Climate Change Could Revive Medieval Megadroughts in U.S. Southwest
About a dozen megadroughts struck the American Southwest during the 9th through the 15th centuries, but then they mysteriously ceased around the year 1600. What caused this clustering of megadroughts — that is, severe droughts that last for decades — and why do they happen at all?
If scientists can understand why megadroughts happened in the past, it can help us better predict whether, how, and where they might happen in the future. A study published today in Science Advances provides the first comprehensive theory for why there were megadroughts in the American Southwest. The authors found that ocean temperature conditions plus high radiative forcing — when Earth absorbs more sunlight than it radiates back into space — play important roles in triggering megadroughts. The study suggests an increasing risk of future megadroughts in the American Southwest due to climate change.
A drought-damaged ranch in California.
Previously, scientists have studied the individual factors that contribute to megadroughts. In the new study, a team of scientists at Columbia University’s Lamont-Doherty Earth Observatory has looked at how multiple factors from the global climate system work together, and projected that warming climate may bring a new round of megadroughts.
By reconstructing aquatic climate data and sea-surface temperatures from the last 2,000 years, the team found three key factors that led to megadroughts in the American Southwest: radiative forcing, severe and frequent La Niña events — cool tropical Pacific sea surface temperatures that cause changes to global weather events –– and warm conditions in the Atlantic. High radiative forcing appears to have dried out the American Southwest, likely due to an increase in solar activity (which would send more radiation toward us) and a decrease in volcanic activity (which would admit more of it) at the time. The resulting increase in heat would lead to greater evaporation. At the same time, warmer than usual Atlantic sea-surface temperatures combined with very strong and frequent La Niñas decreased precipitation in the already dried-out area. Of these three factors, La Niña conditions were estimated to be more than twice as important in causing the megadroughts.
While the Lamont scientists say they were able to pinpoint the causes of megadroughts in a more complete way than has been done before, they say such events will remain difficult for scientists to predict. There are predictions about future trends in temperatures, aridity, and sea surface temperatures, but future El Niño and La Niña activity remains difficult to simulate. Nevertheless, the researchers conclude that human-driven climate change is stacking the deck towards more megadroughts in the future.
“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,” explained lead author Nathan Steiger, a Lamont-Doherty Earth Observatory hydroclimatologist.
During the time of the medieval megadroughts, increased radiative forcing was caused by natural climate variability. But today we are experiencing increased dryness in many locations around the globe due to human-made forces. Climate change is setting the stage for an increased possibility of megadroughts in the future through greater aridity, say the researchers.
Contacts and sources:
Nicole deRoberts
Earth Institute at Columbia University
Citation: Oceanic and radiative forcing of medieval megadroughts in the American Southwest.
Nathan J. Steiger, Jason E. Smerdon, Benjamin I. Cook, Richard Seager, A. Park Williams, Edward R. Cook. Science Advances, 2019; 5 (7): eaax0087 DOI: 10.1126/sciadv.aax0087
Source: http://www.ineffableisland.com/2019/07/climate-change-could-revive-medieval.html
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Whistler Blowers, Insiders
HAARP man-made weather to create drought and food shortage for Depopulation agenda of Global big boyz. Control the food, control the people.
Agree 100% Bob DD
* * *
ALL ENGINEERED by…IMBECILIC, DERANGED, IN$ANE, RANCID, PUTRIFYING, CRIMINAL$…called…FERAL AGENCIE$
i deny consent
* * *
Government Documents Link Global Warming “Catastrophes” By Advanced MILITARY CLIMATE MODIFICATION TECHNOLOGY
aka; HAARP & CHEMICALS 
by Volubrjotr • 19 Nov 2012
TITLE: “Present and FUTURE PLANS OF FEDERAL AGENCIES IN WEATHER-CLIMATE MODIFICATION”
This set of documents from 1966 reveals a network of GOVERNMENT AGENCIES IN perpetual and SECRET collaboration with each other and the military TO MODIFY the GLO-BAAL CLIMATE.
Created by the ELITI$T 
National Academy of Sciences – decades of an inter-agency culture of secrecy explains why the ISSUE OF COVERT AEROSOL GEOENGINEERING I$ A TABOO TOPIC 
TO BE DEGRADED TO the $TATU$ OF “CON$PIRACY THEORY” BY a matrix of COMPLICIT BUREAUPRAT$ at every opportunity.
This is why your local TV “meteorologist” will rarely make a helpful comment about an unusual $KY FILLED WITH PERSISTENT JET TRAIL$.
TITLE: “The Evolution of a Weather Modification R&D program Into a Military Weapons System”. A 1986 Critique of the 1966 initiative.
This DOCUMENT appears as an ANONYMOUS DRAFT intended as a critique of the US WEATHER MODIFICATION PROGRAM that the
AUTHOR CHARACTERIZES AS…HIJACKED…INTO A MILITARY WEAPONS $Y$TEM. 
*
JULES VERNE WROTE ABOUT…GEOENGINEERING the EARTH’S CLIMATE…IN 1889…IN in a sequel to “From the Earth to the Moon” called “THE PURCHASE OF THE NORTH POLE”.
LARGE TRACTS OF THE ARCTIC…..THEN USED the FAMOUS CANON from……BOOK – “FROM THE EARTH TO THE MOON”…. TO TILT EARTH’S AXIS. 
VERNE WRITE$ that THE BAALTIMORE GUN CLUB PURCHASED….
The GOAL was TO ESTABLISH A TROPICAL PARADISE as…..A PROFITable TOURIST ATTRACTION…at the North Pole while “IMPROVING”
THE entire GLO-BAAL CLIMATE. 
If VERNE correctly PREDICTED that man would travel from the earth to the moon, it should be no surprise that he also predicted that…..
A $MALL GROUP OF influential “MEN” WOULD consider WARMing THE CLIMATE…FOR PROFIT. 
Verne could have been inspired by HARVARD GEOLOGI$T Nathaniel Shaler who PROPOSED DIVERTING WARM ATLANTIC WATER…INTO THE ARCTIC….
…..BACK IN 1877 
– a dozen years before Verne’s “fantastic”story was published.
____________________________________________________
WARMING the ARCTIC WITH LARGE-SCALE GEOENGINEERING PROJECTS HAS BEEN the VI$ION OF INDU$TRIALI$T$ FOR 100 YEARS…AND…STILL IS.
Antarctic Sea Ice Area Expands Setting New Record High — ‘Greatest ever for the date, and the 13th. highest daily value ever measured’
Arctic Ice Expanding At Fastest Rate On Record: Ice Levels Identical To 1980 Levels!
Antarctic Ice Is Growing As Fast As Arctic Ice!
https://politicalvelcraft.org/2012/11/19/government-documents-link-global-warming-catastrophes-by-advanced-military-climate-modification-technology-aka-haarp-chemicals/
* * *
U.S. Naval Research Laboratory Confirms MANIPULATION OF CLIMATE BY TAXPAYERS HAARP Antennas
by Volubrjotr • 8 Mar 2013
https://politicalvelcraft.org/2013/03/08/u-s-naval-research-laboratory-confirms-manipulation-of-climate-by-taxpayers-haarp-antennas/
* * *
All the biggest lies about climate change DEBUNKED in one astonishing interview
Wednesday, May 01, 2019 by: Mike Adams
https://www.naturalnews.com/2019-05-01-all-the-biggest-lies-about-climate-change-and-global-warming-debunked.html
* * *
Global Warming SCAM Born In San Fransisco By ROTH$CHILD Banking Cartel’s Maurice Strong
by Volubrjotr • 20 Jun 2017
https://politicalvelcraft.org/2017/06/20/global-warming-scam-born-in-san-fransisco-by-rothschild-banking-cartels-maurice-strong/
* * *
ROTHSCHILD Climate Report Sauced Up By PSEUDO SCIENTISTS ~ Follow The Money!
by Volubrjotr • 10 May 2014
Father Of Oil For Food And Global Warming HU$TLE
NWO’s MAURICE $TRONG
In 1983, Strong was appointed to the U.N.’s World Commission on Environment and Development, headed by Gro Harlem Brundtland, Vice President of the World Socialist Party.
Investigations into the
UN’s OIL-FOR-FOOD-PROGRAM found that STRONG had endorsed a CHEQUE FOR $988,885 MADE OUT TO M. $TRONG — issued BY A JORDANIAN BANK. The man who gave the cheque, South Korean business man Tongsun Park was convicted in 2006 in a US Federal court of conspiring to BRIBE UN officials.
$TRONG resigned and FLED TO Canada and thence to CHINA where he has been HIDING out ever since.
$TRONG is believed to have sanctuary in China because of his COU$IN, Anne Louise Strong, a Marxist who LIVED WITH MAO T$E TUNG FOR TWO YEARS.
WORLD ENEMY No. 1 _ Maurice Strong
The Architect Of Global Warming Conspiracy: Maurice Strong
Supreme Court Denies United Nation’s Ploy To Teach Climate Warming As Real: First U.N. MUST PROVE SCIENTIFIC CREDIBILITY Of …THEIR GLO-BAAL WARming CLAIM$……BY….Means Of LEGALLY COMPETENT EVIDENCE.
https://politicalvelcraft.org/2014/05/10/rothschild-climate-report-sauced-up-by-pseudo-scientists-follow-the-money/
* * *
U.N. Requests Immunity From Criminal Prosecution For CLIMATE SCIENTISTS ENGAGED IN CONSTRUCTIVE FRAUD
by Volubrjotr • 19 Aug 2012
https://politicalvelcraft.org/2012/08/19/u-n-requests-immunity-from-criminal-prosecution-for-climate-scientists-engaged-in-constructive-fraud/
* * *
Elites Caught Red Handed With The 2009 Emails Defrauding Climate Science For Monetary Gain & Power!
by Volubrjotr • 12 Jan 2013
https://politicalvelcraft.org/2013/01/12/felon-george-soros-and-his-ilk-caught-red-handed-with-prince-charles-defrauding-climate-science-for-monetary-gain-power/
* * *
Weekend Reflections: PILFERING AMERICA’S MONEY By The CLIMATE SCAM: In 1975, Our Government Pushed “The COMING ICE AGE.” WECOME TO the BANKER’$ CON
by Volubrjotr • 17 Dec 2011
https://politicalvelcraft.org/2011/12/17/obama-soros-pilfering-americas-money-by-climate-scam-in-1975-our-government-pushed-the-coming-ice-age/
Usually by August in Texas we have had two months of 100+ heat during the day as of now we have had only one day at 100+ and next week they are predicting temps in the 80′s thats a unusual cold front unheard of here for decades. So I don’t know where all the warming is I guess it effecting the whole rest of the world and missing us cause we’re special. So the truth comes out God loves Texas and hates California and who can blame him.
Oh a Columbia University study. I didn’t read that earlier that explains alot.I’m not saying all Columbia University studies are b.s. but they make the Mad Hatter look normal so big grain of salt taken here.
Well, if the ivory tower eggheads could extricate their heads from one another’s behinds for a bit of fresh air and a peek at the heavens, they might see the major cause of climate change today….
/v3/earthquakes/2018/2648755.html
And if they have seen, but hoarded such knowledge and/or attempted to stifle the sharing of this truth in any way, they have blood on their hands already which must be accounted for….
If a “little knowledge” is a dangerous thing, how dangerous does that make the “movers” and “shakers” of our world to the many they’ve stolen from, hidden from, used and abused?
God Bless’em
Grand Solar Minimum…Plain and simple!