Kig også på andre bioaerosoler fx isopren og DMS (dimethylsulfid) - se fx:
Max Planck Society. (2004, February 26). Astonishing Discovery Over The Amazonian Rain Forest. ScienceDaily: Citat: "...An international team of scientists from the Max Planck Institute of Chemistry, Mainz, Germany, the University of Antwerp, Belgium, the Ghent University, Belgium, and the University of São Paulo, Brazil, examined natural aerosols from the Amazonian rain forest, and has found that they contained two previously unknown compounds, which are photooxidation products of isoprene. These compounds are hygroscopic and could impact cloud formation, rainfall and climate...This discovery is a breakthrough because for the first time a link can be demonstrated between isoprene emitted by forest vegetation and formation of water soluble fine particles..."
California Institute of Technology (2009, August 7). Organic Carbon Compounds Emitted By Trees Affect Air Quality. ScienceDaily: Citat: "..."The king emitters are oaks," Wennberg says. "And the isoprene they emit is one of the reasons that the Smoky Mountains appear smoky."..."And isoprene only comes from plants. They make hundreds of millions of tons of this chemical...for reasons that we still do not fully understand."..."
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Dimethylsulfide Emission: Climate Control by Marine Algae? (Released November 2003): Citat: "...DMS has a significant impact on the Earth's climate. Plankton production of DMS and its escape to the atmosphere is believed to be one of the mechanisms by which the biota can regulate the climate..."
Netherlands Organization For Scientific Research (2004, November 24). Plankton Cool The Southern Hemisphere. ScienceDaily: Citat: "...the plankton species in the southern hemisphere produce more DMS than their northern counterparts. Also in the southern hemisphere there is a higher DMS flux from the sea...The effects of the DMS production by plankton are particularly noticeable at a regional level..."
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Penn State (2004, May 6). Missing Chemical Important To Air Pollution Estimates. ScienceDaily: Citat: "..."We think we measured all major components of the hydroxyl radical reactants, but there is something still unaccounted for,” says Brune. "We know that something we cannot identify is reacting with the hydroxyl radicals and we know it is temperature dependent and not light dependent. We just do not know what it is."..."
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Selv potteplanter laver "sjove" gasmolekyler med ukendt effekt:
American Society for Horticultural Science (2009, September 6). Indoor Plants Found To Release Volatile Organic Compounds. ScienceDaily: Citat: "...The study concluded that "while ornamental plants are known to remove certain VOCs, they also emit a variety of VOCs, some of which are known to be biologically active. The longevity of these compounds has not been adequately studied, and the impact of these compounds on humans is unknown."..."
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Planter har haft mange millioner år til at tilpasse sig (og muligvis aktivt at ændre vejret?) - og at træerne kan gøre at grundvandet kan suppleres langt hurtigere:
University of California - Berkeley (2006, January 13). Deep-rooted Plants Have Much Greater Impact On Climate Than Experts Thought. ScienceDaily: Citat: "...The tap roots transfer rainwater from the surface to reservoirs deep underground and redistribute water...increases photosynthesis and the evaporation of water...by 40 percent in the dry season...During the wet season, these plants can store as much as 10 percent of the annual precipitation as deep as 13 meters (43 feet) underground, to be tapped during the dry months...tree roots acting like pipes to allow water to shift around much faster than it could otherwise percolate through the soil..."
24 September 2007, BBC News: Amazonian forest 'more resilient': Citat: "...Although increased photosynthesis in drought conditions might appear counter-intuitive, the group said it could be explained if the trees were still able to access water reserves with deep root systems...The key thing here is that the tree roots access water deeper than is often represented in models...more frequent drought conditions would eventually diminish the deep-water stores, and make the trees suffer..."
University of Arizona (2007, September 26). Amazon Forest Shows Unexpected Resiliency During Drought. ScienceDaily: Citat: "...By contrast, the UA-led team's findings suggest the opposite happens...During the 2005 drought, Amazon forest trees flourished in the sunnier-than-average weather, most likely by tapping water deep in the forest soil...The limit of the forest's resiliency is unknown, Saleska said, adding, "But if you take away enough water for long enough, the trees will die."..."
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University of Leeds. (2012, September 5). Loss of tropical forests reduces rain. ScienceDaily: Citat: "... By combining observational data with predictions of future deforestation, the researchers estimate that destruction of tropical forests would reduce rain across the Amazon basin by up to a fifth (21 per cent) in the dry season by 2050. The study is published today in Nature. ... "Our study implies that deforestation of the Amazon and Congo forests could have catastrophic consequences for the people living thousands of kilometres away in surrounding countries." ... To understand the relationship in detail, they investigated the journey of air masses arriving over different parts of the forest, to see the cumulative amount of leaf cover the air had moved over during the previous ten days, not just the amount of vegetation it was over when it rained. This showed that the more vegetation the air had travelled over, the more moisture it carried and more rain was produced. ..."
