Extreme drought event of 2009/2010 over southwestern China

Yang, Jing; Gong, Daoyi; Wang, Wenshan; Hu, Miao; Mao, Rui

doi:10.1007/s00703-011-0172-6

Cited by 220 publications

(145 citation statements)

References 18 publications

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“…The rainfall percentage anomaly in some regions was 60.4% less than in previous years [5] and rainfall in February decreased by 49.5% compared to 2000-2009 average precipitation [38]. The continuous drought in the autumn, winter, and spring in some regions of Yunnan and Guizhou provinces was the most serious since 1880, and the extent and severity of drought broke historical records [5].…”

Section: Figurementioning

confidence: 87%

“…Figure 1 shows the unchanged land cover of Southwestern China, and the red square defines the study area. The red square area shows the severe condition of drought according to the research [5]. There are some mountains in the study area and the mean altitude in the study area is 1520 m.…”

Section: Study Areamentioning

confidence: 99%

“…From 2009 to 2010, Southwestern China experienced a serious drought that affected extensive regions from Yunnan, Guangxi to Sichuan, Guizhou and Chongqing [5,38]. Figure 1 shows the unchanged land cover of Southwestern China, and the red square defines the study area.…”

Section: Study Areamentioning

confidence: 99%

“…The first three types are related to physical phenomena, while the last links drought to the supply and demand of social-economic systems. Increases in the frequency or intensity of severe droughts have been detected over the last several decades, worldwide, and in some cases have been attributed to global climate change [3][4][5]. Extreme drought is a major environmental stress that affects the growth and development of vegetation, subsequently affects the energy balance on the earth's surface and provides invaluable ecosystem services [6].…”

Section: Introductionmentioning

confidence: 99%

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Responses of Natural Vegetation to Different Stages of Extreme Drought during 2009–2010 in Southwestern China

et al. 2015

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An extreme drought event is usually a long-term process with different stages. Although it is well known that extreme droughts that have occurred frequently in recent years can substantially affect vegetation growth, few studies have revealed the characteristics of vegetation responses for different stages of an extreme drought event. Especially, studies should address when the vegetation growth was disturbed and how it recovered through an extreme drought event. In this study, we used the Normalized Difference Vegetation Index (NDVI) and Palmer Drought Severity Index (PDSI) to evaluate the response of vegetation to different stages of a severe drought event during 2009-2010 throughout Southwestern China. The PDSI time series indicated that the drought can be divided into three stages, including an initial stage represented by moderate drought (S1), a middle stage represented by continual severe drought (S2), and a final recovery stage (S3). The results revealed that the drought during the initial stage inhibited the growth of grassland and woody savanna, however, forest growth did not decrease during the first stage of droughts, and there was even a trend towards higher NDVI values. OPEN ACCESSRemote Sens. 2015, 7 14040The continual severe drought in the middle stage inhibited growth for all vegetation types, and the woody savanna was affected most severely. In the final stage, all vegetation types underwent recovery, including the grassland that had endured the most severe drought. This study provides observational evidence and reveals that the responses of forest to the extreme drought are different from grassland and woody savanna in the different drought stages.

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Section: Figurementioning

confidence: 87%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of Natural Vegetation to Different Stages of Extreme Drought during 2009–2010 in Southwestern China

et al. 2015

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“…As part of the 2011-2014 California Drought, the drought in 2014 alone cost California USD 2.2 billion in damages and 17 000 agricultural jobs (Howitt et al, 2014). China has also suffered from extreme drought events, such as the 2009-2010 severe drought in southwestern China (Yang et al, 2012), 2011 spring drought in the Yangtze River basin (Lu et al, 2014), and 2014 summer drought in northern China (Wang and He, 2015). Because drought is a costly and disruptive natural hazard, reliable drought prediction is fundamental for water resource managers to develop and implement feasible drought mitigation measures.…”

Section: Introductionmentioning

confidence: 99%

A conceptual prediction model for seasonal drought processes using atmospheric and oceanic standardized anomalies: application to regional drought processes in China

Liu

et al. 2018

Hydrol. Earth Syst. Sci.

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Abstract. Reliable drought prediction is fundamental for water resource managers to develop and implement drought mitigation measures. Considering that drought development is closely related to the spatial-temporal evolution of largescale circulation patterns, we developed a conceptual prediction model of seasonal drought processes based on atmospheric and oceanic standardized anomalies (SAs). Empirical orthogonal function (EOF) analysis is first applied to drought-related SAs at 200 and 500 hPa geopotential height (HGT) and sea surface temperature (SST). Subsequently, SA-based predictors are built based on the spatial pattern of the first EOF modes. This drought prediction model is essentially the synchronous statistical relationship between 90-day-accumulated atmospheric-oceanic SA-based predictors and SPI3 (3-month standardized precipitation index), calibrated using a simple stepwise regression method. Predictor computation is based on forecast atmospheric-oceanic products retrieved from the NCEP Climate Forecast System Version 2 (CFSv2), indicating the lead time of the model depends on that of CFSv2. The model can make seamless drought predictions for operational use after a year-to-year calibration. Model application to four recent severe regional drought processes in China indicates its good performance in predicting seasonal drought development, despite its weakness in predicting drought severity. Overall, the model can be a worthy reference for seasonal water resource management in China.

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Understanding Atmospheric Anomalies Associated With Seasonal Pluvial‐Drought Processes Using Southwest China as an Example

Liu

et al. 2017

JGR Atmospheres

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Seasonal pluvial‐drought transition processes are unique natural phenomena. To explore possible mechanisms, we considered Southwest China (SWC) as the study region and comprehensively investigated the temporal evolution or spatial patterns of large‐scale and regional atmospheric variables with the simple method of Standardized Anomalies (SA). Some key procedures and results include the following: (1) Because regional atmospheric variables are more directly responsible for the transition processes, we investigate it in detail. The temporal evolution of net vertical integral water vapor flux (net VIWVF) across SWC, together with vertical SA‐based patterns of regional horizontal divergence (D) and vertical motion (ω), coincides well with pluvial‐drought transition processes. (2) With respect to large‐scale circulation patterns, a well‐organized Eurasian (EU) Pattern is one important feature during the pluvial‐drought transitions over SWC. (3) Based on these large‐scale and regional atmospheric anomalous features, relevant SA‐based indices were built, to explore the possibility of simulating drought development using previous pluvial anomalies. As a whole, simulated drought development only with SA‐based indices of large‐scale circulation patterns does not perform well. Further, it can be improved a lot when SA‐based indices of regional D and net VIWVF are introduced. (4) In addition, the potential drought prediction using pluvial anomalies, together with the deep understanding of physical mechanisms responsible for pluvial‐drought transitions, need to be further explored.

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Extreme drought event of 2009/2010 over southwestern China

Cited by 220 publications

References 18 publications

Responses of Natural Vegetation to Different Stages of Extreme Drought during 2009–2010 in Southwestern China

Responses of Natural Vegetation to Different Stages of Extreme Drought during 2009–2010 in Southwestern China

A conceptual prediction model for seasonal drought processes using atmospheric and oceanic standardized anomalies: application to regional drought processes in China

Understanding Atmospheric Anomalies Associated With Seasonal Pluvial‐Drought Processes Using Southwest China as an Example

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