Emission scenario dependencies in climate change assessments of the hydrological cycle

Hideo Shiogama, Naota Hanasaki, Yuji Masutomi, Tatsuya Nagashima, Tomoo Ogura, Kiyoshi Takahashi, Yasuaki Hijioka, Toshihiko Takemura, Toru Nozawa, Seita Emori

    Research output: Contribution to journalLetter

    25 Citations (Scopus)

    Abstract

    Anthropogenic global warming will lead to changes in the global hydrological cycle. The uncertainty in precipitation sensitivity per 1 K of global warming across coupled atmosphere-ocean general circulation models (AOGCMs) has been actively examined. On the other hand, the uncertainty in precipitation sensitivity in different emission scenarios of greenhouse gases (GHGs) and aerosols has received little attention. Here we show a robust emission-scenario dependency (ESD); smaller global precipitation sensitivities occur in higher GHG and aerosol emission scenarios. Although previous studies have applied this ESD to the multi-AOGCM mean, our surprising finding is that current AOGCMs all have the common ESD in the same direction. Different aerosol emissions lead to this ESD. The implications of the ESD of precipitation sensitivity extend far beyond climate analyses. As we show, the ESD potentially propagates into considerable biases in impact assessments of the hydrological cycle via a widely used technique, so-called pattern scaling. Since pattern scaling is essential to conducting parallel analyses across climate, impact, adaptation and mitigation scenarios in the next report from the Intergovernmental Panel on Climate Change, more attention should be paid to the ESD of precipitation sensitivity.

    Original languageEnglish
    Pages (from-to)321-329
    Number of pages9
    JournalClimatic Change
    Volume99
    Issue number1
    DOIs
    Publication statusPublished - Feb 1 2010

    Fingerprint

    hydrological cycle
    climate change
    general circulation model
    aerosol
    atmosphere
    global warming
    ocean
    greenhouse gas
    Intergovernmental Panel on Climate Change
    climate effect
    mitigation

    All Science Journal Classification (ASJC) codes

    • Global and Planetary Change
    • Atmospheric Science

    Cite this

    Shiogama, H., Hanasaki, N., Masutomi, Y., Nagashima, T., Ogura, T., Takahashi, K., ... Emori, S. (2010). Emission scenario dependencies in climate change assessments of the hydrological cycle. Climatic Change, 99(1), 321-329. https://doi.org/10.1007/s10584-009-9765-1

    Emission scenario dependencies in climate change assessments of the hydrological cycle. / Shiogama, Hideo; Hanasaki, Naota; Masutomi, Yuji; Nagashima, Tatsuya; Ogura, Tomoo; Takahashi, Kiyoshi; Hijioka, Yasuaki; Takemura, Toshihiko; Nozawa, Toru; Emori, Seita.

    In: Climatic Change, Vol. 99, No. 1, 01.02.2010, p. 321-329.

    Research output: Contribution to journalLetter

    Shiogama, H, Hanasaki, N, Masutomi, Y, Nagashima, T, Ogura, T, Takahashi, K, Hijioka, Y, Takemura, T, Nozawa, T & Emori, S 2010, 'Emission scenario dependencies in climate change assessments of the hydrological cycle', Climatic Change, vol. 99, no. 1, pp. 321-329. https://doi.org/10.1007/s10584-009-9765-1
    Shiogama H, Hanasaki N, Masutomi Y, Nagashima T, Ogura T, Takahashi K et al. Emission scenario dependencies in climate change assessments of the hydrological cycle. Climatic Change. 2010 Feb 1;99(1):321-329. https://doi.org/10.1007/s10584-009-9765-1
    Shiogama, Hideo ; Hanasaki, Naota ; Masutomi, Yuji ; Nagashima, Tatsuya ; Ogura, Tomoo ; Takahashi, Kiyoshi ; Hijioka, Yasuaki ; Takemura, Toshihiko ; Nozawa, Toru ; Emori, Seita. / Emission scenario dependencies in climate change assessments of the hydrological cycle. In: Climatic Change. 2010 ; Vol. 99, No. 1. pp. 321-329.
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