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  • Understanding Diurnal Variability of Precipitation through Observations and Models (UDVPOM) x
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Tianjun Zhou, Rucong Yu, Haoming Chen, Aiguo Dai, and Yang Pan

over most of the Tibetan Plateau and its eastern periphery it peaks around midnight. The diurnal phase varies eastward along the Yangtze River valley. Precipitation data with high spatial and temporal resolution are required for studying the precipitation characteristics over China to resolve the complex coastlines and topography. As shown in Fig. 1 , the terrain over central China varies from the hills and plains in the east to the Sichuan Basin in the center and the Tibetan Plateau in the west

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Alex C. Ruane and John O. Roads

is the broadest of the three variance categories examined here and lacks any direct solar forcing. Ranging from ∼7 to 80 days, this variance category captures propagating synoptic systems, slow Rossby waves, Madden–Julian variability, and tropospheric “rivers” ( Newell et al. 1992 ), among other processes. All of these mechanisms are dynamic in nature, and thus the intraseasonal variance category is dominated by the transients in vapor flux convergence. The thermodynamic E ′ term contains the

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