JKPSC Prelims 2024
General Studies (Paper 1)
Answer & Explanation
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Correct Answer:
Option B —
Tree ring data
The word is derived from three Greek roots:Dendros: Tree
Khronos: Time
Logia: Study
Dendroclimatology is the science of determining past climates from the annual growth rings of trees.
Why it works:
Annual Growth: Most trees in temperate and some tropical regions add one ring per year.
Climate Sensitivity: The thickness, density, and chemical composition of these rings depend on the environmental conditions (temperature, rainfall, and soil moisture) during that specific growing season.
Historical Record: By analyzing these rings, scientists can reconstruct local climate patterns dating back hundreds or even thousands of years, long before man-made weather instruments existed.
Comparison with other options:
Ice core data (C): Known as Glaciology (or Paleoclimatology using ice cores). It involves drilling into glaciers to analyze trapped air bubbles.
Paleomagnetism (D): The study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials.
Soil moisture (A): Usually studied via Hydrometeorology or soil science.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
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