PYQ Relevance:

Question: How does the melting of the Arctic ice and glaciers of the Antarctic differently affect the weather patterns and human activities on the Earth? Explain. (UPSC 2021)

Reason:  It addresses the broader impact of melting ice on weather patterns and human activities, a theme relevant to the permafrost thaw in the Himalayas.

What is Permafrost?

Permafrost is ground—comprising soil, rock, or sediment—that remains continuously frozen for at least two years. It is found in high-altitude and polar regions, stores carbon, and supports unique ecosystems. However, rising global temperatures are causing it to thaw, leading to infrastructure damage, greenhouse gas emissions, and environmental disruptions.

Where is permafrost most extensively found in Jammu & Kashmir and Ladakh?

• Ladakh Plateau & Karakoram Range: Cold-arid climate with high-altitude plateaus and glaciated mountains supports extensive permafrost. Example: Nubra Valley and Changthang Plateau have widespread permafrost due to sub-zero temperatures year-round.
• Drass & Zanskar Region: Known as the “Gateway to Ladakh,” Drass is one of the coldest inhabited places in India. Example: Drass (often recording temperatures below -30°C) and Zanskar Valley exhibit permafrost in high-altitude zones.
• Upper Indus River Basin: The cold, high-altitude valleys along the Indus River, particularly in the Leh region, have significant permafrost. Example: Permafrost is found in areas along the Indus near Leh, impacting groundwater storage and hydrology.
• Siachen Glacier & Surrounding Areas: One of the highest and coldest battlefields in the world, sustaining year-round permafrost. Example: Permafrost is critical in maintaining the stability of the Siachen Glacier and surrounding military outposts.
• Higher Reaches of Kargil: Some parts of Kargil, particularly in remote high-altitude areas, experience permafrost conditions. Example: Permafrost is found in higher elevations of Kargil, but lower valleys may lack continuous permafrost.

Which regions lack permafrost coverage?

• Kashmir Valley (Srinagar, Anantnag, Baramulla): Relatively lower altitude with temperate climate prevents permafrost formation. Example: Srinagar, despite cold winters, does not have permafrost due to warmer summer temperatures.
• Jammu Region (Jammu, Udhampur, Kathua): Lower altitude and subtropical climate make permafrost formation impossible. Example: Jammu city has hot summers and mild winters, ruling out any permafrost presence.
• Pir Panjal Range: Lower altitude than the Greater Himalayas, experiencing seasonal snow rather than permanent permafrost. Example: Gulmarg and Poonch receive heavy snowfall but do not sustain permafrost.
• Chenab and Jhelum River Valleys: Warmer valley temperatures prevent permafrost formation, though higher peaks may have seasonal ice. Example: Areas like Pahalgam and Kupwara experience snow cover but lack permafrost due to fluctuating temperatures.
• Lower Altitudes of Kargil and Leh: While upper reaches have permafrost, lower valleys experience enough summer warmth to prevent it. Example: Kargil town itself does not have permafrost, but surrounding mountains do.

What are the steps taken by the government? 

• Monitoring and Research Initiatives: The Indian government, in collaboration with research institutions like the Defence Geoinformatics Research Establishment (DGRE) and Wadia Institute of Himalayan Geology (WIHG), is conducting studies on permafrost dynamics in Ladakh and Jammu & Kashmir. Example: DGRE has set up monitoring stations in Drass, Kargil, and Siachen to study permafrost stability and assess risks to infrastructure.
• Climate Resilient Infrastructure Development: The Border Roads Organisation (BRO) is adopting new engineering techniques, such as thermosyphons and insulated road layers, to prevent permafrost degradation in road and tunnel construction. Example: In the construction of the Zojila Tunnel, special insulation techniques are being used to minimize heat impact on permafrost.
• Afforestation and Sustainable Land Management: Programs under CAMPA (Compensatory Afforestation Management and Planning Authority) and National Mission on Himalayan Studies (NMHS) aim to restore vegetation cover, which helps maintain permafrost stability. Example: Reforestation efforts in Changthang Wildlife Sanctuary and Ladakh’s high-altitude areas help in reducing soil erosion and insulating the permafrost layer.