Jurnal

Detection and Documentation of Discontinuities in Annual Gust Factor Time Series at U.S. Observing Sites

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ABSTRACT: Gust factors are widely used in engineering applications to adjust wind data to standard siting and roughness conditions. Multiyear average gust factors have been typically applied in the applications. Using 1-min Automated Surface Observing System (ASOS) data from over 500 stations in the contiguous United States, the gust factor record is assessed for significant discontinuities using an objective piecewise linear regression fitting technique. Discontinuities are identified at a majority of stations and generally affect multiple wind directions at each station. These results are made available as a dataset providing annual gust factors and identified breakpoints for each station. Aside from the known change from cup to ultrasonic anemometers in the mid-2000s, the most pervasive discontinuity is associated with a largely undocumented transition of the model of ultrasonic anemometer in use at ASOS stations that commenced in 2018. This systematic change has resulted in an increase in gust factors on the order of 0.1 (5%-7%). Other discontinuities are also prevalent and can be ascribed to documented station relocations and changes in land use. During the period with ultrasonic anemometers, approximately 75% of the discontinuities were characterized as trends with an average slope of 10.02 yr21 The remainder of the discontinuities were identified as jumps, averaging 10.08 in magnitude. The transition from cup to ultrasonic anemometers also caused the gust factor record to increase by an average of 0.1 (5%-7%). While cup anemometers were in use, discontinuities tended to cause gust factors to decrease, presumably due to mechanical wear of the anemometer components.

KEYWORDS: Wind; Wind gusts; Data quality control; Instrumentation/sensors; Changepoint analysis

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

551.5180973 DEG d

Penerbit

Boston, USA : American Meteorological Society., 2026

Deskripsi Fisik

Page(s): 299-309; Illus

Bahasa

English

ISBN/ISSN

1558-8432

Klasifikasi

551.5180973

Tipe Isi

text

Tipe Media

unspecified

Tipe Pembawa

volume

Edisi

Volume 65 (2026): Issue 2 (Feb 2026)

Subjek

Winds — United States — Measurement — Quality cont
Anemometry — United States — Case studies
Climatology — Statistical methods

Info Detail Spesifik

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Pernyataan Tanggungjawab

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Versi lain/terkait

Lampiran Berkas

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