Stratospheric Relaxation in IMPACT's Radiation Code | Zendy

T Edis | Zendy; K. E. Grant | Zendy; Philip CameronSmith | Zendy

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Stratospheric Relaxation in IMPACT's Radiation Code

Author(s) -

T Edis,

K. E. Grant,

Philip CameronSmith

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/900173

Subject(s) - stratosphere , forcing (mathematics) , ozone layer , relaxation (psychology) , environmental science , radiation , atmospheric sciences , stability (learning theory) , work (physics) , climatology , meteorology , computational physics , ozone , physics , optics , computer science , geology , thermodynamics , psychology , social psychology , machine learning

While Impact incorporates diagnostic radiation routines from our work in previous years, it has not previously included the stratospheric relaxation required for forcing calculations. We have now implemented the necessary changes for stratospheric relaxation, tested its stability, and compared the results with stratosphere temperatures obtained from CAM3 met data. The relaxation results in stable temperature profiles in the stratosphere, which is encouraging for use in forcing calculations. It does, however, produce a cooling bias when compared to CAM3, which appears to be due to differences in radiation calculations rather than the interactive treatment of ozone. The cause of this bias is unclear as yet, but seems to be systematic and hence cancels out when differences are taken relative to a control simulation

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