In Today’s News:
- Current Account Surplus.
- National Crisis Management Committee.
- Cyclone Nivar likely to hit Tamilnadu.
1. Current Account Surplus
Chief Economic Adviser Shri. Krishnamurthy Subramanian said that India is likely to record Current Account Surplus during the Financial Year 2021. COVID crisis is different from other market crisis. During other market crises, imports will exceed than the exports showing over-heating signs whereas, in the COVID crisis, the economy is showing a sign of ‘under-heating’.
Prelims GS – Economic Development
Current Account Surplus:
- The current account measures a country’s imports and exports of goods and services over a defined period of time, in addition to earnings from cross-border investments, and transfer payments.
- Current account surplus refers to a country that has more exports than imports of goods and services.
- It is usually considered a positive sign in the economy.
- Low domestic demand or drop in imports due to a recession may also contribute to Current Account Surplus.
2. National Crisis Management Committee
Cabinet Secretary Shri. Rajiv Gauba chaired a meeting of the National Crisis Management Committee (NCMC) to review the status of the impending cyclone with the Chief Secretaries of Andhra Pradesh, Tamil Nadu, and Puducherry through video conferencing.
Prelims GS – Governance/Disaster Management
- National Crisis Management Committee is under the Chairmanship of the Cabinet Secretary of India.
- It is responsible for overseeing the management of the crisis in the country during natural disasters like cyclones, Tsunami, Floods, etc., and other man-made disasters like Gas leaks, Chemical leaks, etc.
- It is also responsible for the effective coordination and implementation of relief measures and operations.
3. Cyclone Nivar likely to hit Tamilnadu
Cyclonic storm found in the Bay of Bengal will soon become a severe cyclonic storm and will bring heavy rainfall to Tamilnadu and Puducherry regions. The Cyclone has been named Nivar and is likely to cross between Karaikal and Mamallapuram coasts.
(NOTE: The contents of the Cyclone have been taken from NDMA’s official website so as to facilitate for exam point of view.)
Prelims GS – Geography
- Cyclones are caused by atmospheric disturbances around a low-pressure area distinguished by swift and often destructive air circulation.
- Cyclones are usually accompanied by violent storms and bad weather.
- The air circulates inward in an anticlockwise direction in the Northern hemisphere and clockwise in the Southern hemisphere.
- Cyclones are classified as: (i) extratropical cyclones (also called temperate cyclones); and (ii) tropical cyclones.
- In India, cyclones are classified by:
- Strength of associated winds,
- Storm surges
- Exceptional rainfall occurrences.
Different names of cyclones:
- Typhoons – China Sea and Pacific Ocean
- Hurricanes – West Indian islands in the Caribbean Sea and the Atlantic Ocean
- Tornados – Guinea lands of West Africa and southern USA.
- Willy-willies – north-western Australia and
- Tropical cyclones – Indian Ocean.
Mains GS1 – Geography
How Cyclones are formed
The development cycle of tropical cyclones may be divided into three stages:
Formation and Initial Development Stage
The formation and initial development of a cyclonic storm depend upon various conditions. These are:
- A warm sea (a temperature in excess of 26 degrees Celsius to a depth of 60 m) with the abundant and turbulent transfer of water vapor to the overlying atmosphere by evaporation.
- Atmospheric instability encouraging the formation of massive vertical cumulus clouds due to convection with the condensation of rising air above the ocean surface.
Mature Tropical Cyclones
- When a tropical storm intensifies, the air rises in vigorous thunderstorms and tends to spread out horizontally at the tropopause level.
- Once air spreads out, a positive perturbation pressure at high levels is produced, which accelerates the downward motion of air due to convection.
- With the inducement of subsidence, the air warms up by compression and a warm ‘Eye’ is generated. (2020 UPSC Prelims Question)
- Generally, the ‘Eye’ of the storms has three basic shapes: (i) circular; (ii) concentric; and (iii) elliptical. The main physical feature of a mature tropical cyclone in the Indian Ocean is a concentric pattern of highly turbulent giant cumulus thundercloud bands.
Modification and Decay
- A tropical cyclone begins to weaken in terms of its central low pressure, internal warmth, and extremely high speeds, as soon as its source of warm moist air begins to ebb, or is abruptly cut off.
- This happens after its landfall or when it passes over cold waters.
- The weakening of a cyclone does not mean that the danger to life and property is over.
Other features of Cyclones:
- Cyclones vary in diameter from 50 to 320 km but their effects dominate thousands of square kilometers of the ocean surface and the lower atmosphere.
- The perimeter may measure 1,000 km but the powerhouse is located within a 100-km radius.
- Nearer the Eye, winds may hit at a speed of 320 km.
Click here to know more about Cyclones and other natural hazards on NDMA official website.
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