The Use of Geographically Weighted Regression for the Relationship among Extreme Climate Indices in China

Table 1

Five extreme climate indices calculated based on daily temperature and precipitation data.

Indicator name

Indicator definition (unit: days)

FEP

Let be the daily precipitation on day of year , and let be the calendar day 90th percentile centered on a 5-day window for the base period 1961–1990. Frequency of extreme precipitation (FEP) in year is the annual count of days when .

FWD

Let be the daily maximum temperature on day of year , and let be the calendar day 90th percentile centered on a 5-day window for the base period 1961–1990. Frequency of warm days (FWD) in year is the annual count of days when .

FWN

Let be the daily minimum temperature on day of year , and let be the calendar day 90th percentile centered on a 5-day window for the base period 1961–1990. Frequency of warm nights (FWN) in year is the annual count of days when .

FCD

Let be the daily maximum temperature on day of year , and let be the calendar day 10th percentile centered on a 5-day window for the base period 1961–1990. Frequency of cold days (FCD) in year is the annual count of days when .

FCN

Let be the daily minimum temperature on day of year , and let be the calendar day 10th percentile centered on a 5-day window for the base period 1961–1990. Frequency of cold nights (FCN) in year is the annual count of days when .

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