1/14/25 - Seawater Being Dumped On LA Wildfires
Seawater Use in Los Angeles Wildfires: A Risky but Necessary Measure
AI Summary:
• Due to limited freshwater resources, firefighters in Los Angeles are using seawater from the Pacific Ocean, via Super Scoopers, to combat wildfires, a method employed only when winds are calm enough for safe operation.
• While seemingly a simple solution given the ocean's abundance of water, using seawater presents significant drawbacks; the salt corrodes firefighting equipment and can harm ecosystems, particularly the chaparral shrublands surrounding Los Angeles, which are not naturally exposed to saltwater.
• Research from the TEMPEST experiment at the Smithsonian Environmental Research Center reveals that while coastal forests initially show resilience to short-term saltwater exposure, prolonged or intense exposure (like a 30-hour saturation) can lead to significant damage, including premature leaf browning and defoliation, especially during drought conditions.
• The study highlights that the salt alters soil chemistry and structure, causing changes that can persist for years, leaching carbon-based compounds and affecting soil water clarity.
• Although seawater offers a crucial firefighting resource in emergencies, the long-term ecological consequences of its use, coupled with the accelerating effects of sea-level rise and saltwater intrusion on coastal ecosystems, necessitate careful consideration and further research into the risks involved.
https://www.pbs.org/newshour/science/planes-are-dumping-ocean-water-to-fight-the-los-angeles-fires-heres-why-using-saltwater-is-typically-a-last-resort
