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Analysis of Air Pressure Fluctuations and Topsoil Gas Concentrations Within a Scots Pine Forest

Manuel MohrThomas LaemmelMartin MaierDirk Schindler

出版	Universität, 2016
URL	http://books.google.com.hk/books?id=EMBwtAEACAAJ&hl=&source=gbs_api

註釋Abstract: High-precision differential air pressure measurements were conducted in the below-canopy space of a Scots pine forest and in the forest soil to investigate small air pressure fluctuations and their effect on soil gas flux. In addition to air pressure measurements, tracer gas concentration in the soil and airflow characteristics above and below the canopy were measured. Results suggest that air pressure fluctuations in the frequency range of 0.01 Hz-0.1 Hz are strongly dependent on above-canopy wind speed. While amplitudes of the observed air pressure fluctuations (