I have worked on reconstruction of early life and palaeoenvironment and probing mass extinction event using organic geochemical techniques. Our work on a Gondwana Permian Triassic section showed the massive deforestation of coal-forming vegetation and a sharp decline in the vascular plant biodiversity during the transition from late Permian to Early Triassic and a forced restructuring of the wetland ecosystem at the beginning of Triassic. I am interested in a variety of topics in the Recent time scale (Holocene) and have applied organic geochemical techniques for palaeoclimatic studies such as understanding the altering dynamics of the Indian Summer Monsoon (ISM). Further, I am also using organic geochemical techniques for the study of environmental pollutants such as plastic-derived phthalates and polyaromatic hydrocarbons.

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• Srivastava, P., Sanyal, P., Bhattacharya, S., Mishra, P.K., Dutta, S., Chakravarti, R., Rai, N., Navani, N., Ambili, A., Karanth, K.P., Joshi, J., Singh, S., Kumar, S., 2023. A need to integrate metagenomics and metabolomics in geosciences and develop the deep-time digital earth-biome database of India. Current Science 124, 26–37.
• Behera, D., Mishra, P.K., Sabale, P., Bhattacharya, S., Anoop, A., 2023. Late Holocene climate variability and its impact on cultural dynamics in central India. Geological Society, London, Special Publications, 515, https://doi.org/10.1144/SP515-2020-220.
• Behera, D., Bhattacharya, S., Rahman, A., Kumar, S., Anoop, A., 2022. Molecular tracers for characterization and distribution of organic matter in a freshwater lake system from the Lesser Himalaya. Biogeochemistry 161, 315–334.
• Bulbul, M., Bhattacharya, S., Ankit, Y., Yadav, P., Anoop, A., 2022. Occurrence, distribution and sources of phthalates and petroleum hydrocarbons in tropical estuarine sediments (Mandovi and Ashtamudi) of western Peninsular India. Environmental Research 214, 113679.
• Ankit, Y., Muneer, W., Gaye, B., Lahajnar, N., Bhattacharya, S., Bulbul, M., Jehangir, A., Anoop, A., Mishra, P.K., 2022. Apportioning sedimentary organic matter sources and its degradation state: Inferences based on aliphatic hydrocarbons, amino acids and δ15N. Environmental Research 205, 112409.
• Bhattacharya, S., Kishor, H., Ankit, Y., Mishra, P.K., Srivastava, P.K., 2021. Vegetation history in a peat succession over the past 8000 years in the ISM-controlled Kedarnath region, Garhwal Himalaya: Reconstruction using molecular fossils. Frontiers in Earth Science 9, 703362.
• Ajay, K., Behera, D., Bhattacharya, S., Mishra, P.K., Ankit, Y., Anoop, A., 2021. Distribution and characteristics of microplastics and phthalate esters from a fresh water lake system in central Himalayas. Chemosphere 283, 131132.
• Bhattacharya, S., Yadav, A., Murthy, S., Kushwaha, V., 2021. Biotic response to environmental shift during the late Permian-Early Triassic transition: Assessment from organic geochemical proxies and palynomorphs in terrestrial sediments from Raniganj Sub-basin, India. Palaeogeography, Palaeoclimatology, Palaeoecology 576, 110483.
• Bhattacharya, S., Dutta, S., Kumar, S., 2021. Identification of lanostanes, A-ring methylated steranes and secosteranes in late Neoproterozoic crude oils by GC×GC-TOFMS: New insights into molecular taphonomy of steroids. Geobios 68, 47-59.
• Misra, S., Bhattacharya, S., Mishra, P.K., Misra, K.G., Agrawal, S., Anoop, A., 2020. Vegetational responses to monsoon variability during Late Holocene: Inferences based on carbon isotope and pollen record from the sedimentary sequence in Dzukou valley, NE India. Catena 194, 104697.
• Tewari, A., D’Rozario, A., Bhattacharya, S., Barua, A., Bera, M., Bera, S., Dutta, S., 2019. Biomarker signatures of the iconic Glossopteris plant. Palaeogeography, Palaeoclimatology, Palaeoecology 531, Part B, 108887.
• Bhattacharya, S., Khan, M.A., More, S., Paruya, D.K., Chakraborty, T., Bera, S., Dutta, S., 2018. Amber embalms essential oils: A rare preservation of monoterpenoids in fossil resins from eastern Himalaya. Palaios 33, 218–227.
• Dutta, S., Mehrotra, R.C., Paul, S., Tiwari, R.P., Bhattacharya, S., Srivastava, G., Ralte, V.Z., Zoramthara, C., 2017. Remarkable preservation of terpenoids and record of volatile signalling in plant-animal interactions from Miocene amber. Scientific Reports 7, 1–6.
• Bhattacharya, S., Dutta, S., Summons, R.E., 2017. A distinctive biomarker assemblage in an Infracambrian oil and source rock from western India: Molecular signatures of eukaryotic sterols and prokaryotic carotenoids. Precambrian Research 290, 101–112.
• Bhattacharya, S., Dutta, S., 2015. Neoproterozoic-Early Cambrian biota and ancient niche: A synthesis from molecular markers and palynomorphs from Bikaner-Nagaur Basin, western India. Precambrian Research 266, 361–374.
• Bhattacharya, S., Dutta, S., Dutta, R., 2014. Molecular fossils in Cretaceous condensate from western India. Journal of Earth System Science 123, 923–934.
• Dutta, S., Bhattacharya, S., Raju, S.V., 2013. Biomarker signatures from Neoproterozoic-Early Cambrian oil, western India. Organic Geochemistry 56, 68–80.
• Chatterjee, A., Bhattacharya, S., 2013. Identification of regional-scale cuspate–lobate folds in Singhbhum region, India using satellite remote sensing. Current Science 104, 31–34.

• IDC 631 Geochemistry
• IDC 203 Introduction to Earth Sciences
• EES 301 Sedimentology and Concepts in Stratigraphy
• EES 640 Global Tectonics
• EES 402 Geomorphology and Earth Surface Processes

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