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 their significance on global ocean atmosphere processes using natural archives.
RESEARCH, TEACHING, or OTHER INTERESTS
Geology, Earth-Surface Processes, Oceanography, Earth and Planetary Sciences
33
Scopus Publications
908
Scholar Citations
18
Scholar h-index
26
Scholar i10-index
Scopus Publications
Pre-bomb marine reservoir corrections for the southeastern Arabian Sea Harsh Raj, Ankur J Dabhi, Upasana S Banerji, Ravi Bhushan Radiocarbon, 2026 Estimates of marine reservoir corrections (ΔR) in the southeastern Arabian Sea region are limited. To better constrain the region’s marine reservoir corrections, additional pre-bomb radiocarbon records are needed. In this context, a coral core from the Lakshadweep archipelago in the southeastern Arabian Sea has been analyzed to measure its radiocarbon content. Pre-bomb radiocarbon values from the coral record are used to estimate the marine reservoir correction value of the region. The mean ΔR value of the Lakshadweep region is calculated to be –128 ± 130 yr. The comparison of available ΔR values from the Arabian Sea region shows that the mean ΔR value of the eastern Arabian Sea is significantly lower than that of the northern and western Arabian Sea. The low ΔR values from the eastern Arabian Sea likely indicate the influence of relatively 14 C-enriched Bay of Bengal water in the region.
Vegetation Response to the Hydro-Climatic Changes During the Late Quaternary Mohammad Firoze Quamar, Upasana Swaroop Banerji Quaternary, 2025 Climate change is most clearly reflected in vegetation, as it forms an integral and fundamental component of ecosystems that is sensitive to and governed by climatic changes [...]
Geochemical records of mudflat sediments from southern Saurashtra, Western India: Implications for Holocene climate and global teleconnection Upasana S Banerji, Ravi Bhushan, Kumar Batuk Joshi, Ankur Dabhi, AK Sudheer, Chandra Prakash Dubey, Rakesh Kumar Panda, Nayana V Haridas, Mahesh Gaddam Holocene, 2024 The heat transfer from the low latitudes to high latitudes is responsible for maintaining the earth’s climate dynamics. Thus, deciphering the possible mechanism driving the variability of the Indian summer monsoon (ISM) during the Holocene Epoch has been critical to understand the hydroclimatic changes of the low latitudes. Despite several efforts, the teleconnection of ISM with the global climate dynamics remains under-represented and poorly understood. The present study aims to delineate the ISM variability and its possible forcing mechanism from western India (Gujarat). In this study, a sediment core (~65 cm long) was raised from the Jaffrabad mudflat (MIT) in western Gujarat. The sediment samples were subjected to geochemical analysis to investigate paleomonsoon, paleo-sediment source and paleoweathering changes. The results show that, with the addition of intermediate sources, the sediments were principally derived from the hinterland’s Deccan basalts. Further, the study suggested a warm and wet climate due to strong ISM during 10,650−5500 cal yr BP associated with the solar as well as orbital forcings. The weak monsoon during 5500−2700 cal yr BP has been linked with southward migration of the Intertropical Convergence Zone (ITCZ) along with the increased El Niño-like conditions. Further, the wavelet analysis revealed that a combined influence of solar, orbital and North Atlantic forcings led to monsoon variability along western India, during the Holocene Epoch. By reconciling the geochemical proxies, the present study has implications in the reconstruction of paleomonsoon and establishing the possible teleconnection with the global climate system.
Tracing the Late Quaternary coastal evolution of Central Kerala, India, around the lost ancient port Muziris using multi-proxy study of the sedimentary archives Prasenjit Das, D. Padmalal, K.P.N. Kumaran, Ruta B. Limaye, S. Vishnu Mohan, Upasana S. Banerji, Ravi Bhushan Quaternary Science Advances, 2024 The Central Kerala coast in Southwest India serves as a valuable natural archive for studies of the Late Quaternary coastal evolution, palaeoclimate, and maritime trades. The coast is an archeologically and culturally significant region in South India, located in the mouth of the longest river in Kerala, the Periyar River. The riverbank of the Periyar at its mouth is believed to host the ancient port Muziris, whose remnants are found in the areas around where the Periyar River joins the Arabian Sea. Sea level oscillations and climate variabilities in the past have played a pivotal role in the destruction of the Muziris port. Recent excavations unearthed many artifacts from nearby areas of the river confluence; however, the exact location of the port remains unresolved. The present study is an attempt to trace out the coastal evolutionary processes and palaeoclimatic conditions that prevailed in the area during the Late Quaternary period using three drilled cores retrieved from this stretch of the coastal lands. A multi-proxy approach, combining geochemical, mineralogical, palynological, and geochronological tools was used in the study. The Holocene deposit in the study area is composed mainly of sand and clay-dominant sediments that fall within an age range of 1.1 – 8.1 cal kyr BP, whereas the underlying sedimentary sequence dates to a maximum of 31.5 – 37.9 cal kyr BP. The inorganic and organic elemental compositions, together with the textural and palynological attributes, indicate that Holocene sedimentation occurred here under fluctuating environmental conditions with significant changes in climate and sea level positions. The upper part of this section bears the signature of the humid depositional environment that prevailed during the Late Holocene when sand-dominated sediments were deposited and brought in under the influence of longshore drift. The sediments from the lower part of the section carry the signature of the Holocene transgression when deposition took place under submerged conditions with considerable marine influence but receiving significant terrestrial inputs. The study highlights the location of the historically significant lost ancient port of Muziris at Kodungallur near the mouth of the Periyar River. A three-fold evolutionary model proposed for the coastal segment revealed that the location of the Muziris port was part of the Periyar River near Kodungallur, as mentioned by the historians, and the settlement near Pattanam may be considered a satellite township of the ancient Muziris port.
Rapid sedimentation history of Rewalsar Lake, Lesser Himalaya, India during the last fifty years - Estimated using 137Cs and 210Pb dating techniques: A comparative study with other North-Western Himalayan Lakes Himalayan Geology, 2016
Late Quaternary climate reconstruction using multiproxy approach and mathematical techniques US Banerji, CP Dubey, L Pandey, MF Quamar, KB Joshi Quaternary International 757, 110097 , 2026 2026
Pre-bomb marine reservoir corrections for the southeastern Arabian Sea AJ Dabhi, US Banerji, R Bhushan Cambridge University Press , 2026 2026
Pre-bomb marine reservoir corrections for the southeastern Arabian Sea H Raj, AJ Dabhi, US Banerji, R Bhushan Radiocarbon, 1-14 , 2026 2026
DECODING THE CONUNDRUM OF INDIAN MONSOON VARIABILITY AND ITS GLOBAL LINKAGE DURING THE MEGHALAYAN STAGE (4.2 KA TO PRESENT) US Banerji Climate Dynamics over the Indian Subcontinent: Geological Perspectives, 308 , 2025 2025
Decoding late Quaternary paleoclimatic signatures from the western Bay of Bengal: A multiproxy approach NV Haridas, US Banerji, D Padmalal, K Maya, PJ Kurian, R Bhushan, ... Quaternary International 740, 109887 , 2025 2025 Citations: 1
Vegetation Response to the Hydro-Climatic Changes During the Late Quaternary MF Quamar, US Banerji Quaternary 8 (2), 23 , 2025 2025 Citations: 1
Geochemical records of mudflat sediments from southern Saurashtra, Western India: Implications for Holocene climate and global teleconnection US Banerji, R Bhushan, KB Joshi, A Dabhi, AK Sudheer, CP Dubey, ... The Holocene 34 (11), 1700-1720 , 2024 2024 Citations: 3
Geochemical trends in sedimentary environments using PCA approach. D Srivastava, CP Dubey, US Banerji, KB Joshi Journal of Earth System Science 133 (3), 1 , 2024 2024 Citations: 5
Tracing the Late Quaternary coastal evolution of Central Kerala, India, around the lost ancient port Muziris using multi-proxy study of the sedimentary archives P Das, D Padmalal, KPN Kumaran, RB Limaye, SV Mohan, US Banerji, ... Quaternary Science Advances 14, 100197 , 2024 2024 Citations: 5
Hydroclimatic changes in the Core Monsoon Zone of India since the Last Glacial Maximum: An overview of the palynological data and correlation with the marine and continental … MF Quamar, US Banerji, B Thakur, R Kar Palaeogeography, Palaeoclimatology, Palaeoecology 633, 111844 , 2024 2024 Citations: 32
Seasonal variation of surface seawater radiocarbon in the Andaman Sea as recorded in coral H Raj, R Bhushan, US Banerji, PS Jena, AJ Dabhi Journal of environmental radioactivity 255, 107021 , 2022 2022 Citations: 1
Quaternary dating and instrumental development: An overview US Banerji, V Goswami, KB Joshi Journal of Asian Earth Sciences-X , 2022 2022 Citations: 17
Paleoclimatic and paleoceanographic records from the Bay of Bengal sediments during the last 30 ka NV Haridas, US Banerji, K Maya, D Padmalal Journal of Asian Earth Sciences, 105169 , 2022 2022 Citations: 26
An outline of geochemical proxies used on marine sediments deposited during Quaternary Period US Banerji, KB Joshi, L Pandey, CP Dubey Stratigraphy & Timescales 7 , 2022 2022 Citations: 9
Geochemical indicators in provenance estimation US Banerji, CP Dubey, V Goswami, KB Joshi Geochemical Treasures and Petrogenetic Processes , 2022 2022 Citations: 31
Detrital Zircons in Crustal Evolution: A Perspective from the Indian Subcontinent KB Joshi, US Banerji, CP Dubey, EP Oliveira Lithosphere 2022, 3099822 , 2022 2022 Citations: 16
Holocene monsoon and sea-level variability from coastal lowlands of Kerala, SW India J Shaji, US Banerji, K Maya, KB Joshi, AJ Dabhi, N Bharti, R Bhushan, ... Quaternary International , 2022 2022 Citations: 21
Air-sea CO2 exchange rate in the northern Indian Ocean based on coral radiocarbon records R Raj, Harsh Bhushan, US Banerji, M Muruganantham, C Shah, ... Applied Geochemistry 137, 105208 , 2022 2022 Citations: 6
Bond Events and Monsoon Variability during Holocene - Evidence from Marine and Continental Archives US Banerji, D Padmalal Holocene Climate Change and Environment, 293-338 , 2022 2022 Citations: 20
Mid-late Holocene evolutionary history and climate reconstruction of Vellayani lake, south India US Banerji, J Shaji, P Arulbalaji, K Maya, SV Mohan, AJ Dabhi, A Shivam, ... Quaternary International 599, 72-94 , 2021 2021 Citations: 35
MOST CITED SCHOLAR PUBLICATIONS
8000-year monsoonal record from Himalaya revealing reinforcement of tropical and global climate systems since mid-Holocene P Srivastava, R Agnihotri, D Sharma, N Meena, YP Sundriyal, A Saxena, ... Scientific Reports 7 (1), 1-10 , 2017 2017 Citations: 126
Holocene climate variability and Indian Summer Monsoon: an overview US Banerji, P Arulbalaji, D Padmalal The Holocene 30 (5), 744-773 , 2020 2020 Citations: 89
Mid-Holocene climate and land–sea interaction along the southern coast of Saurashtra, western India US Banerji, S Pandey, R Bhushan, N Juyal Journal of Asian Earth Sciences 111, 428-439 , 2015 2015 Citations: 55
Mid− late Holocene monsoonal records from the partially active mudflat of Diu Island, southern Saurashtra, Gujarat, western India US Banerji, R Bhushan, AJT Jull Quaternary International 443, 200-210 , 2017 2017 Citations: 49
Signatures of global climatic events and forcing factors for the last two millennia from the active mudflats of Rohisa, southern Saurashtra, Gujarat, western India US Banerji, R Bhushan, AJT Jull Quaternary International 507, 172-187 , 2019 2019 Citations: 43
Last-five-decade heavy metal pollution records from the Rewalsar Lake, Himachal Pradesh, India NK Meena, M Prakasam, R Bhushan, S Sarkar, P Diwate, U Banerji Environmental Earth Sciences 76 (1), 39 , 2017 2017 Citations: 40
First results from the PRL accelerator mass spectrometer R Bhushan, MG Yadava, MS Shah, US Banerji, H Raj, C Shah, AJ Dabhi Current Science 116 (3), 361-363 , 2019 2019 Citations: 37
Heavy Minerals in Provenance Studies: An Overview KB Joshi, US Banerji, CP Dubey, EP Oliveira Arabian Journal of Geosciences 14, 1330 , 2021 2021 Citations: 36
Hydroclimate variability during the last two millennia from the mudflats of Diu Island, Western India US Banerji, R Bhushan, KB Joshi, J Shaji, AJT Jull Geological Journal , 2021 2021 Citations: 36
Rapid sedimentation history of Rewalsar Lake, Lesser Himalaya, India during the last fifty years-estimated using Cs and Pb dating techniques: a comparative study with other … S Sarkar, M Prakasam, S Upasana, R Bhushan, PK Gaury, NK Meena Himal Geol 37 (1), 1-7 , 2016 2016 Citations: 36
Mid-late Holocene evolutionary history and climate reconstruction of Vellayani lake, south India US Banerji, J Shaji, P Arulbalaji, K Maya, SV Mohan, AJ Dabhi, A Shivam, ... Quaternary International 599, 72-94 , 2021 2021 Citations: 35
Hydroclimatic changes in the Core Monsoon Zone of India since the Last Glacial Maximum: An overview of the palynological data and correlation with the marine and continental … MF Quamar, US Banerji, B Thakur, R Kar Palaeogeography, Palaeoclimatology, Palaeoecology 633, 111844 , 2024 2024 Citations: 32
Geochemical indicators in provenance estimation US Banerji, CP Dubey, V Goswami, KB Joshi Geochemical Treasures and Petrogenetic Processes , 2022 2022 Citations: 31
Paleoclimatic and paleoceanographic records from the Bay of Bengal sediments during the last 30 ka NV Haridas, US Banerji, K Maya, D Padmalal Journal of Asian Earth Sciences, 105169 , 2022 2022 Citations: 26
Holocene monsoon and sea-level variability from coastal lowlands of Kerala, SW India J Shaji, US Banerji, K Maya, KB Joshi, AJ Dabhi, N Bharti, R Bhushan, ... Quaternary International , 2022 2022 Citations: 21
Bond Events and Monsoon Variability during Holocene - Evidence from Marine and Continental Archives US Banerji, D Padmalal Holocene Climate Change and Environment, 293-338 , 2022 2022 Citations: 20
210 Pb dating of recent sediments from the continental shelf of western India: factors influencing sedimentation rates C Shah, US Banerji, KR Chandana, R Bhushan Environmental monitoring and assessment 192 (7), 468 , 2020 2020 Citations: 20
Heavy Metals in Soils and Vegetation from Wastewater Irrigated Croplands Near Ahmedabad, Gujarat: Risk to Human Health. B Mohanty, A Das, R Mandal, U Banerji, S Acharyya Nature Environment & Pollution Technology 20 (1) , 2021 2021 Citations: 19
Recent developments in instrumentation and its application in absolute Dating: historical perspective and overview KB Joshi, V Goswami, US Banerji, R Shankar Journal of Asian Earth Sciences 211, 104690 , 2021 2021 Citations: 18
Quaternary dating and instrumental development: An overview US Banerji, V Goswami, KB Joshi Journal of Asian Earth Sciences-X , 2022 2022 Citations: 17