Measuring High-Frequency Humidity, Temperature and Radio Refractive Index in the Surface Layer
| Autor: | Reginald J. Hill, J. T. Priestley |
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| Rok vydání: | 1985 |
| Předmět: | |
| Zdroj: | Journal of Atmospheric and Oceanic Technology. 2:233-251 |
| ISSN: | 1520-0426 0739-0572 |
| DOI: | 10.1175/1520-0426(1985)002<0233:mhfhta>2.0.co;2 |
| Popis: | Three different instrument systems are compared in their ability to either directly or indirectly measure humidity, temperature, and refractive-index fluctuations. Each system consists of a basic instrument—a Lyman-α hygrometer, an infrared absorption hygrometer or a radio refractometer—configured with its own fine-wire resistance thermometer. All measurements were obtained at a height of 5.2 m in the atmospheric surface layer. We present time series from these instruments, power spectra of humidity, temperature, and radio refractive index, as well as temperature-humidity cospectra, phase spectra, and coherence spectra. The temperature and humidity are either very well correlated or anticorrelated. The temperature-humidity cospectra have the inertial subrange power law up to wavenumbers where instrumental effects interfere. The refractive-index structure parameters calculated from the humidity and temperature fluctuations measured by the Lyman-α and its fine wire agree substantially with the stru... |
| Databáze: | OpenAIRE |
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