Trends of Monthly Mean of Diurnal Temperature Range (DTR) in Taiwan
Resource
地理學報, 36, 101-116
Journal
地理學報
Journal Issue
36
Pages
101-116
Date Issued
2004-06
Date
2004-06
Author(s)
Lay, L.V.
Chiang, S.H.
Abstract
The diurnal temperature range (DTR)has significantly decreased worldwide since 1950. In this study, the trends of monthly mean of DTR in Taiwan were analyzed. The methods of time series regression model and principal component analysis were used to analyze the daily minimum and maximum temperature data of Taiwan from 1950 to 2000. The trends of monthly mean of DTR in most stations indicated a statistically significant decrease. This was mainly due to faster increasing trends in monthly mean of daily minimum temperatures than those in monthly mean of daily maximum temperatures. The decreasing trends in the monthly mean of DTR in urban areas were larger than those in other areas and much more obvious in autumn. It was found that the trends in the monthly mean of DTR were correlated with human activities and geographical locations.
Subjects
氣溫日較差
日最低氣溫
日最高氣溫
時間序列迴歸模型
主成分分析
月平均
Diurnal temperature range
DTR
Daily minimum temperature
Daily maximum temperature
Time series regression model
Principal component analysis
Monthly mean
Type
journal article
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