California Wildfires
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Meehan Crist @meehancrist · Nov 21 I’ve been watched the landscape of my childhood burn with an aching heart, and wondering how much climate change is to blame. Turns out human activity is a major driver of California’s wildfires, but not just in the ways you might imagine. (pic: Noah Berger) 1/10 https://t.co/aX1CIJSrGi
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mechanism narrative |
Meehan Crist @meehancrist · Nov 21 Fires need 3 things to burn: fuel, oxygen, and ignition. A warming climate means less rain and less humidity, which means that California’s vegetation - potential fuel - is dryer than before. 2/10 |
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Meehan Crist @meehancrist · Nov 21 Drier fuels—grasses, shrubs, forests—catch fire more easily, allowing fires to grow bigger and spread faster. So, there’s your fuel. Next, oxygen… 3/10 |
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Meehan Crist @meehancrist · Nov 21 When you build a fire in a fireplace, you use a bellows or hearty lungfuls of air to blow oxygen across lit kindling and get the flames really crackling. The state of CA has its own natural bellows. 4/10 |
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Meehan Crist @meehancrist · Nov 21 The Santa Anna winds in Southern CA and the Diablo winds in Northern CA are powerful wind events that have been happening in the fall for thousands of years. But climate change is both making them stronger… 5/10 https://t.co/Jji2AJ3qv0 |
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Meehan Crist @meehancrist · Nov 21 and extending the hot, dry period in the fall, when these powerful winds arrive after months of little, if any, rain. When these winds gust across the tinderbox of parched vegetation, all you need is a spark to ignite a crisis. 6/10 |
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Meehan Crist @meehancrist · Nov 21 Which brings us to ignition. The state’s failing power infrastructure, controlled by the private utility PG&E, has sparked hundreds of wildfires in recent years, a handful of which have been catastrophic. 7/10 https://t.co/IibLv4wUtr |
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Meehan Crist @meehancrist · Nov 21 But at the same time, developers are building in previously undeveloped, increasingly fire-prone areas, which means extending electrical lines and other power infrastructure into fire-prone areas... 8/10 |
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Meehan Crist @meehancrist · Nov 21 and increasing the possibility of potentially devastating fires across the state. 9/10 https://t.co/cqaZGeWHfg |
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payoff |
Meehan Crist @meehancrist · Nov 21 So as I watch my home state burn, I see how climate change contributes and how people continue to erect subdivisions in a tinderbox as if it doesn’t. 10/10 |