gs1
150 Words10 Marks
Q.Mention the global occurrence of volcanic eruptions in 2021 and their impact on the regional environment.
UPSC Mains 2021•Geography
Model Answer
View this Question In PYQ RealmIntroduction
Volcanic eruptions involve the release of lava, ash, and gases from the Earth's interior. In 2021, several major eruptions occurred globally, leaving significant footprints on their regional environments.
Body
Global Occurrences in 2021:
- Hunga Tonga-Hunga Ha'apai: A massive submarine volcanic eruption in December 2021 in the South Pacific.
- Taal Volcano: Located near Manila, Philippines, it experienced active eruptive phases.
- Mount Nyiragongo: A highly destructive eruption in the Democratic Republic of Congo, causing displacement and casualties.
- Fagradalsfjall (Iceland): Erupted in 2021, covering valleys with extensive basaltic lava flows.
- La Palma (Canary Islands): A prolonged, explosive eruption that caused widespread destruction of property and local ecosystems.
Environmental Impacts:
- Geomorphological Changes: Eruptions create new landforms and deposit fresh rock layers on the Earth's surface.
- Climatic Influence: The injection of sulfur dioxide and ash into the stratosphere can reflect solar radiation, causing temporary regional or global cooling.
- Greenhouse Gas Emissions: Over geological timescales, volcanic outgassing of CO2 and water vapor has contributed to global warming trends.
- Widespread Dispersion: Winds transport volcanic ash, dust, and toxic gases across vast distances, affecting air quality and solar radiation levels.
- Seismic Activity: Eruptions are typically accompanied by localized earthquakes and ground deformation.
Conclusion
While volcanic eruptions are inevitable natural events concentrated largely along tectonic boundaries like the Pacific Ring of Fire, robust monitoring and disaster mitigation strategies are essential to minimize their regional impact.