Journal
MONTHLY WEATHER REVIEW
Volume 138, Issue 4, Pages 1017-1025Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/2010MWR3356.1
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Funding
- Chinese Academy of Meteorological Sciences [2008Z002]
- National Key Project of China for Developing Basic Sciences [2004CB418307]
- U.S. National Science Foundation [ATM-0618662, ATM-0904635]
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [0904635] Funding Source: National Science Foundation
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This study examines the diurnal variations of the warm-season precipitation over northern China using the high-resolution precipitation products obtained from the Climate Prediction Center's morphing technique (CMORPH) during May-August of 2003-09. The areas of focus are the Yanshan-Taihangshan Mountain ranges along the east peripheries of the Loess and Inner Mongolian Plateaus and the adjacent North China Plains. It is found that the averaged peak in local precipitation begins early in the afternoon near the top of the mountain ranges and propagates downslope and southeastward at a speed of similar to 13 m s(-1). The peak reaches the central North China Plains around midnight and the early morning hours resulting in a broad area of nocturnal precipitation maxima over the plains. The diurnal precipitation peak (minimum) is closely collocated with the upward (downward) branch of a mountain plains solenoid (MPS) circulation. Both the MPS and a low-level southwesterly nocturnal jet are likely to be jointly responsible for the nighttime precipitation maxima over the plains.
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