Using the daily precipitation data from 81 station in Guizhou Province from 1963 to 2011, climate characteristics of the rainy day and the impact to the total precipitation over Guizhou were analyzed. The results are as follows: With increasing precipitation levels, the rainy days reduce rapidly; total rainy days and light rainy days in western are more than those in eastern. While moderate rainy days, heavy rainy days and storm rainy days in southern are more than those in northern. In recent 49 years in Guizhou the total rainy days, light rainy days, moderate rainy days and heavy rainy days have all decreased, but storm rainy days have increased slightly. The light rainy days and the total rainy days reduced gradually in the early nineteen eighties, early in twenty-first Century after the drop is more obvious, and moderate rainy days in 1960's—1980's have many fluctuations, decreased rapidly at the beginning of the twenty-first century, the heavy rainy days and storm rainy days both have undergone two obvious fluctuation. With the rising level of precipitation the correlation coefficient increases rapidly, light rainy days and rainfall relate the worst, storm rainy days and rainfall relate the best. In positive yeas, the number of rainy days is obviously more, the light rainy days, moderate rainy days and heavy rainy days change significantly, in negative year, the number of rainy days is obviously less, the moderate rainy days changed significantly, then is heavy rainy days and storm rainy days. Therefore, the totod precipitation increase is mainly caused by the iuerease of the days about light rain, moderate rain and heavyrain, but precipitation decrease is moinly due to the decreesecd the days about moderate rain, heavy rain and storm rain. Comparison the levels of precipitation days, both in positive years or negative years, the days of moderate rain and heavy rain changes are signiticont.
WANG Fen
,
CAO Jie
,
LI Fuguang
,
SUN Xudong
,
GU Xiaoping
,
XIONG Wei
,
DUAN Rong
. Climate Characteristics of Rain Days and the Relationship between Rain Days and Total Amount of Precipitation in Guizhou[J]. Plateau Meteorology, 2015
, 34(1)
: 145
-154
.
DOI: 10.7522/j.issn.1000-0534.2013.00144
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