Atmospheric Rivers: What They Are and What They Mean for California
What is an atmospheric river?
An atmospheric river is a narrow corridor or filament of concentrated moisture in the atmosphere. It forms when warm, moist air from the ocean rises and cools, releasing its moisture as rain or snow. Atmospheric rivers can stretch for hundreds of miles and can transport as much water as a river.
How do atmospheric rivers affect California?
Atmospheric rivers are responsible for up to 50% of California's annual precipitation. However, they can also cause flooding, mudslides, and other hazardous conditions. In January 2023, a series of atmospheric rivers led to widespread flooding in California, causing an estimated $1 billion in damage.
What is explosive cyclogenesis?
Explosive cyclogenesis is a meteorological phenomenon in which a mid-latitude cyclone rapidly intensifies. This can occur when an atmospheric river interacts with a cold front. Explosive cyclogenesis can cause strong winds, heavy rain, and flooding.
What is the difference between an atmospheric river and a tropical cyclone?
Atmospheric rivers are long, narrow filaments of moisture, while tropical cyclones are rotating storms. Atmospheric rivers are driven by the flow of warm, moist air from the ocean, while tropical cyclones are driven by the release of heat from the ocean surface.
How can we prepare for atmospheric rivers?
There are a number of ways to prepare for atmospheric rivers, including:
- Stay informed about weather forecasts and warnings.
- Have an emergency plan in place.
- Stock up on food, water, and other essential supplies.
- Protect your property from flooding.
- Be prepared to evacuate if necessary.
Conclusion
Atmospheric rivers are a powerful and potentially hazardous weather phenomenon. By understanding what they are and how they affect California, we can better prepare for and mitigate their impacts.
