Bias correction of the observed daily precipitation and re‐division of climatic zones in China

摘要

> Using accurate precipitation data is critical to climate and hydrology research, but current studies have found that the precipitation measured by various standard precipitation gauges ( P _m ) is much smaller than actual precipitation and there is a necessity to conduct bias correction before using the gauge‐measured precipitation ( P _m ) data. Using the daily P _m , wind speed and temperature data from 553 weather stations in China over 1961–2015, the wind‐induced error ( type="mathematics"> ?P _DL ), trace precipitation ( type="mathematics"> Δ P _t ) and wetting loss ( type="mathematics"> Δ P _w ) and the corrected precipitation ( P _c ) were systematically estimated. Consequently, the originally P _m ‐based climate zone division changed after the precipitation bias correction. The climate zone re‐division was conducted using four P _c ‐based indices, that is, annual mean precipitation