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Transient Residence and Exposure Times : Volume 2, Issue 1 (09/01/2006)

By Delhez, E. J. M.

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Book Id: WPLBN0004020284
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Transient Residence and Exposure Times : Volume 2, Issue 1 (09/01/2006)  
Author: Delhez, E. J. M.
Volume: Vol. 2, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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M. Delhe, E. J. (2006). Transient Residence and Exposure Times : Volume 2, Issue 1 (09/01/2006). Retrieved from

Description: University of Liège, Mathematical Methods and Modelling, Belgium. The residence time measures the time spent by a water parcel or a pollutant in a given water body and is therefore widely used in environmental studies. The adjoint method introduced by Delhez et al. (2004) to compute this diagnostic is revised here to take into account the effect of the initialization and of the boundary conditions.

In addition to the equation for the mean residence time, it is suggested to solve a simple advection-diffusion problem to quantify the effect of the initialization and clarify the interpretation of the results.

Using the two same equations but with modified boundary conditions, the method can also be used to quantify the accumulated time spent by water/tracer parcels in a control domain. This diagnostic is called exposure time.

Analytical and realistic model results are used to illustrate the concepts.

Transient residence and exposure times


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