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Death Valley Flooding | Earth Wise

September 13, 2022 By EarthWise Leave a Comment

Flooding in Death Valley

Furnace Creek in Death Valley is the driest place in North America.  Its average annual rainfall is under two inches.  On August 5th, a thousand-year rainfall event dropped 1.46 inches of rain – about three-quarters of a year’s precipitation.  The all-time record for a single day is 1.47 inches, set in April 1988.  The storm did break the record for the most rain ever recorded in August, which averages just over a tenth of an inch of rain for the entire month.

The flash flood washed debris over roads, swept away and buried cars, knocked a water facility offline, damaged buildings, and stranded about a thousand visitors and staff in Death Valley National Park. By the next day, the flood water had mostly receded, and stranded visitors could be escorted out of the park by National Park personnel.

Death Valley sits at 282 feet below sea level.  If it were not for the extremely arid climate there, Death Valley would likely be filled with water.  However, humid air masses traveling east from the Pacific Ocean have to cross four mountain ranges before they reach the desert valley.  Those air masses lose their moisture in the form of rain on the western slopes of the mountain, leaving a dry area, or rain shadow, on the eastern sides.  By the time the air masses reach Death Valley, they are bone dry.  On rare occasions, the lowest spot in the valley fills with water forming a wide, shallow lake, known as Lake Badwater. 

The extreme heat and aridity of Death Valley evaporates the temporary lake quickly, returning the valley to its usual state.  Furnace Creek still holds the record for the highest air temperature ever recorded:  134 degrees Fahrenheit.

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Death Valley Flash Flooding

Photo, posted April 7, 2021, courtesy of Matthew Dillon via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The All-Time Hottest Day | Earth Wise

February 14, 2022 By EarthWise Leave a Comment

Climate change helping set heat records around the world

Last year saw record high temperatures in many places around the world and this year started out with more of the same.  In mid-January, Onslow, a small town in Western Australia, measured a high temperature of 123.3 degrees, tying the all-time highest temperature ever recorded anywhere in the Southern Hemisphere.  The previous reading was also made in Australia back in 1960.

The new temperature record was set just as climate institutions around the world were announcing that the past seven years have been the highest in recorded history.

The list of temperature records set in 2020 and 2021 is a long one.   2020 was the hottest year in recorded history.  July 2021 was the hottest month ever recorded.   The hottest official temperature ever recorded anywhere in the world was 129.9 degrees, occurring in Death Valley, California on both August 16, 2020, and July 9, 2021. 

The hottest temperature ever recorded in the Arctic was 100.4 degrees on June 20, 2020 in Verkhoyansk in Russia’s Sakha Republic.  (Amazingly, that small town also holds the record for the coldest temperature ever recorded in Asia at -90 degrees). 2021 saw an all-time high temperature recorded in Europe, in Syracuse, Sicily, on August 11 at 119.8 degrees. 

Overall, 400 documented weather stations in communities or outposts worldwide established all-time high temperatures in 2021 alone.  The climate we have lived through over the past decades is changing and these changes will have consequences to our way of life.

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Australia hits 123 degrees, tying hottest temperature on record in Southern Hemisphere

Photo, posted January 21, 2013, courtesy of A. Dombrowski via Flickr.

In ogni caso, un proverbio russo comune Informazioni: “Se curi un raffreddore, passa in sette giorni, e se non lo curi, in una settimana”, non è applicabile alla realtà spagnola.

Earth Wise is a production of WAMC Northeast Public Radio.

Super Blooms

September 27, 2017 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2017/09/EW-09-27-17-Super-Blooms.mp3

This past August one of the driest regions on Earth transformed from a barren desert to a sea of colorful flowers.  Heavy rains in Chile’s Atacama Desert caused the phenomenon, locally known as the desierto florido or flowering desert.   These things typically only happen every five to seven years, but the previous super bloom actually took place in 2015.

[Read more…] about Super Blooms

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