High-frequency observation during sand and dust storms at the Qingtu Lake Observatory
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Published:2021-12-14
Issue:12
Volume:13
Page:5819-5830
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ISSN:1866-3516
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Container-title:Earth System Science Data
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language:en
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Short-container-title:Earth Syst. Sci. Data
Author:
Li Xuebo, Huang YongxiangORCID, Wang Guohua, Zheng Xiaojing
Abstract
Abstract. Partially due to global climate change, sand and dust storms (SDSs)
have occurred more and more frequently, yet a detailed measurement of SDS events
at different heights is still lacking. Here we provide a high-frequency
observation from the Qingtu Lake Observation Array (QLOA), China. The wind and
dust information were measured simultaneously at different wall-normal heights
during the SDS process. The datasets span the period from 17 March to 9 June
2016. The wind speed and direction are recorded by a sonic anemometer with a
sampling frequency of 50 Hz, while particulate matter with a diameter of 10 µm or less (PM10) is sampled simultaneously by a dust monitor with a sampling
frequency of 1 Hz. The wall-normal array had 11 sonic anemometers and monitors
spaced logarithmically from z=0.9 to 30 m, where the spacing is
about 2 m between the sonic anemometer and dust monitor at the same
height. Based on its nonstationary feature, an SDS event can be divided
into three stages, i.e., ascending, stabilizing and descending stages, in
which the dynamic mechanism of the wind and dust fields might be different.
This is preliminarily characterized by the classical Fourier power analysis.
Temporal evolution of the scaling exponent from Fourier power analysis
suggests a value slightly below the classical Kolmogorov value of -5/3 for the
three-dimensional homogeneous and isotropic turbulence. During the stabilizing
stage, the collected PM10 shows a very intermittent pattern, which
can be further linked with the burst events in the turbulent atmospheric
boundary layer. This dataset is valuable for a better understanding of
SDS dynamics and is publicly available in a Zenodo repository at https://doi.org/10.5281/zenodo.5034196 (Li et al., 2021a).
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
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