Taiwan’s heat island effect

Taiwan’s heat island effect

Over the past 8 years, high temperatures over 35 degrees C occurred an average of two months per year.

In Taipei during summer, a rise of 1 degree C in feel-like temperature beyond 31.5 degrees C, the death rate rises 5.1%.

A rise of 1 degree C in feel-like temperature beyond 30.7 degrees C, the death rate of cardiovascular disease sufferers rises 3.5%.

A rise of 1 degree C in feel-like temperature beyond 31.4 degrees C, the death rate of respiratory system disease sufferers increases 12.5%.

A rise in ambient temperature of 2.3 degrees C in Taiwan raises the risk of suicides by 7.8%.

Taipei is affected by the urban heat island effect, the basin effect, the Pacific high pressure, and the greenhouse effect.  In future, days of high temperature of 40 degree C at noon will be very frequent.

The urban heat island effect in Taipei has raised the night time temperature.  The tropical night effect is now obvious.

Taipei’s lowest daily ambient temperature is at 5 am.  Between 1971 and 1980, the daily average temperature was 25.6 degrees C.  From 2000 to 2010, the average daily temperature has been 27.3 degrees C.

Each rise of 1 degree C in ambient temperature on Taiwan reduces agricultural productivity by 3.76%.

Each rise of 1 degree C in temperature due to the urban heat island effect raises the suicidal death rate of of seniors by 5.49%.

Each rise of 1 degree C in outdoor temperature increases electric power use during the summer peak season by 6%.

When the ambient temperature is over 33.5 degrees C, the number of visit to the hospital emergency room by seniors increase 11%.

The urban heat island effect also affects depression.  In areas when the average temperature is 23 degrees C, each rise of 1 degree C in ambient temperature increases the depression rate by 7%.

Taiwan’s weather authorities define 35.2 degrees C as high temperature in Taipei, 34 degrees C as high temperature in Taichung, and 33.3 degrees C as high temperature in Kaohsiung.

In Taipei on high temperature days, the PM 2.5 concentration is 43.8% higher than average temperature days.  In Kaohsiung city on high temperature days, the concentration of PM 2.5 is 91.7% higher than normal temperature days, and in Taichung on high temperature days, the concentration of PM 2.5 is 115% higher than normal temperature days.

Analysis of the causes of death between 1994 and 2003 shows that the temperatures for comfortable living with the minimum death rate are between 26 and 27 degrees C.  When the ambient temperature is beyond 31 degrees C, each rise of 1 degree C in temperature increases the death rate by 5%.

Each rise of 1 degree C in the body’s feel-like temperature of cardiovascular patients increases their death rate by 3.5%.

Each rise of 1 degree C in the body’s feel-like temperature of respiratory disease patients beyond 31.4 degrees C increases their death rate by 12.5%.

Taiwan’s lowest depression risk temperature range is between 20 – 23 degrees
C.  In arease with an average temperature of 23 degrees C, each rise of 1 degree C in temperature raises depression by 7%.

 

 

 

 

 

 

 

 

About masterchensays

Victor Chen, herbalist, alternative healthcare lecturer, Chinese affairs analyst, retired journalist
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