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A modelling study of the heat island...

Liang, Jenny (Zhiyun).

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A modelling study of the heat island formation and its potential effects on air pollution and meteorology.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	A modelling study of the heat island formation and its potential effects on air pollution and meteorology./
作者:	Liang, Jenny (Zhiyun).
面頁冊數:	177 p.
附註:	Source: Masters Abstracts International, Volume: 46-01, page: 0285.
Contained By:	Masters Abstracts International46-01.
標題:	Atmospheric Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR29577
ISBN:	9780494295779

A modelling study of the heat island formation and its potential effects on air pollution and meteorology.
Liang, Jenny (Zhiyun).

A modelling study of the heat island formation and its potential effects on air pollution and meteorology. - 177 p.

Source: Masters Abstracts International, Volume: 46-01, page: 0285.

Thesis (M.Sc.)--York University (Canada), 2007.

The urban heat island is defined as the air temperature increase relative to non-urban regions as well as the physical and radiative properties of the urban environment. It is caused by the release of anthropogenic heat into the atmosphere. The urban heat island may significantly influence local air quality, weather and the climate. In order to establish and to implement air quality regulations for air pollutants, it is essential to understand the physical and chemical processes associated with the heat island formation. In this study, population data, nighttime light emissions, and annual energy usage data were used to estimate the anthropogenic heat flux that was introduced into the MC2AQ model as a lower boundary condition for the prognostic equations for surface temperature. As a result of this study, MC2AQ allowed us to simulate an inversion layer formation and heat island formation, and to study the effects of the urban heat island on gas phase chemistry and aerosol chemistry.

ISBN: 9780494295779Subjects--Topical Terms:

1019179
Atmospheric Sciences.

A modelling study of the heat island formation and its potential effects on air pollution and meteorology.
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245 1 2 $a A modelling study of the heat island formation and its potential effects on air pollution and meteorology.
300 $a 177 p.
500 $a Source: Masters Abstracts International, Volume: 46-01, page: 0285.
502 $a Thesis (M.Sc.)--York University (Canada), 2007.
520 $a The urban heat island is defined as the air temperature increase relative to non-urban regions as well as the physical and radiative properties of the urban environment. It is caused by the release of anthropogenic heat into the atmosphere. The urban heat island may significantly influence local air quality, weather and the climate. In order to establish and to implement air quality regulations for air pollutants, it is essential to understand the physical and chemical processes associated with the heat island formation. In this study, population data, nighttime light emissions, and annual energy usage data were used to estimate the anthropogenic heat flux that was introduced into the MC2AQ model as a lower boundary condition for the prognostic equations for surface temperature. As a result of this study, MC2AQ allowed us to simulate an inversion layer formation and heat island formation, and to study the effects of the urban heat island on gas phase chemistry and aerosol chemistry.
520 $a Coupled with a Geographical Information System (GIS), the model simulates how the anthropogenic heating contributes to the formation of urban heat islands. Furthermore, the model simulates how anthropogenic heating may affect temperature, vertical diffusion, relative humidity, pollutants' concentrations and distributions. It is found that an inversion layer significantly affects the distribution of air pollutants. Case studies show that in the presence of anthropogenic heating, the urban surface temperature is 2.5 degrees higher than the rural surface temperature in New York City. Results show that anthropogenic heating also promoted vertical mixing, and thus decreased NOx concentration and increased ozone concentration at ground level. The comparison of observation data with the model simulation results confirms that the modified MC2AQ model introduces a tendency to reduce differences between the model and measurements in nighttime surface temperatures and ozone concentrations.
520 $a The sensitivity tests of anthropogenic heating show that a 50% increase of the anthropogenic heat flux slightly improves the forecast accuracy of the surface air temperature, but has no significant impact on surface ozone concentration prediction in the whole domain. In the case studies of Detroit, Toronto, Montreal and New York, the 100% increase of anthropogenic heat flux promotes vertical mixing, and a tendency to reduce differences between the model and measurements.
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