IMD to Crowdsource Weather Info and Commissions 4 New Doppler Radars

IMD to Crowdsource Weather Info and Commissions 4 New Doppler Radars
Current Affairs for UPSC IAS
Why this news is important?
  • This news is about IMD and its new methodology of crowdsourcing weather information also about installation of doppler radars.
  • As environmental science and climatology involve different facets of science so does this news.
  • Of course, this type of technological development is important for a nation and for aspirants of Civil Services it contains a number of areas from where questions can be asked.
How it is important for the Civil Services Examination: 
  • It is important for both Prelims and Mains Examination.
Headlines in the Leading Newspapers: 
  • We could figure it in the Indian Express and PIB
Relevance with syllabus of Civil Services Examination:
  • Prelims: Current development in Sc.& Tech 
  • Mains: Current development in Sc.& Tech, Disaster management, Environment
What is the Theme?
  • It’s about the unique initiative by the India Meteorological Department – crowdsourcing weather information on the IMD’s 147th Foundation Day.
  • Also, this article talks about  The IMD joining  hands with the Indian Space Research Organisation (ISRO) in designing and indigenously manufacturing doppler radars.
Previous Years' Questions
Prelims:
  • Although there will be many question in Prelims involving concepts of Radar, Doppler, different bands of communication; but we will see one which involves almost all the concept associated with the news.
CSE 2002
Consider the following statements: 
  1. Light of longer wavelength is scattered more than the light of shorter wavelength.
  2. The speed of visible light in water is 0.95 times the speed in vacuum.
  3. Radio waves are produced by rapidly oscillating electrical currents.
  4. To detect the over speeding vehicles, Police use the Doppler effect of reflected short radio Waves.
Which of these statements are correct?
(a) 1 and 2 
(b) 1 and 3
(c) 2 and 4 
(d) 3 and 4
 
Mains:
  • Even in Mains, if we extrapolate this news to other associated areas, the weather forecast can help in mitigating disaster, Agriculture etc. so you can use the achievement of this sort in beautifying your answer.
  • Here, we have taken one question that aptly suits the news.
CSE 2009
  • Bring out the significance of the various activities of the Indian Meteorological Department.
 
Question can be expected on:  
  • In Prelims, It can be on places of installation of radars, why Doppler radars are crucial, which band will be used, event of launch, associated department etc.
  • In Mains, it can be “ Enumerate the recent achievements/ developments of IMD in weather nowcasting”.
Gist of the NEWS:
Crowdsourcing weather information
  • The public participation platform is an example of what “citizen science” can be. 
    • People from across the country call or text local weather information to the IMD. 
    • They can click pictures of weather events in their areas on their phones and then upload them on the IMD platform. 
    • This will enhance the IMD’s database of information.
IMD commissions 4 new doppler radars in Leh, Delhi, Mumbai & Chennai 
  • THE INDIA Meteorological Department (IMD) commissioned four doppler weather radars, including an X-band radar in Leh that is installed at the highest altitude anywhere in the country. 
  • Delhi got its third doppler radar in the form of an X-band radar at Ayanagar. It has a radius of 100km around the NCR.
  • Presently, radars are also operational at Palam and Mausam Bhavan.
  • Mumbai got its second radar, a C-band radar at Veravalli, that covers a radius of 450-km around the city.
  • Similarly, the Met department operationalised an X-band radar covering a 150-km radius around Chennai, the third radar for the southern city.
Doppler Radars
  • Doppler radars help forecasters to observe rainfall, the advance of cloud formations over a region and subsequently monitoring thunderstorms and lightning in real-time. The radar operations are particularly crucial during extreme weather events like heavy rainfall and data from these are used in predicting flash floods in local regions.
  • With the latest additions, the IMD now has 33 operational radars in the country. 
  • In January 2021, two Doppler radars were commissioned in Himachal Pradesh and Uttarakhand.
  • The need for nowcast information (weather warning over three to six hours) is growing in the changing climate scenario when the frequency of extreme weather events is on a rise.  
  • Smart and urban cities will need more nowcast information.
  • At least, 90 radars will be needed to cover the entire geographical area of the country.
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