Global increase in tropical cyclone rain rate.

Although previous research has not yet detected any global trends in TC rainfall rates 19 , Lau and Zhou 20 found an increasing trend of total TC lifetime accumulate rain in the Atlantic and a decreasing trend in the northeast and northwest Pacific during two recent decades (1988–2007) using relatively low-resolution Global Precipitation Climatology Project (GPCP) data.

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Overall, observations exhibit an increasing trend in the average TC rainfall rate of about 1.3% per year, a fact that is contributed mainly by the combined effect of the reduction in the inner-core rainfall rate with the increase in rainfall rate on the rainband region.

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