Navigation Links
UA scientists find evidence of Roman period megadrought
Date:11/4/2011

hronologies.

"The medieval period extends roughly from 800 to 1300 A.D.," said Routson. "During that period there was a lot of evidence from previous studies for increased aridity, in particular two major droughts: one in the middle of the 12th century, and one at the end of the 13th century."

"Very few records are long enough to assess the global conditions associated with these two periods of Southwestern aridity," said Routson. "And the available records have uncertainties."

But the chronology from the San Juan bristlecone pines showed something completely new:

"There was another period of increased aridity even earlier," said Routson. "This new record shows that in addition to known droughts from the medieval period, there is also evidence for an earlier megadrought during the second century A.D."

"What we can see from our record is that it was a period of basically 50 consecutive years of below-average growth," said Routson. "And that's within a much broader period that extends from around 124 A.D. to 210 A.D. about a 100-year-long period of dry conditions."

"We're showing that there are multiple extreme drought events that happened during our past in this region," said Routson. "These megadroughts lasted for decades, which is much longer than our current drought. And the climatic events behind these previous dry periods are really similar to what we're experiencing today."

The prolonged drought in the 12th century and the newly discovered event in the second century A.D. may both have been influenced by warmer-than-average Northern Hemisphere temperatures, Routson said: "The limited records indicate there may have been similar La Nina-like background conditions in the tropical Pacific Ocean, which are known to influence modern drought, during the two periods."

Although natural climate variation has led to extended dry periods in the southwestern U.S. in the past, there is reason to believ
'/>"/>

Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. San Diego Zoo scientists establish cell cultures of endangered frog
2. Structure, not scientists to blame for Los Alamos failings
3. Scientists discover new drug candidates for cystic fibrosis and other diseases
4. Gladstone scientists identify protein form linked to Huntingtons disease
5. Scientists chart gene expression in the brain across lifespan
6. Scientists measure dream content for the first time
7. A*STAR scientists first to identify stem cell key to lung regeneration
8. UK scientists come together to help feed the 7 billion
9. Geoscientists find key to why some patients get infections from cardiac implants
10. Scientists determine family tree for most-endangered bird family in the world
11. Philadelphia scientists to be honored with the John Scott Award
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
UA scientists find evidence of Roman period megadrought
(Date:3/20/2015)... 2015 Research and Markets ( ... "India Sensors Market Forecast and Opportunities 2020" ... sensor market is projected to grow at a ... electronics, automotive, industrial and healthcare sectors are the ... In addition, adoption of MEMS technology in sensors ...
(Date:3/19/2015)... OXFORD, Conn. , March 19, 2015  NXT-ID, Inc. ... biometric authentication company focused on the growing mobile commerce market, ... featured in a news clip that aired this week on ... http://www.myfoxdc.com/ ) . In a segment "The Next ... smart wallet ,a new way to pay, and ,a really ...
(Date:3/17/2015)... 2015  MecklerMedia Corporation (OTCQX: MECK) announced its ... robots ever held in New York ... 11-13, 2015 at the Javits Convention Center. ... include: Acorn Product Development; Axis NJ; c-Link Systems; ... Littler; NewBotic Corporation; Neya Systems LLC; Reliabotics; RoboKind; ...
Breaking Biology News(10 mins):India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 2NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 3MecklerMedia's RoboUniverse New York Announces Sponsors and Exhibitors, May 11-13, 2015 2
... are an important food source for fish and other aquatic ... this week in the Proceedings of the National Academy ... diets are supported by material that originates on land in ... to clarifying the role that watershed inputs play in aquatic ...
... BUFFALO, N.Y. -- An innovative, educational computing platform developed ... the cloud (remote, high-capacity, scalable servers) is helping UB ... new level. Soon, high-school and middle-school students will benefit ... by UB faculty members with a $250,000 National Science ...
... and Nanyang Technological University (NTU) are collaborating to enhance ... with oil., If successful, the wider application of the ... companies here to produce distilled water for their industrial ... at Singapore,s Jurong Island, which produce a lot of ...
Cached Biology News:Aquatic food web tied to land 2With cloud computing, the mathematics of evolution may get easier to learn 2With cloud computing, the mathematics of evolution may get easier to learn 3With cloud computing, the mathematics of evolution may get easier to learn 4memsys-NTU partnership to enhance water desalination technology 2
(Date:3/27/2015)... , March 27, 2015  Neogen Corporation (NASDAQ: ... adopted a prearranged trading plan in accordance with Securities ... Chairman and CEO of Neogen Corporation, is a minority ... Corporation common stock. Herbert does not have ... appropriate. The filing is only for a portion of ...
(Date:3/27/2015)... , March 27, 2015  Peter Walter was ... Science for his pioneering work on how proteins are ... of a regulatory mechanism that cells use to handle ... Walter is a professor of biochemistry at the University ... for treating a range of human diseases related to ...
(Date:3/27/2015)... 27, 2015 WuXi PharmaTech (Cayman) Inc. ... capability and technology platform company serving the global ... that an Investigational New Drug (IND) application for ... arthritis has been accepted for review by the ... In September 2012, MedImmune, the global biologics ...
(Date:3/27/2015)... Governor Andrew M. Cuomo today announced ... - the world’s largest business idea competition with $5 ... $1 million, six $500,000 awards and four $250,000 awards. ... compete for prizes that will turn ideas with high ... York region. , "Last year's successful 43North competition ...
Breaking Biology Technology:Neogen CEO adopts 10b5-1 Trading Plan 2German-born cell biologist Peter Walter wins the 2015 Vilcek Prize in Biomedical Science 2German-born cell biologist Peter Walter wins the 2015 Vilcek Prize in Biomedical Science 3Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 2Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 3Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 2Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 3Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 4Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 5
... CLAREMONT, Calif., May 13 /Xinhua-PRNewswire-FirstCall/ --,Kiwa Bio-Tech ... finalization of an agreement establishing a joint ... product., On May 9, General Manager ... Mr. Ruijun Li and his associates visited ...
... - Regulated Information, ThromboGenics NV (Euronext Brussels: ... vascular disease, eye disease and,cancer, is today issuing ... ended,31 March 2008., Prof. Desire Collen, CEO ... "ThromboGenics, clinical development programs,are continuing to make the ...
... Conn., May 13 Biodel Inc. (Nasdaq:,BIOD) today announced ... NASDAQ Biotechnology Index (NBI), effective as of the market,s ... to be included in the NASDAQ Biotechnology Index and,believe ... of its goals," stated Dr. Solomon Steiner, Chairman and ...
Cached Biology Technology:Kiwa Bio-Tech Confirms Joint Venture Agreement With Shijiazhuang Huaxing Animal Medicine Co., Ltd. 2Kiwa Bio-Tech Confirms Joint Venture Agreement With Shijiazhuang Huaxing Animal Medicine Co., Ltd. 3ThromboGenics N.V. - Business Update 2ThromboGenics N.V. - Business Update 3ThromboGenics N.V. - Business Update 4ThromboGenics N.V. - Business Update 5ThromboGenics N.V. - Business Update 6ThromboGenics N.V. - Business Update 7Biodel Inc. Added to NASDAQ Biotechnology Index 2
... Purified Tyrosine Hydroxylase (Ser40) Polyclonal ... raised against synthetic phosphopeptide corresponding ... the phospho-Ser40 of rat Tyrosine ... purified by sequential chromatography on ...
...
Mouse H60 Allophycocyanin MAb (Clone 205326) ENTREZ GeneID: 15101...
Can be used for the quantitative recovery of small amounts of nucleic acids within dilute solutions. 5mg/ml...
Biology Products: