Navigation Links
Irrigation's impacts on global carbon uptake
Date:8/25/2011

MADISON - Globally, irrigation increases agricultural productivity by an amount roughly equivalent to the entire agricultural output of the U.S., according to a new University of Wisconsin-Madison study.

That adds up to a sizeable impact on carbon uptake from the atmosphere. It also means that water shortages - already forecasted to be a big problem as the world warms - could contribute to yet more warming through a positive feedback loop.

The new research quantified irrigation's contribution to global agricultural productivity for the years 1998-2002, estimating the amount of carbon uptake enabled by relieving water stress on croplands. The results published August 25 in the journal Global Biogeochemical Cycles, a publication of the American Geophysical Union.

"If you add up all the annual productivity that comes solely due to irrigation, it adds up to about 0.4 petagrams of carbon, nearly equivalent to the total agricultural productivity of the United States," says study author Mutlu Ozdogan, a UW-Madison professor of forest and wildlife ecology and member of the Nelson Institute for Environmental Studies.

The study also shows quantitatively that irrigation increases productivity in a nonlinear fashion - in other words, adding even a small amount of water to a dry area can have a bigger impact than a larger amount of water in a wetter region. "More irrigation doesn't necessarily mean more productivity," Ozdogan says. "There are diminishing returns."

This was already known on the field scale, he says, but is true globally as well. Interestingly, he found that, on average, worldwide irrigation is currently conducted close to the optimal level that maximizes gains. While this may be good news for current farmers, it implies limited potential for irrigation to boost future productivity even as food demands increase.

The study takes an i
'/>"/>

Contact: Mutlu Ozdogan
ozdogan@wisc.edu
608-890-0336
University of Wisconsin-Madison
Source:Eurekalert

Page: 1 2

Related biology news :

1. Genomewide mapping reveals developmental and environmental impacts
2. Urban impacts on phosphorus in streams
3. Cruise to investigate impacts of ocean acidification
4. Tiny bubbles signal severe impacts to coral reefs worldwide
5. First analysis of invasive plant impacts worldwide
6. US farmers dodge the impacts of global warming -- at least for now
7. Seafloor recovery from fishing gear impacts in Stellwagen Bank Marine Sanctuary slow, unstable
8. Gulf oil spill similar to Exxon Valdez in initial social and mental impacts, study finds
9. Latest report on North American industrial pollution reveals impacts on our shared water environment
10. Epidemiological tree study shows impacts of climate change on forests
11. Human impacts on the marine ecosystems of Antarctica
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/22/2014)... able to purchase fuel cell cars from Toyota and ... the cars will run on hydrogen made from natural ... , Now scientists at Stanford University have developed a ... to produce hydrogen by water electrolysis. The battery ... liquid water into hydrogen and oxygen gas. Unlike other ...
(Date:8/21/2014)... Ind. -- A new study of American singles ... men have the highest orgasm rates. On average, ... with their sexual orientation making little difference. For ... average, women experience orgasm 62.9 percent of the ... and this pattern varies with women,s sexual orientation, ...
(Date:8/21/2014)... dandruff, eczema and other itchy, flaky maladies in humans ... Hawaiian coral reefs and the extreme environments of arctic ... the scientific journal PLOS Pathogens considers the ... genus Malassezia in light of new insights ... world. , University of Hawai,i at Mānoa scientist Anthony ...
Breaking Biology News(10 mins):Stanford scientists develop a water splitter that runs on an ordinary AAA battery 2Stanford scientists develop a water splitter that runs on an ordinary AAA battery 3Orgasm rates for single women less predictable than men's, vary by sexual orientation 2Orgasm rates for single women less predictable than men's, vary by sexual orientation 3Orgasm rates for single women less predictable than men's, vary by sexual orientation 4From dandruff to deep sea vents, an ecologically hyper-diverse fungus 2
... University of Colorado Boulder and the University of California, ... cells known as mitochondria has implications for better understanding ... to mitochondrial defects. Led by CU-Boulder Assistant Professor ... UC-Davis team led by Professor Jodi Nunnari, the researchers ...
... Cape of South Africa can be found small plants in ... are sunbirds, small colourful birds like the African version of ... so pollinate them. New research to be published early next ... Annals of Botany ( http://j.mp/pRSzzC ) by De ...
... . The good chemical and ecological status of water ... to be attained in Germany by 2015. This is the conclusion ... in northern Germany - the Elbe, Weser, Aller and Ems - ... the University of Koblenz-Landau, the Helmholtz Centre for Environmental Research - ...
Cached Biology News:New cellular surprise may help scientists better understand human mitochondrial diseases 2Bird pollinated plant mixes it up when it comes to sex 2Bird pollinated plant mixes it up when it comes to sex 3Poor outlook for water quality in Germany 2
(Date:8/21/2014)... 2014 Deep Research Report ... professional and in-depth research report on the ... Seaweed Fertilizer information, including Seaweed Fertilizer definition, ... well as industry overview. This research covers ... as well as global industry analysis covering ...
(Date:8/21/2014)... (PRWEB) August 21, 2014 The College ... first private college in the Mid-Hudson Region to be ... now begin accepting applications from qualified “high-technology” businesses that ... are very pleased to have been selected for the ... Cuomo’s transformative initiative to stimulate economic development in New ...
(Date:8/21/2014)... HONG KONG , Aug. 21, 2014  China Cord ... today announced its plan to release financial results for ... August 28, 2014, after market close in the US.  ... call at 8:00 a.m. ET on Friday, August 29, ... brief overview of the Company,s recent developments, followed by ...
(Date:8/21/2014)... MO (PRWEB) August 21, 2014 ... service biopharmaceutical contract development and manufacturing organization (CMO) ... Progenics Pharmaceuticals, Inc., an oncology company focused on ... treating cancer, to manufacture the anti-prostate specific membrane ... ADC product candidate. Under the agreement the ...
Breaking Biology Technology:Internationals Seaweed Fertilizer Industry 2014 Development Trend Analysis in New Research Study at DeepResearchReports.com 2Internationals Seaweed Fertilizer Industry 2014 Development Trend Analysis in New Research Study at DeepResearchReports.com 3The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 2The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 3China Cord Blood Corporation to Report First Quarter of Fiscal 2015 Financial Results 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 3
... United States Department of Energy will invest up to ... Centers, including $125 million for a center led by the ... cellulosic ethanol. , ,The Madison bioenergy research facility , ... Center, will operate in collaboration with Michigan State University ...
... In the age of digital everything, print still captures the ... of everything Internet. , ,There's no clearer example than ... when the company was no more than a brief ... on a windy afternoon and Eileen unwound a vision for ...
... Adelante, Atras!* (For a translation, scroll to the end). The ... buyers alike modifying their steps as the Internet changes everything. ... us have adopted at least some of these changes (both ... information, communicate, interact with each other, or buy and sell ...
Cached Biology Technology:UW-Madison to receive $125M for bioenergy research center 2UW-Madison to receive $125M for bioenergy research center 3Blurb shows that print still captures imaginations 2Blurb shows that print still captures imaginations 3Online retailing "tango" is adding some steps 2Online retailing "tango" is adding some steps 3Online retailing "tango" is adding some steps 4Online retailing "tango" is adding some steps 5Online retailing "tango" is adding some steps 6