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Emergence of a Linear Tracer Source from Air Concentration Measurements : Volume 4, Issue 3 (12/05/2004)

By Issartel, J.-p.

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Book Id: WPLBN0003997582
Format Type: PDF Article :
File Size: Pages 56
Reproduction Date: 2015

Title: Emergence of a Linear Tracer Source from Air Concentration Measurements : Volume 4, Issue 3 (12/05/2004)  
Author: Issartel, J.-p.
Volume: Vol. 4, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2004
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Issartel, J. (2004). Emergence of a Linear Tracer Source from Air Concentration Measurements : Volume 4, Issue 3 (12/05/2004). Retrieved from http://community.ebooklibrary.org/


Description
Description: Centre d’Enseignement et de Recherche en Environnement Atmosphérique, unité mixte Ecole Nationale des Ponts et Chaussées – Electricité de France, France Projet CLIME, équipe mixte Institut National de Recherche en. The measurement of atmospheric concentrations by a monitoring network is potentially a useful tool investigated for the identification of the widespread sources of trace species. The paper addresses inversion strategies using base functions multiplicatively deduced from the concentrations adjoint to the measurements. This follows the concept of illumination: the various regions are well, poorly or not seen at all. With ordinary adjoint functions the illumination becomes excessive close to the detectors. This may be corrected by attributing each point of the space time domain a geometric weight. After stating the statistical implications, the choice of this renormalising function is shown to be constrained by an unambiguous formal criterion. The expectable values of the measurements are distinguished from the measurement errors. The entropic nature of the criterion is explained; it amounts to evenly distribute the information between the points organised with their weights as a "known domain" describing the influence of the measurements. Finally the criterion is shown to coincide with the definition of the pure states of quantum statistics, and this interpretation is investigated to describe the influence of the measurement uncertainties on the quality of a source estimate. The theory is illustrated by calculations performed with the experimental source ETEX1.

Summary
Emergence of a linear tracer source from air concentration measurements

 

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