A diagnostic study on heat sources and moisture sinks in the monsoon trough area during active-break phases of the Indian summer monsoon, 1979

U. V. Bhide; V. R. Mujamdar; S. P. Ghanekar; D. K. Paul; Tsing-Chang Chen; G. V. Rao

doi:10.3402/tellusa.v49i4.14683

A diagnostic study on heat sources and moisture sinks in the monsoon trough area during active-break phases of the Indian summer monsoon, 1979

Tellus

Volume 49 (1997): Issue 4

By: U. V. Bhide, V. R. Mujamdar, S. P. Ghanekar, D. K. Paul, Tsing-Chang Chen and G. V. Rao

Open Access

|Jan 1997

Abstract

The diabatic heating over the Indian monsoon trough area, along with its thermal structure are studied for the 1979 summer monsoon based on FGGE level-IIIb upper air data of the European Centre for Medium Range Weather Forecasts. The apparent heat source and the apparent moisture sink over the trough area varied coherently with the rainfall over central India. The spatial and temporal variations of the vertically integrated apparent heat source and moisture sink were found to be coincident. These coincidences suggested that diabatic heating was largely contributed by the latent heat released by cumulus convection. During the active periods, the vertical structure of spatially-averaged heating and drying rates above the monsoon trough area showed higher values, as much as 8 K to 11 K day

References

Alexander , George, R. N. Keshavamurty , U. S. De , R. Chella , S. K. Das and P. V. Pillai , 1978 . Fluctuations of monsoon activity . Ind. Jour. Met. Hydrol. Gyophys . 29 , 76 – 87 .
Search in Google Scholar Back to article
Chen , Tsing-Chang , Ren-Yow Tzeng and Ming-Cheng Yen , 1988 . Development and life cycle of the Indian monsoon: Effect of the 30-50 day oscillation. Mon. Wea. Re v . 116 , 2183 – 2199 .
Search in Google Scholar Back to article
Chen , Tsing-Chang and Jau-Ming Chen , 1993 . The 10-20 day mode of 1979 monsoon: Its relation with the time variation of monsoon rainfall. Mon. Wea. Re v . 121 , 2465 – 2482 .
Search in Google Scholar Back to article
Das P. K . 1962 . Mean vertical motion and non-adiabatic heat sources over India during the monsoon . Tellus 14 , 212 – 220 .
Search in Google Scholar Back to article
Dopplick , T. G . 1972 . Radiative Heating of the global atmosphere. J. Atmos. Sc i . 29 , 1278 – 1294 .
Search in Google Scholar Back to article
Krishnamurti , T. N. and Ramanathan , Y . 1982 . Sensitivity of monsoon onset to differential heating. J. Atmos. Sc i . 39 , 1290 – 1306 .
Search in Google Scholar Back to article
Krishnamurti , T. N. and Subramanyam , D . 1982 . The 30-50 day mode at 850 hPa during MONEX. J. Atmos. Sc i . 39 , 2088 – 2095 .
Search in Google Scholar Back to article
Krishnamurti , T. N. , Jayakumar , P. K. , Sheng , J. , Surgi , N. and Kumar , A . 1985 . Divergent circulations on the 30-50 day time scale. J. Atmos. Sc i . 42 , 364 – 375 .
Search in Google Scholar Back to article
Luo , H. and Yanai , M . 1983 . The large scale circulation and heat sources over the Tibetan Plateau and surrounding areas during early summer of 1979. Part I: Precipitation and Kinematic analysis. Mon. Wea. Re v . 112 , 922 – 944 .
Search in Google Scholar Back to article
Luo , H. and Yanai , M . 1984 . The large scale circulation and heat sources over the Tibetan Plateau and surrounding areas during early summer of 1979. Part II: Heat and moisture budgets. Mon. Wea. Re v . 112 , 966 – 989 .
Search in Google Scholar Back to article
Miller , F. R. and Kekshavamurty , R. N . 1968 . Structure of an Arabian sea summer monsoon system. Meteorological monograph. East-West Centre Press Hawaii.
Search in Google Scholar Back to article
Murakami , T. , Godbole , R. V. and Kelkar , R. R . 1970 . Numerical simulation of the monsoon along 80°E. Proc. Conf. Summer Monsoon South-East Asia . C. S. Ramage (ed.) Navy Weather Research Facility, Norfolk, VA 39 - 51 .
Search in Google Scholar Back to article
Murakami , T. , Chen , L. X. and Xie , A . 1986 . Relationship among seasonal cycles; low frequency oscillatin and transient disturbances as revealed from outgoing long-wave radiation data. Mon. Wea. Re v . 114 , 1456 – 1465 .
Search in Google Scholar Back to article
Nitta , T . 1977 . Response of cumulus updraft and down draft to GATE A/B-Scale motion system. J. Atmos. Sc i . 34 , 1161 – 1186 .
Search in Google Scholar Back to article
Nitta , T . 1983 . Observational study of heat sources over the eastern Tibetan Plateau during the summer monsoon . J. Meteor. Soc. Japan , 61 , 590 – 605 .
Search in Google Scholar Back to article
O’Brien , J . 1970 . Alternative solutions to the classical vertical velocity problem . J. Appl. Meteor . 9 , 197 – 203 .
Search in Google Scholar Back to article
Pant , P. S . 1983 . A physical basis for changes in the phases of the summer monsoon over India. Mon. Wea. Re v . 111 , 487 – 495 .
Search in Google Scholar Back to article
Ramamurthy , K . 1969 . Some aspects of the “break” in the Indian southwest monsoon during July and August . IMD , FMU Rep ., IV. 18 .
Search in Google Scholar Back to article
Ramaswamy , C . 1958 . A preliminary study of the behaviour of the Indian Southwest monsoon in relation to the westerly jet stream . Geophysica 6 , 455 – 476 .
Search in Google Scholar Back to article
Ramaswamy , C . 1968 . The problem of the southwest monsoon, Prince Mkarran Joh lectures, 1967. J. Indian Geophysics . Uni, Hyderabad, 5, nos 3, 4, 1 - 100 .
Search in Google Scholar Back to article
Rao , Y. P. 1976. Southwest Monsoon. Met. Monograph Synop ., Meteor. No. 1/1976, India Meteorological Department.
Search in Google Scholar Back to article
Vincent , D. G . 1982 . Circulation features over the south Pacific during 10-18 January 1979. Mon. Wea. Re v . 110 , 981 – 993 .
Search in Google Scholar Back to article
Yanai Michio , Steven Esbensen , Jan-Hwa Chu , 1973 . Determination of bulk properties of tropical cloud clusters from large-scale heat and moisture budgets. J. of Atmos. Sc i . 30 , 611 – 627 .
Search in Google Scholar Back to article
Yanai Michio , Chengfeng Li , Zhengshan Song , 1992 . Seasonal heating of the Tibetan Plateau and its effects on the evolution of the Asian summer monsoon . J. Meteor. Soc. Japan , 70 , 319 – 351 .
Search in Google Scholar Back to article

Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v49i4.14683 | Journal eISSN: 3035-9554

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Language: English

Page range: 455 - 473

Submitted on: Jun 13, 1995

Accepted on: Feb 7, 1997

Published on: Jan 1, 1997

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1997 U. V. Bhide, V. R. Mujamdar, S. P. Ghanekar, D. K. Paul, Tsing-Chang Chen, G. V. Rao, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 49 (1997): Issue 4