Posted on 07/25/2019 7:12:05 AM PDT by null and void
By less than an hour agoweather.com
(Getty Image)
A dry landscape stands on Navajo Nation lands on June 7, 2019, in the town of Gallup, New Mexico. Rising temperatures associated with global warming have worsened drought conditions on their lands over recent decades leading to a worsening of water access.
At a Glance
The U.S. Southwest experienced a dozen megadroughts from the years 800 to 1600.Scientists say they have pinpointed the cause of medieval megadroughts that stretched for decades at a time, and they warn climate change could soon cause them to return to the American Southwest.
These droughts lasted for decades at a time.
Researchers say they have discovered the cause of those droughts.
Climate change could cause another megadrought soon, they say.
From the 9th through the 16th centuries, the Southwest experienced about a dozen megadroughts. These extreme droughts were caused by a combination of three factors, according to a new study by researchers at Columbia University's Lamont-Doherty Earth Observatory.
Two of the factors were warming sea surface temperatures in the Atlantic Ocean and high radiative forcing, which occurs when the atmosphere traps more energy from the sun than it radiates back into space, according to the study published this week in Science Advances.
The third, and most important factor, was severe and frequent La Niña events, periods when tropical Pacific Ocean temperatures are cooler and storms are pushed toward the Northwest.
Both a warm Atlantic and a cold Pacific change where storms go, Nathan Steiger, the study's lead author, told Vice. They both result in fewer storms going to the Southwest.
(Ghetto Image)
Parched land stands along a dried river on Navajo Nation lands on June 7, 2019, near the town of Thoreau, New Mexico. Rising temperatures associated with global warming have worsened drought conditions on their lands over recent decades leading to a worsening of water access.
On top of having less rainfall because of fewer storms, the radiative forcing caused any moisture that was there to evaporate more quickly.
Beginning in 1600, volcanic eruptions that spewed particles into the atmosphere blocked some of the sun's energy and decreased the effect of radiative forcing, thereby greatly reducing the number of megadroughts.
However, the increased burning of fossil fuels that started with the Industrial Age pumped more carbon dioxide into the atmosphere, which is again trapping the sun's energy.
This makes the Southwest, parts of which have seen ongoing drought for years now, more vulnerable to megadroughts, according to the Earth Institute's State of the Planet blog.
Because you increase the baseline aridity, in the future when you have a big La Niña, or several of them in a row, it could lead to megadroughts in the American West, Steiger said.
Forecasting the effect of climate change on La Niña events remains tricky, the study says. The bigger worry may be "the possibility that radiative forcing could gradually come to dominate the hydroclimate of the Southwest, with the recurrence of megadroughts becoming almost assured."
It was caused by those horrible gas guzzling SUVs back in the year 800.
Same thing caused the 1930 Oklahoma dust bowl. Well, SUVs and central a/c.
Evidently global climate changes are not man created but cyclically result from other NATURAL causes. Shot themselves in the foot bigley
Morons. Cannot even keep their own lies straight. Global warming must mean more El Nino’s according to the Climate Change morons. So that means more rain. West Texas is turning green baby.
Dear ‘scientists’
1. Define the correct temperature range for the planet.
2. Define the correct humidity range for the planet.
3. Define the correct mean sea level for the planet.
4. Define the correct amount of precipitation for the planet.
5. Define the correct makeup of the atmosphere.
6. Define the correct amount of sea ice at the N/S poles.
7. Define/explain past glaciation and subsequent warming without any input from humans.
Waiting patiently for your response.
Just wait and see what happens if Jim Cantore shows up. :-)
That sounds like the era that was called “The Medieval Warming Period,” when the Earth was four degrees warmer than now.
Pseudo Science is Fake Science by PHD’s.
They gave it away with the lede.
“Coming back” means climate change has occurred before.
No shi....er...no Obama, Sherlock.
Those cliff dwellings in Co are ample evidence of climate change, among countless other examples.
And, of course, when you read “Scientists say”, well, just turn away. How many scientists? Do all scientists say this, or just some. Does a majority saying it make it correct? (Check out the reactions to relativity theory way back when.)
Are they on govt grants which will disappear if they say something not “approved” by politicians who’d fail a third grade science test?
And on and on.
Thankfully, a good many folks out there have the common sense to regard this stuff as - liberal tripe.
The tree ring specimen in Arizona from a Redwood shows many hundreds of years of wet and dry.
Climate variations always happening.
Yes, of course recurring droughts are because of climate change - just like the 1100 AD drought that moved the Anasazi out of their homes.
The climate is changing all the time. Why would now be any different?
“Researchers say they have discovered the cause of those droughts.”
Oh, the indians were driving too many SUVs from 800-1600 AD?
Hey dip shit global warming bullshitter analysis loser
Here in California we are drought drought drought drought global warming global warming global warming were all going to die do them doom doom gloom glam glam!
G then what happened?
Wow Zs in 2017 we had incredible rain in all of the reservoirs went from like 15% to 100% Far and the Oreville dam was threatening to fail because of so much water
Then an 18 we had sort of a normal winter and then in 19 we had incredible rain again
Member those mud slides in Santa Barbara? Southern Cal got 160% of their normal rain this winter
Salep if you have a reasonable all liberal global warming enthusiast just asking what causes Ice Ages ?
And furthermore how we get a stop the next one?
Hey dip shit global warming bullshitter analysis loser
Here in California we are drought drought drought drought global warming global warming global warming were all going to die do them doom doom gloom glam glam!
G then what happened?
Wow Zs in 2017 we had incredible rain in all of the reservoirs went from like 15% to 100% Far and the Oreville dam was threatening to fail because of so much water
Then an 18 we had sort of a normal winter and then in 19 we had incredible rain again
Member those mud slides in Santa Barbara? Southern Cal got 160% of their normal rain this winter
Salep if you have a reasonable all liberal global warming enthusiast just asking what causes Ice Ages ?
And furthermore how we get a stop the next one?
Please don’t call me dip shit, nully suffices
Please don’t call me dip shit, nully suffices
According to his bio, “came to Columbia University as a NOAA Climate and Global Change Postdoctoral Fellow”...IOW, he’s supposed to find things changing or lose his subsidy.
Government grants have ruined scientific research, especially that done by universities.
No university will tolerate their staff bluntly refusing a few million to continue a study.
Just check and see how much money Berkeley or NC State or any of the other big universities is receiving in government grants.
The university system is totally corrupt.
Well, this past year in southwest has been an unusually cold and wet year...you may already have won.
In a couple of years they will mimic this guy:
Climate variations always happening.
They will continue to happen for the next thousand years.
Gen 8:22 While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Climate change is not what we have to worry about. It’s the earth remaining.
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