Variations of compound precipitation and temperature extremes in China during 1961–2014

Wu, Xuefeng; Hao, Zengchao; Hao, Fang; Zhang, Xuan

doi:10.1016/j.scitotenv.2019.01.366

Cited by 122 publications

(89 citation statements)

References 54 publications

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“…Different from drought, it has increased significantly in Northwest China, southeastern China, South China, and the Yangtze River Valley. However, there exists a negative trend in the number of heat event days in southern North China, where the downtrend is possibly reflected as a regional response to inter-decadal and inter-annual variability 35 , 36 . Also, some other studies suggested that such a unique regional changing feature under global warming is possibly attributed to changes in aerosol, and regional land use and management 1 .…”

Section: Changes In Compound Drought and Heat Eventsmentioning

confidence: 99%

More frequent and widespread persistent compound drought and heat event observed in China

Zhai

2020

Sci Rep

102

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Compound drought and heat event (CDHE) causes severe impacts on agriculture, ecosystem, and human health. Based on daily maximum surface air temperature and meteorological drought composite index data in China, changing features of CDHEs in warm season from 1961 to 2018 is explored at a daily time scale based on a strict and objective definition in this study. Results reveal that CDHEs have occurred more frequently and widely in China, especially since the late 1990s. Notably, such changes are more obvious in Southwest China, eastern Northwest China, northern North China, and the coastal area of southeastern China. A prominent feature is that persistent CDHEs on a daily scale have increased significantly. To better understand climate change of compound extreme events, further studies on the physical mechanism, especially attribution analyses at a regional scale, are urgently needed.

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Section: Changes In Compound Drought and Heat Eventsmentioning

confidence: 99%

More frequent and widespread persistent compound drought and heat event observed in China

Zhai

2020

Sci Rep

102

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“…Western Pacific Subtropical High (WPSH)) and sea surface temperature (SST) anomalies (e.g. EI Ninõ Southern Oscillation) may also contribute to the high magnitude of compound events through the influence on the occurrence of heat wave and/or drought in China (Wu et al 2019). For example, the precipitation (or drought) over southwest China is commonly regulated by persistent SST anomalies and atmospheric conditions (Wang et al 2015) and the Indian Ocean SST anomalies have been shown to contribute to the high temperature extremes over south China during summer (Hu et al 2012).…”

Section: Spatial Distribution Of the Magnitudementioning

confidence: 99%

“…For example, the 2003 dry and hot extreme in Europe led to the death of around 70 000 people(Barriopedro et al 2011). Most of the recent developments on analyzing compound events focused on the frequency or spatial extent(Hao et al 2013, Mazdiyasni and Agha- Kouchak 2015, Sharma and Mujumdar 2017, Wu et al 2019…”

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confidence: 99%

Dry-hot magnitude index: a joint indicator for compound event analysis

Hao

et al. 2019

Environ. Res. Lett.

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Weather and climate extremes, such as droughts and heat waves, have been commonly characterized by different properties, including frequency, duration, and magnitude. The magnitude is among the most important properties that determine the impact of extremes. Compound dry and hot events may cause detrimental impacts on water resources, energy security, crop production and food security, and have been receiving increasing attention in recent years. Although extensive studies have been conducted to investigate the magnitude of individual droughts or hot extremes, evaluation of the magnitude of compound dry and hot events has received limited attention. In this study, we develop a dry-hot magnitude index (DHMI) to characterize the magnitude of compound dry and hot events, using monthly precipitation and daily maximum temperature, which takes into account both dry and hot conditions. The DHMI is used to analyze the spatial and temporal patterns of the magnitude of compound dry and hot events in China during summer (June, July, and August) for the period of 1961-2013. Results show that high magnitudes of compound dry and hot events mainly occur in northeastern and southwestern China, with higher magnitudes mostly observed in recent decades since the 1990s. The proposed magnitude index has potential to be a useful tool for analyzing compound dry and hot events and their impacts.

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“…It is shown that large‐scale climate oscillations, in particular ENSO, play a significant role in the summertime occurrences of compound dry and hot events in tropical regions, particularly over Northern South America, Central and Southern Africa, Southeastern Asia, and Australia (Hao, Hao, Singh & Zhang, 2018). In addition, a few regional studies have investigated the relationship between compound dry and hot events and the ocean‐atmosphere circulation anomalies (Wu et al, 2019) with an aim to develop statistical models for improvement in the predictability of such events (Hao, Hao, Singh, Xia, et al, 2018; Hao et al, 2019; Mishra & Singh, 2011). However, the calculation of drought (or dryness) index in these previous studies is based either on the monthly precipitation anomalies or on the Standardized Precipitation Index (SPI; McKee et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Compound Drought and Heatwaves at a Global Scale: The Role of Natural Climate Variability‐Associated Synoptic Patterns and Land‐Surface Energy Budget Anomalies

2020

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Compound drought and heatwave (CDHW) events have garnered much attention in recent studies. However, thus far, the identification of such events is oversimplified, and their association with natural climate variability is not fully explored. Here, we derive anomalies in the weekly self‐calibrated Palmer Drought Severity Index (sc_PDSI) and daily maximum temperatures to identify CDHW events from 1982 to 2016 over 26 climate regions across the globe. Using a Poisson Generalized Linear Model (GLM), we analyze yearly occurrences of seasonal CDHW events and their association with the warm and cold phases of El Nino Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), and North Atlantic Oscillation (NAO). ENSO exhibits robust association with CDHW events over the Southern Hemisphere during the austral summer and fall, while PDO influences their occurrences over the Western North America in the Northern Hemisphere during the boreal summer, which is supported by the composites of anomalies in the atmospheric circulations and surface energy budget. However, NAO association with CDHW events is relatively weak. The CDHW occurrence over other regions is driven by a combination of these large‐scale natural forcing. Our analyses also highlight that the cooccurrence of weekly to submonthly scale anomalies in the observed temperature and precipitation may not be always aligned between the observations and the reanalysis. Therefore, caution must be exercised while explaining such observed anomalies on the basis of reanalysis‐based circulations and surface energy budget. Overall, our analyses provide a new insight towards concurrent extremes and should help foster research efforts in this area.

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Variations of compound precipitation and temperature extremes in China during 1961–2014

Cited by 122 publications

References 54 publications

More frequent and widespread persistent compound drought and heat event observed in China

More frequent and widespread persistent compound drought and heat event observed in China

Dry-hot magnitude index: a joint indicator for compound event analysis

Compound Drought and Heatwaves at a Global Scale: The Role of Natural Climate Variability‐Associated Synoptic Patterns and Land‐Surface Energy Budget Anomalies

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