[1]LIU Yongting,XU Guanglai,YANG Zhao,et al.Variation of Extreme Temperature and Its Association with Climate Indices in Anhui Province During the Past 56 Years[J].Research of Soil and Water Conservation,2021,28(02):248-255.
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Variation of Extreme Temperature and Its Association with Climate Indices in Anhui Province During the Past 56 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
248-255
Column:
Public date:
2021-02-06
- Title:
- Variation of Extreme Temperature and Its Association with Climate Indices in Anhui Province During the Past 56 Years
- CLC:
- P467
- DOI:
- -
- Abstract:
- The primary objective of this study is to investigate the response of Anhui Province to global warming. Based on month temperature data from 78 stations in Anhui Province, the long term daily temperatures observed during the period from 1960 to 2016 were analyzed, and the spatial and temporal variation characteristics of extreme maximum and minimum temperature were depicted by using the mathematic statistic methods and GIS spatial analysis. The relationship between the extreme temperature and ENSO, PDO and AO were also analyzed by using the cross wavelet and wavelet coherence techniques. The results showed that:(1)The annual extreme maximum and minimum temperature in Anhui Province had been rising over the study period trend. The linear increasing rate of annual extreme minimum temperature(0.37℃/decade)was obviously higher than that of annual extreme maximum temperature(0.12℃/decade).(2)The abrupt change of annual extreme maximum temperature occurred about 15 years later than the extreme minimum temperature abrupt changes(in 2001 and 1986, respectively). Asymmetric changes were observed in the annual extreme maximum and minimum temperature. There was obvious Hurst phenomenon in the future, which showed that the trendy ingredients were existed in Anhui Province during recent 56 years.(3)The spatial and temporal variation distribution of average extreme temperature showed the regional differences in the area, even though the overall change of regional extreme temperature was rising nearly 56 years, yet the temperature in different areas had differences in trend and range.(4)The relationship between the extreme temperature and the three large-climate indices presented significant periodic variations. The in-phase relations between extreme maximum temperature and ENSO, PDO, AO were found in almost all the time-frequency domains, good coherence could be found in the circle of 2.5 to 6 years, 3 to 6 years and 7.5 to 11 years, respectively. The impact of climate indices on extreme minimum temperature mainly occurred in the circle of 3 to 6 years, 4.5 to 5.5 years and 1 to 3.5 years. The rise of extreme minimum temperature played the major role in the warming trend of the whole region, and the extreme temperature and three climate indices had a multi time scale teleconnection phenomenon.
- References:
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Last Update:
2021-02-10