The India Meteorological Department (IMD) is an agency of the
Ministry of Earth Sciences
The Ministry of Earth Sciences was formed on 29 January 2006 from a merger of the India Meteorological Department (IMD), the National Centre for Medium Range Weather Forecasting (NCMRWF), the Indian Institute of Tropical Meteorology (IITM), Pune ...
of the
Government of India
The Government of India (ISO: ; often abbreviated as GoI), known as the Union Government or Central Government but often simply as the Centre, is the national government of the Republic of India, a federal democracy located in South Asia, c ...
. It is the principal agency responsible for
meteorological observations,
weather forecasting
Weather forecasting is the application of science and technology forecasting, to predict the conditions of the Earth's atmosphere, atmosphere for a given location and time. People have attempted to predict the weather informally for millennia a ...
and
seismology
Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other ...
. IMD is headquartered in
Delhi
Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, primarily its western or right bank, Delhi shares borders w ...
and operates hundreds of observation stations across India and Antarctica. Regional offices are at
Chennai
Chennai (, ), formerly known as Madras ( the official name until 1996), is the capital city of Tamil Nadu, the southernmost Indian state. The largest city of the state in area and population, Chennai is located on the Coromandel Coast of th ...
,
Mumbai
Mumbai (, ; also known as Bombay — the official name until 1995) is the capital city of the Indian state of Maharashtra and the ''de facto'' financial centre of India. According to the United Nations, as of 2018, Mumbai is the second- ...
,
Kolkata
Kolkata (, or , ; also known as Calcutta , the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River west of the border with Bangladesh. It is the primary business, comme ...
,
Nagpur
Nagpur (pronunciation: Help:IPA/Marathi, aːɡpuːɾ is the third largest city and the winter capital of the Indian state of Maharashtra. It is the 13th largest city in India by population and according to an Oxford's Economics report, Nag ...
,
Guwahati
Guwahati (, ; formerly rendered Gauhati, ) is the biggest city of the Indian state of Assam and also the largest metropolis in northeastern India. Dispur, the capital of Assam, is in the circuit city region located within Guwahati and is the ...
and
New Delhi
New Delhi (, , ''Naī Dillī'') is the capital of India and a part of the National Capital Territory of Delhi (NCT). New Delhi is the seat of all three branches of the government of India, hosting the Rashtrapati Bhavan, Parliament House ...
.
IMD is also one of the six
Regional Specialised Meteorological Centre
A Regional Specialized Meteorological Centre (RSMC) is responsible for the distribution of information, advisories, and warnings regarding the specific program they have a part of, agreed by consensus at the World Meteorological Organization as p ...
s of the
World Meteorological Organisation
The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics.
The WMO originated from the Internatio ...
. It has the responsibility for forecasting, naming and distribution of warnings for
tropical cyclone
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
s in the Northern Indian Ocean region, including the
Malacca Straits
The Strait of Malacca is a narrow stretch of water, 500 mi (800 km) long and from 40 to 155 mi (65–250 km) wide, between the Malay Peninsula (Peninsular Malaysia) to the northeast and the Indonesian island of Sumatra to the southwest, connec ...
, the
Bay of Bengal
The Bay of Bengal is the northeastern part of the Indian Ocean, bounded on the west and northwest by India, on the north by Bangladesh, and on the east by Myanmar and the Andaman and Nicobar Islands of India. Its southern limit is a line between ...
, the
Arabian Sea
The Arabian Sea ( ar, اَلْبَحرْ ٱلْعَرَبِيُّ, Al-Bahr al-ˁArabī) is a region of the northern Indian Ocean bounded on the north by Pakistan, Iran and the Gulf of Oman, on the west by the Gulf of Aden, Guardafui Channel ...
and the
Persian Gulf
The Persian Gulf ( fa, خلیج فارس, translit=xalij-e fârs, lit=Gulf of Persis, Fars, ), sometimes called the ( ar, اَلْخَلِيْجُ ٱلْعَرَبِيُّ, Al-Khalīj al-ˁArabī), is a Mediterranean sea (oceanography), me ...
.
History
In 1686,
Edmond Halley
Edmond (or Edmund) Halley (; – ) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720.
From an observatory he constructed on Saint Helena in 1676–77, H ...
published his treatise on the Indian summer
monsoon
A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscil ...
, which he attributed to a seasonal reversal of winds due to the differential heating of the Asian landmass and the Indian Ocean. The first meteorological observatories were established in India by the
British East India Company
The East India Company (EIC) was an English, and later British, joint-stock company founded in 1600 and dissolved in 1874. It was formed to trade in the Indian Ocean region, initially with the East Indies (the Indian subcontinent and Southea ...
. These included the Calcutta Observatory in 1785, the
Madras Observatory
The Madras Observatory was an astronomical observatory which had its origins in a private observatory set up by William Petrie in 1786 and later moved and managed by the British East India Company from 1792 in Madras (now known as Chennai). The ...
in 1796 and the
Colaba Observatory
Colaba Observatory, also known as the Bombay Observatory, was an astronomical, timekeeping, geomagnetic and meteorological observatory located on the Island of Colaba, Mumbai (Bombay), India.
History
The Colaba Observatory was built in 1826 by t ...
in 1826. Several other observatories were established in India during the first half of the 19th century by various provincial governments.
The Asiatic Society
The Asiatic Society is a government of India organisation founded during the Company rule in India to enhance and further the cause of "Oriental research", in this case, research into India and the surrounding regions. It was founded by the p ...
, founded in
Calcutta
Kolkata (, or , ; also known as Calcutta , List of renamed places in India#West Bengal, the official name until 2001) is the Capital city, capital of the Indian States and union territories of India, state of West Bengal, on the eastern ba ...
in 1784 and in
Bombay
Mumbai (, ; also known as Bombay — the official name until 1995) is the capital city of the Indian state of Maharashtra and the ''de facto'' financial centre of India. According to the United Nations, as of 2018, Mumbai is the second- ...
in 1804, promoted the study of meteorology in India.
Henry Piddington
Henry Piddington (7 January 1797 – 7 April 1858) was an English sea captain who sailed in East India and China and later settled in Bengal where he worked as a curator of a geological museum and worked on scientific problems, and is particular ...
published almost 40 papers dealing with
tropical storms
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Dependi ...
from Calcutta between 1835 and 1855 in ''The Journal of the Asiatic Society''. He also coined the term ''
cyclone
In meteorology, a cyclone () is a large air mass that rotates around a strong center of low atmospheric pressure, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere as viewed from above (opposite to an anti ...
'', meaning the coil of a snake. In 1842, he published his landmark thesis, ''Laws of the Storms''.
After a
tropical cyclone
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
hit
Calcutta
Kolkata (, or , ; also known as Calcutta , List of renamed places in India#West Bengal, the official name until 2001) is the Capital city, capital of the Indian States and union territories of India, state of West Bengal, on the eastern ba ...
in 1864, and the subsequent
famines
A famine is a widespread scarcity of food, caused by several factors including war, natural disasters, crop failure, population imbalance, widespread poverty, an economic catastrophe or government policies. This phenomenon is usually accompan ...
in 1866 and 1871 due to the failure of the monsoons, it was decided to organise the collection and analysis of meteorological observations under one roof. As a result, the India Meteorology Department was established in 15 January 1875.
Henry Francis Blanford
Henry Francis Blanford (sometimes spelt Blandford) (3 June 1834 – 23 January 1893) was a British meteorologist and Paleontology, palaeontologist who worked in India. He was a younger brother of the Natural history, naturalist William Thomas B ...
was appointed the first Meteorological Reporter of the IMD. In May 1889,
Sir John Eliot was appointed the first ''Director General of Observatories'' in the erstwhile capital, Calcutta. The IMD headquarters were later shifted to
Shimla
Shimla (; ; also known as Simla, List of renamed Indian cities and states#Himachal Pradesh, the official name until 1972) is the capital and the largest city of the States and union territories of India, northern Indian state of Himachal Prade ...
in 1905, then to
Pune
Pune (; ; also known as Poona, (List of renamed Indian cities and states#Maharashtra, the official name from 1818 until 1978) is one of the most important industrial and educational hubs of India, with an estimated population of 7.4 million ...
in 1928 and finally to
New Delhi
New Delhi (, , ''Naī Dillī'') is the capital of India and a part of the National Capital Territory of Delhi (NCT). New Delhi is the seat of all three branches of the government of India, hosting the Rashtrapati Bhavan, Parliament House ...
in 1944.
IMD became a member of the World Meteorological Organisation after
independence
Independence is a condition of a person, nation, country, or state in which residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over its territory. The opposite of independence is the statu ...
on 27 April 1949.
The agency has gained in prominence due to the significance of the monsoon rains on
Indian agriculture. It plays a vital role in preparing the annual monsoon forecast, as well as in tracking the progress of the monsoon across India every season.
Organisation
The IMD is headed by the ''Director General of Meteorology'', currently Dr. Mrutyunjay Mohapatra
. IMD has six ''Regional Meteorological Centre''s, each under a Deputy Director General. These are located in
Chennai
Chennai (, ), formerly known as Madras ( the official name until 1996), is the capital city of Tamil Nadu, the southernmost Indian state. The largest city of the state in area and population, Chennai is located on the Coromandel Coast of th ...
,
Guwahati
Guwahati (, ; formerly rendered Gauhati, ) is the biggest city of the Indian state of Assam and also the largest metropolis in northeastern India. Dispur, the capital of Assam, is in the circuit city region located within Guwahati and is the ...
, Kolkata, Mumbai, Nagpur and New Delhi. There is also a Meteorological Centre in each state capital. Other IMD units such as Forecasting Offices, Agrometeorological Advisory Service Centers, Hydro-meteorological Office, Flood Meteorological Offices, Area Cyclone Warning Centers and Cyclone Warning Centers are usually co-located with various observatories or meteorological center.
IMD operates a network of hundreds of surface and glacial observatories, Upper Air (high altitude) stations,
ozone
Ozone (), or trioxygen, is an inorganic molecule with the chemical formula . It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope , breaking down in the lo ...
and radiation observatories and
meteorological radar stations. Additional data is received from India's constellation of satellites, such as
Kalpana-1
Kalpana-1 was the first dedicated meteorological satellite launched by Indian Space Research Organisation using Polar Satellite Launch Vehicle on 12 September 2002. The satellite is three-axis stabilized and is powered by solar panels, getting u ...
,
Megha-Tropiques
Megha-Tropiques was a satellite mission to study the water cycle in the tropical atmosphere in the context of climate change. A collaborative effort between Indian Space Research Organisation ( ISRO) and French Centre National d’Etudes Spatial ...
and instruments on board the
IRS series
India's remote sensing program was developed with the idea of applying space technologies for the benefit of humankind and the development of the country. The program involved the development of three principal capabilities. The first was to desi ...
and the
INSAT
The Indian National Satellite System or INSAT, is a series of multipurpose geostationary satellites launched by ISRO to satisfy the telecommunications, broadcasting, meteorology, and search and rescue operations. Commissioned in 1983, INSAT i ...
series of satellites.
Data and observations are also reported into the IMD network from meteorological instruments on board Indian merchant marine and
Indian Navy
The Indian Navy is the maritime branch of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Navy. The Chief of Naval Staff, a four-star admiral, commands the navy. As a blue-water navy, it operates sig ...
ships. IMD was the first organisation in India to deploy a message switching computer for supporting its global data exchange.
IMD collaborates with other agencies such as the
Indian Institute of Tropical Meteorology
The Indian Institute of Tropical Meteorology (IITM) is a scientific institution based in Pune, Maharashtra, India for expanding research in the tropical Indian Ocean with special reference to monsoon meteorology, and air-sea interaction of Sout ...
,
National Centre for Medium Range Weather Forecasting
National Centre for Medium Range Weather Forecasting (NCMRWF) is a national agency for weather forecasting under the Ministry of Earth Sciences, (transferred from its former parent Ministry of Science and Technology), Government of India.
It is ...
and the
National Institute of Ocean Technology
The National Institute of Ocean Technology (NIOT) was established in November 1993 as an autonomous society under the Ministry of Earth Sciences in India. NIOT is managed by a Governing Council and is headed by a director. The institute is bas ...
.
IMD also operates seismic monitoring centres at key locations for earthquake monitoring and measurements.
Tasks
IMD undertakes observations, communications, forecasting and weather services. In collaboration with the
Indian Space Research Organisation
The Indian Space Research Organisation (ISRO; ) is the national space agency of India, headquartered in Bengaluru. It operates under the Department of Space (DOS) which is directly overseen by the Prime Minister of India, while the Chairman ...
, the IMD also uses the
IRS series
India's remote sensing program was developed with the idea of applying space technologies for the benefit of humankind and the development of the country. The program involved the development of three principal capabilities. The first was to desi ...
and the
Indian National Satellite System
The Indian National Satellite System or INSAT, is a series of multipurpose geostationary satellites launched by ISRO to satisfy the telecommunications, broadcasting, meteorology, and search and rescue operations. Commissioned in 1983, INSAT i ...
(INSAT) for weather monitoring of the
Indian subcontinent
The Indian subcontinent is a list of the physiographic regions of the world, physiographical region in United Nations geoscheme for Asia#Southern Asia, Southern Asia. It is situated on the Indian Plate, projecting southwards into the Indian O ...
. IMD was first weather bureau of a developing country to develop and maintain its own satellite system.
IMD is one of the six worldwide
Regional Specialised Meteorological Centre
A Regional Specialized Meteorological Centre (RSMC) is responsible for the distribution of information, advisories, and warnings regarding the specific program they have a part of, agreed by consensus at the World Meteorological Organization as p ...
s of the Tropical Cyclone Programme of the World Weather Watch of the
World Meteorological Organization
The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics.
The WMO originated from the Internati ...
.
It is regional nodal agency for forecasting, naming and disseminating warnings about
tropical cyclone
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
in the Indian Ocean north of the
Equator
The equator is a circle of latitude, about in circumference, that divides Earth into the Northern and Southern hemispheres. It is an imaginary line located at 0 degrees latitude, halfway between the North and South poles. The term can als ...
.
New initiatives
The IMD launched System of Aerosol Monitoring and Research (SAMAR) in January 2016 to study the concentration of
Black carbon
Chemically, black carbon (BC) is a component of fine particulate matter (PM ≤ 2.5 µm in aerodynamic diameter). Black carbon consists of pure carbon in several linked forms. It is formed through the incomplete combustion of fossil fue ...
, radiative properties of
aerosol
An aerosol is a suspension (chemistry), suspension of fine solid particles or liquid Drop (liquid), droplets in air or another gas. Aerosols can be natural or Human impact on the environment, anthropogenic. Examples of natural aerosols are fog o ...
s, environmental visibility and their climatological impacts. It would contain a network of 16
aethalometer
An aethalometer is an instrument for measuring the concentration of optically absorbing (‘black’) suspended particulates in a gas colloid stream; commonly visualized as smoke or haze, often seen in ambient air under polluted conditions. The ...
s, 12 sky radiometers and 12
nephelometer
A nephelometer or aerosol photometer is an instrument for measuring the concentration of suspended particulates in a liquid or gas colloid. A nephelometer measures suspended particulates by employing a light beam (source beam) and a light dete ...
s.
Further reading
*
References
{{authority control
Ministry of Earth Sciences
Governmental meteorological agencies in Asia
1875 establishments in India
Government agencies established in 1875