Studying drought phenomena in the Continental United States in 2011 and 2012 using various drought indices

Zhang, Lifu; Jiao, Wenzhe; Zhang, Hongming; Huang, Changping; Tong, Qingxi

doi:10.1016/j.rse.2016.12.010

Cited by 202 publications

(97 citation statements)

References 34 publications

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“…Overall, the combination of multiple drought indices did not significantly improve the ability in simulating crop yield losses. Similar results were also found by [33]. So it was suggested multiple drought indices should be used separately in this case study.…”

Section: Drought Severity Assessment By Combing Multple Drought Indicessupporting

confidence: 87%

“…The drought severity was assessed from three aspects: spatial distribution, temporal evolution, and crop impacts. This study had several new findings in assessing 2012 US drought compared with existing studies [2,28,33,55]. It was concluded as follows.…”

Section: Discussionmentioning

confidence: 85%

“…The above comparison between this study and previous studies did not represent which one is right or wrong because of different drought assessment approaches. Instead, this discrepancy highlights the importance of site-specific drought research [33] and a standardized drought database for thorough comparison in the future. Based on this study, PADI is especially more suitable in late period of drought event, while it should also be used together with other indices like SPI in early and middle drought periods.…”

Section: Discussionmentioning

confidence: 99%

“…In other words, the Midwestern US actually had been under water deficit long before May 2012, which was ignored by previous studies. Only few studies like [2,33] has revealed part of this fact. Therefore, our study demonstrated this multi-index integrated analysis was able to fully uncover the creeping manifestation of agriculture drought.…”

Section: Discussionmentioning

confidence: 99%

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Gauging the Severity of the 2012 Midwestern U.S. Drought for Agriculture

et al. 2017

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Different drought indices often provide different diagnoses of drought severity, making it difficult to determine the best way to evaluate these different drought monitoring results. Additionally, the ability of a newly proposed drought index, the Process-based Accumulated Drought Index (PADI) has not yet been tested in United States. In this study, we quantified the severity of 2012 drought which affected the agricultural output for much of the Midwestern US. We used several popular drought indices, including the Standardized Precipitation Index and Standardized Precipitation Evapotranspiration Index with multiple time scales, Palmer Drought Severity Index, Palmer Z-index, VegDRI, and PADI by comparing the spatial distribution, temporal evolution, and crop impacts produced by each of these indices with the United States Drought Monitor. Results suggested this drought incubated around June 2011 and ended in May 2013. While different drought indices depicted drought severity variously. SPI outperformed SPEI and has decent correlation with yield loss especially at a 6 months scale and in the middle growth season, while VegDRI and PADI demonstrated the highest correlation especially in late growth season, indicating they are complementary and should be used together. These results are valuable for comparing and understanding the different performances of drought indices in the Midwestern US.

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Section: Drought Severity Assessment By Combing Multple Drought Indicessupporting

confidence: 87%

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Gauging the Severity of the 2012 Midwestern U.S. Drought for Agriculture

et al. 2017

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“…For example, satellite‐based vegetation indices (VIs) have been widely used for detecting the severity and impact of drought globally through assessing the water stress‐related vegetation conditions (Asner & Alencar, ; Di et al, ; Mishra & Singh, ; Myneni et al, ; Singh et al, ; Tate & Gustard, ; Tucker & Choudhury, ; Van Loon et al, ). Some of the research indicated that VIs are good indicators to monitor drought (Chang et al, ; Ji & Peters, ; Kogan, ; Liu & Kogan, ; Zhang et al, ). However, other studies have shown that VIs should be used with caution for drought monitoring, as they fail to capture rapid changes in drought responses since these indices are not directly linked to photosynthetic functioning (Dobrowski et al, ; Sun et al, ).…”

Section: Introductionmentioning

confidence: 99%

The Sensitivity of Satellite Solar‐Induced Chlorophyll Fluorescence to Meteorological Drought

Jiao

Chang

2019

Earth's Future

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Solar‐induced chlorophyll fluorescence (SIF) could provide information on plant physiological response to water stress (e.g., drought). There are growing interests to study the effect of drought on SIF. However, to what extent SIF responds to drought and how the responses vary under different precipitation, temperature, and potential evapotranspiration conditions are not clear. In this regard, we evaluated the relationship between satellite‐based SIF product and four commonly used meteorological drought indices (Standardized Precipitation‐Evapotranspiration Index, Standardized Precipitation Index, Temperature Condition Index, and Palmer Drought Severity Index) under diverse climate regions in the continental United States. The four drought indices were used because they estimate meteorological drought conditions based on either single or combined meteorological factors such as precipitation, temperature, and potential evapotranspiration, representing different perspectives of drought. The relationship between SIF and meteorological drought varied spatially and differed for different ecosystem types. The high sensitivity occurred in dry areas characterized by a high mean annual growing season temperature and low vegetation productivity. Through random forest regression analyses, we found that temperature, gross primary production, precipitation, and land cover are the major factors affecting the relationships between SIF and meteorological drought indices. Taken together, satellite SIF is highly sensitive to meteorological drought, but the high sensitivity is constrained to dry regions.

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Impacts of climate and land coverage changes on potential evapotranspiration and its sensitivity on drought phenomena over South Asia

Ali,

Basit,

Umair

et al. 2024

Intl Journal of Climatology

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Understanding the spatiotemporal historical drought pattern and their sensitivity effect on potential evapotranspiration (PET) and vegetation coverage changes is essential for efficient drought mitigation policies under climate change. In this study, we used the standardized precipitation evapotranspiration index (SPEI) at multiple timescales, such as SPEI‐01, SPEI‐03, SPEI‐06, SPEI‐09 and SPEI‐12; we explored their regional‐scale dry and wet annual changes across seven sub‐regions of South Asia from 1902 to 2018. Results suggest that from 1981 to 2018, the extreme drought of SPEI has increased in South Asia, which mostly affects the summer and winter growing seasons, that is, SPEI‐06 to SPEI‐12 across seven sub‐regions of South Asia. The frequency of drought events during dry and wet annual changes of SPEI had an extremely dry year starting from 1998 to 2018, which mostly affected the South Asia region. Data from the past 18 years showed that the land changing detection has increased in the forests, cultivated land, arid land, savanna and farmland; by contrast, there has been significantly reduced permanent ice and snow, mixed forests, open shrub, grasslands, permanent wetlands, water bodies and evergreen broadleaf forests. Seasonal SPEI presented diverse characteristics such as showing a dry trend in Afghanistan, India, Pakistan and Sri Lanka during autumn and winter. Afghanistan and Bhutan are wet during the summer compared with other sub‐regions of South Asia, with drought frequency occurring at 45.3% and 44.4%. Sri Lanka, Pakistan and India are the driest regions in South Asia due to their high drought frequency, duration and intensity. The correlation between PET and crop water stress index (CWSI), PET and regional ETp reduction (Er) indicated a considerably negative correlation, while a significantly positive correlation was found between CWSI and Er, NDVI and Er. This study provides a comprehensive assessment of climate and vegetation coverage changes on PET, ET and SPEI, and can help in formulating long‐term adaptive strategies to reduce the cumulative impacts of droughts.

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Studying drought phenomena in the Continental United States in 2011 and 2012 using various drought indices

Cited by 202 publications

References 34 publications

Gauging the Severity of the 2012 Midwestern U.S. Drought for Agriculture

Gauging the Severity of the 2012 Midwestern U.S. Drought for Agriculture

The Sensitivity of Satellite Solar‐Induced Chlorophyll Fluorescence to Meteorological Drought

Impacts of climate and land coverage changes on potential evapotranspiration and its sensitivity on drought phenomena over South Asia

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