Upasana Swaroop Banerji
@ncess.gov.in
Project Scientist-II
Hydrology Group, National Centre for Earth Science Studies (NCESS), Ministry of Earth Sciences (MoES)
The unprecedented need to study climate processes reinvigorated my interest in hitherto climate and related processes over past millennial to centennial time scales. The prime focus of my research is to understand the major forcing factors acting on climate perturbations during the last few millennia and its significance on global ocean atmosphere processes using natural archives.
EDUCATION
2017, Geology; Department of Geology, Maharaja Sayajirao University of Baroda, Vadodara, Gujarat.
Thesis: Holocene Climatic Variability using Mudflats from Saurashtra, Western India. [Supervised by Prof. D.M. Maurya]
M.Sc.: 2009, Geology; Geology Department, M.G. Science Institute, Gujarat University, Ahmedabad, Gujarat. [First Division; Gold Medal]
B.Sc.: 2007, Geology; Geology Department, M.G. Science Institute, Gujarat University, Ahmedabad, Gujarat. [First Division]
RESEARCH INTERESTS
Paleoclimate and Paleoceanography
Indian monsoon and its teleconnection with the global climate system
Role of natural climate forcing and climate variables during Holocene Epoch
Geochemical and isotopic proxies in sediments
Sediment Geochronology
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mohammad Firoze Quamar, Upasana Swaroop Banerji, Biswajeet Thakur, and Ratan Kar
Elsevier BV
Jithu Shaji, Upasana S. Banerji, K. Maya, Kumar Batuk Joshi, Ankur J. Dabhi, Nisha Bharti, Ravi Bhushan, and D. Padmalal
Elsevier BV
Harsh Raj, Ravi Bhushan, Upasana S. Banerji, Partha Sarathi Jena, and Ankur J. Dabhi
Elsevier BV
Upasana S. Banerji, Vineet Goswami, and Kumar Batuk Joshi
Elsevier BV
Nayana V Haridas, Upasana S. Banerji, K. Maya, and D. Padmalal
Elsevier BV
Harsh Raj, Ravi Bhushan, Upasana S. Banerji, M. Muruganantham, Chinmay Shah, Romi Nambiar, and Ankur J. Dabhi
Elsevier BV
Harsh Raj, Ravi Bhushan, Sanjeev Kumar, Upasana S. Banerji, Chinmay Shah, and Sangeeta Verma
Elsevier BV
Upasana S. Banerji, Chandra Prakash Dubey, Vineet Goswami, and Kumar Batuk Joshi
Springer Nature Singapore
Kumar Batuk Joshi, Upasana S. Banerji, Chandra Prakash Dubey, and Elson P. Oliveira
GeoScienceWorld
Abstract Detrital zircons are frequently used for crustal evolutionary studies as they sample vast regions of the continental crust. In the present study, we utilise newly compiled U-Pb detrital zircon data from the Indian subcontinent as well as a compilation of previously reported global data along with Hf isotopes of modern and ancient sediments in order to understand crustal evolution in the Indian subcontinent. The detrital zircon U-Pb age data from the Indian subcontinent show peaks (at 2400–2700, 1600–1900, 850–1200, and 450–550 Ma) that correlate with the formation of major known supercontinents. In addition, two other peaks at 3200–3400 Ma and <100 Ma do not correspond to periods of supercontinent formation. The former peak may represent uneven geographic sample density due to enhanced erosion and exhumation of Archean sources. The distinctly younger (<100 Ma) detrital zircon age peak may represent zircon preservation due to the Himalayan orogeny. The zircon Hf model ages from the Indian subcontinent suggest that the Precambrian crust was the major source of continental crust with younger ages. The conspicuous shift to positive εHf (t) at ca. 3600 Ma from detrital zircons of the Indian subcontinent may underscore a change in geodynamic processes, while the highly negative values post ~3200 Ma may be associated with the crustal reworking. A wavelet analysis of detrital zircons from the Indian and global databases reveals a prominent cyclicity of ~800 Myr and ∼350 Myr plausibly representing the supercontinent cycle and its half cycle. An incongruence in power between global and Indian εHf (t) could be due to the local subcontinental geologic processes during the Paleo- to Mesoarchean.
Upasana S. Banerji, Jithu Shaji, P. Arulbalaji, K. Maya, S. Vishnu Mohan, Ankur J. Dabhi, A. Shivam, Ravi Bhushan, and D. Padmalal
Elsevier BV
Kumar Batuk Joshi, Upasana S. Banerji, Chandra Prakash Dubey, and Elson P. Oliveira
Springer Science and Business Media LLC
Upasana S. Banerji, Ravi Bhushan, Kumar Batuk Joshi, Jithu Shaji, and A. J. Timothy Jull
Wiley
The climate variability over western India has been significantly influenced by the perturbations in the Indian summer monsoon (ISM) and thus, provides a crucial platform to investigate the paleomonsoon variations, weathering intensity, and sediment source. The mudflats of southern Saurashtra, western India are deprived of perennial rivers, but the region receives terrestrial contribution exclusively due to activation of seasonal rivers during the monsoon. In the present study, an attempt has been made to investigate the paleomonsoon and palaeoweathering using various geochemical proxies (detrital, productivity, redox, and weathering) on the mudflat sediment core of southern Saurashtra, western Gujarat. The core is chronologically constrained by 14C, 210Pb, and 137Cs dating techniques. The study suggests ISM strengthening during 2000–1800 cal yr BP with intermittent marginal ISM weakening during 1950–1970 cal yr BP and 1930–1890 cal yr BP associated with the reduced solar irradiance. Further, ISM weakening has been invoked during Dark Age Cold period (1800–1300 cal yr BP) and Little Ice Age (800–200 cal yr BP) interrupted by a marginal ISM strengthening during Medieval Warm period and the last two centuries witness climate warming. Based on historical rainfall data and Al2O3, an intermittent strengthening of ISM during 90–30 cal yr BP has been suggested while a gradual increase in the weathering intensity synchronous to the rise in sea surface temperature (SST) during the last 200 cal yr BP revealed the role of temperature on the intensity of chemical weathering in the study area. In spite of changes in the geochemical proxies as a function of ISM fluctuations, the palaeoweathering intensities has remained nearly consistent wherein the chemical weathering was less operative and accompanied by the deposition of texturally immature sediments. The sediments of Diu mudflat indicate mafic signatures thereby underscoring a major contribution of the Deccan basalts along with other variable sources.
Kumar Batuk Joshi, Vineet Goswami, Upasana S. Banerji, and Ravi Shankar
Elsevier BV
Bibhabasu Mohanty, Anirban Das, Reema Mandal, Upasana Banerji, and Sukanya Acharyya
Technoscience Publications
Heavy metal accumulation in soils, and subsequently, in vegetation by long-term wastewater irrigation has a potentially detrimental effect on humans via their transfer along the food chain. In this reconnaissance study the effects of wastewater irrigation on the accumulation of heavy metals (Co, Cr, Cu, Mn, Ni, Pb and Zn) in soils and vegetables from croplands along some ~60 km stretches of Sabarmati River, near Ahmedabad city were assessed. Geochemical factors associated with metals in the soil-water environment seem to regulate more the metal transfer (soil-to-vegetable) than the physiological factors associated with the vegetable’s types. The risk associated with the dietary intake of metal contaminated vegetables was quantified by Hazard Quotient (HQ). HQ was found to be very less sensitive on to the dietary intake pattern (e.g., leafy versus non-leafy vegetables) of the consumers. In contrast to low risk associated with Co, Cu, Ni and Zn with very low HQ values, high risk was found for Pb (HQ of ~6.1±0.6) followed by both Mn and Cr (HQ of ~1.0 ± 0.1). Based on the results on wastewater irrigation in the studied region, we suggest more efficient treatment of wastewater facilities and semi-decadal monitoring of heavy metal in vegetables grown under wastewater irrigated soils.
P. Arulbalaji, Upasana S. Banerji, K. Maya, and D. Padmalal
Elsevier BV
Upasana S. Banerji and D. Padmalal
Elsevier
Chinmay Shah, Upasana S. Banerji, K. R. Chandana, and Ravi Bhushan
Springer Science and Business Media LLC
Upasana S Banerji, P Arulbalaji, and D Padmalal
SAGE Publications
The response of the Indian Summer Monsoon (ISM) to forcing factors and climate variables has not yet fully explored, even though the ISM plays a pivotal role in the socio-economics of the Indian subcontinent and nearby areas. The ISM progression over Indian landmass is a manifestation of the Intertropical Convergence Zone (ITCZ) migration over the northern Indian Ocean and the Indian subcontinent. The recent anomalous behaviour of ISM raises the need for a better understanding of its spatio-temporal changes during the ongoing interglacial period termed as the Holocene period. The Holocene period has been classified further based on the globally observed abrupt climatic events at 8.2 and 4.2 ka. The 8.2 ka global cooling events have been recorded from northern Indian Ocean marine archives but limited records from the continental archives of the Indian landmass has demonstrated the 8.2 ka event. At the same time, the 4.2 ka dry climate has been endorsed by both marine as well as continental records and agrees with the global studies. During the ‘Little Ice Age’ (LIA), in the India subcontinent, wet conditions prevailed in the northern, central and western regions while a dry climate existed over the greater part of peninsular India. The present review offers an account of ISM signatures and possible mechanisms associated with the monsoon variability in the Indian subcontinent and the northern Indian Ocean during the Holocene period.
Upasana S. Banerji
Springer Science and Business Media LLC
Upasana S. Banerji, Ravi Bhushan, and A.J.T. Jull
Elsevier BV
Pradeep Srivastava, Rajesh Agnihotri, Deepti Sharma, Narendra Meena, Y. P. Sundriyal, Anju Saxena, Ravi Bhushan, R. Sawlani, Upasana S. Banerji, C. Sharma,et al.
Springer Science and Business Media LLC
Upasana S. Banerji, Ravi Bhushan, and A.J.T. Jull
Elsevier BV
Narendra Kumar Meena, M. Prakasam, Ravi Bhushan, Sudipta Sarkar, Pranaya Diwate, and Upasana Banerji
Springer Science and Business Media LLC