Trends and Extremes of Drought Episodes in Vietnam Sub-Regions during 1980–2017 at Different Timescales

Stojanović, Milica; Liberato, Margarida L. R.; Sorí, Rogert; Vázquez, M.; Phan-Van, Tan; Duongvan, Hieu; Cong, Tin Hoang; Nguyen, Phuong Mai; Nieto, Raquel; Gimeno, Luis

doi:10.3390/w12030813

Cited by 29 publications

(22 citation statements)

References 78 publications

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“…This indicates that the decreases in the SPI and SDI values are related to increases in the El Niño and PDO warm phases, and consequently rises in the possibility of meteorological and hydrological droughts. Similarly, Stojanovic et al (2020) also indicated negative correlations of meteorological drought with the ENSO and PDO in South Vietnam. Table 3 also shows that the meteorological drought has 7-month lag time from the ENSO and 8-month lag time from the PDO, and the hydrological drought has 8-month lag time from the ENSO and 9-month lag time from the PDO.…”

Section: Identification Of Historical Drought Characteristicsmentioning

confidence: 85%

“…In the 2015/2016 drought alone, Vietnam had suffered an economic loss of approximately USD$ 674 million, accounting for about 0.35% of GDP in 2015(UNDP 2016. Recently, drought studies in Vietnam under climate change impacts have received considerable attentions; however, they are mainly focused on meteorological drought (Vu-Thanh et al 2014;Vu et al 2015b;Stojanovic et al 2020), and there is still limited knowledge of climate change impacts on the hydrological drought in Vietnam. Furthermore, the interaction between the global climate oscillation (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Impact of climate change on hydro-meteorological drought over the Be River Basin, Vietnam

Khôi

Sam

Loi

et al. 2021

Journal of Water and Climate Change

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In this paper, the responses of hydro-meteorological drought to changing climate in the Be River Basin located in Southern Vietnam are investigated. Climate change scenarios for the study area were statistically downscaled using the Long Ashton Research Station Weather Generator tool, which incorporates climate projections from Coupled Model Intercomparison Project 5 (CMIP5) based on an ensemble of five general circulation models (Can-ESM2, CNRM-CM5, HadGEM2-AO, IPSL-CM5A-LR, and MPI-ESM-MR) under two Representative Concentration Pathway (RCP) scenarios (RCP4.5 and RCP8.5). The Soil and Water Assessment Tool model was employed to simulate streamflow for the baseline time period and three consecutive future 20 year periods of 2030s (2021–2040), 2050s (2041–2060), and 2070s (2061–2080). Based on the simulation results, the Standardized Precipitation Index and Standardized Discharge Index were estimated to evaluate the features of hydro-meteorological droughts. The hydrological drought has 1-month lag time from the meteorological drought and the hydro-meteorological droughts have negative correlations with the El Niño Southern Oscillation and Pacific Decadal Oscillation. Under the climate changing impacts, the trends of drought severity will decrease in the future; while the trends of drought frequency will increase in the near future period (2030s), but decrease in the following future periods (2050 and 2070s). The findings of this study can provide useful information to the policy and decisionmakers for a better future planning and management of water resources in the study region.

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Section: Identification Of Historical Drought Characteristicsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Impact of climate change on hydro-meteorological drought over the Be River Basin, Vietnam

Khôi

Sam

Loi

et al. 2021

Journal of Water and Climate Change

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“…Moreover, the SPI (2006, 2012, and 2018) reported, three extremely wet events although only one was noted by the SPEI (2018). It should be noted that there is a disparity between SPI and SPEI results from 2017 to 2019, where the SPEI indicates the occurrence of only wet events This disparity between the indices occurs because of the increase in precipitation, the only variable that the SPI index takes into account, occurs before the decrease in temperature, a variable that the SPEI requires to calculate the climate water balance (Stojanovic et al, 2020). The SPI and SPEI values on a 6-month time scale oscillate between −2.5 and 2.0 ( Figure 5).…”

Section: Spi and Spei Indicesmentioning

confidence: 99%

“…It should be noted that although the SPEI values generally oscillated between −3.0 and 2.0, the 24-months SPEI is the only one that has presented values close to −3.0 ( Figure 7A), in comparison to other SPEI values at smaller scales. This may suggest that the importance of temperature and evapotranspiration is greater for longer time scales (Stojanovic et al, 2020).…”

Section: Spi and Spei Indicesmentioning

confidence: 99%

Dry and Wet Events in Andean Populations of Northern Peru: A Case Study of Chachapoyas, Peru

Rascón

Ángeles

Huatangari

et al. 2021

Front. Environ. Sci.

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Climate change and population growth have heavily impacted the ecosystem’s water resources, essential for anthropogenic activities. These also apply to the Andean city of Chachapoyas, located in the north of Peru, which has gone through a substantial population increase in recent years, therefore increasing its water demand. This research aimed to assess dry and wet events from 1981 to 2019 that have taken place in Chachapoyas, by applying the Standardized Precipitation Index (SPI), and the Standardized Precipitation Evapotranspiration Index (SPEI). These events were periodically characterized, and the index relationship was determined at different timescales. The SPI and SPEI indices were calculated at the city’s only weather station for timescales of 3, 6, 12, and 24 months using climatic data. The indices showed a remarkably consistent behavior for timescales of 12 and 24 months detecting an extreme drought event in 1993, while for timescales of 3 and 6 months a severe drought event was detected in the same year. Contrastingly, there has been an increase in extreme wet events in the last decade, hence Chachapoyas is categorized between "moderate drought" and “moderate wet”. It should be noted that the indices have a high correlation between them when calculated for the same timescale. The results were statistically significant (p < 0.05). Considering the results obtained related to dry and wet events and their relation with economic activities such as environmental management, we can conclude that the SPI and SPEI indices are useful and valuable tools for local and regional governments.

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“…Spearman correlation is a non-parametric test. Both correlation methods are widely used to detect regional rainfall teleconnection with climate indices [10,43,45,52,54,55].…”

Section: Climate Indicesmentioning

confidence: 99%

Variation in Seasonal Precipitation over Gaza (Palestine) and Its Sensitivity to Teleconnection Patterns

Ajjur

Al-Ghamdi

2021

Water

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The seasonal precipitation (SP) trend and its sensitivity to teleconnection patterns over the East Mediterranean (EM) region remain inconsistent. Based on rainfall records during 1974–2016 at seven meteorological stations in the Gaza region, this study aims to (1) analyze the observed SP trend over the Gaza region, and (2) examine the SP sensitivity to climate indices. Pearson and Spearman correlations between climate indices and SP in the current and following years were calculated, and the seasonal period (particular month) with the highest correlation was identified. Results show that the climate indices, with greater impact on SP over the Gaza region in the autumn and spring, were in the order; El Niño-Southern Oscillation (ENSO) > East Atlantic/Western Russia (EAWR) > North Atlantic Oscillation (NAO) > Arctic Oscillation (AO). The indices’ impact was minimal in the winter precipitation. ENSO types’ correlations (Southern Oscillation Index-SOI and Niño 3.4) were moderate and significant at α = 0.05. Rainfall at most stations positively correlates with AO and EAWR in spring and autumn. During the study period, warm phases of ENSO (i.e., El Niño) intensified autumn precipitation. Simultaneously with warm phases of EAWR or AO, more influence on autumn precipitation is exerted. Cold phases of ENSO (i.e., La Niña) have an adverse impact compared to El Niño. EAWR co-variation was evident only with the ENSO. Regarding AO, a non-meaningful action was noticed during the neutral phases of ENSO and EAWR. The findings of this study help understand and predict the seasonal trend of precipitation over the Gaza region. This is essential to set up climate change mitigation and adaptation strategies in the EM region.

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Trends and Extremes of Drought Episodes in Vietnam Sub-Regions during 1980–2017 at Different Timescales

Cited by 29 publications

References 78 publications

Impact of climate change on hydro-meteorological drought over the Be River Basin, Vietnam

Impact of climate change on hydro-meteorological drought over the Be River Basin, Vietnam

Dry and Wet Events in Andean Populations of Northern Peru: A Case Study of Chachapoyas, Peru

Variation in Seasonal Precipitation over Gaza (Palestine) and Its Sensitivity to Teleconnection Patterns

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