Wind-stilling in the light of wind speed measurements: the
Czech experience

J 2018

Wind-stilling in the light of wind speed measurements: the Czech experience

BRÁZDIL, Rudolf, Adam VALÍK, Pavel ZAHRADNÍČEK, Ladislava ŘEZNÍČKOVÁ, Radim TOLASZ et. al.

Basic information

Original name

Wind-stilling in the light of wind speed measurements: the Czech experience

Authors

BRÁZDIL, Rudolf (203 Czech Republic, guarantor, belonging to the institution), Adam VALÍK (203 Czech Republic, belonging to the institution), Pavel ZAHRADNÍČEK (203 Czech Republic), Ladislava ŘEZNÍČKOVÁ (203 Czech Republic, belonging to the institution), Radim TOLASZ (203 Czech Republic) and Martin MOŽNÝ (203 Czech Republic)

Edition

Climate Research, OLDENDORF LUHE, INTER-RESEARCH, 2018, 0936-577X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10509 Meteorology and atmospheric sciences

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.984

RIV identification code

RIV/00216224:14310/18:00100756

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.3354/cr01492

UT WoS

000418809900004

Keywords in English

universal anemograph; Vaisala wind-speed sensors; wind speed; homogenisation; wind stilling; Czech Republic

Abstract

V originále

Changes of instruments often give rise to significant break-points in wind-speed series. This is particularly applicable to when measurements are automated, a process that started in the Czech Republic in the mid-1990s, when standard universal anemographs were progressively replaced by 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 two 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 two 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 two stations being investigated, this is biased by high uncertainty. On the other hand, important differences in the two types of measurement, both in linear trends and their significance, appear for series of three daily readings (0700, 1400 and 2100 LMT).

Links

GA15-11805S, research and development project

Name: Vichřice v českých zemích za posledních 500 let

Investor: Czech Science Foundation

MUNI/A/1419/2016, interní kód MU

Name: Integrovaný výzkum environmentálních změn v krajinné sféře Země II

Investor: Masaryk University, Category A

Citovat

BRÁZDIL, Rudolf, Adam VALÍK, Pavel ZAHRADNÍČEK, Ladislava ŘEZNÍČKOVÁ, Radim TOLASZ and Martin MOŽNÝ. Wind-stilling in the light of wind speed measurements: the Czech experience. Climate Research. OLDENDORF LUHE: INTER-RESEARCH, 2018, vol. 74, No 2, p. 131-143. ISSN 0936-577X. Available from: https://dx.doi.org/10.3354/cr01492.

@article{1396185,
   author = {Brázdil, Rudolf and Valík, Adam and Zahradníček, Pavel and Řezníčková, Ladislava and Tolasz, Radim and Možný, Martin},
   article_location = {OLDENDORF LUHE},
   article_number = {2},
   doi = {http://dx.doi.org/10.3354/cr01492},
   keywords = {universal anemograph; Vaisala wind-speed sensors; wind speed; homogenisation; wind stilling; Czech Republic},
   language = {eng},
   issn = {0936-577X},
   journal = {Climate Research},
   note = {Rok uplatnění 2018, přenášet do RIV až v roce 2019!},
   title = {Wind-stilling in the light of wind speed measurements: the Czech experience},
   url = {http://dx.doi.org/10.3354/cr01492},
   volume = {74},
   year = {2018}
}

TY  - JOUR
ID  - 1396185
AU  - Brázdil, Rudolf - Valík, Adam - Zahradníček, Pavel - Řezníčková, Ladislava - Tolasz, Radim - Možný, Martin
PY  - 2018
TI  - Wind-stilling in the light of wind speed measurements: the Czech experience
JF  - Climate Research
VL  - 74
IS  - 2
SP  - 131-143
EP  - 131-143
PB  - INTER-RESEARCH
SN  - 0936577X
N1  - Rok uplatnění 2018, přenášet do RIV až v roce 2019!
KW  - universal anemograph
KW  - Vaisala wind-speed sensors
KW  - wind speed
KW  - homogenisation
KW  - wind stilling
KW  - Czech Republic
UR  - http://dx.doi.org/10.3354/cr01492
N2  - Changes of instruments often give rise to significant break-points in wind-speed series. This is particularly applicable to when measurements are automated, a process that started in the Czech Republic in the mid-1990s, when standard universal anemographs were progressively replaced by 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 two 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 two 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 two stations being investigated, this is biased by high uncertainty. On the other hand, important differences in the two types of measurement, both in linear trends and their significance, appear for series of three daily readings (0700, 1400 and 2100 LMT).
ER  -

BRÁZDIL, Rudolf, Adam VALÍK, Pavel ZAHRADNÍČEK, Ladislava ŘEZNÍČKOVÁ, Radim TOLASZ and Martin MOŽNÝ. Wind-stilling in the light of wind speed measurements: the Czech experience. \textit{Climate Research}. OLDENDORF LUHE: INTER-RESEARCH, 2018, vol.~74, No~2, p.~131-143. ISSN~0936-577X. Available from: https://dx.doi.org/10.3354/cr01492.

Detailed Information on Publication Record