Navigation Links
NOAA takes first broad look at soot from ships
Date:7/9/2008

Tugboats puff out more soot for the amount of fuel used than other commercial vessels, and large cargo ships emit more than twice as much soot as previously estimated, according to the first extensive study of commercial vessel soot emissions. Scientists from NOAA and the University of Colorado conducted the study and present their findings in the July 11 issue of the journal Geophysical Research Letters.

The primary sources of soot, or small particles of black carbon, are fossil fuel combustion, wildfires, and burning vegetation for agricultural purposes. In the Arctic, an increase in soot may contribute to climate change if shipping routes expand, according to the study.

"Commercial shipping emissions have been one of the least studied areas of all combustion emissions," said lead author Daniel Lack, of NOAA's Earth System Research Laboratory (ESRL) and the NOAA-CU Cooperative Institute for Research in Environmental Sciences. "The two previous studies of soot emissions examined a total of three ships. We reviewed plumes from 96 different vessels."

Lack and his colleagues observed emission plumes from commercial vessels in open ocean waters, channels, and ports along the southeast United States and Texas during the summer of 2006. From the NOAA research vessel, Ronald H. Brown, the team measured black carbon emitted by tankers, cargo and container ships, large fishing boats, tug boats, and ferries, many of them in the Houston Ship Channel.

Commercial shipping releases roughly 130,000 metric tons of soot per year, or 1.7 percent of the global totalmuch of it near highly populated coastlines, the authors estimate. In the coming years global shipping is expected to grow two to six percent annually.

Tugs emit nearly a gram of soot per kilogram of fuel burnedtwice as much as any other vessel type, the authors found. The high levels point to their low-quality fuela thick, black tar left over from crude oil after the gasoline and kerosene have been removed. Engine age and maintenance also play a role. Tugboats have a disproportionate impact on air quality because they travel within ports, emitting potentially harmful particles near populous urban areas, according to the authors.

"Tugboats are a huge source of black carbon that may be under-reported or not reported at all in emissions inventories compiled by ports," said Lack.

Oceangoing tankers and container ships emit half a gram per kilogram of fuel burned when at dock and slightly less when traveling, according to the study. That's more than twice as much as previously estimated.

A 2007 study by American and German scientists linked particle pollution from shipping to tens of thousands of premature deaths each year, most of them along coastlines in Europe, East Asia, and South Asia. Soot makes up a quarter of that pollution, said Lack.

On a global scale, soot currently traps about 30 percent as much heat as does carbon dioxide, the most important greenhouse gas, according to the latest assessment of the Intergovernmental Panel on Climate Change. The small dark particles absorb sunlight, create haze, and affect how clouds form and make rain, further altering a region's heat balance, according to the new NOAA study. If commercial shipping extends new routes through Arctic waters as they become navigable, soot emissions there could increase.


'/>"/>

Contact: Anatta
anatta@noaa.gov
303-591-2530
NOAA Headquarters
Source:Eurekalert

Related biology news :

1. Buckminster Fuller takes on big coal
2. EuroDYNA takes lid off the genome
3. Researchers discover critical detail of cellular defense against genetic mistakes
4. Frog study takes leaf out of natures book
5. Human embryonic stem cells developed from 4-cell embryo; world first may lessen ethical concerns
6. The first autism disease genes
7. Synthetic molecules emulate enzyme behavior for the first time
8. First-ever symposium brings together military and civilian medical experts
9. Manchester clears first hurdle in €170 million biobank building boom
10. Queens University launches UKs first Center of Excellence for Public Health
11. First successful reverse vasectomy on endangered species performed at the National Zoo
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2016)... -- http://www.apimages.com ) - --> http://www.apimages.com ) ... AP Images ( http://www.apimages.com ) - Germany ... the new refugee identity cards. DERMALOG will be unveiling this device, ... Hanover next week.   --> Germany ... produce the new refugee identity cards. DERMALOG will be unveiling this ...
(Date:3/10/2016)... --> --> ... and Access Management Market by Component (Provisioning, Directory Services, ... Organization Size, by Deployment, by Vertical, and by Region ... market is estimated to grow from USD 7.20 Billion ... a Compound Annual Growth Rate (CAGR) of 12.2% during ...
(Date:3/9/2016)... This BCC Research report provides an overview ... Sequencing (RNA Seq) market for the years 2015, 2016 ... reagents, data analysis, and services. Use this ... market such as RNA-Sequencing tools and reagents, RNA-Sequencing data ... each segment and forecast their market growth, future trends ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... San Diego, CA (PRWEB) , ... May 26, ... ... assay development and manufacturing company, today announced several positive developments that position the ... As a result of the transaction, Craig F. Kinghorn has been appointed ...
(Date:5/25/2016)... , ... May 25, 2016 , ... ... a Thai delegation at BIO 2016 in San Francisco. Located at booth number ... be available to answer questions and discuss the Thai biotechnology and life sciences ...
(Date:5/25/2016)... Md. (PRWEB) , ... May 25, 2016 , ... ... request for information (RFI) issued by the Office of the National Coordinator for ... patient experience, and determines if clinically relevant data were available when and where ...
(Date:5/25/2016)... ... May 25, 2016 , ... Lady had been battling arthritis since the ... in her left knee. Lady’s owner Hannah sought the help of Dr Jeff Christiansen ... to repair her cruciate ligament and help with the pain of Lady’s arthritis. Dr ...
Breaking Biology Technology: