rock weathering co2

The envisioned structure would consist of pumps to convey Pacific Ocean water from (probably) the vicinity of Eureka, to lined retention basins located on the Eastern slope of the Sierra Nevada, and thence released and conveyed by piping as circumstances dictate through spray nozzles arranged on the upwind side of the playas to be so utilized. (Spraying water in the air, duh!). This site uses cookies to assist with navigation, analyse your use of our services, and provide content from third parties. I have sometimnes wondered about an alternative approach to capturing and sequestering CO2, piggy-backing of the fact that we may well need to look at geo-engineering answers down the track. That's why salt mines and potash mines are are found in some places, but not most. Abraham Lerman, Lingling Wu, Fred T. Mackenzie, CO2 and H2SO4 consumption in weathering and material transport to the ocean, and their role in the global carbon balance, Marine Chemistry, 10.1016/j.marchem.2006.04.004, 106, 1-2, (326-350), (2007). Strontium has four stable, naturally occurring isotopes as follows (abundances in brackets): 84Sr (0.56%), 86Sr (9.86%), 87Sr (7.0%) and 88Sr (82.58%). Get weekly and/or daily updates delivered to your inbox. On a year-to-year basis, the process of rock-weathering is a slow one. Globally, limestones and other carbonate-based sedimentary rocks are a phenomenally important carbon sink that is relatively stable in nature: they are estimated to hold over 60 million gigatons of carbon - compared e.g. Weathering is a familiar process to us all. A classic example of an ancient and long-term carbon-sink. Up there wwe have some wonderful resources; CO2, H2O, O2, N2 and energy in the form of sunlight. How much more more CaCO3 would be in solution if precipitation were all abiogenic? As the sediments continue to accumulate, our carbonate-rich layer will be progressively buried under new layers of sediment and in time it will turn into solid rock - limestone. Your feedback will go directly to Science X editors. If it works, it is of course worth the energy, despite the APA's summation of 18 months ago, which is that "Direct Air Capture" is a non-runner. above: primary (left) and secondary (right) copper minerals. (Of which many others of similar saline character can be found) The volume of soils in which it would be mixed, over decades, would be be of no concern. Carbon dioxide and rock weathering: the chemistry, Limitations to the precipitation of calcium carbonate: the Carbonate Compensation Depth, The significance of weathering as a carbon-sink, Deep weathering of rocks: an illustrated example from Mid-Wales, UK, How breaking up minerals affects their weathering-rate: mountain-building as an accelerant, Picking up signals of major weathering episodes in the geological record. From the actual generation, it seems average generation is 22000MW. I've read the "comments policy" , KR, and also have read the "geoengineering" thread. Both build elevated piles of rock that are prone to collapse by the actions of gravity, earthquakes, rainstorms, explosions in the case of volcanoes and frost action in the case of mountain ranges. There is a certitude that the mineralization of CO2 will in fact provide "geologic interval" sequestration. Combine such parameters and the answer to the riddle of why mountain-building may lead to enhanced carbon dioxide drawdown becomes clear. increased rate of rock weathering in response of increased solar forcing, draws down CO2 therfore cooling the planet. Incidentally, the propensity of rok-forming minerals to weathering is roughly as follows, starting at most susceptible and ending with least susceptible (note that there is a continuous compositional series between the sodi and calcic end-members of the plagioclase feldspar group): Biotite (black mica), Plagioclase (sodic). In general, the amount of water that would need to be pumped is far beyond any reasonable amount that could be pumped. What did 1970’s climate science actually say? The salient point intended to be communicated, was that the "power source" for the enterprise can be compared to existing plant used for the same purpose: moving water. Greetings. I manage another large bulletin board, and encounter your "this belongs better elsewhere" notation fairly frequently. Once in the ocean, carbon dioxide gas reacts with water molecules to release hydrogen, making the ocean more acidic. So, since we are possibly going to put 'something' up there any way, why not look at whether we can get that 'something' to do double duty and help with removing CO2 as well as reflecting sunlight. Split that into micro spheres with a diameter of a micron and the total surface area increases by a factor of over 1/2 a million! Aragonite is also precipitated in the oceans - molluscs use it to build their shells and corals their endoskeletons - but it has a much shallower compensation depth which varies from less than 1000m in some low latitudes to over 3000m in the North Atlantic. The chemical weathering process of carbon dioxide in the atmosphere dissolving in rainwater to form carbonic acid, which dissolves rocks and then flows into the oceans, stores around 0.3 billion tons of atmospheric carbon in rivers and in the oceans every year.A new study suggests that this weathering process could play a significant role in future climate change models. You can be assured our editors closely monitor every feedback sent and will take appropriate actions. Apart from any fair dealing for the purpose of private study or research, no A great deal of the information will aid me in updating the Ph.D. That's why weathering of silicates is so important. When they were being worked, mostly between 100 and 200 years ago, tunnels were driven into the ore deposit and the ore was blasted into small fragments for removal. The cube's volume is 10 x 10 x 10 = 1000cm3, so once the saw has done its work, we have a thousand 1cm cubes. That sounds a bit hopeless when compared to the ~30 gigatons emitted by humans burning fossil fuels every year. One way, or the other, it's not a problem. 40% of this increase is directly linked to climate change (higher temperatures and rainfall accelerate mineral dissolution), while the remaining 60% is put down to changing vegetation activity: higher atmospheric CO2 levels reduce evapotranspiration in plants, which intensifies circulation of water in soils. Since you claim at post 24 that 835 MW is 1/3 of the power used in California I am inclined to think you need to check your math much more carefully. In between these extremes, from the bomb-proof to the downright unstable, there exists a whole spectrum of mineral stabilities, but an important point is that most of the numerous mineral species that make up rocks lie towards the stable end of that spectrum: whilst they do react with carbonic acid, they do so at a very slow rate, on geological rather than human timescales. It may be noted that if the power plant was co-located with the pumping plant, near the ocean, that the cooling water for the power plant could be part of the water pumped, thus alleviating the environmental problems related to hot-water discharge. The common primary ore, chalcopyrite, is a sulphide of copper and iron that reacts readily with air and moisture at the surface. ERW liberates base cations, generating Perhaps I’m missing something, but it appears you are speaking of the mass transport of the current, whereas the key point of the above proposal is a function of the surface area . A question about rock weathering and absorbtion of CO2 from the atmosphere. Find some data to support your claim, or withdraw it. 2 by rock weathering holds promise for mitigating climate change Nature. Mountain-building episodes facilitate the creation of a vast supply of fresh-broken rock. The sensitivity of this flux to climate change would then be equivalent to the flux related to the terrestrial biosphere. meanwhile, the following is in response to Michael's observations, It strikes me that it is unrealistic to imagine that 100% of the CO2 that passes the waer jet would be absorbed. Weathering may not, however, take place to any great extent in a high mountain-range like the Himalayas. When your car's exhaust pipe falls apart noisily, it is because the steel from which it was constructed has, over several years, reacted with oxygen and rainwater to form rust.

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