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    Sulfuric acid deposition from stratospheric geoengineering with sulfate aerosols

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    Kravitz_et_al-2009-Journal_of_Geophysical_Research__Atmospheres_(1984_2012).pdf
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    Type
    Article
    Authors
    Kravitz, Ben
    Robock, Alan
    Oman, Luke
    Stenchikov, Georgiy L. cc
    Marquardt, Allison B.
    KAUST Department
    Earth Science and Engineering Program
    Office of the VP
    Physical Science and Engineering (PSE) Division
    Date
    2009-07-28
    Permanent link to this record
    http://hdl.handle.net/10754/552141
    
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    Abstract
    We used a general circulation model of Earth's climate to conduct geoengineering experiments involving stratospheric injection of sulfur dioxide and analyzed the resulting deposition of sulfate. When sulfur dioxide is injected into the tropical or Arctic stratosphere, the main additional surface deposition of sulfate occurs in midlatitude bands, because of strong cross-tropopause flux in the jet stream regions. We used critical load studies to determine the effects of this increase in sulfate deposition on terrestrial ecosystems by assuming the upper limit of hydration of all sulfate aerosols into sulfuric acid. For annual injection of 5 Tg of SO2 into the tropical stratosphere or 3 Tg of SO2 into the Arctic stratosphere, neither the maximum point value of sulfate deposition of approximately 1.5 mEq m−2 a−1 nor the largest additional deposition that would result from geoengineering of approximately 0.05 mEq m−2 a−1 is enough to negatively impact most ecosystems.
    Citation
    Sulfuric acid deposition from stratospheric geoengineering with sulfate aerosols 2009, 114 (D14) Journal of Geophysical Research
    Publisher
    American Geophysical Union (AGU)
    Journal
    Journal of Geophysical Research
    DOI
    10.1029/2009JD011918
    Additional Links
    http://doi.wiley.com/10.1029/2009JD011918
    ae974a485f413a2113503eed53cd6c53
    10.1029/2009JD011918
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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