نتایج جستجو برای: palmer drought severity index
تعداد نتایج: 561124 فیلتر نتایج به سال:
Abstract Food security is a key target in the UN Sustainable Development Goals (SDGs) and also one of biggest challenges for China, largest developing country population world. Massive attention has been directed to future impacts hydrometeorological extremes on crop yield. However, knowledge gaps still stand concerning effectiveness irrigation, as water consumption sector, agricultural product...
Long records of tree-ring maximum latewood density (MXD) measurements in conifers have been successfully employed to reconstruct summer temperature changes globally. Yet, the potential MXD as a proxy semi-arid, low-latitude regions for reconstructing either or hydroclimate variability remains largely unexplored. Here, we developed data set Chinese pine from semi-arid northern China, and investi...
The Nebraska Sand Hills (NSH) lies in the western part of Nebraska, United States. We chose north-eastern, central, and parts NSH with distinct climate, topography, hydrology. study assesses response hundreds shallow groundwater-fed lakes to drought. Total lake area (TLA), determined by classifying Landsat satellite images from 1984 2018, was juxtaposed published Palmer Drought Severity Index (...
This manuscript aims to develop a new multivariate composite index for monitoring agricultural drought. To achieve this, the AVHRR, VIIRS, CHIRPS data series over period of 40 years, rainfall and crop yield as references were used. Variables include parameters vegetative stress (SVCI, PV, SMN), water (PCI, RDI, NRDI), heat (SMT, TCI, STCI), variable related environmental conditions was calculat...
Drought is a natural disaster with long duration and which causes great harm. Studying the characteristics of drought evolution in Shanxi Province can grasp regularity occurrence provide basis for prevention resistance. This study utilizes MODIS products to analyze quantify extent specific area. The calculates several indices, including Crop Water Stress Index (CWSI), Vegetation Supply (VSWI), ...
A new drought index is introduced that explicitly considers both water supply and demand. It can be applied to aggregate demand over a geographical region, or for disaggregated demand related to a specific crop or use. Consequently, it is more directly related than existing indices, to potential drought impacts on different segments of society, and is also suitable to use as an index for drough...
The devastating socioeconomic impacts of recent droughts have intensified the need for improved drought monitoring in South Africa (SA). This study has shown that not all indices can be universally applicable at regions worldwide, and there is no single index represent aspects droughts. aim this was to review performance applicability Palmer severity (PDSI), surface water supply (SWSI), vegetat...
The Gravity Recovery and Climate Experiment (GRACE) mission has measured total water storage change (TWSC) interpreted drought patterns in an unparalleled way since 2002. Nevertheless, there are few sources that can be used to understand prior the GRACE era. In this study, we extended gridded TWSC 1993 by combining principal component analysis (PCA), least square (LS) fitting, multiple linear r...
An extreme drought occurred from 1876 to 1878 in most regions of northern China, leading a series social impacts, including harvest failures, price inflation, and population migration. Most the Northern Hemisphere concurrently experienced drought. Here, we use reconstructed high-resolution hydroclimatic (Palmer Drought Severity Index/precipitation) datasets investigate seasonal–annual spatial p...
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