Heavy rainfall and associated atmospheric fields around the La Plata
basin in southern South America are investigated using Precipitation
Radar （PR）data onboard the Tropical Rainfall Mesuring Mission
satellite(TRMM) for 1998−2003.
Around the La Plata basin, the rain frequency is not so high, but the
probability of the heavy rainfall when it rains is high.
In the austral summer season, the probability of the heavy rainfall when
it rains in the La Plata basin, especially in the western part of the
basin along the Andes Mountain, is highest in the South American
continent. On the contrary, in the austral winter season, the rainfall
area limites to the eastern part of the basin, and the probability of
the heavy rainfall when it rains is moderate compared with summer.
Thus, the rainfall area and rain strength around the La Plata basin have
the big seasonal variation.
From the mean synoptic‐scale structure associated with the strong
rainfall around the La Plata basin, the difference of the strength of
rainfall around the La Plata basin between summer and winter is
explained by the difference of the amount of the moisture transport
from the tropics to the La Plata basin.
References
Sasaki Master thesis
