Characteristics of Diurnal Variations in Convection and Precipitation over the Southern Tibetan Plateau during Summer

Fujinami, Hatsuki; Nomura, Shigeyuki; Yasunari, Tetsuzo

doi:10.2151/sola.2005-014

Cited by 102 publications

(81 citation statements)

References 15 publications

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“…The convective activity is strong at 12:00 UTC and weak at 00:00 UTC. Recent studies using field observations, radar data and satellite data have confirmed these results (e.g., Liu et al, 2002;Bhatt and Nakamura, 2005;Fujinami et al, 2005).…”

Section: Introductionmentioning

confidence: 76%

“…So the nocturnal maximum in precipitation at the lower part of the southern slope is not from the southward shift of the precipitation at the higher elevation up to the southern edge of the TP. Therefore, the mountain-plain solenoid which is widely used to explain the diurnal variation and propagation of convection (e.g., Carbone et al, 2002;He and Zhang, 2010;Wang et al, 2004) is likely to be not suitable here. Based on the model results, the authors propose a new possible mechanism responsible for this nocturnal precipitation maximum.…”

Section: Possible Mechanism Responsible For the Nocturnalmentioning

confidence: 99%

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Diurnal variation of summer precipitation over the Tibetan Plateau: a cloud-resolving simulation

Xu¹,

Zhang²,

Wang³

et al. 2012

Ann. Geophys.

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Abstract. In this study, the Weather Research and Forecasting model was used to simulate the diurnal variation in summer precipitation over the Tibetan Plateau (TP) at a cloudresolving scale. Compared with the TRMM, precipitation data shows that the model can well simulate the diurnal rainfall cycle with an overall late-afternoon maximum precipitation in the central TP and a nighttime maximum in the southern edge. The simulated diurnal variations in regional circulation and thermodynamics are in good correspondence with the precipitation diurnal cycles in the central and southern edge of TP, respectively. A possible mechanism responsible for the nocturnal precipitation maximum in the southern edge has been proposed, indicating the importance of the TP in regulating the regional circulation and precipitation.

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Section: Introductionmentioning

confidence: 76%

Section: Possible Mechanism Responsible For the Nocturnalmentioning

confidence: 99%

Diurnal variation of summer precipitation over the Tibetan Plateau: a cloud-resolving simulation

Xu¹,

Zhang²,

Wang³

et al. 2012

Ann. Geophys.

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“…Such studies use either rain-gauge measurements (e.g. Fujinami et al 2005;Zhao et al 2005;Yu et al 2007a, b;Li et al 2008) or satellite data Chen et al 2009;Yu et al 2009;He and Zhang 2010). The nocturnal precipitation in the Sichuan Basin in summer, i.e.…”

Section: Introductionmentioning

confidence: 99%

The quasi-stationary feature of nocturnal precipitation in the Sichuan Basin and the role of the Tibetan Plateau

Jin

2012

Clim Dyn

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The nocturnal precipitation in the Sichuan Basin in summer has been studied in many previous works. This paper expands the study on the diurnal cycle of precipitation in the Sichuan Basin to the whole year. Results show that the nocturnal precipitation has a specific quasistationary feature in the basin. It occurs not only in summer but also in other three seasons, even more remarkable in spring and autumn than in summer. There is a prominent eastward timing delay in the nocturnal precipitation, that is, the diurnal peak of precipitation occurs at early-night in the western basin whereas at late-night in the center and east of the basin. The Tibetan Plateau plays an essential role in the formation of this quasi-stationary nocturnal precipitation. The early-night peak of precipitation in the western basin is largely due to strong ascending over the plateau and its eastern lee side. In the central and eastern basin, three coexisting factors contribute to the late-night peak of precipitation. One is the lower-tropospheric southwesterly flow around the southeastern edge of the Tibetan Plateau, which creates a strong cyclonic rotation and ascendance in the basin at late-night, as well as brings abundant water vapor. The second is the descending motion downslope along the eastern lee side of the plateau, together with an air mass accumulation caused by the warmer air mass transport from the southeast of the Yunnan-Guizhou Plateau, creating a diabatic warming at low level of the troposphere in the central basin. The third is a cold advection from the plateau to the basin at late-night, which leads to a cooling in the middle troposphere over the central basin. All these factors are responsible for precipitation to occur at late-night in the central to eastern basin.

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“…For example, Fujinami et al [2005] investigated the diurnal variations in rainfall over the mountain-valley terrain of the southern Tibetan plateau. They found that rainfall activity usually occurs over the mountains in early afternoon and over the valley in late evening.…”

Section: Introductionmentioning

confidence: 99%

Diurnal rainfall pattern observed by Tropical Rainfall Measuring Mission Precipitation Radar (TRMM‐PR) around the Indochina peninsula

et al. 2010

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[1] This study addressed the diurnal cycle of rainfall during the summer monsoon season (May to September) around the Indochina peninsula, with a focus on the diurnal cycle's relationship to terrain. The investigation used 10 year (1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007) Tropical Rainfall Measuring Mission Precipitation Radar (TRMM-PR) observations. Results revealed that the diurnal variations in rainfall over the Indochina region had three distinct peaks. An early afternoon maximum of rainfall occurred along the mountain ranges and on coastal land. Evening rainfall was observed near the foot of mountain ranges, in a valley, and in a basin-shaped plain; this rainfall weakened before the middle of the night. Heavy rainfall in the early morning was found around the coasts over the eastern Gulf of Thailand and the Bay of Bengal, as well as over the eastern Khorat Plateau. We found that nearly half of the total rainfall occurred in the early morning over these regions, which indicated that early morning rainfall significantly contributes to the climatological rainfall pattern. Note that the regions with early morning heavy rain did not correspond to windward faces of mountains but to the windward plain or to an offshore area apart from the mountain ranges in the windward direction. Additional examination of rainfall frequency and rainfall intensity showed that this early morning heavy rainfall was composed of frequent or long-lasting rainfall events with a strong intensity.

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Characteristics of Diurnal Variations in Convection and Precipitation over the Southern Tibetan Plateau during Summer

Cited by 102 publications

References 15 publications

Diurnal variation of summer precipitation over the Tibetan Plateau: a cloud-resolving simulation

Diurnal variation of summer precipitation over the Tibetan Plateau: a cloud-resolving simulation

The quasi-stationary feature of nocturnal precipitation in the Sichuan Basin and the role of the Tibetan Plateau

Diurnal rainfall pattern observed by Tropical Rainfall Measuring Mission Precipitation Radar (TRMM‐PR) around the Indochina peninsula

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