Characterization of meteorological drought over a dryland ecosystem in north western India

Singh, Omvir; Saini, Divya; Bhardwaj, Pankaj

doi:10.1007/s11069-021-04857-9

Cited by 14 publications

(3 citation statements)

References 112 publications

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“…For example, in the case of PDSI, SPI, and SPEI, a drought starts when the index assumes a negative value and ends when the index back to assume positive values (Table 1). The duration of a drought event is simply the difference between the end and start date [28,29], i.e., the period of consecutive months of drought is considered a drought event [10]. Usually, drought is assessed on a monthly scale, and each event lasts at least two to three months but can extend to several months or years [30].…”

Section: Introductionmentioning

confidence: 99%

The Drought Regime in Southern Africa: A Systematic Review

Chivangulula,

Amraoui,

Pereira

2023

Climate

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Drought is one natural disaster with the greatest impact worldwide. Southern Africa (SA) is susceptible and vulnerable to drought due to its type of climate. In the last four decades, droughts have occurred more frequently, with increasing intensity and impacts on ecosystems, agriculture, and health. The work consists of a systematic literature review on the drought regime’s characteristics in the SA under current and future climatic conditions, conducted on the Web of Science and Scopus platforms, using the PRISMA2020 methodology, with usual and appropriate inclusion and exclusion criteria to minimize/eliminate the risk of bias, which lead to 53 documents published after the year 1987. The number of publications on the drought regime in SA is still very small. The country with the most drought situations studied is South Africa, and the countries with fewer studies are Angola and Namibia. The analysis revealed that the main driver of drought in SA is the ocean–atmosphere interactions, including the El Niño Southern Oscillation. The documents used drought indices, evaluating drought descriptors for some regions, but it was not possible to identify one publication that reports the complete study of the drought regime, including the spatial and temporal distribution of all drought descriptors in SA.

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Section: Introductionmentioning

confidence: 99%

The Drought Regime in Southern Africa: A Systematic Review

Chivangulula,

Amraoui,

Pereira

2023

Climate

View full text Add to dashboard Cite

show abstract

“…For example, in the case of PDSI, SPI and SPEI a drought starts when the index assumes a negative value and ends when the index back to assume positive values (Table 1). The duration of a drought event is simply the difference between the end and start date [28,29] i.e., the period of consecutive months of drought is considered a drought event [10]. Usually, drought is assessed at monthly scale and each event last, at least, two to three months, but can extend to several months or years [30].…”

Section: Introductionmentioning

confidence: 99%

The Drought Regime in Southern Africa: A Systematic Review

Chivangulula,

Amraoui,

Pereira

2023

Preprint

View full text Add to dashboard Cite

Drought is one natural disaster with the greatest impact worldwide. Southern Africa (SA) is susceptible and vulnerable to drought due to its type of climate. In the last four decades, droughts have occurred more frequently, with increasing intensity and impacts on ecosystems, agriculture and health. The work consisted of a systematic literature review on the drought regime’s characteristics in the SA, under current and future climatic conditions, conducted on the Web of Science and Scopus platforms, using the PRISMA2020 methodology, with usual and appropriate inclusion and exclusion criteria to minimize/eliminate the risk of bias, which lead to 41 documents published after the year 2000. The number of publications on the drought regime in SA is still very small. The country with the most drought situations studied is South Africa and the fewer studies are Angola and Namibia. The analysis revealed that the main driver of drought in SA is the ocean-atmosphere interactions including the El Niño Southern Oscillation. The documents used drought indices, evaluating drought descriptors for some regions, but it was not possible to identify one publication that reports the complete study of the drought regime, including the spatial and temporal distribution of all drought descriptors in SA.

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“…Therefore, drought identification and warning have attracted more attention in recent decades, and identifying drought based on classification is the most popular approach. From a different field's perspective, drought can be separated into meteorological drought (Singh et al 2021), agricultural drought (Zhang et al 2021), hydrological drought (Kolachian & Saghafian 2021), and socioeconomic drought (Kundu et al 2021). The release of drought warning signals is based on drought identification, which requires scientific quantitative calculation indices.…”

Section: Introductionmentioning

confidence: 99%

The dynamic identification mechanism research of drought based on process description

Xie

Yang

et al. 2022

Water Supply

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Drought is one of the most common natural disasters, which can cause heavy losses on a global scale. Strengthening the research on drought identification mechanism has an important guiding role in drought disaster prevention and mitigation. The current drought identification is mostly static in the process of drought, and there is a problem that the historical evaluation information and the drought prediction information are not closely combined, with limited application value. Based on the physical cumulative and recessional effects of drought events, this paper further uses the Standardized Precipitation Index (SPI) to divide the whole drought process into four stages: accumulation → outbreak → reaction → restoration. In addition, this study proposes a new dynamic identification mechanism based on drought process, and develops a drought prediction model combining singular spectrum analysis and BP neural network (SSA-BPNN), filling the gap between scientific research and practical application. Using three drought events in the Yulin region of China as examples for simulation studies, the results show that the use of the new mechanism can not only improve the application value of the SSA-BPNN model, but also effectively advance the drought preparation time and resistance level.

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Characterization of meteorological drought over a dryland ecosystem in north western India

Cited by 14 publications

References 112 publications

The Drought Regime in Southern Africa: A Systematic Review

The Drought Regime in Southern Africa: A Systematic Review

The Drought Regime in Southern Africa: A Systematic Review

The dynamic identification mechanism research of drought based on process description

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