The Role of Climate Change and Its Sensitivity on Long-Term Standardized Precipitation Evapotranspiration Index, Vegetation and Drought Changing Trends over East Asia

Plants, Journal Year: 2024, Volume and Issue: 13(3), P. 399 - 399

Published: Jan. 29, 2024

Droughts have become more severe and frequent due to global warming. In this context, it is widely accepted that for drought assessments, both water supply (rainfall) demand (standardized precipitation evapotranspiration index, SPEI) should be considered. Using SPEI, we explored the spatial-temporal patterns of dry wet annual seasonal changes in five sub-regions East Asia during 1902-2018. These factors are linked excess frequency severity on regional scale, their effect vegetation remains an important topic climate change studies. Our results show SPEI significantly improved extreme mostly affected SPEI-06 SPEI-12 growing seasons 1981-2018. The trends affect Asia. had two extremely spells 1936-1947 1978-2018. Japan, South Korea, North Korea summer compared other regions Asia, with occurring at 51.4%, respectively. mean frequencies China Mongolia 57.4% 54.6%. driest high duration. spatial analysis solar radiation (SR), vapor pressure (WVP), wind speed (WS), condition index (VCI), temperature (TCI), health (VHI) confirmed region suffered from maximum events. variation shows no clear drying autumn seasons. During winter spring seasons, there was a trend region. 1902-1990, presented diverse characteristics, Mongolia, four different Korea. 1991-2018, while showed spring, autumn, This ecological climatic mechanism provides good basis assessment drought-change variations within An understandings long-term effects rainfall droughts varying essential resource management adaptation. Based results, resources will increase under warming, which may alleviate scarcity issue

Language: Английский

Urban Expansion-Induced Land Use Land Cover Changes and the Subsequent Changes in Ecosystem Service and Land Surface Temperature in the Central Highland of Ethiopia

Environmental and Sustainability Indicators, Journal Year: 2025, Volume and Issue: unknown, P. 100626 - 100626

Published: Feb. 1, 2025

Language: Английский

Drought Characteristics and Drought-Induced Effects on Vegetation in Sri Lanka

Climate, Journal Year: 2024, Volume and Issue: 12(11), P. 172 - 172

Published: Oct. 29, 2024

Understanding the spatiotemporal characteristics of drought and its impacts on vegetation is a timely prerequisite to ensuring agricultural, environmental, socioeconomic sustainability in Sri Lanka. We investigated (duration, severity, frequency, intensity) from 1990 2020 by using Standardized Precipitation Evapotranspiration Index (SPEI) at various timescales cumulative lagged effects between 2000 across climatic zones Lanka (Dry, Wet, Intermediate). SPEI indexes 1-, 3-, 6-, 12-, 24-month scales were used analyze characteristics. Frequent droughts (~13%) common all zones, with concentration Dry zone during last decade. Drought occurrences mostly ranged moderate severe extreme events more zone. This research Normalized Difference Vegetation (SNDVI) 0 vegetation. Cumulated had maximum correlation coefficient values concentrated −0.41–0.98 range affected 40% 16% Intermediate within 1–4 months. The effect SNDVI showed −0.31–0.94 high areas primarily distributed zones. Over 60% impact 1 month, while 52% Wet experienced it over 11 resulting dominant shorter timescale responses indicate higher sensitivity findings this study provide important insights into possible changes their climate

Language: Английский