| 单词 | weather balloon |
| 释义 | weather balloonnoun Meteorology.sounding balloon. Origin of weather balloonFirst recorded in 1935–40 Words nearby weather balloonweasel word, weasel words, weather, weatherability, weather advisory, weather balloon, weather-beaten, weatherboard, weatherboarding, weather-bound, weathercast Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for weather balloonweather balloon A balloon used to carry instruments aloft to gather meteorological data in the atmosphere. Weather balloons are tracked by radar, Global Positioning System, or theodolites. The balloon itself usually contains devices to measure temperature, pressure and humidity, although it can contain specialized devices to measure the ozone in the ozone layer. Filled with hydrogen or helium gas, weather balloons can reach 35 km (22 mi) in altitude before disintegrating due to the decreased pressure of the lower stratosphere. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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