Related Experiment Video
Updated: Mar 30, 2026
09:55
Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
Published on: December 12, 2013
9.3K
Retrieving mesopause temperature and line-of-sight wind from full-diurnal-cycle Na lidar observations
Applied Optics
|November 13, 2015
Summary
Colorado State University
Area of Science:
- Atmospheric science
- Geophysics
- Aeronomy
Background:
- The Colorado State University (CSU) narrowband sodium (Na) lidar has been a pioneering instrument for mesopause region temperature measurements since 1985.
- Upgrades have enabled measurements of temperature, wind, and continuous 24-hour observations, even under sunlit conditions.
Purpose of the Study:
- To detail the assumptions and procedures for retrieving mesopause region temperatures, line-of-sight winds, and sodium densities using the CSU narrowband Na lidar.
- To discuss the impact of the Hanle effect and pulsed laser line shape on retrieval accuracy.
Main Methods:
- Utilizing narrowband sodium (Na) lidar signals collected during both day and night.
- Applying specific algorithms to retrieve temperature, wind, and sodium density profiles.
- Analyzing the influence of physical effects like the Hanle effect on data accuracy.
Main Results:
- Successful retrieval of mesopause region temperature, wind, and sodium density data from CSU's narrowband Na lidar.
- Quantification of the impact of the Hanle effect and laser line shape on retrieval accuracy.
Conclusions:
- The CSU narrowband Na lidar provides valuable data for mesopause region studies.
- Understanding and accounting for the Hanle effect and laser line shape are crucial for accurate temperature and wind retrievals.
Related Concept Videos
01:14Temperature Measurement Sites
4.0K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
4.0K
01:18Boundary Layer Characteristics
820
When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
820
01:28Magnetostatic Boundary Conditions
1.8K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.8K
01:43Thermosensation
35.4K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
35.4K
01:19Magnetic Declination
640
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
640
01:16Flame Photometry: Lab
1.2K
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
1.2K