The 2025–2026 archive

Talks & conversations

Explore the Saturday Talk Series, expert lectures, and special talks through the original flyers and research summaries.

First anniversary · Special talk

Past and Present Circulation Dynamics of the Indian Ocean

Prof. Sunil Kumar Singh

Director, CSIR–National Institute of Oceanography, Goa

Saturday, 10 October 2026
11:00 AM IST · 05:30 UTC
Online · Microsoft Teams

Celebrating one year of connecting early-career researchers in paleosciences. All are welcome.

A year of scientific exchange

The series brings early-career researchers and invited experts together for scientific exchange.

ECR talks create opportunities to present research and connect with peers; invited expert talks bring scientific expertise, research journeys, and perspectives from established researchers.

Source: Annual Report 2025–26, covering October 2025 to October 2026. Figures are reported snapshots, not live counts. Read the final annual report

12 of 12 talks
These are past events. Dates and times are reproduced from the supplied flyers; the series name is retained even when a flyer lists a different weekday. Watch recording opens the matching talk video. Where a recording is not currently listed on the channel, its availability is noted.
Expert talk · No. 12
6 September 2026   ·   11:00–12:00 IST

Zircon Detectives: Decoding Source to Sink

Dr. Kumar Batuk Joshi

Central University of Himachal Pradesh, Kangra, India

High-resolution imaging and in situ U–Pb analyses reveal zircon age, internal structure, and geochemistry. This talk examines detrital zircon as a provenance tracer and the limitations of reconstructing source-to-sink relationships.

Saturday Talk Series · No. 11
16 August 2026   ·   11:00–12:00 IST

The Toba Supereruption and Human Prehistory: Current Debates, Challenges, and Future Directions

Dr. Sourav Mukhopadhyay

Captain Williamson Sangma State University, Tura, Meghalaya, India

The ~74 ka Toba supereruption is discussed through geological and archaeological evidence, including debates about the volcanic winter hypothesis, human resilience, methodological challenges, and adaptation.

Special talk · No. 10
27 July 2026   ·   16:00 IST

Holocene abrupt climate changes

Dr. Yama Dixit

Centre for Atmospheric Sciences, IIT Delhi

Evidence from paleoclimate archives is used to examine abrupt events against the background climate of the Holocene, their global impacts, their causes, and mechanisms of propagation.

Original flyerRecording not currently listed
Saturday Talk Series · No. 09
27 June 2026   ·   12:00–13:00 IST

Black Carbon / Soot: An Important Climatic Forcer

Mr. Madhav Prasad Mishra

Birbal Sahni Institute of Palaeosciences, Lucknow

An introduction to soot, its role in climate and the global carbon cycle, and its characterisation using geochemical and biomolecular tracers, NMR, SEM-EDX, and Raman techniques. Sources discussed include biomass and fossil-fuel burning.

Original flyerRecording not currently listed
Saturday Talk Series · No. 08
30 May 2026   ·   12:00–13:00 IST

Beyond the smoke: decoding and unravelling biomass burning signatures in environmental archives

Dr. Ankit Yadav

University of Goettingen, Germany

Reliable identification of levoglucosan, mannosan, and galactosan is essential for reconstructing past fires. Targeted mass-spectrometric approaches help separate isomers and improve interpretation of diagnostic ratios and combustion sources.

Saturday Talk Series · No. 07
9 May 2026   ·   12:00–13:00 IST

Illuminating the Past: Applications of OSL Dating in Quaternary Geoscience

Dr. Mahadev Rawat

Borehole Geophysics Research Laboratory, MoES, Karad, Maharashtra

Principles and applications of optically stimulated luminescence dating for sediment chronologies, fluvial dynamics, paleo-floods, and landscape evolution. Indian river examples accompany discussion of uncertainty and methodological challenges.

Saturday Talk Series · No. 06
11 April 2026   ·   12:00–13:00 IST

Southern whispers in the Northern sea: Paleo productivity and Climate linkages in the Bay of Bengal

Dr. Barnita Banerjee

CSIR-NGRI, India

Organic–inorganic geochemistry and micropaleontology from IODP U1446 in the western Bay of Bengal are used to investigate productivity over approximately 1.3 million years, monsoon controls, stratification, and glacial–interglacial variability across the Mid-Pleistocene Transition.

Saturday Talk Series · No. 05
21 March 2026   ·   12:00–13:00 IST

Ocean circulation and Ice sheet controls on Australian Hydroclimate

Dr. Himadri Saini

University of Melbourne, Australia

Earth system model experiments use past climates to examine links between large-scale ocean circulation, polar ice sheets, global climate reorganisation, and regional Australian rainfall.

Saturday Talk Series · No. 04
7 March 2026   ·   12:00–13:00 IST

Measuring Past Ocean Temperature Variability: Techniques and Uncertainties

Dr. Shubham Tripathi

Sophisticated Analytical & Technical Help Institute (SATHI), BHU, India

An overview of paleotemperature proxies, their strengths and limitations, analytical considerations in trace-metal measurement, and eastern Arabian Sea Mg/Ca variability during the Mid-Pleistocene Transition.

Saturday Talk Series · No. 03
31 January 2026   ·   12:00–13:00 IST

Pyrite oxidation in the northwestern Himalayan Rivers: Sulfur and oxygen isotopic evidence for a long-term CO₂ source

Dr. Rakesh Kumar Rout

Ariel University, Ariel, Israel

Stable sulfur and oxygen isotopes of dissolved sulfate are used to investigate pyrite oxidation in northwestern Himalayan river basins. The talk considers sulfuric-acid weathering of carbonates and its implications for long-term carbon cycling.

Saturday Talk Series · No. 02
17 January 2026   ·   12:00–13:00 IST

Centennial-scale intensifications of the Atlantic Meridional Overturning Circulation during Heinrich Stadial 1

Dr. Partha Sarathi Jena

Shantou University, China

Evidence for centennial-scale AMOC intensifications during Heinrich Stadial 1 and their climatic consequences, with particular attention to South American precipitation and atmospheric CO₂ changes.

Saturday Talk Series · No. 01
27 December 2025   ·   12:00 IST

Abrupt Climatic Events (ACE) of the Holocene Epoch and the Indian Summer Monsoon

Dr. Upasana Banerji

Paleoclimatologist

Natural archives are used to examine Indian Summer Monsoon responses to globally recognised Holocene abrupt climatic events, including 8.2 ka and 4.2 ka events and their regional hydroclimatic expression.

Original material