Research on Spatial-temporal Variation Characteristics and In fluencing Factors of Annual Maximum Daily Temperature in the Pearl River Basin under the Background of Global Warming
Global warming and severe human activities have induced the non-stationary global climate, leading to increasingly frequent climate events like extreme high temperature, which has seriously threatened human health and socio-economic development. This paper analyzes the spatial-temporal variation cha...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.06.001 |
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| Summary: | Global warming and severe human activities have induced the non-stationary global climate, leading to increasingly frequent climate events like extreme high temperature, which has seriously threatened human health and socio-economic development. This paper analyzes the spatial-temporal variation characteristics of extreme high temperature and quantitatively discusses its influencing factors by the annual maximum daily temperature of 43 meteorological stations in the Pearl River Basin (PRB) from 1960 to 2012 and 74 monthly atmospheric circulation indexes. The results show that:①The annual maximum daily temperature in the PRB showed a significant upward trend, with a significant abrupt change around 2002, a variation period of 4.8 year and oscillation period of 2.0~5.8 years; ②The extreme high temperature of the basin showed an increasing trend from the west to the east, with significant increase in the east PRB; ③Four atmospheric circulation indexes, i.e., the Pacific polar vortex intensity index, the western Pacific subtropical high intensity index, the Asian polar vortex intensity index, and the northern hemisphere polar vortex area index had important driving effect on the extreme high temperature in PRB, while the Asian zonal circulation index and the northern hemisphere subtropical high northern boundary position index presented the lowest relative contribution rate. |
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| ISSN: | 1001-9235 |