Elucidation of spatiotemporal structures from high-resolution blowing-snow observations

Systematic observations were conducted to investigate the spatiotemporal structures of blowing snow. Along a line perpendicular to the dominant wind direction on the lee side of a flat field, 15 snow particle counters (SPCs) and ultrasonic anemometers (USAs) were placed 1.5 m apart. Data were record...

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Bibliographic Details
Published in:The cryosphere 2024-10, Vol.18 (10), p.4775-4786
Main Authors: Nishimura, Kouichi, Nemoto, Masaki, Ito, Yoichi, Omiya, Satoru, Shimoyama, Kou, Niiya, Hirofumi
Format: Article
Language:English
Subjects:
Blowing snow
Blowing time
Climate change
Mass flux
Meandering
Nonuniformity
Particle counters
Particle size
Quadrants
Radiation counters
Sensors
Snow
Spatiotemporal data
Wind
Wind direction
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Summary:Systematic observations were conducted to investigate the spatiotemporal structures of blowing snow. Along a line perpendicular to the dominant wind direction on the lee side of a flat field, 15 snow particle counters (SPCs) and ultrasonic anemometers (USAs) were placed 1.5 m apart. Data were recorded at high frequencies of 100 kHz for SPCs and 1 kHz for USAs. The horizontal mass flux distributions, representing the spatiotemporal variability of blowing snow, exhibited non-uniformity in both time and space and manifested periodic changes akin to snow waves. Additionally, the presence of “snow snakes”, meandering near the snow surface, was observed. Quadrant analysis revealed predominant snow fluxes in quadrants Q1 (u′>0, w′>0) and Q4 (u′>0, w′
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-18-4775-2024