Historical changes in drought characteristics and their impact on vegetation cover over Madagascar
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10509140" target="_blank" >RIV/00216208:11320/25:10509140 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n7O4ytTL4P" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n7O4ytTL4P</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5194/nhess-25-2939-2025" target="_blank" >10.5194/nhess-25-2939-2025</a>
Alternative languages
Result language
angličtina
Original language name
Historical changes in drought characteristics and their impact on vegetation cover over Madagascar
Original language description
Drought has become one of the most devastating natural hazards in recent decades, causing severe vegetation degradation. This study aims to analyze the spatiotemporal characteristics of drought (duration, frequency, severity, intensity) over Madagascar during 1981-2022. In addition, it evaluates the relationship between the Standardized Precipitation Index (SPI) and the Normalized Difference Vegetation Index (NDVI) during 2000-2022, representing the impact of drought on vegetation over the studied area. Drought assessment was conducted on SPI-3, SPI-6, and SPI-12 timescales, accompanied by seasonal and annual analyses, while the NDVI-SPI relationship was examined through the analysis of vegetation changes based on specific selected SPI time periods and the correlation analysis. The findings reveal that drought events have become more consecutive during the most recent past (2017 to 2022) and have intensified over the southern part of the country. Links between drought occurrences and vegetation changes have been confirmed: monthly vegetation losses are severe and noticeable when prominent negative SPI values occur simultaneously across SPI-3, SPI-6, and SPI-12 over a region, and the impact of drought on seasonal and annual vegetation is detected when prominent negative SPI values occur from seasonal and annual SPI analyses over a region. The correlation between the NDVI anomaly and the SPI emphasizes the NDVI-SPI relationship found with statistical significance, especially over southern Madagascar. These findings are crucial for complementing other climatic factors that influence Madagascar's vegetation besides drought.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
<a href="/en/project/EH22_008%2F0004605" target="_blank" >EH22_008/0004605: Natural and anthropogenic georisks</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Natural Hazards and Earth System Science
ISSN
1561-8633
e-ISSN
1684-9981
Volume of the periodical
25
Issue of the periodical within the volume
9
Country of publishing house
DE - GERMANY
Number of pages
23
Pages from-to
2939-2961
UT code for WoS article
001561097000001
EID of the result in the Scopus database
2-s2.0-105015314873