Climate Dynamics Group
at the University of California, Santa Cruz

※ summer program

The Lamat Summer Research Program on High Performance Computing in Astrophysics

Lamat is an 8-week program, June 21st-August 14th, 2020, designed to introduce students to astrophysical research methods and tools through original projects in computational astrophysics. The program targets science and engineering undergraduates currently enrolled in California community colleges.

※ research paper

Causal interactions between Southern Ocean polynyas and high-latitude atmosphere-ocean variability

Polynyas are important components of the climate system in the high-latitude Southern Ocean. Open-ocean polynyas have been observed only sporadically in the observational record, but are recurring features in high-resolution climate models. Understanding their impact on the ocean and atmosphere is hence critically important for assessing the fidelity of high-resolution climate models. This study uses Granger causality to examine the atmosphere-cryosphere-ocean interactions associated with polynyas in the high-resolution climate model E3SMv0-HR.

※ grant

The Use of Causal Discovery Techniques for Quantifying High-Latitude Climate Feedbacks

※ grant

Acquisition of a High Performance Computer for Computational Science at UC Santa Cruz

A $1.547 million grant from the National Science Foundation will fund a powerful new supercomputer for UC Santa Cruz researchers in fields ranging from astrophysics to climate science.

※ research paper

Revisiting the surface-energy-flux perspective on the sensitivity of global precipitation to climate change

Climate models simulate an increase in global precipitation at a rate of approximately 1–3% per Kelvin of global surface warming. This change is often interpreted through the lens of the atmospheric energy budget, in which the increase in global precipitation is mostly offset by an increase in net radiative cooling. Other studies have provided different interpretations from the perspective of the surface, where evaporation represents the turbulent transfer of latent heat to the atmosphere. Expanding on this surface perspective, here we derive a version of the Penman–Monteith equation that allows the change in ocean evaporation to be partitioned into a thermodynamic response to surface warming, and additional diagnostic contributions from changes in surface radiation, ocean heat uptake, and boundary-layer dynamics/relative humidity.

※ grant

The Lapse Rate Feedback and Other Mechanisms of High-Latitude Climate Change