Changes in climatic extremes over mainland China

Ren, Guoyu; Guan, Zhaoyong; Shao, Xuemei; Gong, D.

doi:10.3354/cr01067

Cited by 31 publications

(20 citation statements)

References 19 publications

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“…These values indicate that heat wave events are far more frequent in North China than in the other modelled regions. This result is consistent with previous investigations based on meteorological observations (Zhai and Pan, ; Ren et al , ). The model successfully simulates the spatial distribution of HWDI values, for example, relatively high HDWI values are simulated in North Xinjiang and North and Northeast China, where observed HDWI values are also high (Figure (e)).…”

Section: Validation Of Model Performancesupporting

confidence: 94%

Evaluation of extreme climate events using a regional climate model for China

Kang

2014

Intl Journal of Climatology

107

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Extreme climate events over China at the end of the 21st century (2080–2099) are investigated using the regional climate model RegCM4. Model performance is validated through comparison between observations and simulations over the period 1985–2005. The results show that RegCM4 can satisfactorily reproduce the spatial distribution of extreme climate events over China. The model simulates temperature extremes more accurately than precipitation. Under the RCP8.5 (high emission) scenario, the number of frost days decreases, and both the heat wave duration index and the growing season length increase dramatically towards the end of the 21st century. Changes in extreme temperature become increasingly pronounced from South to North China, with the most significant changes occurring on the Tibetan Plateau (TP). The proportion of heavy precipitation generally increases, except on the southern TP. The number of very heavy precipitation days increases by 25–50% in Northwest and East China. In winter, the number of consecutive dry days (CDD) decreases in North China and increases in South China. The greatest increases in CDD are found in June, July and August (JJA) in Southwest China. In a future that follows this scenario, drought events may be aggravated in Southwest China, and decrease in North China. In contrast, when repeating these projections under the assumption of the RCP4.5 scenario for emissions, the frequency of extreme climate events is reduced. These results suggest that reductions in greenhouse gas emissions may mitigate the effects of climate change over the coming decades.

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Section: Validation Of Model Performancesupporting

confidence: 94%

Evaluation of extreme climate events using a regional climate model for China

Kang

2014

Intl Journal of Climatology

107

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“…In contrast, it makes a relatively limited contribution in dry northwestern China, explaining 30% or less of hot extremes. In addition to land-atmosphere coupling, hot extremes over China can also be affected by other factors such as SST anomalies [16][17][18][19]42]. In particular over dry northwestern China, other factors may play a more important role in the occurrence of hot extremes than land-atmosphere coupling does.…”

Section: Resultsmentioning

confidence: 99%

“…The occurrence of hot extremes over China has been previously attributed to large-scale atmospheric circulation anomalies, SST anomalies, global warming and urbanization effects [16][17][18][19]. However, the role of land-atmosphere interactions for the occurrence of hot extremes over China is not yet well understood.…”

Section: Discussionmentioning

confidence: 99%

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Land-atmosphere coupling amplifies hot extremes over China

Zhang

2011

Chin. Sci. Bull.

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Climate extremes, such as extreme hot temperatures and heat waves, can have dramatic societal, economic, and ecological consequences. China has experienced remarkable interannual and decadal changes in hot extremes during the last several decades. However, the underlying mechanisms responsible for changes in the hot extremes over China have not been clearly identified. In this study, we investigate the role of land-atmosphere coupling for hot days and heat waves during summer over China using two long-term Weather Research and Forecasting model simulations with and without interactive soil moisture. Results indicate that land-atmosphere coupling mainly amplifies hot extremes over China. In particular, significant amplifying effects appear over most of eastern and southwestern China. Over these areas, land-atmosphere coupling generally accounts for 30%-70% of the numbers of hot days and heat waves. This study highlights the critical importance of land-atmosphere interactions for the occurrence of hot extremes over China. land-atmosphere coupling, hot extremes, regional climate modeling Citation:Zhang J Y, Wu L Y. Land-atmosphere coupling amplifies hot extremes over China.

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“…The impacts of climate change vary between geographically diverse regions; therefore, variations in extreme weather and climate events display complicated patterns and regional characteristics (Ren et al ., ). For example, many regions have detected an increase in extreme precipitation over recent decades, e.g.…”

Section: Introductionmentioning

confidence: 99%

Variability of precipitation extremes and dryness/wetness over the southeast coastal region of China, 1960–2014

Ren

Chen

et al. 2017

Intl Journal of Climatology

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The spatio‐temporal variability of precipitation extremes was investigated over the southeast coastal region of China, based on daily precipitation records from 73 meteorological stations for the period of 1960–2014. The standardized precipitation index (SPI), rotated empirical orthogonal function (REOF), and wavelet analysis methods were used to assess the characteristics of dryness/wetness patterns, as well as their correlations with the El Niño/Southern Oscillation (ENSO). Most of the extreme indices exhibited increasing trends at the regional scale over the past 55 years and generally had larger magnitudes than in other regions, with heavy precipitation that was more concentrated in time. The annual total wet day precipitation (PRCPTOT), total precipitation on very wet days (R95p), and total precipitation on extremely wet days (R99p) displayed sharp increases, with magnitudes of 22.60 (P = 0.33), 21.50 (P = 0.02) and 7.80 (P = 0.06) mm decade−1, respectively. In contrast, the regional averaged maximum consecutive wet days (CWD) decreased by −0.10 days decade−1 (P = 0.48). The stations with sharp increases in extreme heavy precipitation were mainly located in the north and coastal areas. In addition, three dominant dryness/wetness patterns (REOFs) corresponding to different climatic partitions were identified. With regard to the time coefficients (PCs) of each REOF, no significant trend in PC1 was detected, while an increasing trend (P < 0.001) in PC2 and decreasing trend (P < 0.001) in PC3 were found. The evolution of dryness/wetness occurred over a 4‐ to 12‐year period in the first three REOFs, and their PCs all had significant positive correlations with ENSO at a 12‐month lag time. This study suggests that the risks of heavy precipitation and flooding are likely to increase in southeast China, particularly in the northern and coastal areas, and extreme events may be strengthened in the southern subtropical zone during certain seasons.

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Changes in climatic extremes over mainland China

Cited by 31 publications

References 19 publications

Evaluation of extreme climate events using a regional climate model for China

Evaluation of extreme climate events using a regional climate model for China

Land-atmosphere coupling amplifies hot extremes over China

Variability of precipitation extremes and dryness/wetness over the southeast coastal region of China, 1960–2014

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