학술논문

The Influence of the Wind Field and Stratification on the Nocturnal Surface Air Temperature over Modest Topography.
Document Type
Article
Source
Journal of Applied Meteorology & Climatology. Sep2021, Vol. 60 Issue 9, p1347-1360. 14p. 2 Charts, 11 Graphs.
Subject
*ATMOSPHERIC temperature
*SURFACE temperature
*TOPOGRAPHY
*WIND speed
*SPATIAL variation
Language
ISSN
1558-8424
Abstract
Our study examines the horizontal variation of the nocturnal surface air temperature by analyzing measurements from four contrasting networks of stations with generally modest topography. The horizontal extent of the networks ranges from 1 to 23 km. For each network, we investigate the general relationship of the horizontal variation of temperature to the wind speed, wind direction, near-surface stratification, and turbulence. As an example, the horizontal variation of temperature generally increases with increasing stratification and decreases with increasing wind speed. However, quantitative details vary significantly between the networks. Needed changes of the observational strategy are discussed. Significance Statement: We analyze nocturnal measurements from four different networks of surface stations over different types of terrain. We concentrate on the spatial variation of the surface air temperature that controls frost damage, fog formation, dispersion of particulates, and the effects of terrain changes on climate. For each network, our study examines the general relationship of the horizontal variation of temperature to the wind speed, wind direction, vertical variation of temperature, and turbulence. We identify important inadequacies of the observations and the need for future more appropriate network design including instrumental needs and choice of sites. [ABSTRACT FROM AUTHOR]