Frequency of extreme high temperature days in China, 1961–2003

Zhang, F.; Gao, Hao; Cui, Xuefeng

doi:10.1002/wea.136

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…The optimum growth temperature for perennial C3 grass is usually between 17 and 21°C (Raeside et al 2012). However, summer temperatures in many areas of China frequently exceed 30°C (Zhang et al 2008). Thus, heat is becoming one of the major abiotic stress factors restricting the use of cool-season grasses.…”

Section: Introductionmentioning

confidence: 99%

Exogenous hydrogen peroxide enhanced the thermotolerance of Festuca arundinacea and Lolium perenne by increasing the antioxidative capacity

Zhang

et al. 2014

Acta Physiol Plant

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Heat stress is one of the most detrimental environment stresses for plants. Hydrogen peroxide (H 2 O 2 ) is produced quickly in response to various stresses and likely plays a positive role in transmitting stress signal in organisms. This investigation addressed whether an exogenous H 2 O 2 application would affect the heat response of turfgrasses and induce acclimation. Tall fescue (Festuca arundinacea cv. Barlexas) and perennial ryegrass (Lolium perenne cv. Accent), two important cool-season turfgrasses and forages, were sprayed with 10 mM H 2 O 2 before they were treated with heat stress (38/30°C, day/night) and compared with plants maintained at control temperatures (26/15°C, day/night). Prior to the initiation of heat stress, H 2 O 2 pretreatment increased the activities of guaiacol peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR) and glutathionedependent peroxidase (GPX) and the ascorbate and glutathione pool, and it decreased the GSH/GSSG ratio. During the heat stress process, pretreated plants from both grasses exhibited higher turfgrass quality and relative water content, and they experienced lower oxidative damage and H 2 O 2 levels. Moreover, the activities of APX, GR, GPX and glutathione-S-transferase increased significantly in response to H 2 O 2 pretreatment under heat stress. These results suggested that H 2 O 2 most likely participated in the transduction of redox signaling and induced the antioxidative defense system, including various enzymatic and nonenzymatic H 2 O 2 scavengers. The scavengers played important roles in improving the thermotolerance of tall fescue and perennial ryegrasses.

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Section: Introductionmentioning

confidence: 99%

Exogenous hydrogen peroxide enhanced the thermotolerance of Festuca arundinacea and Lolium perenne by increasing the antioxidative capacity

Zhang

et al. 2014

Acta Physiol Plant

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“…Because the patterns of extreme precipitation showed large spatial differences, the detection of the variability and trends of the regional extreme precipitation is very important for the assessment of hydrological consequences, such as flooding and droughts (Unkašević et al 2004;Hundecha and Bárdossy 2005;Rahimzadeh et al 2009), and it is greatly helpful to develop appropriate adaptation and mitigation strategies coping with the negative effects arising from precipitation extremes (Santos et al 2007). This study has become one of the main themes of current climate research, especially global change scenarios (Zhang et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Variability of extreme summer precipitation over Circum-Bohai-Sea region during 1961–2008

Jiang

Wang

et al. 2010

Theor Appl Climatol

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The variability of extreme summer precipitation over Circum-Bohai-Sea region during 1961-2008 was investigated based on the daily precipitation data of 63 meteorological stations using the linear regression method, the non-parametric Mann-Kendall test, and the continuous wavelet transform method. The results showed that there were large spatial differences in the trends of extreme summer precipitation indices. Decreasing trends were found in summer total precipitation, extreme precipitation frequency, intensity and proportion, the maximum consecutive wet days (CWD), and the maximum 1-and 5-day precipitation, and the largest decrease was observed in the central coast area (except CWD), although the trends were not statistically significant at the 5% level at most places. Inversely, the maximum consecutive dry days exhibited non-significant increasing trends. Additionally, the significant 2-4-year periods were detected for eight indices, showing the significant interannual variability of extreme summer precipitation. Overall, the results of this study indicated that in the last 48 years, there was severe water stress over Circum-Bohai-Sea region, especially in the central coast area, which exerted negative effects on economic development and natural ecosystems.

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“…This result is consistent with the projection by the IPCC that the number of frost days and cold events will decrease. It was reported that summer is dominated by western Pacific subtropical highs, especially in south‐eastern China, which is related to the number of days with extreme high temperatures in summer (Zhang et al , ). In this study, however, the trend in the frequency of extreme hot events showed an insignificant increase in the summer, together with less spatial coherence.…”

Section: Discussionmentioning

confidence: 99%

Trends in the daily and extreme temperatures in the Qiantang River basin, China

Xia

Liu

et al. 2014

Intl Journal of Climatology

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Temporal and spatial changes in the annual and seasonal temperatures in a typical basin of the Qiantang River were analysed based on the time series databases of daily temperatures from 14 meteorological stations. Both the Mann-Kendall (MK) trend test and simple linear regression analyses were employed to detect trends in the mean and extreme temperatures. The temperature changes during the three periods of 1960-1990, 1960-2000 and 1960-2006 were investigated at each meteorological station and over the entire basin as an average. The spatial and temporal changes were characterized by significant warming throughout the region, with the minimum temperature (Tn) increasing the most, particularly after 1990. Various percentiles of extreme temperatures, as well as their corresponding frequencies, were chosen to explore the trends of extreme climate change in this region. Linear regression analyses showed a significant warming trend in cold events both on an annual and seasonal basis, especially in the winter. Conversely, the hot events were dominated by an insignificant warming trend (p > 0.05). When comparing the time series before and after 1990, trend shifts were apparent in both the mean and extreme temperatures, particularly in the spring and winter. In addition to the large-scale circulation, regional factors may have influenced the observed climate change in the studied region. Climate change has already influenced human society by, for example, increasing the frequency of haze in the study region. We conclude that the warming here is mainly attributed to changes in the minimum temperature.

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Frequency of extreme high temperature days in China, 1961–2003

Cited by 19 publications

References 13 publications

Exogenous hydrogen peroxide enhanced the thermotolerance of Festuca arundinacea and Lolium perenne by increasing the antioxidative capacity

Exogenous hydrogen peroxide enhanced the thermotolerance of Festuca arundinacea and Lolium perenne by increasing the antioxidative capacity

Variability of extreme summer precipitation over Circum-Bohai-Sea region during 1961–2008

Trends in the daily and extreme temperatures in the Qiantang River basin, China

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