In the southeastern United States, drought can pose a significant threat to forests by reducing the amount of available water, thereby stressing trees. Destructive changes in crown conditions provide the first visible indication of a problem in a forested area, making it a useful indicator for problems within an ecosystem. Forest Health and Monitoring (FHM) and Palmer’s Drought Severity Index (...

The severity of recent droughts in semiarid regions is increasingly attributed to anthropogenic climate change, but it is unclear whether these moisture anomalies exceed those of the past and how past variability compares to future projections. On the Mongolian Plateau, a recent decade-long drought that exceeded the variability in the instrumental record was associated with economic, social, an...

Droughts have an adverse influence on agriculture, the environment, water supplies, and global economy. The drought risk was computed using integrated prospective approach: hazard, exposure, vulnerability based biophysical socio-economic conditions over Karachi, Pakistan during 2000–2019. Drought hazard map (DHM) created annual Palmer severity Index (PDSI). exposure (DEM) derived population den...

Due to the lack of a general drought definition, water users and managers have developed used different indices. Many studies using indices been made so as detect events or just compare their results assess advantages disadvantages. In Portugal, these done for common indices; however, an integrated evaluation comparison recent data is needed. Therefore, this study intended give updated overview...

Understanding the ecological role of fire in forests is essential for proper management and conservation programs. The objectives this study were: (1) to reconstruct history fires a temperate forest Sierra Madre Occidental; (2) interpret impacts climate on structure. Sixty tree cross-sections with scars were analyzed, descriptive statistics generated. Additionally, growth cores ages trees diffe...

There is consistent evidence of vegetation greening in Central Asia over the past four decades. However, early 1990s, temporarily stagnated and even for a time reversed. In this study, we evaluate changes normalized difference index (NDVI) based on long-term satellite-derived remote sensing data systems Global Inventory Modelling Mapping Studies (GIMMS) NDVI from 1981 to 2013 MODIS 2000 2020 de...

the agriculture sector has been affected by severe drought in recent years, making development of a drought warning system for agriculture crucial. such a system can be a useful tool for policy makers and investors. this research develops a model for agricultural drought risk assessment using statistical and intelligent methods. kermanshah province, a major rain-fed region of iran, was selected...