Research Interest:  

Precipitation Variability and Extremes, Extratropical Dynamics, Indian Monsoon, Climate Modelling.

My research interests range from Indian monsoon, regional precipitation variability to large scale circulations. Currently as a postdoc, I am studying the changes in precipitation variability and extremes in response to future climate change. During my PhD, I have used both observation and modeling to analyze the climate pattern since 1901 related to the variability of Indian monsoon droughts. Our study finds that  in absence of tropical forcing, extratropical Rossby waves originating from the North Atlantic play a key role in causing severe rainfall deficit. I have carried out dynamical analysis to understand the source, propagation and influence of these synoptic wavetrain on Indian monsoon. Further simple  barotropic models and GCM framework have been used to have better insight on tropical-extratropical interaction, North Atlantic ocean-atmosphere response and the wavetrain mechanism. In continuation, I would like to expand my research horizon but not limited to, different aspects of tropical dynamics, tropical-extratropical interactions, dynamics of extreme weather events, general circulation in the warming scenario, paleoclimate etc.

Professional Positions:  

• Postdoctoral Scholar, NSF Project, P.I. Efi Foufoula-Georgiou, Department of Civil and Environmental Engineering, University of California, Irvine, USA (July'24 - Present)

• Senior Research Fellow (SRF), SERB Project, P.I. V. Venugopal, Centre for Atmospheric & Oceanic Sciences, Indian Institute of Science (November'23 - April'24)

• Senior Research Fellow (SRF), P.I. S. K. Satheesh, Divecha Centre for Climate Change, Indian Institute of Science (August'21 - April'22)

Publications 

1. P. J. Borah, V. Venugopal, J. Sukhatme, P. Muddebihal, B.N. Goswami,  Indian monsoon derailed by a North Atlantic wavetrain. Science, 2020, doi: 10.1126/science.aay6043.

2. P. J. Borah, V. Venugopal, J. Sukhatme, Extra Tropical Influence on Early Season Deficit of Indian Monsoon Rainfall. (in prep)

3. R. Joshi, P. J. Borah, V. Venugopal, Sub Seasonal Characteristics of Rainfall during Indian Monsoon Flood Years. (in prep)

Conferences/Meetings 

1. P. J. Borah, V. Venugopal, J. Sukhatme, Extra Tropical Influence on Early Season Deficit of Indian Summer Monsoon Rainfall, American Meteorological Society 102nd Annual Meeting, January 2022, Houston, USA. Link 

2. P. J. Borah, V. Venugopal, J. Sukhatme, Influence of North Atlantic on the Early Season deficit of Indian monsoon, American Geophysical Union Fall Meeting, December 2021, New Orleans, USA. Link 

3. R. Joshi, P. J. Borah, V. Venugopal, Sub seasonal characteristics of rainfall during Indian monsoon in flood years, American Geophysical Union Fall Meeting, December 2021, New Orleans, USA. Link 

4. P. J. Borah, V. Venugopal, J. Sukhatme, P. Muddebihal and B. N. Goswami, Two distinct types of Indian monsoon droughts, American Geophysical Union Fall Meeting, December 2019, San Francisco, USA. Link 

5. V. Venugopal, P. J. Borah, J. Sukhatme, B. N. Goswami, Space-time structure of sub seasonal Indian Monsoon droughts, International Conference on Precipitation IPC-12, June 2019, Irvine, USA. Link 

6. P. J. Borah, V. Venugopal, Influence of Internal Variability and External Forcing on Indian Monsoon Droughts, WCRP Meeting Monsoon & Tropical Rainbelts , July 2018, ICTP, Italy. Link 

Master Dissertation

‘HST/COS Detection and Modelling of Intervening Absorbing Systems Towards QSO PG1148+549.’ 

We have identified and studied the physical and atomic properties of the intergalactic gaseous medium present along the line of sight towards a Quasar, a  distant luminous active galaxy. Further we did blackbody spectrum modeling to understand the environment (radiation, temperature, gas density etc) of the Quasar along with these intervening systems. (Project Supervisor: Prof Amit Pathak, Tezpur University, India, August’15 -May'16) Report.pdf 

Project Experience

1. Probing the Environment of Peculiar Broad and Narrow absorption line Quasar Q0059-2735 (UVES/VLT Observation). (Summer Research Fellowship Programme), ARIES Nainital, India. (Supervisor: Dr. Hum Chand, Scientist D , May’14-July’14).  Report.pdf 

2. FUSE Detection of NeVIII Absorbers Towards Quasar HE 0226-4110. (Undergraduate Project), Tezpur University, India. (Supervisor: Dr. Amit Pathak, January’14-May’14) Report.pdf 

3. Studying the high velocity outflow of the photoionized cloud of  Quasar J0318-0600 (UVES/VLT Observation). (Summer Research Fellowship Programme). ARIES Nainital, India. (Supervisor: Dr. Hum Chand, Scientist D , May’13-July’13) Report.pdf