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2018 Was A Wet Year

March 20, 2019 By EarthWise Leave a Comment

Recent news reports noted that 2018 was the fourth hottest year on record.  But the changing climate is not just about temperature.  2018 was also the third-wettest year since 1895, when steady record-keeping began.

Overall, the U.S. recorded 4.68 inches more precipitation in 2018 than the 20th century average.  But all that rain and snow was nothing like evenly distributed.  The eastern half of the country – especially in places like North Carolina and Virginia – saw record amounts of precipitation, while most of the West remained stuck in drought.

The warming climate leads to precipitation extremes at both ends, meaning that wet places are likely to get wetter and dry places drier.  There has been a marked upward trend in short-duration extreme events.   For example, Cyclone Mekunu dumped almost 13 inches of rain on Salalah, Oman in 36 hours, more than double its annual average rainfall.

In the southeast and eastern U.S., the trend toward stronger storm events is mostly driven by strong warming of the oceans that fringe their shores.  Warm oceans evaporate more water into the air and warm air holds more water than cooler air.  Warmer, moisture-laden air acts like a blanket over the land, keeping heat trapped near the ground.  Many of the states that had their wettest-ever years also set records for high minimum temperatures – their coldest temperatures were less cold than in the past.

Air temperatures are projected to warm up even further in the coming years and, as a result, many scientists are anticipating that extreme precipitation events will only get more extreme.  The pattern of drought in the west and wetness in the east is likely to stay.

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2018 was the U.S.’s third-wettest year on record—here’s why

Photo, posted August 18, 2018, courtesy of Jim Lukach via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Oman’s Rocks

June 13, 2018 By EarthWise Leave a Comment

https://secureservercdn.net/198.71.233.66/22d.937.myftpupload.com/wp-content/uploads/2018/05/EW-06-13-18-Omans-Rocks.mp3

There is growing interest in the idea of capturing and storing carbon dioxide.  Reducing the amount of it we are putting into the atmosphere is essential for limiting the effects of climate change, but even eliminating emissions entirely is not enough because the CO2 already there stays in the atmosphere for decades or more.

[Read more…] about Oman’s Rocks

Whale Sharks

September 9, 2016 By WAMC WEB

https://secureservercdn.net/198.71.233.66/22d.937.myftpupload.com/wp-content/uploads/2016/08/EW-09-09-16-Whale-Sharks.mp3

Whale sharks are the largest fish in the sea.  They can grow more than 40 feet in length, weigh up to 47,000 lbs, and have a lifespan of about 70 years.  They can be found cruising in the open waters of tropical oceans.  But despite being enormous, whale sharks are no threat to humans.  The docile beasts, which feed almost exclusively on plankton, have often been referred to as “gentle giants.”

[Read more…] about Whale Sharks

Saving The Sea From Salt

July 18, 2016 By WAMC WEB

https://secureservercdn.net/198.71.233.66/22d.937.myftpupload.com/wp-content/uploads/2016/07/EW-07-18-16-Saving-the-Sea-from-Salt.mp3

The Persian Gulf along with the Red and Mediterranean seas are getting saltier all the time because of the waste products of desalination.   The United Arab Emirates, Saudi Arabia, Kuwait, Qatar, Bahrain and Oman account for 45% of the world’s desalination capacity.  And the byproduct of desalination is brine, which is twice as salty as seawater.   Even advanced desalination plants produce two cubic meters of waste brine for every one cubic meter of clean water.

[Read more…] about Saving The Sea From Salt

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