DOI: 10.3354/cr01492
Scopus记录号: 2-s2.0-85040571877
论文题名: Wind-stilling in the light of wind speed measurements: The Czech experience
作者: Brázdil R. ; Valík A. ; Zahradníček P. ; Řezníčková L. ; Tolasz R. ; Možný M.
刊名: Climate Research
ISSN: 0936577X
出版年: 2017
卷: 74, 期: 2 起始页码: 131
结束页码: 143
语种: 英语
英文关键词: Czech Republic
; Homogenisation
; Universal anemograph
; Vaisala wind-speed sensors
; Wind speed
; Wind stilling
英文摘要: Changes of instruments often give rise to significant break-points in wind-speed series. This is particularly applicable when measurements are automated, a process that started in the Czech Republic in the mid-1990s, when standard universal anemographs were progressively replaced by the Vaisala WAA251 sensor (cup anemometer) and the WS425 sensor (ultrasonic). Parallel wind speed measurements, by universal anemographs and Vaisala sensors, at the Doksany (2000-2016) and Kocelovice (2000-2016) stations enabled differences in the 2 types of measurement to be analysed. Vaisala sensors measure, on average, higher wind-speeds than universal anemographs, particularly in calm situations and at low wind speeds. The differences between the 2 types of instrument do not depend on wind direction. Linear trends of homogenised daily mean wind-speed series from only a universal anemograph or combined from universal anemograph and Vaisala sensors generally exhibit no important differences in their significance or values. This could indicate that observed decreasing trends in mean daily wind-speeds ('stilling') cannot be attributed to changes of wind-speed measurements to automated devices; with respect to only 2 stations being investigated, this is biased by high uncertainty. In contrast, important differences in the 2 types of measurement, both in linear trends and their significance, appear for series of 3 daily readings (07:00, 14:00 and 21:00 h LMT). © Inter-Research 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116298
Appears in Collections: 气候减缓与适应
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Recommended Citation:
Brázdil R.,Valík A.,Zahradníček P.,et al. Wind-stilling in the light of wind speed measurements: The Czech experience[J]. Climate Research,2017-01-01,74(2)