Vikram Singh

University of Lucknow

The unavailability of weather records from the orography dominated high Himalayas restricts our understanding in long term perspective. However, remote high-altitude regions of Himalaya silently testify the regional climate and can provide valuable insights of real climatic challenges in the absence of instrumental observatories. The tree-species o...

Droughts are recurring phenomena in the north‐western Himalaya causing severe socioeconomic hardships. Our understanding on temporal and spatial occurrence of such extreme droughts in long‐term perspective is constrained due to limited short‐term weather records. Toward fulfilling such a large data void, we developed a network of ring‐width chronol...

The Himalayan mountain system is the abode of diverse tree species growing at different elevations from sub-tropical to sub-alpine regions. Many of the tree species growing in the Himalayan region are known to attain several centuries to millennial age. Trees growing in environments with seasonal climate produce annual growth rings, which represent...

Tree-ring based climate reconstruction from western Himalaya

The Himalayan mountain system has a large network of rivers that originate from glacier and snowfed valleys. These rivers fulfill the socioeconomic needs of the millions of people in the adjacent and low lying areas in different ways. The changing climate of the globe is adversely affecting the natural discharge of rivers and threatening the ecosys...

Ecologically Himalayan blue pine (Pinus wallichiana A. B. Jackson) is the most sensitive tree-species found across the high mountain ranges of Himalaya with deciphering tree-line for the region. Earlier studies showed the potential of Himalayan blue pine to reconstruct the past climate for extending observational data back to the centuries from oro...

The spatial and temporal span of hydrological impact of the “Little Ice Age” (LIA) in the north‐western Himalaya is not well constrained due to data limitation. We evaluated a network of tree‐ring chronologies from moisture‐stressed ecological settings in Jammu and Kashmir to identify the impact of LIA over the western Himalaya. Our study reflects...

Droughts in the orography dominated mid-to-high elevation Himalaya have serious impact on the agrarian economy and biodiversity of the region. Temporally and spatially limited weather records from the Himalaya restrict our understanding on the socioeconomic impact of droughts in long-term perspective. In view of this, high-resolution proxies are re...

Hydroclimatic variability driven by global warming in the climatically vulnerable cold semi-arid to arid northwest (NW) Himalaya is poorly constrained due to paucity of continuous weather records and annually resolved proxies. Applying a network of annually resolved tree-ring-width chronologies from semi-arid region of Kishtwar, Jammu and Kashmir,...

Droughts in semi-arid and arid regions of the northwest Himalaya are very common causing distress to socioeconomic systems. Our understanding on natural variability in droughts in the northwest Himalaya in long-term perspective is limited largely due to paucity of observational and high-resolution proxy records. We developed a 275-years (A.D. 1740–...

Key message Growth ring study of Pinus kesiya (khasi pine) growing in sub-tropical forest in Manipur, northeast India was performed to understand climate signatures in ring widths and intra-annual density fluctuations. Abstract The growth rings in khasi pine (Pinus kesiya Royle ex Gordon) growing in sub-tropical Reserve Forest in Imphal, Manipur, n...

The instrumental weather records from the western Himalayan region for the past century show an increase in annual mean atmospheric temperature with winters warming at a faster rate. The vegetation of the upper ecotonal zones, already on the climatic threshold is sensitive to any such change in climate variable most limiting the growth. To investig...