The Nobel Prize in Physics 2021 was awarded “for groundbreaking contributions to our understanding of complex systems” with one half jointly to Syukuro Manabe and Klaus Hasselmann “for the physical modelling of Earth’s climate, quantifying variability and reliably predicting global warming” and the other half to Giorgio Parisi “for the discovery of the interplay of disorder and fluctuations in physical systems from atomic to planetary scales.”
Giorgio Parisi is full professor at the Physics department of the Sapienza University of Rome and president of the Accademia dei Lincei, has made fundamental contributions in the fields of statistical mechanics and complex systems, most notably spin glasses.
The Nobel Prize announcement can be found at this link.