TITLE

An Explicit Simulation of Tropical Cyclones with a Triply Nested Movable Mesh Primitive Equation Model: TCM3. Part II: Model Refinements and Sensitivity to Cloud Microphysics Parameterization

AUTHOR(S)
Wang, Yuqing
PUB. DATE
December 2002
SOURCE
Monthly Weather Review;Dec2002, Vol. 130 Issue 12, p3022
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
It has been long known that cloud microphysics can have a significant impact on the simulations of precipitation; however, there have been few studies so far that have investigated the effect of cloud microphysics on tropical cyclones. In the most advanced simulation of tropical cyclones by numerical models, the use of explicit cloud microphysics becomes more and more attractive with cumulus parameterization bypassed at very high resolutions. In this study, the sensitivity of the simulated tropical cyclone structure and intensity to the choice and details of cloud microphysics parameterization is investigated using the triply nested movable mesh tropical cyclone model TCM3 described in Part I but with several refinements. Three different cloud microphysics parameterization schemes are tested, including the warm-rain-only cloud microphysics scheme (WMRN) and two mixed-icephase cloud microphysics schemes, one of which has three ice species (cloud ice-snow-graupel; CTRL) while the other has hail instead of graupel (HAIL). It is shown that, although the cloud structures of the simulated tropical cyclone can be quite different with different cloud microphysics schemes, intensification rate and final intensity are not very sensitive to the details of the cloud microphysics parameterizations. This occurs because all of the schemes produce similar vertical heating profiles and similar levels of rainbands, stratiform clouds, and downdrafts. The latter are found to be prohibitive factors to tropical cyclone intensification and intensity. Both evaporation of rain and melting of snow and graupel are responsible for the generation of downdrafts and rainbands. This is demonstrated using two extra experiments in which the evaporation of rain and melting of snow and graupel are removed from WMRN or CTRL experiments. In these two extreme cases, neither significant rainbands nor downdrafts were generated. As a result, the storm developed much more rapidly and reached an...
ACCESSION #
8505250

 

Related Articles

  • Competition of precipitation particles in a model with parameterized cloud microphysics. Wacker, Ulrike // Journal of the Atmospheric Sciences;7/15/95, Vol. 52 Issue 14, p2577 

    Examines the microphysical processes of riming, accretion and sedimentation in a supercooled cloud containing several types of precipitation particles. Analogy of models for population dynamics and cloud physics; Analytical considerations; Numerical case studies for a mixed-phase cloud.

  • Separation of convective and stratiform precipitation using microwave brightness temperature. Ye Hong; Kummerow, Christian D. // Journal of Applied Meteorology;Aug99, Vol. 38 Issue 8, p1195 

    Examines the classification of convective and stratiform precipitation using microwave brightness temperature. Separation techniques on convective and stratiform precipitation; Development of satellite microwave C/S index; Utilization of a dynamic cloud model and radiative transfer...

  • Terminal Velocities of Droplets and Crystals: Power Laws with Continuous Parameters over the Size Spectrum. Khvorostyanov, Vitaly I.; Curry, Judith A. // Journal of the Atmospheric Sciences;6/1/2002, Vol. 59 Issue 11, p1872 

    This paper presents a unified treatment of cloud particle fall velocities for both liquid and crystalline cloud particles over the entire size range observed in the atmosphere. The fall velocity representation is formulated in terms of the Best (or Davies) number X,, and the Reynolds number Re....

  • Seasonal, interannual and long-term variability of precipitation and snow depth in the region of the Barents and Kara seas. Aleksandrov, Yevgeniy I.; Bryazgin, Nikolay N.; Førland, Eirik J.; Radionov, Vladimir F.; Svyashchennikov, Pavel N. // Polar Research;Jul2005, Vol. 24 Issue 1/2, p69 

    Observation data of temperature, precipitation and snow depth have been compiled and generalized climatologically for a network of 38 stations in and around the Barents and Kara seas, for the period 1951–1992. The monthly precipitation totals were corrected for measuring errors, and the...

  • Numerical simulation of frontal rainbands over Ukraine under different mechanisms of cloud and precipitation formation. Pirnach, A. M.; Krakovskaia, S. V.; Belokobylski, A. V. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p534 

    Three-dimension diagnostic and prognostic models were used for numerical simulation of cloud system accompanied the passage of a cyclone over Ukraine. The response of time and space distribution of cloud particle spectra, integral features and precipitation on changing of cloud and precipitation...

  • Numerical Modeling of Precipitation Cores on Cold Fronts. Brown, Michael J.; Locatelli, John D. // Journal of the Atmospheric Sciences;5/1/99, Vol. 56 Issue 9, p1175 

    Uses a nonhydrostatic, three-dimensional mesoscale model, including cloud physics, to simulate the structure of a narrow cold-frontal rainband (NCFR). Details on the precipitation associated with cold fronts; Model description and simulation techniques; Comparison of model results with...

  • Gridded Climate Monthly Frequencies of Precipitation Amount for 1-, 3,, and 6-h Periods over the Conterminous United States CHARBA, JEROME P.; LIU, YUUN; HOLLAR, MATTHEW H.; EXLEY, BRYAN; BELAYACHI, ANWAR // Weather & Forecasting;Mar1998, Vol. 13 Issue 1, p25 

    Gridded fields of monthly mean relative frequency for ≥ 0.10 (2.5), ≥ 0.25 (6.4), ≥ 0.50 (12.7), ≥ 1.00 (25.4), and ≥ 2.00 (50.8) in. (mm) of precipitation have been developed for 1-, 3-, and 6-h periods over the conterminous United States. The frequency fields are...

  • Changing Impacts of North Atlantic Tropical Cyclones on Extreme Precipitation Distribution across the Mid-Atlantic United States. Dhakal, Nirajan // Geosciences (2076-3263);May2019, Vol. 9 Issue 5, p207 

    Almost every year, north Atlantic tropical cyclones (TCs) are responsible for significant socioeconomic losses across the Mid-Atlantic USA. However, the extent to which TC activity contributes to the changes in the probability distributions of the extreme precipitation have not yet been...

  • CHAPTER 9: Precipitation--Forms and Effects of Ice and Water. Schaeffer, Vincent J.; Day, John A. // Peterson Field Guide to Atmosphere;1981, p242 

    This chapter illustrates some of the more commonly occurring forms of precipitation, with the major emphasis on solid forms since they are most readily observed. In a stratus cloud the droplets have varying sizes depending on the number of cloud condensation nuclei in the air. Oregon or Scotch...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics