Long-term observational datasets are essential for understanding the magnitude and frequency of past extreme events over extended timescales. In mountain regions where instrumental records are limited, tree rings provide a valuable natural archive of environmental and geomorphic changes. Tree rings are formed by the vascular cambium, a thin layer of dividing cells between the wood (xylem) and bark (phloem). At Continue Reading »

The North Indian Ocean (NIO) is one of the most significant cyclone-producing basins in the world, playing a crucial role in regional climate and weather extremes. It consists of two major cyclone basins: the Bay of Bengal (BoB) located on the eastern side of India and the Arabian Sea located on the western side. Although it contributes only about 6% Continue Reading »

Natural dust emission from an arid or semi-arid region occurs when near-surface wind speed exceeds a threshold wind speed which can further be modulated by several factors such as surface roughness, soil texture, soil moisture, vegetation cover etc. Many major dust sources are located in the subtropical dry belt primarily due to the subtropical high pressure system attributed to the Continue Reading »

Uttarakhand experienced a noticeable escalation in forest fire activity during the first four months of 2026. Fire occurrence remained relatively moderate in January, with 200 MODIS active-fire detections recorded across the state. Activity then declined to 113 detections in February, representing a 43.5% decrease, likely due to the influence of residual winter moisture and comparatively lower fuel flammability. As temperatures Continue Reading »

Gravitational waves are tiny ripples in spacetime produced when massive objects accelerate, especially during some of the most energetic events in the universe. But what does it truly mean for spacetime itself to “ripple”? How can something so abstract produce measurable physical effects? The concept originates from Albert Einstein’s general theory of relativity (1916), which describes gravity not as a Continue Reading »