and much of his current research spans the boundaries between climate science, numerical analysis, statistics, and computer science.

Professional Employment

Sept 2007–Sept 2009: Postdoctoral Researcher, Lawrence Livermore National Laboratory, Livermore, California

Sept 2009–present: Staff Scientist, Lawrence Livermore National Laboratory, Livermore, California

Leadership Positions

  • Atmosphere Model Working Group Co-Chair for Community Earth System Model (2015–current).
  • Associate Editor, Journal of Advances in Earth Systems (2017–current).
  • Deputy Group Leader for Cloud Processes Research team (2014–current).
  • Leader of Process Integration team for DOE's Multiscale SciDAC project (2012–current)
  • Co-leader for atmospheric model development, DOE's ACME project (2014–2015)
  • Co-leader for coupled model development, DOE's ACME project (2014–2015)
  • LLNL PI for ACME (2014–2015)
  • LLNL PI for Multiscale SciDAC (2014–current)
  • Deputy PI for multi-lab CMDV-Software project (2016–current)


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