Arctic warming bolsters summer heat waves
Slowing jet stream spawns weaker continent-cooling storms
![warming map](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/03/ts_summerwarming_free.jpg?fit=860%2C460&ssl=1)
SCORCHING SUMMER The waning of summer storms due to Arctic warming can exacerbate summertime heat waves across the Northern Hemisphere, such as the record-setting summer 2003 season chronicled above in Europe, new research suggests. Red regions experienced hotter July temperatures than those measured in 2001.
NASA