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:12/19/2014)... Dec. 18, 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ... Monitor: North America Perimeter Security Systems Market" report to ... The North American perimeter security market is estimated to ... Although the U.S. market holds a larger share in this ...
(Date:12/17/2014)... , Dec. 15, 2014 Research and Markets ... "Samsung Galaxy S5 - Home Button Synaptics Fingerprint ... http://photos.prnewswire.com/prnh/20130307/600769 Based ... 5S, Samsung introduces for the first time a fingerprint ...
(Date:12/17/2014)... Valencell, a leader in performance biometric data sensor technology, ... such as Intel, Jabra, Atlas, and Scosche to develop ... products will be showcased at CES 2015, taking place ... "Our partners choose PerformTek biometrics, because ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
(Date:1/22/2015)... January 22, 2015 Shimadzu Scientific ... UV-1280 multipurpose UV-visible spectrophotometer. Offering wavelength scanning from ... is ideal for applications in a variety of ... , The user-friendly UV-1280 enables intuitive operation, while ...
(Date:1/22/2015)... 2015 The laboratory information management systems ... a number of technological advancements due to factors such ... need to integrate healthcare systems, and increasing government support ... system integration. Key players in the market focus on ...
(Date:1/22/2015)... Madison, WI (PRWEB) January 22, 2015 Dr. ... at the 12th annual Scripps Natural Supplements Pre-Conference seminar on ... Supplements Conference is an annual continuing education conference for health ... 15th and included the topic of probiotics in health. Dr. ...
(Date:1/22/2015)...   Cypher Genomics, Inc., the leading genome ... SQNM ), the leading molecular diagnostics company, today ... prenatal tests (NIPT). Through this agreement, Sequenom will ... advance analysis of clinically-relevant fetal sub-chromosomal variants detected ...
Breaking Biology Technology:Shimadzu’s New Monitored Single-Beam UV-Vis Spectrophotometer Offers Comprehensive Measurement Options in a Compact Body 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4
Cached News: