Tag Archives: carbon dioxide

Arctic Microbes Convert Dissolved Organic Carbon to CO2

Collin P. Ward, Sarah G. Nalven, Byron C. Crump, George W. Kling, Rose M. Cory. Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration. Nature Communications 8, Article number: 772 (2017) doi:10.1038/s41467-017-00759-2

In sunlit waters, photochemical alteration of dissolved organic carbon (DOC) impacts the microbial respiration of DOC to CO2. This coupled photochemical and biological degradation of DOC is especially critical for carbon budgets in the Arctic, where thawing permafrost soils increase opportunities for DOC oxidation to CO2 in surface waters, thereby reinforcing global warming. Here we show how and why sunlight exposure impacts microbial respiration of DOC draining permafrost soils. Sunlight significantly increases or decreases microbial respiration of DOC depending on whether photo-alteration produces or removes molecules that native microbial communities used prior to light exposure. Using high-resolution chemical and microbial approaches, we show that rates of DOC processing by microbes are likely governed by a combination of the abundance and lability of DOC exported from land to water and produced by photochemical processes, and the capacity and timescale that microbial communities have to adapt to metabolize photo-altered DOC.

EPA CO2 Endangerment Finding Incorrect, Unsupported

Regardless of what anyone thinks about CO2, I’ve argued in the past that the EPA endangerment finding was unsupported and not based on the best available peer-reviewed science at that time. If the legal requirements of the SDWA applied here this finding should have been thrown out.

“The Obama EPA’s infamous “Endangerment Finding” declared that carbon dioxide and methane from fossil fuel operations cause global warming and climate change that pose imminent dangers to the health and wellbeing of every American. In this insightful article, climate history author Dennis Avery explains why this finding is based on bad science and should not be the basis for bureaucratic regulations or court decisions.” click here

Carbon Dioxide Fertilizing Vegetation Growth Globally

Zaichun Zhu, Shilong Piao, Ranga B. Myneni, Mengtian Huang, Zhenzhong Zeng Joseph G. Canadell, Philippe Ciais, Stephen Sitch, Pierre Friedlingstein, Almut Arneth, Chunxiang Cao, Lei Cheng, Etsushi Kato, Charles Koven, Yue Li,
Xu Lian, Yongwen Liu, Ronggao Liu, Jiafu Mao, Yaozhong Pan, Shushi Peng, Josep Peñuelas, Benjamin Poulter, Thomas A. M. Pugh, Benjamin D. Stocker, Nicolas Viovy, Xuhui Wang, Yingping WangZhiqiang Xiao, Hui Yang, Sönke Zaehle and Ning Zeng. Greening of the Earth and its drivers. Nature Climate Change. 6:791-796. August 2016.

Global environmental change is rapidly altering the dynamics of terrestrial vegetation, with consequences for the functioning of the Earth system and provision of ecosystem servicesYet how global vegetation is responding to the changing environment is not well established. Here we use three long-term satellite leaf area index (LAI) records and ten global ecosystem models to investigate four key drivers of LAI trends during 19822009. We show a persistent and widespread increase of growing season integrated LAI (greening) over 25% to 50% of the global vegetated area, whereas less than 4% of the globe shows decreasing LAI (browning). Factorial simulations with multiple global ecosystem models suggest that CO2 fertilization effects explain 70% of the observed greening trend, followed by nitrogen deposition (9%), climate change (8%) and land cover change (LCC) (4%). COfertilization effects explain most of the greening trends
in the tropics, whereas climate change resulted in greening of the high latitudes and the Tibetan Plateau. LCC contributed most to the regional greening observed in southeast China and the eastern United States. The regional effects of unexplained factors suggest that the next generation of ecosystem models will need to explore the impacts of forest demographydifferences in regional management intensities for cropland and pastures, and other emerging productivity constraints such as phosphorus availability.

Carbon Dioxide Emissions to Increase Under Paris Agreement

“China, the world’s largest CO2 emitter, is planning to double its yearly emissions, by an extra 10.9 billion tons. India, the third largest emitter, will treble its emissions, adding 4.9 billion tons, All the other major “developing” nations, plus Japan and Russia, are equally planning to build more coal-fired power stations.So 13 of the countries which signed that G20 communiqué last week, intend to contribute to what the INDCs show will within 13 years be a 46 percent rise in global emissions.” click here for WUWT

The Manipulation of IPCC Climate Science

“The story of how Maurice Strong and the Club of Rome set up the United Nations Environment Program (UNEP), the United Nations Framework Convention on Climate Change (UNFCCC) and the Intergovernmental Panel on Climate Change (IPCC) to direct political and scientific focus on CO2 to ‘prove’ it was causing global warming is well documented. If you want a detailed account read my book, The Deliberate Corruption of Climate Science or a simpler, abbreviated version for the non-scientist titled Human Caused Global Warming: The Biggest Deception in History. The books are unique because they integrate how the science was created to achieve the political agenda. Focus on the bad science was necessary, but once demonstrated, demands an explanation of the motive.” click here for a more in depth discussion at WUWT

 

The Increase in Atmospheric Carbon Dioxide is not Due to Human Activity

“This is a key issue: whether humans are responsible for all or most of the increase in atmospheric CO2. If they are not then it does not matter if alarmists believe that CO2 is the dominant greenhouse gas, which it is not because the increase is natural. Human CO2 is a very small % of the total CO2 going into the atmosphere, The % of human CO2 going into the atmosphere is shown by Figure 7.3, AR4, 3.67% (218.2 GT divided by 8 GT):click here

Carbon Dioxide is Not a Poison, Not a Pollutant

Articles such as this (click here) are simply nonsense. Carbon dioxide is not a pollutant.