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Speaker: Dr. Atma Ram Jain

admin: Welcome all to today's chat on "Present Scenarion in Atmospheric Sciences" . Dr. Atma Ram Jain is here with us as an expert. Please ask your questions
Vivek Panwar: hello sir can i start questioning
Vivek:tropopause have different height at different places, why it is so?
Dr. Atma Ram Jain: hello Vivek, yes you can ask question to Dr. Jain
Vivek Panwar: how u define this present scenario of atmospheric sciences
Dr. Atma Ram Jain: Present Scenario is very exciting and future is very bright
Vivek Panwar: In India where we can start our future in atmospheric sciences means tell me the name of some good laboratories
Vivek Panwar: In India where we can start our future in atmospheric sciences means tell me the name of some good laboratories
Dr. Atma Ram Jain: There are number of excellent laboratories which covers the different components of Atmospheric Sciences including environmental studies so of the laboratories are
Dr. Atma Ram Jain: NEERI , NPL , PRL , NARL , SAC Ahemdabad, SPL Trivendrum, IIGM Mumbai, IITM Pune and NCMRWF Noida,
Dr. Atma Ram Jain: and so on
rishu gautam: good aftar noon sir
Dr. Atma Ram Jain: Rishi Good After noon
Vivek Panwar: What is the basic requirement to enter in these laboratories?
Dr. Atma Ram Jain: Ask your Question
rishu gautam: i am cofused about tropopause temperature. Can u please tell me the exact defination of Tropopause
rishu gautam: i am cofused about tropopause temperature. Can u please tell me the exact defination of Tropopause
Dr. Atma Ram Jain: Vivek, Most of the laboratories take students at masters level and provide a research fellowship programme for training and research for full time Job as a Scinetist, However a Phd Degree or Few years research experince with one or two publication would be helpful
Dr. Atma Ram Jain: Rishu, There are number of defination of tropopause but most commonly used defination are as follows
Vivek Panwar:Now a days Stratosphere troposphere exchange is an hot topic
Vivek Panwar: how can we define it
Dr. Atma Ram Jain: 1. Based on Lapes rate as given by WMO i.e tropopause is the level where the lapes rate is less then to 2 degree kelvin per kilometere and remain so for 2 more kilometer
Vivek Panwar: what is your opinion about greenhouse gas emission
Dr. Atma Ram Jain: This defination is most commonaly used by operational people
Dr. Atma Ram Jain: The second defination is based on CPT i.e lowest temparture obeserved of the tempratured profile
rishu gautam: what is WMO ?
Dr. Atma Ram Jain: Vivek, The tropopause is a temprature inversion layer but still there is some mass exchange does take place thorugh the tropopause, The mass exhande between troposhere and stratosphere aur between stratosphere and troposphere forms part of troposphere stratosphereic exchange studies
Vivek: What is potential vorticity?
Dr. Atma Ram Jain: Rishu, WMO stands for worl Metrological Organisation, This is UNO organisation which keep track of various matrological data and carries out validation of various data collected by the groups in different countries
Dr. Atma Ram Jain: Vivek, Potential Vorticity is a measure of roatation or circulation in terms of potential temprature
Vivek Panwar: what is the probable sources of tropospheric ozone???
Dr. Atma Ram Jain: Vivek, Green House gas emission have been like CO2 have been continiously growing at an alarming rate resulting in global climate change which is most evident from melting of galciour in arcetic , Antartica , Himalayas and Alps
Vivek: How can convection be studies for earlier periods with temperature data only
rishu gautam: what is anamoly ? and how will we define anamoly ?
Dr. Atma Ram Jain: if this continue we in our country will face serious problem of fresh water for drinking and agricultural purposes
Dr. Atma Ram Jain: Vivek, There are basicaly three sources of troposheric ozone, 1. local production , 2 leekage from the stratosphere that is tropopause and 3. horizental advection from the other regions of the world
brotati: Sir, What are scope in atmospheric sciences after class XII
Dr. Atma Ram Jain: Vivek, the sea surface temprature distribution can give some idea of the convective activity
mohit: hello sir
suresh: hello sir
Dr. Atma Ram Jain: higher sea surface temprature intense will be the convection, however monitoring of outgoing long wave radiation i.e OLR is a better way for study the convectivity
Vivek Panwar: What is the role of Indian tropics in STE
rishu gautam: what is anamoly ? and how will we define anamoly ?
Dr. Atma Ram Jain: Rishu, Anamoly in any parameter is just defined as a departure from the long term mean value of the parameter
Dr. Atma Ram Jain: brotati, After 12th you should go gor Graduation in Sciences with Physics , Math and Chemistry after graduation you can do MSc with Physics aur metrology or space science , I understand that Government of India encourages student to go for sciences and under talent search even provide scholarship for bright student
mohit: is there any satellite to study tropical weather and climate?
Vivek: Sir, is there any role of water vapour in decreasing ozone in stratosphere
Muneesh: Hi, Sir, I am Muneesh.
Vivek: Sir, is there any role of water vapour in decreasing ozone in stratosphere
Muneesh: Why is it so very difficult to predict weather? Why do we rely on statistical methods so much?
Dr. Atma Ram Jain: Vivek, tropics over india and in other longitute zone participates actively in strotosphereic and tropospheric exhange i.e STE this is because tropics are the sources region of intensed convection and cyclonic activity hence this region acts as a heat engine converting additional heat available over the tropics into mechanical energy in the form of intensed winds including very large vertical velocities, convecting activity thus carries the boundry layer air and lower troposhperic air to higher hieghts to the upper troposhpere and sometimes into the lower stratosphere
Dr. Atma Ram Jain: This air which is carried by the convection higher up by convectic and cyclonic activity is then carried over to Higher latitute by the ciruclation like Brewer Doption
Dr. Atma Ram Jain: Mohit , Yes there are number of statellite for this purpose india's Kalpana 1 is one such satellite
Vivek Panwar: What is radiative forcing?
Vivek Panwar: What is radiative forcing?
rishu gautam: what isdefference between potential temp. and Normal Temp.
Dr. Atma Ram Jain: Vivek, yes Increase in water vapour tends to delay the recovery of stratosphereic ozone and vice versa
rishu gautam: what is the defference between potential temp. and Normal Temp.
Vivek: Tropics being the source region of heat engine driving the enhanced vertical winds and enhances vertical winds are found in the most convective zone, is it so?
Dr. Atma Ram Jain: Muneesh,prediction of weather is so difficult because number of parameters and there variablity is involved , However with the improved instrumentation the accuracy of the data is improved, Now a days there is more dependence on the modeling aspect of the forcasting rather then the stastical parameter there is a good amount of success in predicting weather now for period of less than 5 days but periods higher than 5 days problem still persists beacuse that requires much more varsetile models for prediction
Dr. Atma Ram Jain: vivek,radiative forcing is the change in atmospheric parameters beacuse of the radiation energy at various hight levels
brotati: Sir, I would like to know the scope of atmospheric sciences after Class XII
Dr. Atma Ram Jain: Rishu, Potential temprature is defined in terms of standard pressure say 1000 mili bar where as the normal temprature is the actual atmospheric temprature measured by insitu instruments
Dr. Atma Ram Jain:Vivek, your can you put this question in a better way
Dr. Atma Ram Jain: brotati, I have replied your question
Muneesh: When do we use analytical methods for prediction of weather? When do we use statistical methods?
Dr. Atma Ram Jain: Vivek, that is true tropic being the source region
Vivek Panwar:What is radiative forcing
Dr. Atma Ram Jain: Muneesh, Statistical methods are used when actual observation data is limited other wise it is always desirable to use analytical methods and this is possible enhanced computational power avialble now for weather modeling
suresh: why atmosphere temprature change frequently?
Vivek Panwar: Is there any role of circulation cells(Hadley cell , ferrel cell, Polar) in STE
Muneesh: With global warming and climate change, what new approaches we shall need for prediction of Indian Monsson?
Dr. Atma Ram Jain: Suresh, Atmospheric temprature depends on many factors like topography radiation recieved and wind system etc. its a dynamical balance between various parameter and a temprature is one of them if it is very hot at a particuler location the hot air rises up resulting in decreaing pressure at that particular location and bringing cold air from the sides which immeditaly cools down the temprature this is what is atmospheric convection
Dr. Atma Ram Jain: Vivek, circulation plays an important role in atmospheric dynamism
Dr. Atma Ram Jain: Muneesh, we need to be very careful in monitoring various atmosphereic parameters build a long time series observation and then use analytical modeling techniques to predict or forcast of effect of global warming and climate change and inturn indian monsoon
Muneesh: Sir, how successful is the monsoon prediction model of IMD?
Dr. Atma Ram Jain:Muneesh, It is difficult to say
Dr. Atma Ram Jain: Hello Dr. Kar please ask question
sckar: Hello Sir
sckar:I know that you have been associated with the MST radar facility earlier. Can you tell about future programs related to that in india
Dr. Atma Ram Jain:Dr.Kar, one of the ongoing programme is MIDAS and palnning another prog. SAFE i.e. from the troposhperic and stratospheric studies. For details you can have a look at their website.
sckar: Thank you Sir, all these are observational programmes or you also have some modeling studies?
admin:Dear Firends, thank you for participating in the chat session . If you have any more quastions to ask from Dr. JAin, please send your queries to atma.jain@gmail.com
admin: We wind up the session as of now. Thanks
suresh:thanking you sir
sckar:Thank you.
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