Climate Change Impact on Glacier Retreat and Local Community in the Langtang Valley, Central Nepal

Abstract

Global warming leading to climate change is a rapidly growing global threat to humanity
and environment of the world. The present research in the Langtang Valley, Central Nepal
attempts to find out the impact of climate change on glacier retreat and local community
based on the studies of available long-term hydrological-meteorological data, satellite
image analysis of glaciers from 1979 to 2009, and observation of local people and their
experience on climate change issues. The high altitude areas of the Langtang Valley show a
consistent trend of increase in temperature, a clear evidence of the global warming that has
resulted in the fast melting of glaciers with both horizontal and vertical retreats. The Lirung
Glacier and the Kimjung Glacier have retreated for over 900 metre and 400 metre,
respectively, with an average retreat of about 40 metre/year and total vertical retreat in the
snout position is 100 metre for both. The study also reveals that this glacier retreat is due to
an increase in temperature and a change in patterns of precipitation and snowfall. The study
also shades light on some socio-economic impacts of such changes on the livelihood of
marginal communities residing downstream the affected areas.