[1]ZHANG Kexin,DONG Xiaogang,LIAO Kongtai,et al.Characteristics of Seasonal Changes in Extreme Temperature and Their Relativity with ENSO in the Yellow River Basin from 1960 to 2017[J].Research of Soil and Water Conservation,2020,27(02):185-192.
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Characteristics of Seasonal Changes in Extreme Temperature and Their Relativity with ENSO in the Yellow River Basin from 1960 to 2017
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
185-192
Column:
Public date:
2020-03-30
- Title:
- Characteristics of Seasonal Changes in Extreme Temperature and Their Relativity with ENSO in the Yellow River Basin from 1960 to 2017
- CLC:
- P467
- DOI:
- -
- Abstract:
- To have a better view of climate changes and trends, the primary objectives are to investigate the characteristics of seasonal changes in extreme temperature in Yellow River basin. Based on the daily mean temperature data of 66 meteorological stations in the Yellow River Basin during the period 1960—2017 and using the methods of climate tendency rate, Mann-Kendall and cross-wavelet and wavelet coherence techniques, the characteristics of seasonal changes in extreme temperatures and the relationship between the extreme temperature and the ENSO were analyzed. The results indicate that extreme high temperature days in each season presented the significantly rising trend, especially increased with larger scales after the middle of the 1990s, but those was contrary to extreme low temperature days, which decreased with larger scales after the middle of 1990s in spring and summer; the mutation of extreme high temperature days in spring, summer, autumn, and winter increased in 2000, 2001, 1994 and 1995, respectively, but those of extreme low temperature days decreased in 2006, 2015, 1988 and 1990, respectively; The response of extreme temperature days to global warming was earlier in autumn and winter than that in spring and summer, which indicated that the significant change of extreme temperature days took place in winter firstly; The response of extreme temperature days to global warming was earlier in autumn and winter than those in spring and summer; the change of extreme temperature days will exert some effect on the Yellow River Basin. Furthermore, the continuous wavelets transform analysis presented significant periodic variations with periods of 2～4 years, 4～6 years in the extreme temperature. The increase of extreme high temperature days will add the pressure of preventing fire of forest and grasslands in the upper reaches of the Yellow River Basin. The decrease of extreme low temperature days will reduce the occurrence frequency of freeze damage, but it will be a potential threat to protection of ecology environment and agriculture production.
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Last Update:
2020-02-25