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Unexpected growth in atmospheric CO2
October 23, 2007A team of scientists has found that atmospheric carbon dioxide (CO2) growth has increased 35 percent faster than expected since 2000. The findings are published this week in the journal Proceedings of the National Academy of Sciences (PNAS).
The study found that inefficiency in the use of fossil fuels increased levels of CO2 by 17 percent, while the other 18 percent came from the decline in the efficiency of natural land and ocean sinks which soak up CO2 from the atmosphere.
The research by the Global Carbon Project, the University of East Anglia (UEA) and the British Antarctic Survey (BAS) shows that improvements in the carbon intensity of the global economy have stalled since 2000 after improving for 30 years, leading to the unexpected growth of atmospheric CO2.
The study also states that global CO2 emissions were up to 9.9 billion tons of carbon in 2006, 35 percent above emissions in 1990 (used as a reference year in the Kyoto Protocol).
Author Dr Corinne Le Quéré of the University of East Anglia and British Antarctic Survey says, "The decline in global sink efficiency suggests that stabilisation of atmospheric CO2 is even more difficult to achieve than previously thought. We found that nearly half of the decline in the efficiency of the ocean CO2 sink is due to the intensification of the winds in the Southern Ocean".
The study's lead author, Dr Pep Canadell, executive director of the Global Carbon Project, said: "In addition to the growth of global population and wealth, we now know that significant contributions to the growth of atmospheric CO2 arise from the slow-down of natural sinks and the halt to improvements in the carbon intensity of wealth production."
British Antarctic Survey
The study also states that global CO2 emissions were up to 9.9 billion tons of carbon in 2006, 35 percent above emissions in 1990 (used as a reference year in the Kyoto Protocol).
Author Dr Corinne Le Quéré of the University of East Anglia and British Antarctic Survey says, "The decline in global sink efficiency suggests that stabilisation of atmospheric CO2 is even more difficult to achieve than previously thought. We found that nearly half of the decline in the efficiency of the ocean CO2 sink is due to the intensification of the winds in the Southern Ocean".
The study's lead author, Dr Pep Canadell, executive director of the Global Carbon Project, said: "In addition to the growth of global population and wealth, we now know that significant contributions to the growth of atmospheric CO2 arise from the slow-down of natural sinks and the halt to improvements in the carbon intensity of wealth production."
British Antarctic Survey
Atmospheric Co2 Current Events and Atmospheric Co2 News RSS'Green' research at Louisiana Tech results in new geopolymer concrete technology
Dr. Erez Allouche, assistant professor of civil engineering at Louisiana Tech University and associate director of the Trenchless Technology Center, is conducting innovative research on geopolymer concrete and providing ways to use a waste byproduct from coal fired power plants and help curb carbon dioxide emissions.
New CO2 data helps unlock the secrets of Antarctic formation
The link between declining CO2 levels in the earth's atmosphere and the formation of the Antarctic ice caps some 34 million years ago has been confirmed for the first time in a major research study.
Time to tap climate-change-combating potential of the world's ecosystems
Investing in restoration and maintenance of the Earth's multi-trillion dollar ecosystems - from forests and mangroves to wetlands and river basins - can have a key role in countering climate change and climate-proofing vulnerable economies.
Eating less red meat can prevent cancer, heart attacks and global warming
Raising livestock also accounts for around 18% of greenhouse gases. It is therefore possible to act against climate change and reduce cardiovascular and cancer deaths, by cutting the production and consumption of 'red meat' from these animals.
University of Hawaii at Manoa researchers reveal ocean acidification at Station ALOHA
The burning of fossil fuels has released tremendous amounts of the greenhouse gas carbon dioxide (CO2) into the atmosphere, significantly impacting global climate.
Waste water treatment plant mud used as 'green' fuel
Catalan scientists have shown that using mud from waste water treatment plants as a partial alternative fuel can enable cement factories to reduce their CO2 emissions and comply with the Kyoto Protocol, as well as posing no risk to human health and being profitable.
Close relationship between past warming and sea-level rise
In a paper in Nature Geoscience, a team from the National Oceanography Centre, Southampton (NOCS), along with colleagues from Tübingen (Germany) and Bristol presents a novel continuous reconstruction of sea level fluctuations over the last 520 thousand years.
Rising acidity levels could trigger shellfish revenue declines, job losses
Changes in ocean chemistry - a consequence of increased carbon dioxide (CO2) emissions from human industrial activity - could cause U.S. shellfish revenues to drop significantly in the next 50 years, according to a new study by researchers at the Woods Hole Oceanographic Institution (WHOI).
University of Leicester geologists demonstrate extent of ancient ice age
Geologists at the University of Leicester have shown that an ancient Ice Age, once regarded as a brief 'blip', in fact lasted for 30 million years.
Shellfish face an uncertain future in a high CO2 world
Overfishing and disease have decimated shellfish populations in many of the world's temperate estuarine and coastal ecosystems.
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Science Codex Climate And Earth News by Science Codex Science Codex posts articles on the latest science findings from all over the world.Kindle blogs are fully downloaded onto your Kindle so you can read them even when you're not wirelessly connected. And unlike RSS readers which often only provide headlines, blogs on Kindle give you full text content and images, and are updated wirelessly throughout the day. |
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Rising atmospheric CO"2 as a possible trigger for the end-Triassic mass extinction [An article from: Palaeogeography, Palaeoclimatology, Palaeoecology] by T.T. Huynh (Author), C.J. Poulsen (Author) This digital document is a journal article from Palaeogeography, Palaeoclimatology, Palaeoecology, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: The end-Triassic mass extinction, one of the five largest extinctions in Earth history, was a severe catastrophe in which 80% of all species were wiped out. The cause of the extinction is controversial, but any mechanism must account for mass extinction in both marine and terrestrial environments. One smoking gun-the eruption of the Central Atlantic Magmatic Province (CAMP)-has prompted the hypothesis that CO"2 degassing to the atmosphere may have induced an environmental catastrophe... |
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Belowground Responses to Rising Atmospheric CO2: Implications for Plants, Soil Biota, and Ecosystem Processes (Developments in Plant and Soil Sciences) by P.S. Curtis (Editor), G. O'Neill (Editor), James A. Teeri (Editor), Donald R. Zak (Editor), Kurt S. Pregitzer (Editor) As atmospheric CO2 increases there will almost certainly be alterations in soil carbon fluxes. It is likely that such alterations will be accompanied by changes in the partitioning of carbon between organic structures and to soil processes. These changes have the potential for further altering the structure and function of terrestrial ecosystems. While there has been increasing recognition of the importance of soil-mediated responses to global climate change, the nature and magnitude of these responses are not well understood. In an effort to expand our assessment of the significance of belowground responses to rising atmospheric CO2, a workshop has been organized that resulted in the peer-reviewed contributions that are contained in this volume. |
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Reproducibility of Holocene atmospheric CO"2 records based on stomatal frequency [An article from: Quaternary Science Reviews] by F. Wagner (Author), L.L.R. Kouwenberg (Author), T.B. van Hoof (Author), Vissc (Author) This digital document is a journal article from Quaternary Science Reviews, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: The majority of the stomatal frequency-based estimates of CO"2 for the Holocene do not support the widely accepted concept of comparably stable CO"2 concentrations throughout the past 11,500 years. To address the critique that these stomatal frequency variations result from local environmental change or methodological insufficiencies, multiple stomatal frequency records were compared for three climatic key periods during the Holocene, namely the Preboreal oscillation, the 8.2kyr cooling event and the Little... |
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Atmospheric CO"2 concentration effects on N partitioning and fertilizer N recovery in field grown rice (Oryza sativa L.) [An article from: Agriculture, Ecosystems and Environment] by W.M.W. Weerakoon (Author), K.T. Ingram (Author), D.N. Moss (Author) This digital document is a journal article from Agriculture, Ecosystems and Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Lowland rice (Oryza sativa L.) responds positively to increased atmospheric CO"2 concentration. However, the efficiency of the canopy depends on the N status of the plant, which could vary with the change in uptake and partitioning of N with increased atmospheric CO"2. A field experiment was conducted at the International Rice Research Institute (IRRI) to determine changes in N requirement of the rice crop and to propose suitable management strategies to overcome tissue N dilution with increased... |
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Effect of free-air atmospheric CO"2 enrichment on dark respiration of rice plants (Oryza sativa L.) [An article from: Agriculture, Ecosystems and Environment] by Z. Xu (Author), X. Zheng (Author), Y. Wang (Author), Y. Huang (Author), Zhu (Author) This digital document is a journal article from Agriculture, Ecosystems and Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Elevated carbon dioxide (CO"2) has been shown to have variable effects on plant respiration rates in publications. However, there is little measurement of dark respiration rate of rice plant (Oryza sativa L.) conducted in free-air CO"2 enrichment (FACE). In this study, seasonal variation in the effect of elevated CO"2 on dark respiration of aboveground rice was investigated by FACE experiments in Wuxi city, Jiangsu province of China. The results showed that increasing the present atmospheric... |
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Effects of elevated atmospheric CO"2 on root dynamics and productivity of sorghum grown under conventional and conservation agricultural management practices ... Agriculture, Ecosystems and Environment] by S.G. Pritchard (Author), S.A. Prior (Author), H.H. Rogers (Author), M. Davis (Author) This digital document is a journal article from Agriculture, Ecosystems and Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Although it is widely acknowledged that rising atmospheric CO"2 concentrations will increase crop root growth, no study has considered how this response could be influenced by agricultural management practices. Therefore, we examined the influence of elevated atmospheric CO"2 (ambient+360@mmolmol^-^1) on root dynamics of sorghum (Sorghum bicolor) produced under conventional (tillage following winter fallow) and conservation (no-till following clover (Trifolium repens) winter cover crop)... |
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