To quantify the energy balance above a lysimeter without disturbance of the measured air volume itself, the applicability of an acoustic-meteorological measurement method is numerically investigated. Several sound paths between transmitters and receivers around the lysimeter border an air volume (‚acoustic chamber’) to determine the interaction between the ground surface and the environment with remote sensing. This study is focused on the sensitivity of the acoustically derived air temperature and wind vector values. To describe the uncertainty of these quantities outgoing from the uncertainty of the acoustic travel time, several effects on the sound propagation, e.g. air absorption, ground reflection, and atmospheric refraction are studied. Based on the wind and temperature data at several height levels, momentum and heat
fluxes can be derived which are important for the energy exchange above the lysimeter surface. First results of the achievable accuracy for the fluxes are summarized in the study using a numerical model of the atmospheric boundary layer.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:16398 |
| Date | 28 September 2017 |
| Creators | Ziemann, A., Raabe, Armin |
| Contributors | Universität Leipzig, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English, German |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | urn:nbn:de:bsz:15-qucosa-212056, qucosa:15000 |
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