Adaptive estimation of the stable boundary layer height using combined lidar and microwave radiometer observations
A synergetic approach for the estimation of stable boundary-layer height (SBLH) using lidar and microwave radiometer (MWR) data is presented. Vertical variance of the backscatter signal from a ceilometer is used as an indicator of the aerosol stratification in the nocturnal stable boundary-layer. Th...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/91075 |
| Acceso en línea: | https://hdl.handle.net/2117/91075 https://dx.doi.org/10.1109/TGRS.2016.2586298 |
| Access Level: | acceso abierto |
| Palabra clave: | Remote sensing Earth sciences Laser radar Microwave radiometry Adaptive Kalman filtering Signal processing Teledetecció Ciències de la terra Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Teledetecció Àrees temàtiques de la UPC::Enginyeria agroalimentària::Ciències de la terra i de la vida |
| Sumario: | A synergetic approach for the estimation of stable boundary-layer height (SBLH) using lidar and microwave radiometer (MWR) data is presented. Vertical variance of the backscatter signal from a ceilometer is used as an indicator of the aerosol stratification in the nocturnal stable boundary-layer. This hypothesis is supported by a statistical analysis over one month of observations. Thermodynamic information from the MWR-derived potential temperature is incorporated as coarse estimate of the SBLH. Data from the two instruments is adaptively assimilated by using an extended Kalman filter (EKF). A first test of the algorithm is performed by applying it to collocated Vaisala CT25K ceilometer and Humidity-and-Temperature Profiler (HATPRO) MWR data collected during the HD(CP)2 Observational Prototype Experiment (HOPE) campaign at Julich, Germany. The application of the algorithm to different atmospheric scenarios reveals the superior performance of the EKF compared to a non-linear least-squares estimator especially in non-idealized conditions. |
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