Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model

S. Watanabe, T. Takemura, K. Sudo, T. Yokohata, H. Kawase

    Research output: Contribution to journalReview article

    12 Citations (Scopus)

    Abstract

    The historical anthropogenic change in the surface all-sky UV-B (solar ultraviolet: 280-315 nm) radiation through 1850-2005 is evaluated using an Earth system model. Responses of UV-B dose to anthropogenic changes in ozone and aerosols are separately evaluated using a series of historical simulations including/excluding these changes. Increases in these air pollutants cause reductions in UV-B transmittance, which occur gradually/rapidly before/after 1950 in and downwind of industrial and deforestation regions. Furthermore, changes in ozone transport in the lower stratosphere, which is induced by increasing greenhouse gas concentrations, increase ozone concentration in the extratropical upper troposphere and lower stratosphere. These transient changes work to decrease the amount of UV-B reaching the Earth's surface, counteracting the well-known effect increasing UV-B due to stratospheric ozone depletion, which developed rapidly after ca. 1980. As a consequence, the surface UV-B radiation change between 1850 and 2000 is negative in the tropics and NH extratropics and positive in the SH extratropics. Comparing the contributions of ozone and aerosol changes to the UV-B change, the transient change in ozone absorption of UV-B mainly determines the total change in the surface UV-B radiation at most locations. On the other hand, the aerosol direct and indirect effects on UV-B play an equally important role to that of ozone in the NH mid-latitudes and tropics. A typical example is East Asia (25° N-60° N and 120° E-150° E), where the effect of aerosols (ca. 70%) dominates the total UV-B change.

    Original languageEnglish
    Pages (from-to)5249-5257
    Number of pages9
    JournalAtmospheric Chemistry and Physics
    Volume12
    Issue number11
    DOIs
    Publication statusPublished - Jun 25 2012

    Fingerprint

    ozone
    aerosol
    stratosphere
    transmittance
    deforestation
    radiation
    troposphere
    greenhouse gas
    simulation
    effect
    tropics

    All Science Journal Classification (ASJC) codes

    • Atmospheric Science

    Cite this

    Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model. / Watanabe, S.; Takemura, T.; Sudo, K.; Yokohata, T.; Kawase, H.

    In: Atmospheric Chemistry and Physics, Vol. 12, No. 11, 25.06.2012, p. 5249-5257.

    Research output: Contribution to journalReview article

    @article{38fd09a76fb64527ba4f9e6fe93c94a5,
    title = "Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model",
    abstract = "The historical anthropogenic change in the surface all-sky UV-B (solar ultraviolet: 280-315 nm) radiation through 1850-2005 is evaluated using an Earth system model. Responses of UV-B dose to anthropogenic changes in ozone and aerosols are separately evaluated using a series of historical simulations including/excluding these changes. Increases in these air pollutants cause reductions in UV-B transmittance, which occur gradually/rapidly before/after 1950 in and downwind of industrial and deforestation regions. Furthermore, changes in ozone transport in the lower stratosphere, which is induced by increasing greenhouse gas concentrations, increase ozone concentration in the extratropical upper troposphere and lower stratosphere. These transient changes work to decrease the amount of UV-B reaching the Earth's surface, counteracting the well-known effect increasing UV-B due to stratospheric ozone depletion, which developed rapidly after ca. 1980. As a consequence, the surface UV-B radiation change between 1850 and 2000 is negative in the tropics and NH extratropics and positive in the SH extratropics. Comparing the contributions of ozone and aerosol changes to the UV-B change, the transient change in ozone absorption of UV-B mainly determines the total change in the surface UV-B radiation at most locations. On the other hand, the aerosol direct and indirect effects on UV-B play an equally important role to that of ozone in the NH mid-latitudes and tropics. A typical example is East Asia (25° N-60° N and 120° E-150° E), where the effect of aerosols (ca. 70{\%}) dominates the total UV-B change.",
    author = "S. Watanabe and T. Takemura and K. Sudo and T. Yokohata and H. Kawase",
    year = "2012",
    month = "6",
    day = "25",
    doi = "10.5194/acp-12-5249-2012",
    language = "English",
    volume = "12",
    pages = "5249--5257",
    journal = "Atmospheric Chemistry and Physics",
    issn = "1680-7316",
    publisher = "European Geosciences Union",
    number = "11",

    }

    TY - JOUR

    T1 - Anthropogenic changes in the surface all-sky UV-B radiation through 1850-2005 simulated by an Earth system model

    AU - Watanabe, S.

    AU - Takemura, T.

    AU - Sudo, K.

    AU - Yokohata, T.

    AU - Kawase, H.

    PY - 2012/6/25

    Y1 - 2012/6/25

    N2 - The historical anthropogenic change in the surface all-sky UV-B (solar ultraviolet: 280-315 nm) radiation through 1850-2005 is evaluated using an Earth system model. Responses of UV-B dose to anthropogenic changes in ozone and aerosols are separately evaluated using a series of historical simulations including/excluding these changes. Increases in these air pollutants cause reductions in UV-B transmittance, which occur gradually/rapidly before/after 1950 in and downwind of industrial and deforestation regions. Furthermore, changes in ozone transport in the lower stratosphere, which is induced by increasing greenhouse gas concentrations, increase ozone concentration in the extratropical upper troposphere and lower stratosphere. These transient changes work to decrease the amount of UV-B reaching the Earth's surface, counteracting the well-known effect increasing UV-B due to stratospheric ozone depletion, which developed rapidly after ca. 1980. As a consequence, the surface UV-B radiation change between 1850 and 2000 is negative in the tropics and NH extratropics and positive in the SH extratropics. Comparing the contributions of ozone and aerosol changes to the UV-B change, the transient change in ozone absorption of UV-B mainly determines the total change in the surface UV-B radiation at most locations. On the other hand, the aerosol direct and indirect effects on UV-B play an equally important role to that of ozone in the NH mid-latitudes and tropics. A typical example is East Asia (25° N-60° N and 120° E-150° E), where the effect of aerosols (ca. 70%) dominates the total UV-B change.

    AB - The historical anthropogenic change in the surface all-sky UV-B (solar ultraviolet: 280-315 nm) radiation through 1850-2005 is evaluated using an Earth system model. Responses of UV-B dose to anthropogenic changes in ozone and aerosols are separately evaluated using a series of historical simulations including/excluding these changes. Increases in these air pollutants cause reductions in UV-B transmittance, which occur gradually/rapidly before/after 1950 in and downwind of industrial and deforestation regions. Furthermore, changes in ozone transport in the lower stratosphere, which is induced by increasing greenhouse gas concentrations, increase ozone concentration in the extratropical upper troposphere and lower stratosphere. These transient changes work to decrease the amount of UV-B reaching the Earth's surface, counteracting the well-known effect increasing UV-B due to stratospheric ozone depletion, which developed rapidly after ca. 1980. As a consequence, the surface UV-B radiation change between 1850 and 2000 is negative in the tropics and NH extratropics and positive in the SH extratropics. Comparing the contributions of ozone and aerosol changes to the UV-B change, the transient change in ozone absorption of UV-B mainly determines the total change in the surface UV-B radiation at most locations. On the other hand, the aerosol direct and indirect effects on UV-B play an equally important role to that of ozone in the NH mid-latitudes and tropics. A typical example is East Asia (25° N-60° N and 120° E-150° E), where the effect of aerosols (ca. 70%) dominates the total UV-B change.

    UR - http://www.scopus.com/inward/record.url?scp=84862540842&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84862540842&partnerID=8YFLogxK

    U2 - 10.5194/acp-12-5249-2012

    DO - 10.5194/acp-12-5249-2012

    M3 - Review article

    AN - SCOPUS:84862540842

    VL - 12

    SP - 5249

    EP - 5257

    JO - Atmospheric Chemistry and Physics

    JF - Atmospheric Chemistry and Physics

    SN - 1680-7316

    IS - 11

    ER -