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Dr. Uma Das
Ph.D. [Physical Research Laboratory, Ahmedabad]
Subject : Physics
Email : uma AT iiitkalyani.ac.in


Research Interests:

Space and Atmospheric Sciences, Satellite Data Mining, Atmospheric Dynamics, Ionosphere, Tides and Planetary Waves, Artificial Intelligence and Machine Learning in Space and Atmospheric Sciences

SPONSORED PROJECTS


Ongoing Projects:
1. Long Short Term Memory based Neural Network Approach for Prediction of Wintertime Fog over Northern India, Sponsoring Agency: Ministry of Earth Sciences (MoES), PI: Dr. Uma Das, Co-PI: Dr. Oishila Bandyopadhyay and Dr. Dalia Nandi, Total Cost: 24.37 Lakhs, Duration: October 2022 – October 2023.

2. Cyclone Intensity and Track Prediction using Deep Learning, Sponsoring Agency: Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Govt. of India, Grant Type: SERB Power Grant (SPG), PI: Dr. Uma Das, Co-PI: Dr. Oishila Bandyopadhyay, Total Cost: 26.44 Lakhs, Duration: September 2023 - September 2026.



Completed:
1. Science and Engineering Research Board (SERB), Department of Science and Technology (DST), Govt. of India sponsored project ECR/2017/002258:Title: ‘Short-term Variability in Sun-Synchronous and Non-Sun Synchronous Tides in the Middle Atmosphere from Investigations of Contemporaneous Satellite, Model and Reanalysis Data’, Domain: Atmospheric Physics and Data Analytics, PI: Dr. Uma Das, Grant Type: Early Career Research Award (ECRA), Project Value: 20.3064 Lakhs, Duration: May 2018 – May 2021.

Man Power: 1 Junior Research Fellow


PUBLICATIONS IN PEER REVIEWED JOURNALS

*Papers that received Recognition (3); Corresponding Author (Underlined) No. of Citations: According to Research Gate Statistics.


2021 and After
1. Chia-Hung Chen, Koichiro Oyama, Hau-Kun Jhuang and Uma Das, “Driving Source of Change for Ionosphere before Large Earthquake -Vertical Ground Motion”, Remote Sens., 15(18), 4556; DOI: 10.3390/rs15184556, 2023 (Impact Factor 5.,SCIE)
2. Subhajit Debnath and Uma Das, “Short-Term Variability of Non-Migrating Diurnal Tides in the Stratosphere from CMAM30, ERA-Interim, and FORMOSAT-3/COSMIC”, Atmosphere, 14(2), 265; https://doi.org/10.3390/atmos14020265, 2023 (Impact Factor 3.11, SCIE)
3. Uma Das, “Short- and long-term stationary planetary wave variability in the middle atmosphere in contemporaneous satellite and reanalysis data”, Journal of Atmospheric and Solar- Terrestrial Physics, 231, 105864, https://doi.org/10.1016/j.jastp.2022.105864, 2022 (Impact Factor: 1.735, SCI)
4. Uma Das, Chen-Jeih Pan and Shih-Sian Yang , “Evolution of individual equatorial atmospheric Kelvin waves in the stratosphere from FORMOSAT‑7/COSMIC‑2 temperatures”, Terrestrial, Atmospheric and Oceanic Sciences, 33:4, https://doi.org/10.1007/s44195-022-00006-2, 2022 (Impact Factor: 1.009, SCI)
5. Uma Das, “Spatial variability in long-term temperature trends in the middle atmosphere from SABER/TIMED observations”, Advances in Space Research, 68, 2890-2903, https://di.org/10.1016/j.asr.2021.05.014, 2021 (Impact Factor: 2.512, SCI).
6. Shih-Sian Yang, Chen-Jeih Pan, Uma Das, “Investigation on the Spatio-Temporal Distributions of Gravity Wave Potential Energy over the Equatorial Region using the ERA5 Reanalysis Data”, 12, 311. https://doi.org/10.3390/atmos12030311, Atmosphere, 2021. (Impact Factor: 2.397; Citation:1, Indexed in Scopus & SCIE)


2011-2020
1. Uma Das, Ward, W. E., Pan, C. J., and Das, S. K., “Migrating and Non Migrating Tides Observed in the Stratosphere from FORMOSAT-3/COSMIC Temperature Retrievals”, Annales Geophysicae, 38, 421–435, https://doi.org/10.5194/angeo-38-421-2020, 2020. (Impact Factor: 1.49, Citations: 8, SCI)
2. Chen-Jeih Pan, Shih-Sian Yang, Uma Das, Wei-Sheng Chen, “Morphology of the wavenumber 1 and wavenumber 2 stratospheric Kelvin waves using the long-term ERA- Interim reanalysis dataset”, Atmosphere, 11,421; doi:10.3390/atmos11040421, 2020. (Impact Factor: 2.397; Citations: 1, Indexed in Scopus & SCIE)
3. Wei-Sheng Chen, C.J. Pan, Uma Das, “The mean zonal wind effect on the long-term variation of ultra-fast Kelvin waves in the mesosphere and lower thermosphere and in the upper stratosphere”, J. Atmos. Sol. Terr. Phys., 179, 459–467, doi: 10.1016/j.jastp.2018.10.006, 2018. [Impact Factor: 1.503, Citation: 4]
4. Uma Das and C. J. Pan, “Equatorial atmospheric Kelvin waves during El Niño episodes and their effect on stratospheric QBO”, Science of Total Environment, 544, 908-918, doi:10.1016/j.scitotenv.2015.12.009, 2016. [Impact Factor: 4.099, Citation: 10]
5. S. S. Yang, C. J. Pan, Uma Das and H. C. Lai, “Analysis of Synoptic Scale Controlling Factors in the Distribution of Gravity Wave Potential Energy”, J. Atmos. Sol. Terr. Phys., 135, 126-135, doi:10.1016/j.jastp.2015.10.020, 2015. [Impact Factor: 1.474, Citation: 8]
6. D. Selvaraj, A. K. Patra, H. Chandra, H. S .S. Sinha, Uma Das, “Scattering cross section of mesospheric echoes and turbulence parameters from Gadanki radar observations”, J. Atmos. Sol. Terr. Phys., 119, 162–172, doi:10.1016/j.jastp.2014.08.004, 2014. [Impact Factor: 1.751, Citation: 9]
7. Uma Das and C. J. Pan, “Validation of FORMOSAT-3/COSMIC ‘atmprf’ global temperature data in the Stratosphere”, Atmospheric Measurement Techniques, 7, 731–742, doi:10.5194/amt-7-731-2014, 2014. [Impact Factor: 3.206, Citation: 24]
8. *Lim Eng Sing, Uma Das, C. J. Pan, Khiruddin Abdullah, and C. J. Wong, “Investigating Variability of Outgoing Longwave Radiation over Peninsular Malaysia using Wavelet Transform”, J. Climate, 26, 3415–3428, doi:10.1175/JCLI-D-12-00345.1, 2013. [Impact Factor: 4.362, Citation: 11]
9. Uma Das and C. J. Pan, “Strong Kelvin Wave Activity Observed during the Westerly Phase of QBO - A Case Study”, Ann. Geophys., 31, 581–590, doi:10.5194/angeo-31-581-2013, 2013. [Impact Factor: 1.518, Citation: 12]
10. H. Chandra, H. S. S. Sinha, A. K. Patra, Uma Das, D. Selvaraj, R. N. Misra, and Jayati Datta, ‘Low latitude mesospheric turbulence investigated using coordinated MST radar and rocket- borne observations from India’, J. Geophys. Res., 117, D22109, doi:10.1029/2011JD016946, 2012. [Impact Factor: 3.021, Citation: 5]
11. Uma Das and C. J. Pan, ‘The Temperature Structure of Mesosphere over Taiwan and comparison with other Latitudes’, J. Geophys. Res., 116, D00P06, doi:10.1029/2010JD015034, 2011. [Impact Factor: 3.303, Citation: 8]
12. *Uma Das, C. J. Pan, H. S. S. Sinha, “Effects of Solar Cycle Variations on Oxygen Green Line Emission Rate over Kiso”, Earth Planets Space, 63, 941–948, 2011. [Impact Factor: 1.112, Citation: 14]
13. C. J. Pan, Uma Das, S. S. Yang, C. J. Wong and H. C. Lai, “Investigation of Kelvin waves in the Stratosphere Using FORMOSAT-3/COSMIC Temperature Data”, J. Meteor. Soc. Japan., 89A, 83-86, 2011. [Impact Factor: 1.149, Citation: 9]


2010 and Before
1. *Uma Das, Duggirala Pallamraju and S. Chakrabarti, “Effect of an X‐Class solar flare on the OI 630 nm dayglow emissions”, J. Geophys. Res., 115, A08302, doi:10.1029/2010JA015370, 2010. [Impact Factor: 3.082, Citation: 8]
2. Uma Das and H. S. S. Sinha, “The Winter Equatorial Mesospheric Neutral Turbulence“, Curr. Sci., 99, 1, 80-85, 2010. [Impact Factor: 0.782, Citation: 5]
3. Duggirala Pallamraju, Uma Das and S. Chakrabarti, “Short- and long-timescale thermospheric variability as observed from OI 630.0 nm dayglow emissions from low- latitudes”, J. Geophys. Res, 115, A06312, doi:10.1029/2009JA015042, 2010. [Impact Factor: 3.082, Citation: 24]
4. Patra, A. K., N. Venkateswara Rao, D. V. Phanikumar, H. Chandra, Uma Das, H. S. S. Sinha, T. K. Pant, and S. Sripathi, “A study on the low-latitude daytime E region plasma irregularities using coordinated VHF radar, rocket-borne, and Ionosonde observations”, J. Geophys. Res., 114, A11301, doi:10.1029/2009JA014501, 2009. [Impact Factor: 3.147, Citation: 15]
5. Uma Das, H. S. S. Sinha, Som Sarma, H. Chandra and Sanat K. Das, “Fine Structure of the Low Latitude Mesospheric Turbulence”, J. Geophys. Res., 114, D10111, doi:10.1029/2008JD011307, 2009. [Impact Factor: 3.147, Citation: 20]
6. Uma Das and H. S. S. Sinha, ‘Long term variations in oxygen green line emission over Kiso, Japan from ground photometric observations using continuous wavelet transform’, J. Geophys. Res., 113, D19115, doi:10.1029/2007JD009516, 2008. [Impact Factor: 2.953, Citation: 15]
7. H. Chandra, H. S. S. Sinha, Uma Das, R. N .Misra, S. R. Das, Jayati Datta, S. C. Chakravarty, A. K. Patra, N. Venkateswara Rao and D. Narayan Rao, ‘First mesospheric turbulence study using coordinated rocket and MST radar measurements over Indian low latitude region’, Ann. Geophys, 26, 2725–2738, 2008. [Impact Factor: 1.427, Citation: 15]