Center for Climate Science

Alex Hall and researchers at U.C.L.A. have forecast that Los Angeles is likely to see a sharp increase in the number of days of extreme heat — defined as 95 degrees or higher.

A new study by Chad Thackeray and Alex Hall at UCLA narrows down forecasts for an “ice-free” Arctic to between 2044 and 2067. The researchers used a new approach using sea-ice albedo, or reflectivity, to improve the accuracy of climate models predicting Arctic sea ice loss.

According to a new study by Chad Thackeray and Alex Hall, human-caused climate change is on track to make the Arctic Ocean functionally ice-free for part of each year starting sometime between 2044 and 2067.

Chad Thackeray and Alex Hall assessed 23 models’ depiction of seasonal ice melt between 1980 and 2015 and compared them with the satellite observations.  Their study finds that the Arctic Ocean may be ice-free for part of the year by 2044. 

Pomona College alumnus and Director of UCLA’s Center for Climate Science, Alex Hall, says “I think it’s time to divest.  Pomona should be a leader, not a follower.”

Chad Thackery and Alex Hall research the surface’s reflectivity of sunlight, or albedo, that causes greater local warming, which in turn leads to further ice melt.  They find that the Arctic Ocean may be ice-free for part of the year as soon as 2044.  

Alex Hall, a professor of atmospheric and oceanic sciences and director of the Center for Climate Science at UCLA, told The Daily Beast that temperature increases driven by climate change are certainly a major factor.  “Especially in the last five years, there’s been a dramatic increase in the intensity of wildfires. That is, in part,...

Alex Hall, a professor of atmospheric and oceanic sciences at UCLA, said the fires are currently being driven by strong, dry winds coming from the interior west of North America. The direction of the winds is important for how the fires evolve, he said. “When (the winds) pass over the very dry vegetation that has...

Alex Hall, climate scientist and director of the UCLA IoES Center for Climate Science, talks with KCRW’s Steve Chiotakis about what climate change has in store for the Los Angeles region—and what we can do about it.

Although there are several factors that play into why the state’s wildfires have been getting more frequent and devastating, a new study, published this month in the journal Earth’s Future, indicates that climate change is a big factor. The study “documents pretty carefully that there’s a strong relationship between summertime fire and temperature,” said Alex...

Professor Alex Hall was on a panel about sea level rise hosted by Zócalo Public Square. Here is a highlight from the event: Why are seas rising? Around 45% of sea level rise has occurred because the ice sheets and mountain glaciers are melting, Hall said. Another 45% is happening because the ocean has expanded...

California Climate Expedition, a bicycle tour from Oakland to Los Angeles — led by UCLA climate scientist Alex Hall — grants riders the chance to experience climate change impacts in California first-hand. Organized by OnePulse, a group that plans cycling journeys for charitable causes, the ride is raising funds for the UCLA Center for Climate...