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Nudging Technique for Scale Bridging in Air Quality/Climate Atmospheric Composition Modelling : Volume 11, Issue 6 (20/06/2011)

By Maurizi, A.

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Book Id: WPLBN0003986032
Format Type: PDF Article :
File Size: Pages 23
Reproduction Date: 2015

Title: Nudging Technique for Scale Bridging in Air Quality/Climate Atmospheric Composition Modelling : Volume 11, Issue 6 (20/06/2011)  
Author: Maurizi, A.
Volume: Vol. 11, Issue 6
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Tampieri, F., Russo, F., D'isidoro, M., & Maurizi, A. (2011). Nudging Technique for Scale Bridging in Air Quality/Climate Atmospheric Composition Modelling : Volume 11, Issue 6 (20/06/2011). Retrieved from

Description: Istituto di Scienze dell'Atmosfera e del Clima, Consiglio Nazionale delle Ricerche, 40129 Bologna, Italy. The interaction between air quality and climate involves dynamical scales that cover an immensely wide range. Bridging these scales in numerical simulations is fundamental in studies devoted to megacity/hot-spot impacts on climate. The nudging technique is proposed as a bridging method that can couple different models at different scales.

Here, nudging is used to force low resolution chemical composition models using a high resolution run on critical areas. A one-year numerical experiment focused on the Po Valley hot spot is performed using the BOLCHEM model to asses the method.

The results show that the model response is stable to perturbation induced by the nudging and that, if a high resolution run is taken as a reference, there is an increase in model skills of low resolution run when the technique is applied. This improvement depends on the species and the season. The effect spreads outside the forcing area and remains noticeable over an extension about 9 times larger.

Nudging technique for scale bridging in air quality/climate atmospheric composition modelling

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