Water clarity (generally quantified as the Secchi disk depth: SDD) is a key variable for assessing environmental changes in lakes. Using remote sensing we calculated and elucidated SDD dynamics lakes Inner Mongolia-Xinjiang Lake Zone (IMXL) from 1986 to 2018 response variations temperature, rainfall, lake area, normalized difference vegetation index (NDVI) Palmer's drought severity (PDSI). The ...

Simple mean-field approach for frustrated antiferromagnets on hexagonal lattices, aimed to describe the high-temperature part of temperature-magnetic field phase diagram, is proposed. It shown, that an interplay between modulation vector symmetry, Zeeman energy and magneto-dipolar interaction leads stabilization triple-$Q$ skyrmion lattice in a certain region diagram. Corresponding analytical e...

Abstract Extensive and severe droughts have substantial effects on water supplies, agriculture, aquatic ecosystems. To better understand these droughts, we used tree-ring-based reconstructions of the Palmer drought severity index (PDSI) for period 1475–2017 to examine that covered at least 33% conterminous United States (CONUS). We identified 37 spatially extensive events CONUS examined their s...

Drought poses a serious threat to agricultural production and food security in the context of global climate change. Few studies have explored response mechanism lag time drought meteorological from perspective cultivated land types. This paper analyzes spatiotemporal evolution patterns hysteresis relationship droughts middle lower reaches Yangtze River China. Here, Moderate Resolution Imaging ...

[1] In this paper, we investigate floods and droughts in the Upper Mississippi basin over a 50-year period (1950–1999) using a hydrological model (Variable Infiltration Capacity Model – 3 Layer). Simulations have been carried out between January 1950 and December 1999 at daily timestep and 1/8 spatial resolution for the water budget and at hourly time-step and 1 spatial resolution for the energ...

drought is a normal, recurring feature of climate phenomena; it may occur virtually in all climatic regions. the effects of drought accumulate slowly and its impacts are spread over a larger geographical area than other natural hazards. drought is a natural hazard originating from a deficiency of precipitation that result in a water shortage for some activities or some groups and is often assoc...