Abstract Title: Lithospheric Anomaly Map of Indian Region Derived from Swarm and Champ Satellite Data
Abstract Submitted to: GEOMAGNETISM, PALEOMAGNETISM AND ELECTROMAGNETISM
Abstract Text:
The data of vector magnetic measurements from Swarm satellite constellation (2014 to 2020) and CHAMP satellite (2006 to 2010) has been utilised to model the lithospheric magnetic anomaly over the Indian sub-continent. Combination of swarm and champ is selected so as to cover more number of passes over Indian region. Magnetic field measurements made by satellites contain contribution form the core, the lithospheric and the external field. As our target is to isolate lithospheric field, the field arising from other sources need to be eliminated. External effects from magnetosphere and ionosphere has been removed by taking the low geomagnetic activity days into consideration. The Chaos-7 Geomagnetic model has been utilised to amputate the main field and the remaining external field if any in the data to obtain the residual data. To generate the lithospheric anomaly map, the residual data has been expanded using Legendre polynomial and using damped least square method the model coefficients were estimated based on input data. The Satellite derived crustal anomalies thus generated mainly reflects the long wavelength features over the Indian sub-continent with the various tectonic provinces showing distinct magnetic signatures. These include distinct low over the Deccan Volcanic Province (Large Igneous Province), the Himalayan Belt etc and highs over the Saurashtra-Marwar block, Shillong Massif and over Archean cratonic areas like Eastern Dharwar, Bastar etc.We have also made a comparative study of the lithospheric magnetic anomalies generated using Magsat, MF7 model from Champ and from the present study. The results of these will be presented.
What Winning This Award Means to Me:
I am Monica Rawat, pursuing a Ph.D. in geophysics at the Indian Institute of Geomagnetism, Navi Mumbai. Currently, I am in the last year of my Ph.D. I have Submitted one abstract entitled” Lithospheric Anomaly Map of India Region Derived from Swarm and Champ Satellite Data” to the AGU fall meeting 2022 which is going to be held in Chicago Illinois from 12 December to 16 December. Based on my current research work a well-detailed proposal has been sent and my work has been recognized on a global basis due to which I received a student travel grant award of $1000 which can cover local expenses during the fall meeting of 2022. AGU Fall Meeting is one of the well-known conferences in the field of multidisciplinary subjects of Geophysics. This conference will be very beneficial and enlightening for me. I will get a unique opportunity to interact and exchange ideas with young researchers, field experts, and eminent scientists from all over the world. I will get to know about the post-doctoral position available in various institutes globally. I will get a chance to interact with people working in a similar field to mine. With the interaction, I can improve my knowledge and will get to know which skills I need to develop and focus on. It will also help me in achieving my academic and career goals. AGU is the platform where ideas can be discussed and exchanged through which I can get a broader picture of my work. I can get a chance to learn new techniques and methods to implement in my work. As my work includes surface and interior modelling I can get some suggestions and feedback which will help in improving my work. Through this meeting, I will get to know about the instrument and software being developed globally. This meeting will give me insight into different modeling techniques developed globally and also provide the platform to get collaborators for my future research work. I am expecting the right direction for my work through this meeting where I can discuss my ideas and work. At present, I am working and testing my work on a local scale which includes societal benefits such as geo resources and natural geo-hazards, and later it can be done the same on a global scale. The AGU community has various earth science themes, and through the meeting, I will get to know the current trend going on in the research community. I am also interested in the multidisciplinary field of geophysics. Indian country has very diverse geology covering the time scale from Archean to quaternary. Through modelling of crust and core involving geological perspective provides the ideal opportunity to investigate proxy heat flow map, tectonics movement, geo-hazards control, and geothermal resources, etc. Geoscientific research discussions with young minds and experienced scientists will help in growing my career so that I can contribute my development to the scientific field.
My research work has many scientific merits as my work theme is to obtain a high-resolution lithospheric anomaly model over the Indian sub-continent and its adjoining oceans. With this theme, I can work on various geophysical applications, and as well idea is to use this model for societal benefits too. A better lithospheric model can bring awareness to the scientific field. Feedback from the scientific community will help in refining the work. The spectrum of numerous geophysical and geological fields can be used to study natural hazards and mitigation, identification and evaluation of geothermal resources, exploration, deep interior study, and finding of suture zones and earthquakes, etc. Other than these merits, my current theme in correlation with other Geophysical methods proves to be beneficial in Geoscience applications.
As my work includes societal benefits which I wanted to test it on a local scale which can be further tested on a global scale by discussing and collaborating with experienced scientists who can give direction to my work and can give some feedback and suggestions to my work.
Monica Rawat
Description
Funded by:
Current Institute of Study/Organization: Indian Institute of Geomagnetism
Currently Pursuing: Master's
Country: IN