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Zooming in on L.A.’s Warming Climate

First-of-its-kind study breaks down predictions for 27 L.A. microclimates

Kimberly Ayers

Green roofs like this one at Vista Hermosa City Park are part of the solution for Los Angeles

Listen to the radio version of this story on The California Report.

The City and County of Los Angeles now have customized climate predictions, thanks to a new UCLA study that took global climate science and made it local. A UCLA supercomputer ran for eight months to downscale 22 different global climate models, distilling them into a surgically precise look at L.A. County and beyond. It’s a new kind of Hollywood close-up and it’s a sobering one: temperatures will rise in areas of Los Angeles County by an average of 4 to 5 degrees by mid-century.

Commissioned by the city of Los Angeles, funded by a U.S. Department of Energy grant and conducted by UCLA’s Department of Atmospheric and Oceanic Science, the study focused on forecasting for the metro area between 2041 and 2060. But instead of relying on the global climate model grids that use data from 100 kilometer-square cells of the earth’s surface, the UCLA team’s “quintillion-plus” calculations — yes, that’s with 18 zeros — zoom in to a resolution of 2 square kilometers, just over a square mile.  So instead of data and forecasting for the whole county, you can talk specifically about climate change for Corona, for example. Continue reading