Glacier-Climate interaction is complex and invites a rigorous and systematic analysis. Moreover, the variability in glacier fluctuations across the Himalaya makes it more multifaceted. Therefore, there is a strong need for continuous monitoring of glacial change in the poorly surveyed glaciered areas of the Himalaya, considering significant debate pertaining to the rising global temperature and its likely impact on the mountain glaciers (Intergovernmental Panel on Climate Change, IPCC 2007; IPCC 2014) along with evaluation of regional/local level controls on climatic parameters. During my Ph.D., I addressed the question that “How do climatic parameters and topographic configurations influence the dynamic behaviour of glaciers in the glaciated basin of Himalaya?”.
Glacier and Glacial Lake Inventory
Regular mapping and updation of glacier inventory in the poorly observed region becomes a pre-requisite to understand the impact of climate change on glaciers. A number of studies provide worldview glacier inventory including the entire Himalayan region e.g. RGI, ICIMOD, GSI and GLOBGlacier and GAMDAM and facilitate glaciological and hydrological applications (e.g. modeling studies). However, recent studies have reported a number of issues related to the accuracy of glacier outlines of these inventories which requires to examine, evaluate and update all these at basin scale with supplement of field checks. In my research, I discussed existing issues in current inventories and recommends key notes accordingly in context to accuracy and applicability.
- Glacier changes in the Ravi basin, north-western Himalaya (India) during the last four decades (1971–2010/13). link
The characteristic of glacier surface cover is one of the critical factors to influence the glacier dynamics especially the fluctuations of glacier terminus. Recent studies reported the heterogeneity in glacier terminus change as higher for the clean ice-covered as compared to debris-covered glaciers across the Himalayan region. To look in to this matter, I analyse the frontal area and length changes for the glaciers with clean ice-covered, debris-covered and proglacial lakes in the glaciated basin of Himachal Himalaya.
- Monitoring frontal changes of the Shah Glacier in the Ravi basin, Himachal Himalaya (India) from 1965 to 2013. link
- Frontal changes in the Manimahesh and Tal Glaciers in the Ravi basin, Himachal Pradesh, northwestern Himalaya (India), between 1971 and 2013. link
- Heterogeneity in Fluctuations of Glacier with Ice-cover, Debris-cover and Proglacial-lake in the Upper Ravi Basin, Himachal Himalaya (India) During the Past Four Decades (1971-2013).link
Glacial Landscapes and Reconstruct Quaternary glacial extent
The landscape evolution due to past glaciation in the glaciated basin of Himalaya is currently not fully understood, although the erosion/uplift feedback mechanism is now recognized as a likely primary controlling factor along with the role of fluvial process in landscape evolution. In this context, I analysis the spatial distribution of Quaternary glacial landforms by using latest techniques of Geo-informatics, Geo-mophometery and Computer models with supplement of field measurements. Moreover, with having sub-objectives to assess a multitude of processes that are responsible for erosion, transportation and sedimentation by way of glacier and hillslope in particular and by river in general; to evaluate the impact of glacial erosion on the mountain topography; propose a conceptual model of landscape evolution for the upper Ravi basin based on analytical data; and to understand the role of long term temporal changes in the summer monsoon and mid-latitude westerlies in the driving of past glaciation in the glaciated basins of Himalaya.
- Studies on Quaternary Glaciations in India during 2010-2016’, Proceedings of the Indian National Science Academy. link
- Factors responsible for driving the glaciation in the Sarchu Plain, eastern Zanskar Himalaya, during the late Quaternary. link
- Late Holocene Glacier Dynamics in the Miyar Basin, Lahul Himalaya, India link
Geomorphic characteristics of the glaciated basin
Systematic analyses of the landforms help to unravel the tectonic and climate history of a region. With this consideration, during my Ph.D., I addressed another pertinent research question i.e. “What are the geomorphic characteristics of the glaciated basin in the Himalayas” and further to identify factors and process responsible for relative role of landscape modification resulting from geomorphic process (Glacial vis-à-vis fluvial) and tectonically or seismically induced mass movements along with mapping, visualisation, segmentation of neotectonic areas and analyses of spatial distribution of glacial and fluvial erosional morphology in overall impacts on the basin landscape evolution.
Other Research Interests