Topic Reading-Vol.2935-4/24/2020
0422-27-5366
〒180-0006 東京都武蔵野市中町2-3-5 IIHA武蔵野1階
電話受付/月〜金 9:00-18:00
Topic Reading-Vol.2935-4/24/2020
0422-27-5366
〒180-0006 東京都武蔵野市中町2-3-5 IIHA武蔵野1階
電話受付/月〜金 9:00-18:00
Topic Reading-Vol.2935-4/24/2020
Dear MEL Topic Readers,
Climate change: US megadrought ‘already under way’
Megadrought is a long-lasting naturally occurring drought that lasts decades. It seems to occur in North America when water temperatures in the tropical eastern Pacific Ocean become cooler than normal, known as La Niña conditions. Researchers think there were four megadroughts in the western US for the last 12 centuries, in the late 800s, the mid-1100s, the 1200s, and the late 1500s. Historically, megadroughts forced the residents in the affected area to migrate to other places, which could have collapsed civilizations like the Khmer Empire of Cambodia and the Mayan of Mesoamerica.
Now, some researchers say a new megadrought has been taking place in the western US since the new millennium. Though megadrought is a naturally occurring event, the severity could be affected by climate change. Since temperatures in the western US have risen by 1.2C since the year 2000, more moisture is being pulled out of the ground.
By the way, how do researchers know what drought conditions were like in the past?
Enjoy reading the article and learn about megadrought, and also think if you want to stock up California almonds, raisins, and wines.
https://www.bbc.com/news/science-environment-52312260
電話：0422-27-5366
住所 〒181-0013 東京都三鷹市下連雀3-33-13 三鷹第二ビル101
営業時間：電話受付15時～17時 定休日：日曜日