LOGIN TO YOUR ACCOUNT

Username
Password
Remember Me
Or use your Academic/Social account:

CREATE AN ACCOUNT

Or use your Academic/Social account:

Congratulations!

You have just completed your registration at OpenAire.

Before you can login to the site, you will need to activate your account. An e-mail will be sent to you with the proper instructions.

Important!

Please note that this site is currently undergoing Beta testing.
Any new content you create is not guaranteed to be present to the final version of the site upon release.

Thank you for your patience,
OpenAire Dev Team.

Close This Message

CREATE AN ACCOUNT

Name:
Username:
Password:
Verify Password:
E-mail:
Verify E-mail:
*All Fields Are Required.
Please Verify You Are Human:
fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
DELL'OSSO, LORENZO; CHEN, SHOU-JUN (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Subjects:
The formation of a vortex and shear line over the Qinghai-Tibet Plateau (QTP) was investigated with numerical experiments using the ECMWF grid point model. The case chosen occurred between 24 and 26 July, 1982, when the south-west monsoon invaded the QTP and a vortex developed. The correct simulation of the vortex in the model shows that it is possible to predict the atmospheric circulation over the QTP and the consequent weather over China. When the simulation was rerun with a dry model (i.e., without the release of latent heat), it was found that only a weak vortex formed. This shows that the release of latent heat is an extremely important factor in the development of the vortex over the QTP, and confirms earlier diagnostic and synoptic studies. The surface sensible heat fluxes, large near the northern and southern flanks of the QTP, appear to have a damping effect on the formation of the vortex; i.e., the vortex was greatly intensified in their absence. It was also found that the intensity of the vortex was dependent upon the height of the QTP: when the mountain height was reduced, the westerly trough invaded the QTP and no vortex formed at 500 mb; when it was increased, the south-west monsoon travelled along the southern boundary of the QTP and intensified the low-level jet south of the vortex area. The results of a 48-h integration with a fine-mesh model (resolution 0.5° of latitude and longitude) showed an improvement in forecasting the location of the vortex with respect to the coarse-mesh model (1.875° of latitude and longitude). However, when compared with the coarse-mesh analysis, the intensity of the vortex was overpredicted. This may be due to mesoscale orographic forcing and exaggerated latent heating.DOI: 10.1111/j.1600-0870.1986.tb00468.x
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Arakawa, A. and Schubert, W. H. 1974. Interaction of a cumulus cloud ensemble with the large-scale environment: part 1. J . Aimos. Sci. 31, 674-701.
    • Bannon, P. R. 1982. On the dynamics of the east African jet. I l l : Arabian Sea branch. J. Atmos. Sci. 39, 2267-2278.
    • Burridge, D. M. and Haseler, J. 1977. A model for medium range weather forecasting. ECM WF Tech. Rep No. 4.45 pp.
    • Charney, J. G. and Eliassen, A. 1949. A numerical method for predicting the perturbation of the middle latitude westerlies. Tellus I , no. 2, 38-55.
    • Chen. S. J. and Dell'Osso, L. 1984. Numerical prediction of the heavy rainfall vortex over the eastern Asia monsoon region. J . Meieorol. Soc. Japan 62, 730- 747.
    • Chen, S. J. and Weng, D. M. 1984. A preliminary study o f the surface sensible heat flux and latent heat release over Qinghai-Xizang plateau. Collected papers of QXPMEX. Vol. 2. 35-45. Science Press, Beijing (in Chinese).
    • Dell'Osso. L. 1984. High resolution experiments with the ECMWF model: a case study. Mon. W e a . Rev. 112, 1853-1 883.
    • Flohn. H. 1968. Contribution 10 a meteorology of the Tibetan Highlands. Atmos. Sci. Paper 130, Colorado State Univ.. Ft. Collins. I20 pp.
    • Kuo, H. L. 1974. Further studies of the parameterization of the influence of cumulus convection on large-scale flow. J. Atmos. Sci. 31, 1232-1240.
    • Lhasa Workshop, 1981. Siudies of ihe vortices and shear lines at 500 mb over Qinghai-Xizang (Tibet) plateau during summer. Science Press, Beijing, 122 pp (in Chinese).
    • Orlansky, 1. 1975. A rational subdivision of scales for atmospheric processes. Bull. Amer. Meteorol. Soc. 56, 527-530.
    • Petterssen. S . 1956. Weather analysis and forecasting, vol. I. McGraw-Hill. New York.
    • Tao. S. Y. and Ding, Y. H. 1981. Observational evidence of the influence of the Qinghai-Xizang (Tibet) plateau on the occurrence of the heavy rain and severe convective storms in China. Bull. Amer. Meteorol. SOC6.2,23-30.
    • Tiedtke, M.. Geleyn, J-F., Hollingsworth, A. and Louis, J-F. 1979. ECMWF model parameterization of sub-grid scale processes. ECMWF Tech. Rep. no. 10, 46 PP.
    • Wallace. J. M.. Tibaldi. S. and Simmons, A. J. 1983. Reduction of systematic forecast errors in the ECMWF model through the introduction of an envelope orography. Q . J . R . Meieorol. Soc. 109. 683-718.
    • Wu, G. X. 1983. The inf7uence of large scale orography upon ihe general circulaiion of ihe atmosphere. Ph.D. thesis, London University, 203 pp.
    • Yeh, T. C. and Gao. Y. X. 1979. The rneieorology of the Qinghai-Xizang (Tibet)plateau. Science Press, Beijing 278 pp (in Chinese).
  • No related research data.
  • No similar publications.

Share - Bookmark

Cite this article

Collected from