resilience | One of the worst North American droughts in history could be getting a whole lot worse. According to the latest U.S. Drought Monitor Map
released on Tuesday, more than 58 percent of California is in an
“exceptional drought” stage. That’s up a staggering 22 percent from last
week’s report. And, in its latest drought report released earlier
today, the National Drought Mitigation Center warned that “bone-dry”
conditions are overtaking much of the Golden State, and noted that,
overall, California is “short more than one year’s worth of reservoir
water, or 11.6 million acre-feet, for this time of year.”
All across California, streams are drying up, crops are dying off and local communities are struggling to maintain access to water,
thanks to 3 years of persistent drought conditions. The situation is so
dire that on Tuesday, California implemented state-wide emergency water-conservation measures,
in an effort preserved what remaining water there is. Under the new
measures, Californians can face fines of up to $500 per day for using
hoses to clean sidewalks, run decorative fountains, and other
water-guzzling activities.
Unfortunately, while the situation in California is already pretty
bleak, it looks like things are only going to get worse. In fact, it’s
possible that all of the American southwest could soon be seeing the
devastating drought conditions that Californians are facing. That’s
because the largest surge of heat ever recorded moving west to east in
the Pacific Ocean, often referred to as a Kelvin Wave, which was
supposed to start an El Nino and bring tropical-like rains to the West
Coast and southwest, just dissipated, after it was absorbed by
abnormally warm ocean waters.
An El Nino is marked by the prolonged warming of Pacific Ocean
surface temperatures, when compared to the average temperature. El Ninos
usually happen every two to seven years, and can last anywhere between
nine months and two years. As warm water spreads from the western
Pacific and the Indian Ocean to the eastern Pacific, it brings rain and
moisture with it, bringing rain to California and the American
Southwest.
So, during an El Nino period, winters are often a lot wetter than
usual in the southwest U.S., including in central and southern
California, where drought conditions are currently the worst. That’s why
Californians were hoping for a strong El Nino period, to bring the
rains and moisture that’s needed to help ease the drought.
Unfortunately, while some weather models are still predicting that an
El Nino is possible, the chances of an El Nino strong enough to break
the devastating drought that California is seeing are now very, very
slim. As a result, there’s probably no end in sight to the current
drought conditions in California. And, since warm ocean waters that
bring rain are moving farther north up the Pacific, while Oregon and
Washington and Alaska will get rain, the jet stream is set to extend
drought-like conditions to much of the southwest.
0 comments:
Post a Comment