Journal ArticleDOI
Influence of the Upper-Tropospheric Wind Shear upon Cloud Radiative Forcing in the Asian Monsoon Region
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TLDR
In this paper, the authors investigated the reason for the unusually large high-cloud amount in the Asian monsoon region during the summer monsoon season (June-September) using the top-of-the-atmosphere radiative flux and cloud data from satellites, as well as atmospheric data from NCEP-NCAR reanalysis.Abstract:
Using the top-of-the-atmosphere radiative flux and cloud data from satellites, as well as atmospheric data from NCEP–NCAR reanalysis, this paper investigates the reason for the unusually large high-cloud amount in the Asian monsoon region during the summer monsoon season (June–September). Earlier studies attributed the large negative net cloud radiative forcing in the Asian monsoon region to the unusually large high-cloud amounts with high optical depth. Analysis during 1985–89 suggests that the unique upper-tropospheric easterly wind shear [tropical easterly jet (TEJ)], present over the Asian monsoon region during the summer monsoon season, may be responsible for the unusual increase in cloud amount. This strong wind shear sweeps the cloud tops and may be unfavorable for cloud growth beyond about 300 hPa. The spreading of cloud tops by wind may increase the high-cloud amount. A significant association is found between the high-cloud amount and the speed of the easterly jet. In addition, magnitud...read more
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Journal ArticleDOI
Atmospheric water vapor transport associated with typical anomalous summer rainfall patterns in China
Tianjun Zhou,Rucong Yu +1 more
TL;DR: In this article, the authors reveal the atmospheric water vapor transports associated with typical anomalous summer rainfall patterns in China and show that the origins of water vapor supply related to anomalous rainfall patterns are different from those related to the normal monsoon rainfall.
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Aerosol-induced intensification of cooling effect of clouds during Indian summer monsoon.
TL;DR: Examination of the effect of aerosols on continental mesoscale convective cloud systems during the Indian summer monsoon finds that these aerosol–cloud interactions have a net cooling effect at the surface and the top-of-atmosphere.
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Contrasting trends in southwest monsoon rainfall over the Western Ghats region of India
TL;DR: In this paper, the authors examined the features of rainfall received and reasons for the observed rainfall patterns in the northern and southern WG and found an increase (decrease) southwest monsoon rainfall of about 1.6mm day−1 decade−1 in certain pockets of the northern (southern) WG.
Journal ArticleDOI
Regional distribution of deep clouds and cloud top altitudes over the Indian subcontinent and the surrounding oceans
TL;DR: In this paper, the authors derived the long-term monthly mean distributions of deep clouds and the regional differences in the cloud top brightness temperature (CTBT) over the Indian subcontinent and the surrounding oceanic regions (the northern and eastern BoB, the southeast Arabian Sea, and the eastern equatorial Indian Ocean) using National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer data for a period of 10 years and are compared with the direct observations of cloud top altitude (CTA) using Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (
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CloudSat observations of cloud-type distribution over the Indian summer monsoon region
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References
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Journal ArticleDOI
The NCEP/NCAR 40-Year Reanalysis Project
Eugenia Kalnay,Masao Kanamitsu,Robert Kistler,William D. Collins,D.G. Deaven,L. S. Gandin,M. Iredell,Suranjana Saha,Glenn H. White,John S. Woollen,Yuejian Zhu,Muthuvel Chelliah,Wesley Ebisuzaki,Wayne Higgins,John E. Janowiak,Kingtse C. Mo,Chester F. Ropelewski,Julian X. L. Wang,Ants Leetmaa,Richard W. Reynolds,Roy L. Jenne,Dennis Joseph +21 more
TL;DR: The NCEP/NCAR 40-yr reanalysis uses a frozen state-of-the-art global data assimilation system and a database as complete as possible, except that the horizontal resolution is T62 (about 210 km) as discussed by the authors.
Journal ArticleDOI
Monsoons: Processes, predictability, and the prospects for prediction
Peter J. Webster,V. O. Magaña,Tim Palmer,Jagadish Shukla,Robert A. Tomas,M. Yanai,Tetsuzo Yasunari +6 more
TL;DR: In this article, a thorough description of observed monsoon variability and the physical processes that are thought to be important is presented, and some strategies that may help achieve improvement are discussed.
Journal ArticleDOI
On the Maximum Cloud Zone and the ITCZ over Indian, Longitudes during the Southwest Monsoon
D. R. Sikka,Sulochana Gadgil +1 more
TL;DR: The daily variation of the maximum cloud zone (MCZ) and the 7W mb trough in the Northern Hemisphere over the Indian longitudes 70-90°E during April-October for 1973-77 as mentioned in this paper.
Journal ArticleDOI
Cloudiness Fluctuations Associated with the Northern Hemisphere Summer Monsoon
TL;DR: The broad-scale fluctuations of cloudiness over the Eastern Hemisphere during the northern summer monsoon were investigated by using daily satellite mosaic pictures taken from June 1 to September 30, 1973.
Journal ArticleDOI
Seasonal variation of cloud radiative forcing derived from the Earth Radiation Budget Experiment
Edwin F. Harrison,Patrick Minnis,Bruce R. Barkstrom,Veerabhadran Ramanathan,Robert D. Cess,Gary G. Gibson +5 more
TL;DR: In this paper, the impact of clouds on the earth's radiation balance is assessed in terms of longwave, shortwave, and net cloud forcing by using monthly averaged clear-sky and cloudy-sky flux data derived from the NASA Earth Radiation Budget Experiment (ERBE).
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