Little Ice Age (LIA)

Santhosh Kumar 25/10/2023

Little Ice Age (LIA) upsc mind map
Study of global climatic event (1671-1942)
Source: PIB
Challenges traditional perception
Used pollen-based vegetation data
Western Ghats (1219-1942)
Key Findings
Not uniformly cold and dry
Significant rainfall variations
Influence of northeast winter monsoon (NEM)
Created moist or wet LIA
Impact of various factors on climate
Northward movement of Inter Tropical Convergence Zone (ITCZ)
Positive temperature anomalies
Increased sunspot numbers
High solar activity
Relevance
Develop paleoclimatic models
Aid future climate predictions & policy planning
Understand Indian Summer Monsoon (ISM)
Variability during the Holocene
Cause
Combination of factors
Cooling from volcanic aerosols
Low solar activity
Producing lower surface temperatures

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