MATCH-MPIC

Model of Atmospheric Transport and Chemistry
Max-Planck-Institute for Chemistry Version

MATCH-MPIC has been under development since early 1994; there are now several papers using MATCH-MPIC which are published or in various stages of getting there.
Currently the best description of the most recent version of MATCH-MPIC is in Rolf von Kuhlmann's thesis, which can be obtained via Rolf's homepage.
Brief Description

The global atmospheric offline model, MATCH-MPIC (Model of Atmospheric Transport and CHemistry - Max Planck Institute for Chemistry version), has been developed for studies of atmospheric photochemistry. The meteorology component of MATCH-MPIC is the model MATCH, developed by Phil Rasch of NCAR. At present, MATCH-MPIC is driven by wind, temperature, pressure, and surface heat flux and wind stress data from the NCEP/NCAR reanalysis, at T63 horizontal resolution (roughly 1.9 degrees in latitude and longitude), and with 28 vertical levels (from the surface to about 2 hPa); a 30-minute time step is employed for these simulations. Several meteorological processes are simulated by MATCH: for advection, the model uses either the new SPITFIRE flux-form scheme, or the Semi-Lagrangian Transport (SLT) scheme; dry turbulent mixing is computed using a non-local boundary layer scheme; moist convection is diagnosed online based on either the Zhang/McFarlane/Hack (ZMH) scheme or the Pan/Wu scheme; cloud fractions are diagnosed based on a modified version of the Slingo scheme; and a semi-explicit cloud microphysics scheme is used to obtain cloud water amounts and large-scale precipitation.

The MATCH-MPIC "background" tropospheric photochemistry module considers 16 trace gases, and one trace gas family (NOx = NO + NO2). The 36 photochemical reactions are integrated forward in time using the quasi-steady-state approximation; the specific integration approximation (Euler-forward, Euler-backward, or steady state) used for each trace gas depends on its characteristic lifetime. The reaction rates are reevaluated each time step. The photolysis rates are also recomputed each time step, based on online actinic flux computations at eight representative wavelengths, along with cloud fractions and O3 profiles from MATCH-MPIC. The model includes explicit source terms for the major known NOx and CO emissions; methane is prescribed at the surface based on observations, and O3 and NOy are prescribed in the stratosphere based on satellite observations and observed ratios between NOy and O3, respectively. The dry deposition sink is based on monthly gridded deposition velocities for O3, NO, NO2, and HNO3, and on separate land and sea surface deposition velocities for CO, H2O2, and CH3OOH. Precipitation scavenging is applied based on the cloud water and precipitation rate parameters from the convection and microphysics parameterizations, along with Henry's Law partitioning constants and ice phase partitioning coefficients. The conversion of N2O5 to HNO3 on aerosols and cloud droplets (and subsequent removal or release to the gas phase) is also included. Finally, the redistribution of soluble trace gases via the gravitational settling of non-precipitate cloud particles is included in the newer model version.
MATCH (NCAR) Home Page
PUBLICATIONS ABOUT MATCH-MPIC

Lawrence, M. G., Photochemistry in the tropical pacific troposphere: Studies with a global 3D chemistry-meteorology model, PhD thesis, Georgia Institute of Technology, 520 pp., 1996.

Lawrence, M. G., P. J. Crutzen, P. J. Rasch, B. E. Eaton, and N. M. Mahowald, A model for studies of tropospheric photochemistry: Description, Global Distributions, and Evaluation, J. Geophys. Res., 104, 26,245-26,278, 1999.
PUBLICATIONS USING MATCH-MPIC

Lawrence, M. G., and P. J. Crutzen, The impact of cloud particle gravitational settling on soluble trace gas distributions, Tellus, 50b, 263-289, 1998.

Lawrence, M. G., J. Landgraf, P. Joeckel, and B. Eaton, Artifacts in global atmospheric modeling: Two recent examples, Eos, 80, 123-128, 1999.

Lawrence, M. G., P. J. Crutzen, and P. J. Rasch, Analysis of the CEPEX ozone data using a 3D chemistry-meteorology model, Quart. J. Roy. Met. Soc., 125, 2987-3009, 1999.

Lawrence, M. G., P. J. Crutzen, P. J. Rasch, B. E. Eaton, and N. M. Mahowald, A model for studies of tropospheric photochemistry: Description, Global Distributions, and Evaluation, J. Geophys. Res., 104, 26,245-26,278, 1999.

Lawrence, M. G., and P. J. Crutzen, Influence of NOx emissions from ships on tropospheric photochemistry and climate, Nature, 402, 167 - 170, 1999.

Lawrence, M. G., A technique for employing photochemical models to help evaluate trace gas sampling strategies, in press to Tellus, 2000.

Crutzen, P. J., and M. G. Lawrence, The impact of precipitation scavenging on the transport of trace gases: A 3-dimensional model sensitivity study, J. Atmos. Chem., 37, 81-112, 2000.

Crutzen, P. J., M. G. Lawrence, and U. Poeschl, On the background photochemistry of tropospheric ozone, Tellus, 51, 123-146, 1999.

Joeckel, P., M. G. Lawrence, and C. A. M. Brenninkmeijer, Simulations of cosmogenic 14CO using the 3D atmospheric model MATCH: Effects of 14C production patterns and the solar cycle, J. Geophys. Res., 104, 11,733-11,743, 1998.

Joeckel, P., C. A.M. Brenninkmeijer, and M. G. Lawrence, Atmospheric response time of cosmogenic 14CO to changes in solar activity, J. Geophys. Res.,Vol. 105(D5), 6737-6744, 2000.

Joeckel, P., R. von Kuhlmann, M. G. Lawrence, B. Steil, C.A.M. Brenninkmeijer, P. J. Crutzen, P. J. Rasch, and B. Eaton, On a fundamental problem in implementin g flux-form advection schemes for tracer transport in 3-dimensional general circulation and chemistry transport models, Q. J. R. Meteorol. Soc., in press, 2000.

von Kuhlmann, R., U. Poeschl, M.G. Lawrence, N. Poisson, M. Kanakidou, and P.J. Crutzen; The effect of isoprene chemistry on global trace gas distributions, Poster presented at the Joint International Symposium on Global Atmospheric Chemistry, Seattle, Washington, 1998.