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Accueil du site → Doctorat → États-Unis → 1988 → Experimental and numerical investigation of counter radiation variations in an arid urban environment : Phoenix, Arizona

Arizona State University (1988)

Experimental and numerical investigation of counter radiation variations in an arid urban environment : Phoenix, Arizona

Oround, I.M.

Titre : Experimental and numerical investigation of counter radiation variations in an arid urban environment : Phoenix, Arizona

Auteur : Oround, I.M.

Université de soutenance : Arizona State University

Grade : Doctor of Philosophy (PhD) 1988

Résumé
Urbanization in the arid environment of Phoenix, Arizona is observed in this study to produce a significant effect on incoming long-wave radiation from the atmosphere. The excess in counter radiation in metropolitan Phoenix is attributed to the strength of the urban heat island as well as to pollution concentration in the urban atmosphere. This study found that about 40% counter radiation excess is due to the urban heat island, while about 60% counter radiation excess is likely produced by air-pollution effects. The influence of urbanization on observed counter radiation varies with the season, reflecting the strength of the urban heat island and moisture stratification in the boundary layer. Counter radiation effects from the urban atmosphere are well defined for the winter and spring periods. The influence of pollution on counter radiation is derived from a simple algorithm that employs the concept of moisture stratification and nocturnal cooling within the first 200 meters of the boundary layer. A one-dimensional numerical simulation model is incorporated in this study

Mots-clés : ARIZONA ; URBAN AREAS ; LONG WAVE RADIATION ; ENVIRONMENTAL IMPACTS ; AIR POLLUTION ; ARID LANDS ; HEAT TRANSFER ; MOISTURE ; RADIATION EFFECTS ; STRATIFICATION ; ELECTROMAGNETIC RADIATION ; ENERGY TRANSFER ; FEDERAL REGION IX ; NORTH AMERICA ; POLLUTION ; RADIATIONS ; RADIOWAVE RADIATION ; USA

Présentation (SciTech Connect)

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