Navigation Links
Climate and drought lessons from ancient Egypt
Date:8/16/2012

Ancient pollen and charcoal preserved in deeply buried sediments in Egypt's Nile Delta document the region's ancient droughts and fires, including a huge drought 4,200 years ago associated with the demise of Egypt's Old Kingdom, the era known as the pyramid-building time.

"Humans have a long history of having to deal with climate change," said Christopher Bernhardt, a researcher with the U.S. Geological Survey. "Along with other research, this study geologically reveals that the evolution of societies is sometimes tied to climate variability at all scales whether decadal or millennial."

Bernhardt conducted this research as part of his Ph.D. at the University of Pennsylvania, along with Benjamin Horton, an associate professor in Penn's Department of Earth and Environmental Science. Jean-Daniel Stanley at the Smithsonian Institution also participated in the study, published in July's edition of Geology.

"Even the mighty builders of the ancient pyramids more than 4,000 years ago fell victim when they were unable to respond to a changing climate," said USGS Director Marcia McNutt. "This study illustrates that water availability was the climate-change Achilles Heel then for Egypt, as it may well be now, for a planet topping seven billion thirsty people."

The researchers used pollen and charcoal preserved in a Nile Delta sediment core dating from 7,000 years ago to the present to help resolve the physical mechanisms underlying critical events in ancient Egyptian history.

They wanted to see if changes in pollen assemblages would reflect ancient Egyptian and Middle East droughts recorded in archaeological and historical records. The researchers also examined the presence and amount of charcoal because fire frequency often increases during times of drought, and fires are recorded as charcoal in the geological record. The scientists suspected that the proportion of wetland pollen would decline during times of drou
'/>"/>

Contact: Catherine Puckett
cpuckett@usgs.gov
352-377-2469
United States Geological Survey
Source:Eurekalert

Page: 1 2

Related biology news :

1. New study will help protect vulnerable birds from impacts of climate change
2. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
3. UNH researchers find African farmers need better climate change data to improve farming practices
4. Fielding questions about climate change
5. Glacier-fed river systems threatened by climate change
6. Beating famine: Sustainable food security through land regeneration in a changing climate
7. Energy requirements make Antarctic fur seal pups vulnerable to climate change
8. Why spring is blooming marvelous (and climate change makes it earlier)
9. Carnegies Greg Asner named Energy/Climate Fellow by US State Department
10. Declines in Caribbean coral reefs pre-date damage resulting from climate change
11. Some corals like it hot: Heat stress may help coral reefs survive climate change
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/18/2015)... , Aug. 17, 2015 Research and ... of the "Global Biometric Authentication & Identification ... Estimation & Forecast, 2015-2020" report to their ... and identification systems market is expected to grow ... to 2020 and generate over $25 billion (approximately) ...
(Date:8/12/2015)... 12, 2015  New research unveiled at Black ... phones to steal users, fingerprints. Information released today ... fingerprint scanners on mobile devices, making the security ... biometrics on mobile devices, HYPR Corp. recently released ... authentication systems with strong cryptographic security. More information ...
(Date:8/10/2015)... The latest 364 page report from ... the global border security market . Visiongain ... 2015. Now: Border security is hard to achieve ... business critical issue you need to know about - and ... analysis of how this will impact your company and the ...
Breaking Biology News(10 mins):Global Biometric Authentication & Identification Market 2015: Focus On Modality, Motility & Application - Estimation & Forecasts to 2020 for the $25 Billion Industry 2HYPR Corp. Addresses Android Vulnerability That Exposes Ecosystem-wide Biometric Security Challenges 2HYPR Corp. Addresses Android Vulnerability That Exposes Ecosystem-wide Biometric Security Challenges 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
... Injecting performance enhancing corticosteroid hormones for other than medical ... injected hormones. Injecting synacthen, which stimulates the body to ... also banned. But until now there has been no ... , That has just changed. Research published this week ...
... have developed a simple "dipstick" test for detecting cocaine ... The test is based upon DNA-gold nanoparticle technology, and ... used for home pregnancy tests. , "Building upon our ... sensors that are based on the lateral flow separation ...
... the open access journal PLoS Biology, Sagiv Shifman, Jonathan Flint, ... mouse genome--one of the most detailed genetic maps now available ... map, they used two groups of mice: one consisting of ... lines (RI). Using the single nucleotide polymorphism (SNP) data that ...
Cached Biology News:Scientists design simple dipstick test for cocaine, other drugs 2Mapping the mouse genome 2
(Date:9/2/2015)... Sep. 02, 2015 ... has announced the addition of Jain PharmaBiotech,s ... and Companies" to their offering. ... technologies besides fluorescence in situ hybridization (FISH), ... Molecular cytogenetics includes application of nanobiotechnology, microarrays, ...
(Date:9/2/2015)... , Sept. 2, 2015 Aytu BioScience, ... developing treatments for urological and related conditions, announced today ... planned private placement convertible note financing, raising a total ... tranches totaling $3.175 million. Josh ... from this private placement are intended to be used ...
(Date:9/2/2015)... ... September 02, 2015 , ... Advancing in medical ... From vital sign monitoring in ICU to 3D skull printing analysis for Neurosurgery, ... real-time clinical decisions with simultaneous access to high precision medical images and electronic ...
(Date:9/1/2015)... 2, 2015 Swecure, ... Forschung und Entwicklung neuartiger Therapien für Störungen ... und Reizdarm konzentriert, erhält vom US Patent ... neues Medikament patentiert wird. Das Medikament basiert ... Kindern verhindert und Entzündungen vorbeugt.   ...
Breaking Biology Technology:Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 2Global Cytogenetics Technologies Study 2015-2025 - Latest Markets and Companies Analysis 3Aytu BioScience Completes $5.175 Million Private Placement 2Aytu BioScience Completes $5.175 Million Private Placement 3Surgical Workstation Powered by 6th Gen. Intel® Core™ Skylake Processors 2Surgical Workstation Powered by 6th Gen. Intel® Core™ Skylake Processors 3Das Patent von Swecure zur Verhinderung von Allergien bei Kindern wird in den USA zugelassen 2
Goat polyclonal to SIAH Interacting Protein ( Abpromise for all tested applications)....
Naked1 Antibody Shipping Temperature: HOT Storage Temperature: -20C...
PKC (pSer345), phospho-specific...
MAB3246 recognizes the neuro-endocrine specific protein (NSP) C....
Biology Products: