Abstract
Marine mixed layer height (MLH) detection using a ship-borne coherent Doppler wind lidar (CDWL) based on a constant turbulent kinetic energy dissipation rate (TKEDR) threshold is realized and experimentally demonstrated. The MLH can be retrieved from the TKEDR estimated by the CDWL via setting an appropriate threshold. Here, the value of threshold is determined by a reference MLH retrieved from aerosol backscattered signal. The threshold of 10−4 m2 s−3 is found to be applicable in retrieving both inland and marine MLHs. In the experiments, to validate the reliability of the constant threshold, the MLH diurnal cycles at inland and marine sites are retrieved by using a ground-based CDWL. The MLH retrieval result at the marine site shows good agreement with radiosonde-derived MLH. After that, by using a ship-borne CDWL, the marine MLH along the ship’s route in South China Sea is successfully detected in real time.
Highlights
Academic Editor: Ali KhenchafThe mixed layer (ML), known as the convective boundary layer, is the lower part of the atmospheric boundary layer (ABL) which is directly influenced by the Earth’s surface and responds to surface forcing with a timescale of about an hour [1]
The optimum turbulent kinetic energy dissipation rate (TKEDR) threshold for retrieving inland and marine Mixed layer height (MLH) is determined as a constant value of 10−4−4m2 2s−−33
The reliability inland and marine MLHs is determined as a constant value of 10 m s
Summary
The mixed layer (ML), known as the convective boundary layer, is the lower part of the atmospheric boundary layer (ABL) which is directly influenced by the Earth’s surface and responds to surface forcing with a timescale of about an hour [1]. The material mixing in the ML is driven by convective turbulence; the MLH can be retrieved from turbulence intensity, which is usually characterized by the vertical wind velocity variance or turbulent kinetic energy dissipation rate (TKEDR). A remote-sensing technique is developed to measure the data profile from the ground to stratosphere using sodars, radars, or lidars [7,8]. MLH because there is usually a decrease in turbulence intensity profile at the ML top [16] Based on this characteristic, a threshold method with rapidity and low uncertainty is deBased on this characteristic, a threshold method with rapidity and low uncertainty is veloped. Note that the value of variance threshold varies from below the MLH and vice versa. The value is found to vary with is optimum a strongfor convective tive turbulence intensity.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
