Claire Valva

I am postdoc at Caltech in the department of Computing + Mathematical Sciences working with Andrew Stuart. I received my PhD in May 2025 from the Center for Atmosphere and Ocean Science at the Courant Institute of Mathematical Sciences where I was advised by Dimitris Giannakis and Ed Gerber.

I am interested in the development of reliable data-driven methods and applications of these methods to improve understanding and forecasting of the earth system. A major theme of my work is the development of operator-theoretic methods for dynamical systems and using these to study climate oscillations.

Publications

  • A more predictable Madden-Julian Oscillation index derived from Koopman spectral analysis with Edwin P Gerber, arXiv.
  • Physics-informed spectral approximation of Koopman operators with Dimitris Giannakis, paper.
  • The QBO, the annual cycle, and their interactions: Isolating periodic modes with Koopman analysis with Edwin P Gerber, paper.
  • Consistent spectral approximation of Koopman operators using resolvent compactification with Dimitris Giannakis, paper
  • Koopman analysis of the periodic Korteweg–de Vries equation with Jeremy Parker, paper.
  • What Controls the Probability Distribution of Local Wave Activity in the Midlatitudes? with Noboru Nakamura, paper.

    • CV   Google Scholar   GitHub  ORCID
     
    Annenberg Center for Information Science and Technology
    California Institute of Technology

    clairev (at) caltech.edu