Real time acquiring method for sea fog thickness and height of low cloud base

Abstract

The invention relates to a real-time acquiring method for sea fog thickness and cloud base height of low clouds. The method fully utilizes data from L wave band secondary wind-detecting radar and digital dropsonde data of an observatory, orderly analyzes distribution characteristics of the temperature and moisture of sea fog and the low clouds in the vertical direction, calculates stability degree conditions and turbulent flow conditions of lower atmosphere when the sea fog and the low clouds exist, makes statistical analysis and concludes the conditions to separate the sea fog and the low clouds, calculates the sea fog thickness and the low clouds height, and acquires the sea fog thickness and the low clouds height. The formed computer software automatically displays the result. The invention provides an effective method for monitoring in real time, namely simultaneously establishing an objective and feasible method for automatically extracting the cloud base height of the low clouds and monitoring the sea fog thickness in real time, has strong implementation, high reliability, and provides effective meteorological data for flight safety above the sea surface, maritime traffic transportation, as well as operations on harbors and costal airports.

Description

technical field [0001] The invention belongs to marine environment monitoring technology, in particular to a method for real-time acquisition of sea fog thickness and low cloud base height. Background technique [0002] When there is sea fog, the horizontal visibility is less than 1,000 meters, seriously affecting maritime transportation, seaports and coastal airport operations. Studies have shown that the thicker the vertical thickness of the sea fog, the thicker the fog, the worse the visibility, and the harder it is to dissipate. Therefore, sea fog thickness is an important content of sea fog monitoring. However, there is no effective method for real-time monitoring of sea fog thickness. [0003] In addition, over the sea at mid-latitudes, low clouds often appear. Because the height of the cloud base of low clouds (height from the sea surface) is generally several hundred meters, it is very difficult for the aircraft to take off and land. Therefore, it is necessary to...

AI Technical Summary

Problems solved by technology

[0002] When there is sea fog, the horizontal visibility is less than 1000 meters, which seriously affects the operations of marine transportation, seaports and coastal airports

However, there is no real-time automatic extraction of the height of low cloud cloud base by using the data of L-band secondary wind measuring radar and digital electronic radiosonde (hereinafter referred to as L-band radar data)

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