Navigation Links
Stanford scientists help shed light on key component of China's pollution problem
Date:2/26/2013

It's no secret that China is faced with some of the world's worst pollution. Until now, however, information on the magnitude, scope and impacts of a major contributor to that pollution human-caused nitrogen emissions was lacking.

A new study co-authored by Stanford biology professor and Stanford Woods Institute senior fellow Peter Vitousek reveals that amounts of nitrogen (from industry, cars and fertilizer) deposited on land and water in China by way of rain, dust and other carriers increased by 60 percent annually from the 1980s to the 2000s, with profound consequences for the country's people and ecosystems.

Xuejun Liu and Fusuo Zhang at China Agricultural University in Beijing led the study, which is part of an ongoing collaboration with Stanford aimed at reducing agricultural nutrient pollution while increasing food production in China a collaboration that includes Vitousek and Pamela Matson, dean of Stanford's School of Earth Sciences and a Stanford Woods Institute senior fellow.

The researchers analyzed all available data on bulk nitrogen deposition from monitoring sites throughout China from 1980 to 2010.

During the past 30 years, China has become by far the largest creator and emitter of nitrogen globally. The country's use of nitrogen as a fertilizer increased about threefold from the 1980s to 2000s, while livestock numbers and coal combustion increased about fourfold, and the number of automobiles about twentyfold (all of these activities release reactive nitrogen into the environment).

Increased levels of nitrogen have led to a range of deleterious impacts including decreased air quality, acidification of soil and water, increased greenhouse gas concentrations and reduced biological diversity.

"All these changes can be linked to a common driving factor: strong economic growth, which has led to continuous increases in agricultural and non-agricultural reactive nitrogen emissions and consequently increased nitrogen deposition," the study's authors write.

Researchers found highly significant increases in bulk nitrogen deposition since the 1980s in China's industrialized North, Southeast and Southwest. Nitrogen levels on the North China Plain are much higher than those observed in any region in the United States and are comparable to the maximum values observed in the United Kingdom and the Netherlands when nitrogen deposition was at its peak in the 1980s.

China's rapid industrialization and agricultural expansion have led to continuous increases in nitrogen emissions and nitrogen deposition. China's production and use of nitrogen-based fertilizers is greater than that of the United States and the European Union combined. Because of inefficiencies, more than half of that fertilizer is lost to the environment in gaseous or dissolved forms.

China's nitrogen deposition problem could be brought under control, the study's authors state, if the country's environmental policy focused on improving efficiency in agricultural use of nitrogen and reducing nitrogen emissions from all sources, including industry and transit.


'/>"/>
Contact: Peter Vitousek
vitousek@stanford.edu
650-725-1866
Stanford University
Source:Eurekalert

Related biology news :

1. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
2. Keck award enables Carnegie Mellon and Stanford to dramatically expand crowdsourced RNA design
3. Climate change may create price volatility in the corn market, say Stanford and Purdue researchers
4. Stanford and MIT scientists win Perl-UNC Neuroscience prize
5. Americas clean energy policies need a reality check, say Stanford researchers
6. Support for climate change action drops, Stanford poll finds
7. Stanford scientists document fragile land-sea ecological chain
8. Stanford researchers help predict the oceans of the future with a mini-lab
9. Stanford marine biologist Barbara Block wins Rolex Award for Enterprise
10. Stanford scientists find molecule to starve lung cancer and improve ventilator recovery
11. Stanford researchers calculate global health impacts of the Fukushima nuclear disaster
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/27/2017)... WASHINGTON , Feb. 27, 2017   Strategic ... fund, today announced it has led a $3.5 million investment ... collaboration platform. Strategic Cyber Ventures is DC based and ... and Hank Thomas . Ron Gula , ... Tech Ventures, also participated in this series A round ...
(Date:2/24/2017)...  EyeLock LLC, a leader of iris-based identity ... biometric solution on the latest Qualcomm® Snapdragon™ 835 ... World Congress 2017 (February 27 – March ... 3, Stand 3E10. The Snapdragon ... platform—a combination of hardware, software and biometrics ...
(Date:2/21/2017)... and PORTLAND, Ore. , ... and the Avamere Family of Companies (Avamere Health Services, ... announced a six-month research study that will apply the ... eldercare at senior living and health centers. By analyzing ... hopes to gain insights into physical and environmental conditions, ...
Breaking Biology News(10 mins):
(Date:3/27/2017)...  Perthera,s Chief Bioinformatics Officer and research faculty member ... Ph.D., will be speaking at the American Medical Informatics ... 27, 2017, she will be speaking on the topic ... and Care" (from 10:30 a.m. – 12:00 p.m. PST) ... a participant in the "Making Precision Oncology Data More ...
(Date:3/27/2017)... 2017 DarioHealth Corp. (NASDAQ: DRIO), a leading ... data solutions, today announced that it is now offering ... U.S. consumers who want to have their DarioHealth products ... strategic alliance agreements with partners across the U.S. who ... if approved, will supply and bill the customer,s insurance ...
(Date:3/24/2017)... -- Sinovac Biotech Ltd. ("Sinovac" or the "Company") (NASDAQ: SVA), a ... today announced that its board of directors has amended its shareholder ... March 27, 2017 to March 27, 2018. The amendment was not in ... Ltd. ... Sinovac Biotech Ltd. is a China -based biopharmaceutical ...
(Date:3/23/2017)... San Diego, Calif. (PRWEB) , ... March 23, 2017 , ... Lajollacooks4u is proud to ... in 2008, it has hosted corporate cooking challenges for companies around the world, such as ... , Part of the reason for its increasing popularity is due to its new ...
Breaking Biology Technology: