Four Degrees Fahrenheit, Two Degrees, One Degree discussed on Greater LA



Series of programming on the issue of climate change and there been some dire predictions about its impact in the coming years right now we're gonna talk about how the warming plan it will affect us right here in southern California in those coming years and decades Alex hall heads up UCLA center for climate science professor welcome thank you it's great to be here you bet the climate is changing we know that scientists the vast majority of scientists on earth say the climate is changing in a large part of that is a rising temperature so how our southern California temperatures going to change in the coming years and decades how much warmers are gonna get. well we've already seen significant warming in California on the order of a degree or two Fahrenheit over the past century and will continue to see rising temperatures over the coming decades by the mid century we should see temperature increases on the on average of three to four degrees Fahrenheit and that has big implications for for a lot of things including sheet extremes in southern California we know that how do we know temperatures I mean we know the temperatures have been rising in the past how do we know that they're going to continue to rise well we know that when you increase greenhouse gases in the atmosphere that leads to warming and we know that greenhouse gases are increasing in the atmosphere due to emissions due to fossil fuel burning and we know that's going to continue to a large degree and so we can then predict how that will impact temperatures by just asking the question how much extra heat is trapped by those projected increases in greenhouse gases in in the effects will be felt in different places in different ways right like people along the coast are going to be as warm as the people in line which is what we see right now right so in southern California we already have temperatures that are very different and Linda near the coast if you look near the coast temperatures are typically cooler there's a natural air conditioning that comes from the ocean from the nice breeze that we got during the afternoon from the ocean and that affect will continue to moderate temperatures I'm very near the coast but if you go even just a little bit inland say even to downtown Los Angeles you'll see a pretty pretty big increases in temperature and big increases in heat extremes so so we're talking about several degrees over the course of of decades it doesn't sound like a whole lot one degree here two degrees there it does mean that LA's average summer highs will be much harder toward the end of the century right. yes so if you look further it it forward in time and you look at the end of the century and you imagine that we keep increasing greenhouse gas emissions as we have you really see Los Angeles becoming a very different place so the what the winters would become much more like the spring and fall that we have now and the spring and fall the we have now become much more like summer and our summers would become something that we just don't have here in Los Angeles something much closer to what Phoenix for example experiences during the summertime Phoenix is hot in the summer as we know Phoenix is also just today saying a lot of flooding monsoonal rains it don't really happen in Phoenix very often and and I wonder because we're talking about water is well it's not just heat it's water is well and that's a big one for us here in southern California what is climate change mean for our water supply in the precipitation that happens here in in these parts so climate change has huge implications for our water resources we already live in a region that is semi arid and is reliant on.

Coming up next