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| Titel |
Observing of entrainment using small UAS |
| VerfasserIn |
S. Martin, J. Bange, F. Beyrich |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068757
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| Zusammenfassung |
| Entrainment processes between the atmospheric boundary layer and the free atmosphere are
important concerning vertical exchange of momentum, energy, water vapor, trace gases and
aerosol. The transition zone between the convectively mixed boundary layer and
the stably stratified free atmosphere is called the entrainment zone (EZ). The EZ
restrains the domain of turbulence by a temperature inversion and acts as a lid to
pollutants.
Measurement flights of the mini meteorological aerial vehicle (M2AV) of the Technische
Universität Braunschweig were performed in spring 2011 to determine the capability of the
unmanned aerial system (UAS) to measure the structure of the EZ. The campaign took place
at the Meteorological Observatory Lindenberg / Richard-Aßmann-Observatory of
the German Meteorological Service, which is located close to Berlin. Besides the
M2AV flights, standard observations were performed by a 12 m and 99 m tower, a
sodar, ceilometer and radiosondes. A tethered balloon with measurement units at six
different levels was operated especially for this campaign. The measurements of
these systems were used to determine the inversion layer and to capture its diurnal
cycle.
The talk will be focused on vertical profiles of the M2AV up to the free atmosphere, detailed
analysis of spatial series of w′θ′ at different altitudes and on vertical profiles of
normalized variances of the vertical wind component and the potential temperature. |
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