Results 251 to 260 of about 69,645 (299)

Evaluating the effect of the SPI and SPEI methods on drought monitoring over Turkey

Journal of Hydrology, 2023
Veysel Gümüş
exaly   +2 more sources

Drought characteristics and dominant factors across China: Insights from high-resolution daily SPEI dataset between 1979 and 2018.

Science of the Total Environment, 2023
Drought, a complex phenomenon exacerbated by climate change, is influenced by various climate factors. The escalating global temperatures associated with climate change, impact precipitation patterns and water cycle processes, consequently intensifying ...
Linglin Wan, Virgílio A. Bento, Yanping Qu, Jianxiu Qiu, Hongquan Song, Rongrong Zhang, Xiaoping Wu, Feng Xu, Jinkuo Lu, Qianfeng Wang   +9 more
semanticscholar   +1 more source

An evaluation framework for quantifying vegetation loss and recovery in response to meteorological drought based on SPEI and NDVI.

Science of the Total Environment, 2023
Drought affects vegetation growth to a large extent. Understanding the dynamic changes of vegetation during drought is of great significance for agricultural and ecological management and climate change adaptation.
Chuanhao Wu, Lu-jian Zhong, Pat J.‐F. Yeh, Zhengjie Gong, Wenhan Lv, Bei Chen, Jun Zhou, Jiayun Li, Saisai Wang   +8 more
semanticscholar   +1 more source

Standardized precipitation evapotranspiration index (SPEI) for Canada: assessment of probability distributions

Canadian Water Resources Journal / Revue canadienne des ressources hydriques, 2023
Candidate probability distributions for the Standardized Precipitation Evapotranspiration Index (SPEI) for Canada were examined using the Canadian Gridded (CANGRD) temperature and precipitation dataset and CMIP5 projections.
Benita Y. Tam, Alex J. Cannon, B. Bonsal
semanticscholar   +1 more source

Assessing spatio-temporal mapping and monitoring of climatic variability using SPEI and RF machine learning models

Geocarto International, 2022
Droughts may inflict significant damage to agricultural and water supplies, resulting in substantial financial losses as well as the death of people and livestock.
S. S. Wahla, Syed Jamil H. Kazmi, A. Sharifi, S. A. Shirazi, A. Tariq, Hayley Joyell Smith   +5 more
semanticscholar   +1 more source

An enhanced Standardized Precipitation–Evapotranspiration Index (SPEI) drought-monitoring method integrating land surface characteristics

Earth System Dynamics
. Atmospheric evaporative demand is a key metric for monitoring agricultural drought. Existing ways of estimating evaporative demand in drought indices do not faithfully represent the constraints imposed by land surface characteristics and become less ...
Liqing Peng, J. Sheffield, Zhongwang Wei, M. Ek, Eric F. Wood   +4 more
semanticscholar   +1 more source

Modeling Short-Term Drought for SPEI in Mainland China Using the XGBoost Model

Atmosphere
Accurate drought prediction is crucial for optimizing water resource allocation, safeguarding agricultural productivity, and maintaining ecosystem stability.
Fanchao Zeng, Q. Gao, Lifeng Wu, Zhilong Rao, Zihan Wang, Xinjian Zhang, Fuqi Yao, Jinwei Sun   +7 more
semanticscholar   +1 more source

The Spey Bay geomorphological study

Earth Surface Processes and Landforms, 1995
AbstractThe Spey Bay coastline and the estuary of the River Spey exhibit a rapidly evolving planform. They provide an opportunity to study geomorphological changes in a coupled coastal/estuarine system which can be measured over hours and days rather than the years and decades associated with more slowly evolving landscape features.
Keith J. Riddell, Terence W. Fuller
openaire   +1 more source

SPEI and SPI correlation in the study of drought phenomena in Umbria region (central Italy)

Environmental science and pollution research international
This study aims to analyze the performances and correlation of the standardized precipitation index (SPI) and standardized precipitation evaporation index (SPEI) from the perspective of supplying effective indicators for drought risk management ...
Sara Venturi, D. Dunea, Elena Mateescu, A. Vîrsta, Nicolae Petrescu, Stefano Casadei   +5 more
semanticscholar   +1 more source

Spey Power Plant

Aircraft Engineering and Aerospace Technology, 1964
IN short‐ and medium‐haul operation an aero engine is subjected to a greater frequency of full‐power cycles; these operations therefore impose more exacting conditions on an engine than docs long‐haul service. For this reason, it is important to appreciate that in designing the Spey, Rolls‐Royce has been able to call on 14 million hours of experience ...
openaire   +1 more source