Urban Heat Island Effect Mechanism Quiz

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Questions and Answers

How does the lack of greenery in urban areas contribute to the accumulation of heat in the built environment?

By promoting better air circulation and wind patterns

By decreasing the need for indoor air-conditioning

By increasing the absorption of solar radiation by buildings and roads (correct)

By reducing the energy consumption associated with urban life

What is the main source of anthropogenic heat in urban areas as mentioned in the text?

Indoor air-conditioning (correct)

Open green spaces

Wetlands

Parklands

How do urban greenery and wind patterns relate according to the text?

Urban greenery has no impact on local wind patterns

Urban greenery has a neutral effect on local wind patterns

Urban greenery disrupts local wind patterns

Urban greenery enhances local wind patterns (correct)

Which scale represents the building and public space layer in the context of urban heat islands?

Canopy layer Signup and view all the answers

How does urban metabolism contribute to the urban heat island effect according to the text?

By causing additional waste heat production in cities Signup and view all the answers

In highly developed areas, what factors contribute to the urban heat island effect according to Figure 2?

Urban structure, cover, fabric, and metabolism Signup and view all the answers

What is the major contributor to the artificial temperature increase in cities?

Shortage of vegetation cover Signup and view all the answers

Why do people increasingly move into air-conditioned buildings in cities?

To benefit from indoor thermal comfort Signup and view all the answers

What did Howard compare in the early 19th century regarding urban heat?

Urban heat in London and its countryside Signup and view all the answers

Which season experienced the peak air temperature variation according to Gartland's report?

Winter Signup and view all the answers

What is one consequence of the urban heat island effect on outdoor public spaces?

Threatened usability due to excess heat Signup and view all the answers

How does anthropogenic heat from indoor air-conditioning impact outdoor temperature?

It leads to an ever-increasing outdoor temperature Signup and view all the answers

What is one of the major contributing factors highlighted by Oke (2006b) for the Urban Heat Island (UHI) effect?

Urban structure and fabric Signup and view all the answers

According to Bourbia and Boucheriba (2010), what is a common characteristic of Urban Heat Islands (UHIs) in comparison to their rural surroundings?

They are warmer Signup and view all the answers

Based on the text, when is the urban-rural temperature difference reported to be higher?

At night time Signup and view all the answers

What is one of the consequences mentioned in the text of having more urban development and less greenery in a city?

Increased intensity of UHIs Signup and view all the answers

In what weather conditions is the urban-rural temperature difference higher, according to Gartland (2008)?

Calm and clear weather, at night, and in winter Signup and view all the answers

Why does the warm air stay longer in the built environment during calm weather?

As a result of solar gain on urban surfaces Signup and view all the answers

Study Notes

Heat Accumulation in Urban Areas

Lack of greenery contributes to the urban heat island effect by increasing heat absorption and retention in built structures.
Dense urban structures replace vegetation, which cools the environment through evapotranspiration.

Anthropogenic Heat Sources

Major source of anthropogenic heat in urban areas also includes heat emissions from transportation and energy consumption.

Urban Greenery and Wind Patterns

Urban greenery can enhance wind flow, which mitigates heat accumulation by promoting cooler air movement through urban spaces.

Building and Public Space Layer

The building and public space layer is represented at a micro scale, highlighting local heat islands and specific urban areas.

Urban Metabolism and UHI Effect

Urban metabolism refers to the energy consumption and waste production in cities, contributing to higher temperatures and the urban heat island effect.

Contributing Factors in Developed Areas

In highly developed areas, factors such as high building density, reduced green spaces, and transportation heat increase the urban heat island effect.

Major Temperature Contributor

Artificial temperature increases in cities are primarily driven by energy consumption from buildings and transportation systems.

Air-conditioned Buildings

People gravitate towards air-conditioned buildings in cities for relief from high outdoor temperatures exacerbated by urban heat islands.

Historical Comparisons by Howard

In the early 19th century, Howard compared urban heat levels with surrounding rural temperatures to highlight temperature discrepancies.

Seasonal Variations

According to Gartland's report, summer experiences the peak air temperature variation due to intensified solar heating and reduced nighttime cooling.

Consequences on Outdoor Spaces

Urban heat island effect can render outdoor public spaces uncomfortable, deterring use and reducing recreational opportunities.

Impact of Indoor Air-conditioning

Anthropogenic heat from indoor air-conditioning contributes to increasing outdoor temperatures, complicating efforts to cool urban environments.

Oke's Contribution to UHI

Oke (2006b) emphasizes the role of impervious surfaces, such as roads and buildings, as a major factor in the Urban Heat Island effect.

Urban-rural Temperature Differences

Higher urban-rural temperature differences are reported during summer months due to increased heat absorption in urban materials.

Urban Development and Greenery Consequences

Increased urban development alongside diminished greenery leads to higher temperatures and a less hospitable environment for inhabitants.

Weather Conditions Affecting Temperature Difference

The urban-rural temperature difference is noted to be greater under calm and clear weather conditions, which limits heat dispersion.

Heat Retention During Calm Weather

Warm air remains trapped longer in the built environment during calm weather due to the lack of wind for heat dissipation.

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Description

Test your knowledge on the mechanism of Urban Heat Island (UHI) effect by comparing city centers with rural surroundings. Explore common characteristics of UHI such as temperature differences, weather conditions, and human-made modifications.