[A-CG61] Carbon Cycle Observation and Analysis

Tue. May 26, 2026 3:30 PM - 5:00 PM Exhibition Hall Special Setting (4) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:Patra Prabir(Principal Scientist at Research Institute for Global Change, JAMSTEC and Professor at Research Institute for Humanity and Nature), Ito Akihiko(University of Tokyo)

The Paris Agreement under the United Nations Framework Convention on Climate Change (UNFCCC) aims at reduction of greenhouse gases (GHGs) emission to keep global warming below 2 deg C. However, due to uncertainties in sparse observation network and integration methods, large uncertainty remains in GHGs sources/sinks estimations at global and regional scales. The purpose of the session is to discuss state-of-the-art techniques for estimations of GHGs (e.g. CO2, CH4, N2O) budget at global and regional scales. The topic includes natural and anthropogenic processes, various methodologies (e.g. in-situ observation, aircraft monitoring, remote sensing, modeling, integration), and various targets (e.g. atmosphere, land, and ocean), various spatial (local to global) and temporal coverage (past to future). Optimization of observation locations for maximum benefit of flux uncertainty reduction (intelligent network design) is also encouraged in this context. Improved estimates of emissions from land use change, biomass burning, and other anthropogenic sources are also of interest. Presentations are also welcome on the new developments under ongoing activities of the Global Carbon Project (GCP) and WMO Global Greenhouse Gas Watch (G3W).

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3:30 PM - 3:45 PM

[ACG61-07] Decoupling Canopy Architecture and Leaf Quantity to Model Biome-Level Maximum Light Use Efficiency

*Min Chen¹, Hamid Dashti¹ (1. University of Wisconsin-Madison)

3:45 PM - 4:00 PM

[ACG61-08] Biological Processes Underpin the Persistence of Dryland Productivity Following Extreme Wet Years

Yang Chen¹, *Qiaoyun Xie¹, Sally E Thompson¹ (1. University of Western Australia)

4:00 PM - 4:15 PM

[ACG61-09] Global harmonization of data-driven soil carbon and heterotrophic respiration maps

*Shoji Hashimoto^1,2, Akihiko Ito², Kazuya Nishina³ (1. Forestry and Forest Products Research Institute, 2. The University of Tokyo, 3. National Institute for Environmental Studies)

4:15 PM - 4:30 PM

[ACG61-10] Quantification of the DRC humid tropical forest carbon sink due to three decades of post-deforestation/degradation forest regrowth

*Myung Sik Cho¹, David P. Roy^1,2, Herve Kashongwe¹, Vladyslav Oles³, Jean Robert Bwangoy⁴ (1. Center for Global Change and Earth Observations, Michigan State University, 2. Department of Geography, Environment, and Spatial Sciences, Michigan State University, 3. Department of Forest Rangeland and Fire Sciences, University of Idaho, 4. Department of Natural Resource Management, Faculty of Agronomy, University of Kinshasa)

4:30 PM - 4:45 PM

[ACG61-11] Heatwave induced tipping of terrestrial carbon uptake estimated using geostationary satellite observations

*Jongho Kim¹, Sujong Jeong¹ (1. Seoul National Univ.)

4:45 PM - 5:00 PM

[ACG61-12] A Systematic Evaluation of Robustness in a Network-Calibrated Gross Primary Productivity Framework for India

*Yuji Shigefuji¹, Abhishek Chakraborty², Syam Chintala³, Pramit Kumar Deb Burman⁴, Yogesh K. Tiwari⁴, Dipankar Sarma⁴, Nirmali Gogoi⁵, G. S. Bhat¹, Ross Morrison⁶, K. Sreelash⁷, Phanindra K.B.V.N.³, Sachin D. Ghude⁴, Eswar Rajasekaran⁸, Keisuke Ono⁹, Gilles Boulet^10,11, Sandipan Mukherjee¹², Priyanka Lohani¹², Kasturi Chakraborty¹³, Sudheer Annepu¹⁴, Suraj Reddy Rodda¹⁵, Adam J. Liska¹⁶, Mahesh Pathakoti¹⁵, Sekhar Muddu^1,11 (1. Indian Institute of Science, Bangalore, 2. Sierra Nevada Research Institute, University of California, Merced, 3. Indian Institute of Technology Hyderabad, 4. Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, 5. Tezpur University, 6. UK Centre for Ecology & Hydrology, 7. National Centre for Earth Science Studies, 8. Indian Institute of Technology Bombay, 9. National Institute for Agro-Environmental Sciences, 10. CESBIO, Université de Toulouse, CNES, CNRS, IRD, INRAE, 11. Indo-French Cell for Water Science, Indian Institute of Science, 12. G.B. Pant Institute of Himalayan Environment and Development, 13. North Eastern Space Applications Centre, 14. ICAR-Indian Institute of Soil and Water Conservation, 15. National Remote Sensing Centre, Indian Space Research Organisation, 16. University of Nebraska-Lincoln)

Session information