Navigation Links
Urban 'heat island' effect is a small part of global warming; white roofs don't reduce it
Date:10/19/2011

Cities release more heat to the atmosphere than the rural vegetated areas around them, but how much influence these urban "heat islands" have on global warming has been a matter of debate. Now a study by Stanford researchers has quantified the contribution of the heat islands for the first time, showing that it is modest compared with what greenhouse gases contribute to global warming.

"Between 2 and 4 percent of the gross global warming since the Industrial Revolution may be due to urban heat islands," said Mark Z. Jacobson, a professor of civil and environmental engineering who led the study. He and graduate student John Ten Hoeve compare this with the greenhouse gas contribution to gross warming of about 79 percent and the black carbon contribution of about 18 percent.

Black carbon is a component of the soot created by burning fossil fuels and biofuels and is highly efficient at absorbing sunlight, which heats the atmosphere.

Gross global warming is the total amount of warming that has taken place from all sources, mainly greenhouse gases, black carbon particles and heat islands. Net global warming is gross global warming minus the cooling effect of light-colored atmospheric particles that reflect sunlight back into space, which offsets about half of global warming to date. Net, or observed, global warming is what is typically reported in the media.

Responding to skeptics

Jacobson and Ten Hoeve are authors of a paper describing the research that will be published in Journal of Climate. The paper is available online now. The study modeled climate response from 2005 to 2025.

Some global warming skeptics have claimed that the urban heat island effect is so strong that it has been skewing temperature measurements that show that global warming is happening. They have argued that urban areas are a larger contributor to global warming than the greenhouse gases produced by human activity, and th
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Tecnalia does research into plastics and textiles for the main urban pests
2. New CU-Boulder study reveals bacteria from dog feces in outdoor air of urbanized air
3. Urban impacts on phosphorus in streams
4. Re-inventing Americas urban water infrastructure
5. Models show Coho salmon at risk in US urbanizing watersheds
6. Soil samples reveal urban mercury footprints
7. Landscape coefficients prove useful for urban water conservation efforts
8. Dairy manure goes urban
9. Study finds widespread stream biodiversity declines at low levels of urban development
10. UF study finds cats No. 1 predator to urban mockingbird nests
11. UCSB urban ecosystem research featured in leading ecology journal
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... 2014 The Defense Logistics Agency is insourcing its ... counterfeit microcircuits from entering into its supply chain. ... anti-counterfeit initiative dubbed DNA marking. The capability will validate ... throughout the supply chain. The new quality control measures ...
(Date:12/17/2014)... N.C. , Dec. 16, 2014 Valencell, a ... its PerformTek biometric technology to industry leaders such as ... accurate, clinically validated, biometric wearable products. These products will ... in Las Vegas . ...
(Date:12/17/2014)... fundamentally transforming the travel experience and nowhere is this ... decade, ePassports, biometric readers, and secure document scanners have ... via eGates and Automated Passport Control (APC) Kiosks at ... across the globe. According to ...
Breaking Biology News(10 mins):Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2
... women have twice the risk of preterm delivery than ... a new study by the Kaiser Permanente Division of ... University Press,s journal Human Reproduction on behalf ... The study found that pregnant women with symptoms ...
... Palm Vein Authentication Technology Integrates with,Citrix Password ... and,Compliance, SUNNYVALE, Calif., Oct. 22 ... supplier of innovative computer products including,hard disk ... that its PalmSecure LOGONDIRECTOR has been verified ...
... University, along with colleagues from the California Institute of ... other institutions, have unearthed crystalline magnetic fossils of a ... boundary of the Paleocene and Eocene epochs, some 55 ... in the Proceedings of the National Academy of ...
Cached Biology News:Depression during pregnancy can double risk of preterm delivery 2Fujitsu PalmSecure LOGONDIRECTOR Verified as Citrix Ready 2Fujitsu PalmSecure LOGONDIRECTOR Verified as Citrix Ready 3Fujitsu PalmSecure LOGONDIRECTOR Verified as Citrix Ready 4Earlier global warming produced a whole new form of life 2
(Date:1/23/2015)... 2015  Array BioPharma Inc. (NASDAQ: ARRY ) ... with Novartis Pharma AG to acquire worldwide rights to ... development.  This agreement is conditional on the closing of transactions ... 2014, which are expected to close in the first ...
(Date:1/22/2015)... 2015 Shimadzu Scientific Instruments today ... UV-visible spectrophotometer. Offering wavelength scanning from 190 to ... for applications in a variety of industries, including ... user-friendly UV-1280 enables intuitive operation, while the enhanced ...
(Date:1/22/2015)... | RBJ today announces the firm brokered a long-term lease ... leading biopharmaceutical company, at Two Ledgemont Center in ... , president, and Brian Cohen , senior vice president, ... at 95 Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 Protocol Networks ... The growing team of brand-neutral, independent consultants, Protocol Networks ... Rogers explained that over the years, his company has ... Moroso, Town of Plainfield, as well as others. With ...
Breaking Biology Technology:Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 2Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 3Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 4Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 5Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 6Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 7Shimadzu’s New Monitored Single-Beam UV-Vis Spectrophotometer Offers Comprehensive Measurement Options in a Compact Body 2Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Protocol Networks Brings Independent Technology Consulting to the Constitution State 2
... Care at Hahnemann among the Best in the Nation ... it has been granted Magnet(R) recognition by the American Nurses ... the highest levels of recognition a hospital or medical center ... hospitals in the country that have achieved this prestigious distinction. ...
... , , , WALTHAM, Mass., Dec. 16 Decision ... firms for pharmaceutical and healthcare issues, finds that, according ... and Abbott,s briakinumab (both interleukin inhibitors) will capture 22 ... drug market for moderate to severe psoriasis. Among these ...
... Looking ... for! Zap-CHO is a robust CHO cell culture media supplement that improves the growth ... Zap-CHO is an animal free, well defined and consistent recombinant CHO supplement. , ... Fort Collins, CO (PRWEB) ...
Cached Biology Technology:Hahnemann University Hospital Granted Magnet(R) Status 2Hahnemann University Hospital Granted Magnet(R) Status 3In 2012, Stelara and Briakinumab Will Capture 22 Percent of the Biologics Share in the Moderate to Severe Psoriasis Drug Market 2In 2012, Stelara and Briakinumab Will Capture 22 Percent of the Biologics Share in the Moderate to Severe Psoriasis Drug Market 3Online Video of InVitria's Zap-CHO Helps Scientists Maximize CHO Cell Culture Performance 2
The large Dodeca stainer shaking rack holds the staining trays in the large Dodeca stainer....
...
...
... BioLegend, the Quansys Biosciences Q-Plex Array is ... cytokines/chemokines for human, mouse, and rat research. ... fully quantitative ELISA-based test where 4 distinct ... well of a 96-well plate in a ...
Biology Products: