State of the waccm report
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State of the WACCM Report. Current status of WACCM WACCM1b frozen and accessible on the web https://dataportal.ucar.edu Model code and documentation Selected datasets Interactive WACCM work in progress WACCM2: based on CAM2, produces acceptable climatology at 2x2.5 and 4x5

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State of the WACCM Report

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State of the waccm report

State of the WACCM Report


State of the waccm report

  • Current status of WACCM

  • WACCM1b frozen and accessible on the web

    • https://dataportal.ucar.edu

    • Model code and documentation

    • Selected datasets

  • Interactive WACCM work in progress

    • WACCM2: based on CAM2, produces acceptable climatology at 2x2.5 and 4x5

    • WACCM2 + solar variability modules (aurora, ion chemistry, extreme EUV sw heating, ion drag, and Joule heating): currently being tested

    • WACCM3: based on CAM3, reproduces results of WACCM2, at 4x5

    • Once solar modules are tested in WACCM2, will implement them in WACCM3


State of the waccm report

Some results from WACCM2 at 4x5


State of the waccm report

More results from WACCM2 at 4x5

Equatorial water max. stable @ 6 ppm


State of the waccm report

WACCM2/WACCM3 (4x5) Comparison

WACCM3

WACCM2


State of the waccm report

Major science projects planned

  • GHG + CFC trend run: 1975-present: a repeat of the work done with WACM1b + MZ3, using interactive model; evaluate observed trends in O3, H2O, T, etc.

  • Response to the 11-year solar cycle: can 11-year variability documented in observations be reproduced with a comprehensive, interactive model?

  • Other collaborative projects, with LASP (to be described by DK)


State of the waccm report

Model development strategy

  • Both NCAR projects (GHG, solar cycle) require an interactive model; several collaborative projects with LASP projects do as well

  • Should we use WACCM2 (interactive WACCM based on CAM2) or WACCM3 (interactive, based on CAM3)?

  • Success with WACCM3 suggests that this be the model of choice

  • Depending on progress in testing the solar variability modules, it may be desirable to wait until these are incorporated in WACCM3 before undertaking the GHG and solar cycle experiments

  • Other work can proceed immediately using either WACCM2 or WACCM3, without solar variability modules


State of the waccm report

Papers in preparation (NCAR group)

  • Trends in temperature and atmospheric constituents, 1979-2000 [WACCM1b]

  • The 2-day wave: model calculations with WACCM and comparison with TIMED/SABER data [WACCM1b]

  • High-frequency, planetary-scale motions in the MLT simulated by WACCM [WACCM1b]

  • Effects of interactive ozone chemistry on simulations of the middle atmosphere [WACCM2]

  • Others?


State of the waccm report

Today’s Agenda

  • Doug Kinnison (15 min)

    • Climatology of 2x2.5 WACCM2

    • Comparison with satellite occultation data (collaboration with LASP)

    • Other collaborative work in progress

    • Dehydration/denitrification updates for WACCM2

  • Yaga Beres (15 min)

    • Specification of mesoscale convective gw spectrum in WACCM2

  • Andrew Gettelman (15 min)

    • Supersaturation experiments with WACCM2

    • Dehydration near the summer mesopause

  • Dan Marsh (15 min)

    • Solar variability modules for WACCM3

  • Mijeong Park (15 min)

    • Monsoon region UTLS study

  • General discussion, as needed (30 min)


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