Publication

Planetary Boundary Layer ozone fluxes from combined airborne, ground based lidars and Wind profilers measurements

Hubert van den Bergh, Valentin Simeonov, Bertrand Calpini
1999
Journal Articles

Abstract

Different remote sensing techniques have been used for the analysis of the air pollution in the Milan area. Results and intercomparisons from two lidars are presented, obtained from a ground based and an airborne instrument. Combining them with range resolved wind measurement, horizontal ozone fluxes are obtained, showing a strong vertical stratification of different air masses from different origins.

Official source

https://infoscience.epfl.ch/entities/publication/da263a15-38d8-4d15-bd56-0027b3b14c08

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Hubert van den Bergh, Valentin Simeonov, Bertrand Calpini
1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/da263a15-38d8-4d15-bd56-0027b3b14c08

About this result

Related concepts (21)

Ocean stratification

Ocean stratification is the natural separation of an ocean's water into horizontal layers by density, which is generally stable because warm water floats on top of cold water, and heating is mostly from the sun, which reinforces that arrangement. Stratification is reduced by wind-forced mechanical mixing, but reinforced by convection (warm water rising, cold water sinking). Stratification occurs in all ocean basins and also in other water bodies.

Pycnocline

A pycnocline is the cline or layer where the density gradient (∂ρ/∂z) is greatest within a body of water. An ocean current is generated by the forces such as breaking waves, temperature and salinity differences, wind, Coriolis effect, and tides caused by the gravitational pull of celestial bodies. In addition, the physical properties in a pycnocline driven by density gradients also affect the flows and vertical profiles in the ocean. These changes can be connected to the transport of heat, salt, and nutrients through the ocean, and the pycnocline diffusion controls upwelling.

General circulation model

A general circulation model (GCM) is a type of climate model. It employs a mathematical model of the general circulation of a planetary atmosphere or ocean. It uses the Navier–Stokes equations on a rotating sphere with thermodynamic terms for various energy sources (radiation, latent heat). These equations are the basis for computer programs used to simulate the Earth's atmosphere or oceans. Atmospheric and oceanic GCMs (AGCM and OGCM) are key components along with sea ice and land-surface components.

Related publications (1)

Planetary Boundary Layer ozone fluxes from combined airborne, ground based lidars and Wind profilers measurements

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