Navigation Links
Sink or source? A new model to measure organic carbon in surface waters
Date:3/4/2011

A new carbon model allows scientists to estimate sources and losses of organic carbon in surface waters in the United States. Study results indicate that streams act as both sources and sinks for organic carbon.

"Model estimates help managers and researchers track carbon transport in streams, which is information that is ultimately needed to improve our understanding of the fate of rising carbon dioxide levels in the atmosphere," said Dr. Richard Smith, a USGS hydrologist and coauthor of the study. "The study contributes new information on the role of rivers as sources and sinks for organic carbon at regional and continental scales, for which scientific knowledge is rather limited."

Findings show that in-stream photosynthesis by algae is a major contributor of organic carbon in large rivers of the United States. It is the largest source of organic carbon delivered to coastal waters from the Mississippi-Atchafalaya River Basin and the Pacific Northwest.

Terrestrial sources of carbon, such as from forests and wetlands, are dominant in all other coastal waters, including waters of the North Atlantic, the South Atlantic Gulf, California, the Texas Gulf, and the Great Lakes.

The results also provide estimates of how much of the organic carbon transported in streams is then permanently removed from the water column. The removed carbon is either sequestered in sediments over long time periods or oxidized and returned to the atmosphere as carbon dioxide. The specific fate of the carbon is not quantified in the current model.

Study findings are estimated using a hydrological mass-balance model based on long-term monitoring at 1,125 stream locations and national geospatial information, including a river network of approximately 62,000 reaches and their connecting drainages, land cover, climate, soils, and estimates of the supply of carbon to streams from primary production.


'/>"/>

Contact: Richard Smith
rsmith1@usgs.gov
703-648-6870
United States Geological Survey
Source:Eurekalert

Page: 1

Related biology news :

1. Wood stoves -- a viable home heat source?
2. UofL biostatistician to develop statistical model that could help answer medical questions
3. DOE grant joins climate modeling with local, regional empirical data
4. Study shows rapamycin reverses myocardial defects in mouse model of LEOPARD syndrome
5. Modell Chair in Pediatric Immunology established
6. New model reveals pesticide-free method that takes a bite out of mosquito-borne disease
7. New discoveries improve climate models
8. Mathematical model could help predict and prevent future extinctions
9. Purdue team creates engineered organ model for breast cancer research
10. Go figure: Math model may help researchers with stem cell, cancer therapies
11. Simple, ingenious way to create lab-on-a-chip devices could become a model for teaching and research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
(Date:4/3/2017)... WASHINGTON , April 3, 2017 /PRNewswire-USNewswire/ ... single-cell precision engineering platform, detected a statistically ... cell product prior to treatment and objective ... highlight the potential to predict whether cancer ... prior to treatment, as well as to ...
(Date:3/30/2017)... -- Trends, opportunities and forecast in this market to ... AFIS, iris recognition, facial recognition, hand geometry, vein recognition, ... industry (government and law enforcement, commercial and retail, health ... and by region ( North America , ... , and the Rest of the World) ...
Breaking Biology News(10 mins):
(Date:7/18/2017)... ... , ... Sourcing custom glass or quartz parts can be a daunting task. ... execute your job can take many hours of emails, phone calls and on-line research. ... showcase the company’s capabilities and core custom categories, and enables you to start the ...
(Date:7/18/2017)... ... July 18, 2017 , ... G-CON today announced ... Trademark Office for its Patent Applications 14/858,857 and 13/669,785 both entitled Modular, Self-Contained, ... applications further expand the protection of G-CON’s R&D investments and validate the G-CON ...
(Date:7/18/2017)... ... July 18, 2017 , ... Allotrope Foundation won the 2017 ... of the Allotrope Framework for commercial use. , The Bio-IT World Best Practices ... elevate the critical role of information technology in modern biomedical research, but also ...
(Date:7/17/2017)... ... July 17, 2017 , ... Whitehouse ... testing capabilities to encompass the full series of ISO 80369 standard test procedures. ... for medical device and drug delivery systems. With this recent expansion, Whitehouse Labs ...
Breaking Biology Technology: