Homogenization of DailyMean Wind Speed Series from 1951 to 2015 in BeijingTianjinHebei Area
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Abstract:
Based on the metadata archive, the detection of inhomogeneity and the homogenization of raw dailymean wind speed data of 179 meteorological observation stations from 1951 to 2015 in the region of Beijing, Tianjin and Hebei Provinces are conducted. The results show: in the order of the ratio of contributions to inhomogeneity, the instrument switching accounts for 40%, the station relocating 34%, the schedule changing of the observational task 18%, environment changing around the station 8%. The wind speed decreased in both the raw data and the homogenized data, and the latter declined significantly faster. Their linear trends have the similar characteristics, with a distribution: there is a banded region of the fastest declining wind speed from northwest to southeast, and the second fastest declining area in the western Hebei, and the slowest declining area in the northeastern Hebei. The faster declining rate is found mainly in the areas north of 39°N in the homogenized data, which can accurately reflect the climatic change characteristic and is reliable.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.