Aerosol effects on cloud water amounts were successfully simulated by a global cloud-system resolving model

Yousuke Sato, Daisuke Goto, Takuro Michibata, Kentaroh Suzuki, Toshihiko Takemura, Hirofumi Tomita, Teruyuki Nakajima

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Aerosols affect climate by modifying cloud properties through their role as cloud condensation nuclei or ice nuclei, called aerosol-cloud interactions. In most global climate models (GCMs), the aerosol-cloud interactions are represented by empirical parameterisations, in which the mass of cloud liquid water (LWP) is assumed to increase monotonically with increasing aerosol loading. Recent satellite observations, however, have yielded contradictory results: LWP can decrease with increasing aerosol loading. This difference implies that GCMs overestimate the aerosol effect, but the reasons for the difference are not obvious. Here, we reproduce satellite-observed LWP responses using a global simulation with explicit representations of cloud microphysics, instead of the parameterisations. Our analyses reveal that the decrease in LWP originates from the response of evaporation and condensation processes to aerosol perturbations, which are not represented in GCMs. The explicit representation of cloud microphysics in global scale modelling reduces the uncertainty of climate prediction.

Original languageEnglish
Article number985
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

Fingerprint

Aerosols
aerosols
Climate
Water
Climate models
climate models
water
Parameterization
parameterization
climate
Condensation
ice nuclei
Satellites
condensation nuclei
satellite observation
Ice
Uncertainty
Evaporation
condensation
evaporation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Aerosol effects on cloud water amounts were successfully simulated by a global cloud-system resolving model. / Sato, Yousuke; Goto, Daisuke; Michibata, Takuro; Suzuki, Kentaroh; Takemura, Toshihiko; Tomita, Hirofumi; Nakajima, Teruyuki.

In: Nature Communications, Vol. 9, No. 1, 985, 01.12.2018.

Research output: Contribution to journalArticle

Sato, Yousuke ; Goto, Daisuke ; Michibata, Takuro ; Suzuki, Kentaroh ; Takemura, Toshihiko ; Tomita, Hirofumi ; Nakajima, Teruyuki. / Aerosol effects on cloud water amounts were successfully simulated by a global cloud-system resolving model. In: Nature Communications. 2018 ; Vol. 9, No. 1.
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