2019
DOI: 10.5194/amt-2019-366
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Using global reanalysis data to quantify and correct airflow distortion bias in shipborne wind speed measurements

Abstract: Abstract. At sea, wind forcing is responsible for the formation and development of surface waves and represents an important source of near surface turbulence. Therefore, processes related to near surface turbulence and wave breaking, such as sea spray emission and air-sea gas exchange are often parametrised with wind speed. Shipborne wind speed measurements thus provide highly relevant observations. They can, however, be compromised by flow distortion due to the ship's structure and objects nearby the anemome… Show more

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Cited by 6 publications
(6 citation statements)
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“…7 shows scatter diagrams of matching averages at collocated clusters (panels a and b) and geographical distributions of biases (difference between WaMoS-II and satellite observations, panels c and d). Overall, in-situ measurements of wind speeds during ACE are consistent with concurrent satellite observations, with data laying along the 1:1 correlation line (wind observations are also in agreement with reanalysis data from the ERA-5 archive; Landwehr et al, 2020). Nevertheless, there is a notable RM SE ≈ 3.2 m/s, with R ≈ 0.70 and SI ≈ 0.360.…”
Section: Calibrationsupporting
confidence: 83%
“…7 shows scatter diagrams of matching averages at collocated clusters (panels a and b) and geographical distributions of biases (difference between WaMoS-II and satellite observations, panels c and d). Overall, in-situ measurements of wind speeds during ACE are consistent with concurrent satellite observations, with data laying along the 1:1 correlation line (wind observations are also in agreement with reanalysis data from the ERA-5 archive; Landwehr et al, 2020). Nevertheless, there is a notable RM SE ≈ 3.2 m/s, with R ≈ 0.70 and SI ≈ 0.360.…”
Section: Calibrationsupporting
confidence: 83%
“…3b). Further, water depth from the echo sounder, ship's positions, speed, and course from a Global Positioning System (GPS) receiver and true wind velocity and direction from two two-dimensional sonic anemometers operating as part of an automated weather station (AWS) and mounted at 31.5 m above mean sea level (see Schmale et al, 2019;Landwehr et al, 2020a;Thurnherr et al, 2020) are fed into the system. Wind measurements were acquired at a rate of 1 Hz, averaged over 175 s and converted from the measurement height to a neutral 10 m wind speed (U 10 ) by assuming a logarithmic profile (see Holthuijsen, 2007) before being passed on to the WaMoS-II.…”
Section: Instrumentation and Technical Configurationmentioning
confidence: 99%
“…(2019) available at https://doi.org/10.5281/zenodo.3559982; (3) Landwehr et al. (2020) available at https://doi.org/10.5281/zenodo.3836439; (4) Landwehr, Thurnherr et al. (2020) available at https://doi.org/10.5194/amt-13-3487-2020; (5) Schmale et al.…”
Section: Data Availability Statementmentioning
confidence: 99%