Diurnal variation of summer rainfall over Taiwan and its detection using TRMM observations

Abstract A surface-based rainfall monitoring network reveals that summer rainfall over Taiwan exhibits a prominent diurnal variation. In this study, an attempt has been made to detect the diurnal variability of Taiwan rainfall using observations from the Tropical Rainfall Measuring Mission (TRMM) satellite. The results show that the diurnal patterns of Taiwan rainfall can be detected with TRMM Microwave Imager (TMI) observations using a satellite observation period of 36 or more days, and detected signals match reasonably with those using continuous surface observations. However, sometimes, because of the unfavorable combination of satellite sampling and the occurrence of some transient regimes in local rainfall, there is a possibility of misinterpreting the diurnal cycle. The TRMM precipitation radar sensor also reveals a diurnal cycle of convective and stratiform rainfall. The convective activity increases during the late afternoon over Taiwan, which may be the effect of convection forced by localized m...

[1]  John M. Wallace,et al.  Satellite-Inferred Morning-to-Evening Cloudiness Changes , 1980 .

[2]  Phillip A. Arkin,et al.  Spatial and Annual Variations in the Diurnal Cycle of Large-Scale Tropical Convective Cloudiness and Precipitation , 1987 .

[3]  Thomas L. Bell,et al.  Detecting the Diurnal Cycle of Rainfall Using Satellite Observations , 1993 .

[4]  T. Nitta,et al.  Diurnal variation of convective activity over the tropical western pacific , 1994 .

[5]  Matthias Steiner,et al.  Climatological Characterization of Three-Dimensional Storm Structure from Operational Radar and Rain Gauge Data , 1995 .

[6]  J. Janowiak,et al.  The Global Precipitation Climatology Project (GPCP) combined precipitation dataset , 1997 .

[7]  P. Xie,et al.  Global Precipitation: A 17-Year Monthly Analysis Based on Gauge Observations, Satellite Estimates, and Numerical Model Outputs , 1997 .

[8]  Daesoo Han.  Tropical Rainfall Measuring Mission Science Data and Information System , 1993, Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium.

[9]  T. Wilheit,et al.  Estimation of the diurnal cycle of oceanic precipitation from SSM/I data , 1991 .

[10]  W. M. Gray,et al.  Diurnal Variation of Deep Cumulus Convection , 1977 .

[11]  Long S. Chiu,et al.  Diurnal Cycle of Oceanic Precipitation from SSM/I Data , 1995 .

[12]  R. J. Reed,et al.  The Diurnal Variation of Deep Convection and Inferred Precipitation in the Central Tropical Pacific During January–February 1979 , 1985 .

[13]  C. Kishtawal,et al.  A Pronounced Continental-Scale Diurnal Mode of the Asian Summer Monsoon , 2000 .

[14]  R. Arritt,et al.  Diurnal and Seasonal Variations of the Rainfall Measured by the Automatic Rainfall and Meteorological Telemetry System in Taiwan. , 1999 .

[15]  Christian Kummerow,et al.  A simplified scheme for obtaining precipitation and vertical hydrometeor profiles from passive microwave sensors , 1996, IEEE Trans. Geosci. Remote. Sens..

[16]  H. Hendon,et al.  The diurnal cycle of tropical convection , 1993 .

[17]  M. Murakami.  Analysis of the Deep Convective Activity Over the Western Pacific and Southeast Asia , 1983 .