瀬戸内海夏平均3.1℃/ 100年上昇 - heatisland瀬戸内海夏平均3.1 / 100年上昇...

瀬戸内海夏　平均3.1℃/ 100年上昇

Evaluation Method ofHeat Island Intensity

for Coastal Urban Area

Hiroshi MiyazakiFac. of Environmental and Urban Eng.

Kansai University

The Second International Conference onCountermeasures to Urban Heat Islands (SICCUHI)

September 21-23, 2009 in Berkeley, California.

瀬戸内海夏　平均3.1℃/ 100年上昇Table of Contents

1. Motivation

2. Methods

3. Highlight data

4. Summary and future plan

Why I need this proposal.

Evaluating coastal heat island intensity.

瀬戸内海夏　平均3.1℃/ 100年上昇Motivation

1. Early studies

2. Issue of coastal area

3. My proposal

“Heat island intensity” T. R. Oke (1973)

Kobe, Japan. - Where is rural?

Estimate urban influence with sea water temp. ‒ coastal air temp. relation.

瀬戸内海夏　平均3.1℃/ 100年上昇KobeWest Japan

Kobe

Osaka

Sakai

Ama-ga-saki

Suita

- Similar with Berkeley

- Different fromBerkeley

-Where is the rural of Kobe?

Blue: vegetationOrange: urbanYellow: sea

瀬戸内海夏　平均3.1℃/ 100年上昇Motivation

1. Early studies

2. Issue of coastal area

3. My proposal

“Heat island intensity” T. R. Oke (1982)

Kobe, Japan. - Where is rural?

Estimate urban influence with sea water temp. ‒ coastal air temp. relation.

瀬戸内海夏　平均3.1℃/ 100年上昇Subject Area

2. Methods

Tokyo


Osaka

Subject AreaSeto Inland Sea, Japan

2. Methods


Osaka


2. Methods

Borders


Osaka


2. Methods

Osaka

Kobe

Hiroshima

MatsuyamaKita-Kyushu

Major cities


Osaka


2. Methods

Area: 23,203 sq. kilo metersCoast length: 6868 kilo metersSize: 450 kilo meters (west-east)Depth (average): 38 metersPopulation: 30,219,000 (1999)

Properties

瀬戸内海夏　平均3.1℃/ 100年上昇Database

a) Sea water temperature

b) Air temperature

Observed at 2 meters depth

Urban core is OK. But where is rural?

Sea breezes are same?

2000 ‒ 2004 (5 years)

The obs. started 142 points in 1982, up to 229 in 2006

2. Methods




1982 ‒ 2006 (25 years)

2. Methods

Distribution of Sea water temperature




1982 ‒ 2006 (25 years)

2. Methods


SummerDaytime

Left imageshows2000-2004average seawater temp.




1982 ‒ 2006 (25 years)

2. Methods


Maximum (average)

30.0degrees centigrade

Minimum (average)

22.1degrees centigrade


b) Air temperature

Database2. Methods

瀬戸内海夏　平均3.1℃/ 100年上昇3. Highlight data


Size of circles shows size of cities (population)

瀬戸内海夏　平均3.1℃/ 100年上昇4. Summary

- Sea water temperature varied in range of 22.1 ‒ 30.0 degrees centigrade. (Summer)

-Air temperature positively correlated with Sea water temperature.

-UHI intensity values in coastal urban area should take account of sea water temperature.

-This Sea water temperature push up/down The coastal air temperature.

瀬戸内海夏　平均3.1℃/ 100年上昇4. Summary

-Typical air temperature?

-Numerical simulation

-Possibility of using remotely sensed sea water temperature

Future plans

瀬戸内海夏　平均3.1℃/ 100年上昇4. Future plan

Size of circles shows size of cities (population)

瀬戸内海夏　平均3.1℃/ 100年上昇4. Future plan

Location of Kure meteorological station

Image from Google

Hiro

Kure

Kure city, Hiroshima

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瀬戸内海夏平均3.1℃/ 100年上昇 - heatisland瀬戸内海夏平均3.1 / 100年上昇...