Parameterization of urban sub-grid scale processes in global atmospheric chemistry models
Includes bibliographical references (p. 29-30).
| 其他作者: | |
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| 语言: | eng |
| 出版: |
MIT Joint Program on the Science and Policy of Global Change
2003
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| 主题: | |
| 在线阅读: | http://mit.edu/globalchange/www/abstracts.html#a20 http://hdl.handle.net/1721.1/3629 |
| _version_ | 1826217646840872960 |
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| author2 | Calbó, Josep. |
| author_facet | Calbó, Josep. |
| collection | MIT |
| description | Includes bibliographical references (p. 29-30). |
| first_indexed | 2024-09-23T17:07:00Z |
| id | mit-1721.1/3629 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T17:07:00Z |
| publishDate | 2003 |
| publisher | MIT Joint Program on the Science and Policy of Global Change |
| record_format | dspace |
| spelling | mit-1721.1/36292019-04-10T09:30:10Z Parameterization of urban sub-grid scale processes in global atmospheric chemistry models Calbó, Josep. Pan, Wen Wei. Webster, Mort David. Prinn, Ronald G. McRae, Gregory J. QC981.8.C5 M58 no.20 Includes bibliographical references (p. 29-30). Abstract in HTML and technical report in HTML and PDF available on the Massachusetts Institute of Technology Joint Program on the Science and Policy of Global Change website (http://mit.edu/globalchange/www/). We have derived a parameterization consisting of a set of analytical expressions that approximate the predictions by the CIT Urban Airshed Model for the net export to the environment (i.e., effective emissions) of several chemical species, as functions of fourteen input parameters. For each species, effective emissions are a function of actual urban emissions of this and other species and of other urban domain properties such as meteorology. Effective emissions may be "aged" emissions of primary pollutants or actual production of secondary pollutants. To develop the parameterization we have applied the probabilistic collocation method, which uses the probability density functions of the inputs to generate a set of orthogonal polynomials. These polynomials are then used as the basis for a polynomial chaos expansion that approximates the actual response of the CIT model to its inputs. We assume that seasonal variations can be represented by sinusoidal functions. The parameterization provides a computationally very efficient simulation of the actual model behavior. We have compared the outputs of the parameterization with the outputs of the CIT model, and we conclude that it gives a quite good approximation for effective emissions, at least in the regions of highest probability of the input parameters. This parameterization is applicable to detailed uncertainty and sensitivity analyses and enables computationally efficient inclusion of urban-scale processes as sub-grid scale phenomena in global-scale models. Funded by the Comissió Interdepartmental de Recerca i Innovació Tecnològica (CIRIT), Catalunya, Spain and supported by the U.S. National Science Foundation. 95-23616. 2003-10-24T14:57:37Z 2003-10-24T14:57:37Z 1997-07 no. 20 http://mit.edu/globalchange/www/abstracts.html#a20 http://hdl.handle.net/1721.1/3629 eng Report no. 20 30 p. 385206 bytes application/pdf application/pdf MIT Joint Program on the Science and Policy of Global Change |
| spellingShingle | QC981.8.C5 M58 no.20 Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title | Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title_full | Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title_fullStr | Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title_full_unstemmed | Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title_short | Parameterization of urban sub-grid scale processes in global atmospheric chemistry models |
| title_sort | parameterization of urban sub grid scale processes in global atmospheric chemistry models |
| topic | QC981.8.C5 M58 no.20 |
| url | http://mit.edu/globalchange/www/abstracts.html#a20 http://hdl.handle.net/1721.1/3629 |