HOME >> BIOLOGY >> NEWS
14,000 Years Of Atmospheric Lead Emissions Recorded In Swiss Peat Bog As Published In Science Magazine

Washington DC--It's often thought that humans began modifying our environment over large regions relatively recently, aided and abetted by modern technology. Now, a report by researchers at the University of Berne as well as universities in Liverpool, Kiev, and Copenhagen, helps show that humans have been dramatically altering their surroundings for thousands of years and chronicles the growing effect of humans on atmospheric pollution.

The researchers reconstructed a record of the past showing that human activity has caused lead levels to soar above what they once were naturally, and that this activity began as far back as 6,000 years ago. William Shotyk, of the University of Berne, and his colleagues analyzed changing levels and sources of lead in the atmosphere over the last 14,000 years by studying layers of peat in an ancient bog in Switzerland's Jura Mountains. The data suggest that everyone from the first plant cultivators in Europe, to miners of the Roman Empire, to Medieval silversmiths in Germany, to European petroleum companies in the 1970's, has left their mark on this peat bog by releasing lead or dust containing lead to the air. In the study, which will appear in the 11 September issue of Science, researchers traced natural variations in atmospheric lead and dust associated with the retreat of the large ice sheets from Scandinavia.

While peat bogs and ice cores have been used to analyze atmospheric lead levels for small increments of time and back to several thousand years ago, Shotyk and his colleagues present the first complete record to span approximately 14,000 years--nearly the entire time since the last ice age. They were therefore able to contrast the first 8,000 years of natural lead emissions with the contributions that humans made over the years that followed. To accomplish this task, the researchers took advantage of an unusual characteristic of most peat bogs, namely tha
'"/>

Contact: Diane Dondershine
ddonders@aaas.org
(202) 326-6421
American Association for the Advancement of Science
11-Sep-1998


Page: 1 2 3

Related biology news :

1. Years of research, thought lead geologist to propose new supercontinent Columbia
2. Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia
3. Earliest Modern Tree Lived 360-345 Million Years Ago
4. For First Time In 40 Years National Jewish Researchers Report Chronic Beryllium Disease Caused By Extremely Low Levels Of Exposure
5. TB Is Still Rife Fifty Years After The Study Which Found A Cure
6. Possible Human Ancestors In Spain 780,000 Years Ago
7. Long Lava Flows May Have Taken Years, Causing Global Cooling And Extinctions
8. Fossil Evidence Of Worms Over One Billion Years Old Reported In Science
9. Native Fish Found In U.S. Lake Ontario For First Time In 50 Years
10. Long-Term Study Looks At HIV Positive Men With Few Signs Of Disease Progression, 10-18 Years After Seroconversion
11. Researchers Investigate Years Before Menopause

Post Your Comments:
(Date:2/5/2015)... 2015   Epic Sciences , a precision diagnostics company ... Murali Prahalad , Ph.D., president and CEO, is scheduled ... (PMWC) 2015: Silicon Valley, which is taking place at the ... on January 26-28, 2015. Dr. Prahalad ... Biomarkers." Last year, Epic Sciences was a finalist in the ...
(Date:2/5/2015)... Research and Markets ( http://www.researchandmarkets.com/research/6lngtl/global_biometrics ... "Global Biometrics Market (2014-2020): Market Forecast By Technologies, ... to their offering. , In ... is anticipated to overtake North America ... spending towards IT security, government biometric based projects ...
(Date:1/22/2015)... , Jan. 13, 2015 /PRNewswire/ - Today, FindBiometrics, the leading ... the launch of its new website design. "When ... its infancy", says Peter O,Neill , founder and CEO ... the industry needs involvement from the key players on a ...
Breaking Biology News(10 mins):Epic Sciences to Present at Personalized Medicine World Conference 2015 on the Use of Circulating Tumor Cells as Cancer Biomarkers 2Global Biometrics Market (2014-2020): Market Forecast By Technologies, Applications, End Use, Regions and Countries 2Global Biometrics Market (2014-2020): Market Forecast By Technologies, Applications, End Use, Regions and Countries 3Identity Industry Leading Publication Debuts New Look As Biometrics Hit Mainstream 2
(Date:2/26/2015)... , Feb. 26, 2015  23andMe, the leading ... Kate Black as Privacy Officer and Corporate Counsel. ... state privacy laws as well as health care regulations. ... she will be responsible for reviewing, updating and enhancing ... the U.S. and abroad. She joined the company January ...
(Date:2/26/2015)... 2015 Protiviti ( www.protiviti.com ), a global ... Governance Portal , designed to increase the efficiency ... tasks across multiple business units and projects. The Governance ... better align their controls with the COSO ( Committee ... In response to client feedback, Protiviti has also included ...
(Date:2/26/2015)...  NuGene International, Inc. ("NuGene") (OTCQB: NUGN), the ... hair rejuvenation, has announced that it has selected ... investor relations and strategic communications. ... diversification strategies – and we need to communicate ... Ali Kharazmi CEO of NuGene when announcing this ...
(Date:2/26/2015)... (PRWEB) February 26, 2015 Already well ... gauging line by expanding its Length Gauge offerings with ... gauges. , Specifically, HEIDENHAIN’s pencil probe-style SPECTO ... force specification. Two new 1Vpp, 12mm stroke length ... force applications. One is a variant with a weak ...
Breaking Biology Technology:23andMe Appoints Kate Black as Privacy Officer and Corporate Counsel 2Protiviti Governance Portal Helps Companies Drive Governance, Risk and Compliance Productivity Across Multiple Business Units 2Protiviti Governance Portal Helps Companies Drive Governance, Risk and Compliance Productivity Across Multiple Business Units 3NuGene International, Inc. Selects Capital Market Relations for Strategic Investor Relations 2NuGene International, Inc. Selects Capital Market Relations for Strategic Investor Relations 3Accuracy and Versatile Gauging Go Hand in Hand at HEIDENHAIN 2
Cached News: