DAILY CURRENT AFFAIRS IAS | UPSC Prelims and Mains Exam – 21st February 2025
Archives (PRELIMS & MAINS Focus) GLOBAL SEA ICE COVER Syllabus: Prelims & Mains – ENVIRONMENT Context: Global sea ice cover reached a record low of 15.76 million sq km over the five days leading up to February 13, surpassing the previous low of 15.93 million sq km recorded in January-February 2023. Background: – Sea ice refers to the free-floating ice in the polar regions. While it generally expands during the winter and melts in the summers, some sea ice remains year-round. Note that this is different from icebergs, glaciers, ice sheets, and ice shelves, which form on land. Key takeaways Experts suggest that the 2025 low could be due to a combination of warm air, warm seas and winds breaking apart the ice. Antarctic sea ice is particularly vulnerable to ice-breaking winds. Unlike Arctic ice, it is surrounded by the ocean instead of continents and is thus more mobile, and also comparatively thinner. The situation has been made worse this year due to warmer air and warmer waters towards the end of the southern hemisphere summer (December to February). Higher air temperatures led to the melting of the edges of the Antarctic ice sheet — also known as ice shelves — which extend over the ocean. In the Arctic, where winter lasts from November to February, sea ice remained low because of a delayed freezing around the Hudson Bay, a large saltwater body in northeastern Canada. The delay occurred as unusually warm oceans took a longer time to cool down. The region also witnessed some storms which broke apart ice around the Barents Sea, located off the northern coasts of Norway and Russia, and the Bering Sea, the stretch between Alaska and Russia. Higher than usual air temperatures in areas such as Svalbard, Norway, resulted in further loss of sea ice. What dip means Less sea ice cover means that more water is getting exposed to the Sun and more heat (solar radiation) is getting absorbed, leading to a further rise in temperatures. Notably, sea ice keeps temperatures down in the polar regions, as its bright, white surface reflects more sunlight back to space than liquid water. The loss of sea ice cover could be one of the reasons why the polar regions are getting warmer at a faster rate than the rest of the world. Source: Indian Express MAJORANA 1 Syllabus: Prelims & Mains – SCIENCE & TECHNOLOGY Context: Microsoft has announced a new chip, called Majorana 1, that it said showed quantum computing is “years, not decades” away, joining Google and IBM in predicting that a fundamental change in computing technology is closer than believed. Background: – Quantum computing holds the promise of carrying out calculations that would take today’s systems millions of years and could unlock important discoveries in medicine, chemistry, and aerospace, among others. Key takeaways Majorana 1 is a groundbreaking quantum computing chip developed by Microsoft. Microsoft’s breakthrough revolves around engineering a new type of particle known as Majorana. These Majorana particles have been fabricated using topological conductors and they exist in a topological state, which differs from traditional states of matter such as solid, liquid, and gas. First theorised over 80 years ago by Italian physicist Ettore Majorana, Majorana fermions are particles that are their own anti-particles. But, there was no physical evidence of such particles. Key Features Topological Quantum Bits: Majorana 1 integrates eight topological qubits, which are more stable and less prone to errors compared to traditional qubits. Topological Conductors: Utilizes a new type of material called topoconductors to observe and control Majorana particles, enhancing the reliability and scalability of qubits. Compact Design: The chip is compact, about the size of a sticky note, yet powerful enough to be a stepping stone towards systems capable of supporting a million qubits. Applications Industrial-Scale Problems: Designed to solve meaningful, industrial-scale problems in fields such as medicine, pollution control, and materials science. Future Potential: Microsoft envisions Majorana 1 as a path to developing quantum systems that can scale to a million qubits, enabling transformative solutions. Significance Quantum Leap: Represents a significant advancement in quantum computing, potentially revolutionizing various industries. Error Resistance: The use of Majorana fermions makes the chip highly stable and resistant to errors, a major challenge in quantum computing. Source: The Hindu CONSUMPTION, INVESTMENT AND GROWTH Syllabus: Prelims & Mains – ECONOMY Context: The role of consumption and investment in driving growth has been a topic of debate. In the latest Budget, the government has not demonstrated a strong commitment to boosting investment. Instead, the emphasis on tax concessions and restrained public spending suggests a reliance on consumption to drive growth. Background: An economy’s growth depends on two factors. One is the supply or the production of goods and services, and the other is the demand or expenditure for purchasing these goods and services. Key takeaways The demand or aggregate expenditure in an economy comes from four sources. First is private consumption, which is the sum of expenditures by all individuals on items such as food, clothing, and mobile phones. Second is private investment, which is the amount spent by firms and households on installing new machines and constructing new factories or residences. Third is government expenditure, for consumption and investment. Fourth is net exports or exports minus import of goods and services while engaging in trade with the rest of the world. Investment and its multipliers Among the sources of demand, investment stands out for its ‘multiplier effects’. That is, an increase in investment of ₹100 could increase the economy’s overall demand and GDP by more than ₹100 — let us say by ₹125. Consider public investment in building a new highway. The incomes received by workers and firms involved in the project will generate fresh demand in the economy. The highways will trigger the establishment of new industries, all of which translate into a much bigger expansion of aggregate demand. Compared to investment, the multiplier effect from increased consumption is weaker. If incomes increase, consumption expenditures also increase, but the
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