Stratospheric Relaxation in IMPACT's Radiation Code

Edis, T ; Grant, K ; Cameron-Smith, P

Lawrence Livermore National Laboratory

关键词: Simulation;    Stability;    Ozone;    Relaxation;    Radiations;   

DOI  :  10.2172/900173
RP-ID  :  UCRL-TR-226128
RP-ID  :  W-7405-ENG-48
RP-ID  :  900173

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.