2025.10.8-10　学生優秀発表賞を受賞しました

10月8日から3日間の会期で開催された第30回大気化学討論会において、当研究室のD3のUddalak Chakraborty君がポスター発表にて学生優秀発表賞を受賞しました。大気化学討論会は日本大気化学会の研究集会であり、室内実験から衛星観測まで大気化学に関する幅広い研究テーマの研究発表を行う場となっています。大気化学討論会では毎回、学会の運営委員会による審査をもとに、優れた発表（口頭・ポスター）を行った学生に対して学生優秀発表賞を授与しています。今回は5名の学生が受賞しました（N.S.）。

This time, I got the opportunity to present my research on carbon isotope (¹³C and ¹⁴C) at the JpSAC (the Japan Society of Atmospheric Chemistry) annual meeting 2025 as an oral presentation (¹³C) and a poster presentation (¹⁴C) and to discuss them in-depth with leading scientists and researchers. Carbon isotopes in atmospheric CO₂ is useful for differentiating natural and human-induced CO₂ sources and sinks. The combustion of plant-derived fossil fuels contributes ¹³C-depleted carbon into the atmosphere, making it a crucial tracer for separating the budget of atmospheric CO₂. Radiocarbon (¹⁴C), a radioactive isotope of carbon, provides a unique tracer for understanding carbon cycle dynamics. In our research, we prepared the separate exchange fluxes between carbon reservoirs as well as emissions for both isotopes and conducted forward simulations using MIROC4.0 – ACTM for the long-term from 1940 to 2023. Thoughtful questions and suggestions from the conference audiences gave me important perspectives and concrete ideas to strengthen my study. The conference was productive from start to finish and receiving the Student Encouragement Award for our poster on ‘Long-Term Trends and Atmospheric Distribution of Δ¹⁴C in CO₂ Simulated with MIROC4.0-ACTM’ was a wonderful way to conclude it. All the constructive comments and suggestions from my sensei, collaborators and lab members helped me to prepare myself for the presentation. I sincerely thank Saitoh-sensei for this fruitful opportunity (C.U.).