Deciphering Land Carbon Sinks: Integrating Data, Models, and Observations

Yang, Tackang

B031
Deciphering Land Carbon Sinks: Integrating Data, Models, and Observations

Session ID#: 251243

Session Description:

Land carbon sinks offset roughly one-third of anthropogenic CO₂ emissions, but their magnitude and underlying drivers remain uncertain. Researchers employ top-down approaches (e.g., atmospheric inversions) and bottom-up models (e.g., dynamic global vegetation models) to estimate land carbon fluxes. Top-down models constrain net fluxes at broad scales but struggle to partition components at finer resolutions. Bottom-up models represent process-level mechanisms but often suffer from structural and scaling biases. Despite methodological advances, spatial and temporal discrepancies persist between these two approaches. These inconsistencies may result from limited long-term observations in tropical regions, incompletely characterized ecosystem responses (e.g., to climate change, vegetation mortality, and carbon allocation), and insufficient representation of key processes (e.g., disturbance-induced or anthropogenic degradation). This session invites contributions aimed at reducing these uncertainties using in-situ or remote sensing observations, innovative modeling techniques, or integrative frameworks to reconcile divergent estimates and improve the robustness of land carbon sink assessments.

Index Terms:

0428 Carbon cycling [BIOGEOSCIENCES]
0480 Remote sensing [BIOGEOSCIENCES]
1630 Impacts of global change [GLOBAL CHANGE]
1631 Land/atmosphere interactions [GLOBAL CHANGE]

Primary Convener: Tackang Yang, Seoul National University, Interdisciplinary Program in Lanscape Architecture, Seoul, Korea, Republic of (South)

Conveners: Youngryel Ryu, Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), Dr. Changhyun Choi, Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, Korea, Republic of (South) and Huiqi Wang, University of California Berkeley, Department of Civil and Environmental Engineering, Berkeley, United States

Student/Early Career Convener: Jianing Fang, Columbia University, Department of Earth and Environmental Engineering, New York, United States

The 2023 Canadian Heat-drought Enhances Net Forest CO₂ Uptake Via Reduced Respiration (1846645)

Guanyu Dong¹, Fei Jiang¹, Yongguang Zhang², Weimin Ju³, Shilong Piao⁴, Philippe Ciais⁵, Wouter Peters⁶, Ingrid Luijkx⁷, Junjie Liu⁸, Frederic Chevallier⁹, Ning Zeng¹⁰, Xiangjun Tian¹¹, Shamil S Maksyutov¹², Oliver Sonnentag¹³, Muhammad Altaf Arain¹⁴, Alan Barr¹⁵, Yuanyuan Huang¹⁶, Chao Yue¹⁷, Wenping Yuan¹⁸, Prof. Liangyun Liu¹⁹, Lei Fan²⁰, Xu Yue²¹, Jingfeng Xiao²², Xing Li²³, Stephen Sitch²⁴, Pierre Friedlingstein²⁴, Michael O'Sullivan²⁵, Juergen Knauer²⁶, Vivek Arora²⁷, Daniel Kennedy²⁸, Lei Ma²⁹, Peter E Thornton³⁰, Roland Séférian³¹, Tobias Nützel³², Jens Heinke³³, Qing Sun³⁴, Sönke Zaehle³⁵, Philippe P Peylin³⁶, Etsushi Kato³⁷, Haley Alcock³⁸, Bruno Lecavalier³⁹, Mousong Wu¹, Jun Wang¹, Lingyu Zhang², Guoyuan Lv⁴⁰, Yuanyuan Zhang⁴⁰, Dayang Zhao⁴⁰ and Jing Ming Chen⁴¹, (1)Nanjing University, Nanjing, China, (2)Nanjing University, International Institute for Earth System Science, Nanjing, China, (3)Nanjing University, Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing, China, (4)Peking University, Institute of Carbon Neutrality, Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Beijing, China, (5)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France, (6)Environmental Sciences Group, Wageningen University, P.O. Box 47, 6700AA Wageningen, The Netherlands, Wageningen, Netherlands, (7)Wageningen University and Research Center, Meteorology and Air Quality Department, Wageningen, Netherlands, (8)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (9)Institut Pierre Simon Laplace, LSCE, Gif-sur-Yvette Cedex, France, (10)University of Maryland, College Park, MD, United States, (11)Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China, (12)NIES, Tsukuba, Japan, (13)University of Montreal, Département de Géographie, Montreal, QC, Canada, (14)McMaster University, School Of Earth, Environment and Society, Hamilton, ON, Canada, (15)University of Saskatchewan, School of Environment and Sustainability, Saskatoon, SK, Canada, (16)Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, China, (17)Northwest A&F University, Yangling, China, (18)Peking University, College of Urban and Environmental Sciences, Beijing, China, (19)Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China, (20)Southwest University, School of Geographical Sciences, Chongqing, China, (21)College of Natural Resources and Environment, Northwest A&F University, Yangling, China, Yangling, China, (22)University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Earth Systems Research Center, Durham, United States, (23)Sun Yat-sen University, The School of Geography and Planning, Guangzhou, China, (24)University of Exeter, Faculty of Environment, Science and Economy, Exeter, United Kingdom, (25)University of Leeds, College of Engineering, Mathematics, and Physical Sciences, Leeds, United Kingdom, (26)University of Technology Sydney, School of Life Sciences, Faculty of Science, Ultimo, NSW, Australia, (27)Environment and Climate Change Canada, Canadian Centre for Climate Modelling and Analysis, Victoria, BC, Canada, (28)National Center for Atmospheric Research, Boulder, CO, United States, (29)University of Maryland, College Park, Geographical sciences, College Park, United States, (30)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States, (31)Centre National de Recherches Météorologiques, Université de Toulouse, Météo-France, CNRS UMR 3589, Toulouse, France, Toulouse, France, (32)Ludwig Maximilians University of Munich, Munich, Germany, (33)Potsdam Institute for Climate Impact Research (PIK), member of the Leibniz Association, P.O. Box 60 12 03, 14412 Potsdam, Germany, Potsdam, Germany, (34)University of Bern, Zurich, Switzerland, (35)Max Planck Institute for Biogeochemistry, Jena, Germany, (36)CEA Saclay DSM / LSCE, Gif sur Yvette, France, (37)National Institute for Environmental Studies, Tsukuba, Japan, (38)Université de Montréal, Département de géographie, Montréal, QC, Canada, (39)Université de Montréal, Département de géographie, Montréal, Canada, (40)Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, 210023, China, Nanjing, China, (41)University of Toronto, Department of Geography and Planning, Toronto, Canada

Global model data fusion to unravel land carbon sinks and their changes (Invited) (1859477)

Pierre Gentine¹, Jianing Fang¹ and Wenli Zhao², (1)Columbia University, Department of Earth and Environmental Engineering, New York, United States, (2)Columbia University, Department of Earth and Environmental Engineering, New York, NY, United States

Quantifying the Effects of Blue Carbon Storage Considering Coastal Landscape Change in Hatiya and Manpura Islands of Bangladesh: A Remote Sensing Approach (1879904)

Khan Mohammad Ibtehal, Taspiya Hamid, Nigomananda Biswas, Shafiq Reza, Abdullah Al Mahmud and Md Minarul Hoque, Bangabandhu Sheikh Mujibur Rahman Maritime University, Oceanography and Hydrography, Dhaka, Bangladesh

Wall-to-wall forest height growth mapping of the Republic of Korea (1885060)

Tackang Yang¹, Youngryel Ryu², Dr. Changhyun Choi³, Sungchan Jeong⁴, Yunsoo Nam⁵ and Jooseo Lee², (1)Seoul National University, Interdisciplinary Program in Lanscape Architecture, Seoul, Korea, Republic of (South), (2)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (3)Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, Korea, Republic of (South), (4)Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, South Korea, (5)Seoul National University, Department of Lanscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South)

Detecting Overlooked Wildfire Impacts on Forest Structure with Terrestrial and UAV Laser Scanning in the 2025 Korea Wildfire (1885305)

Seongwoo Jo^1,2, Youngryel Ryu¹, Dr. Changhyun Choi³, Tackang Yang⁴ and Yunsoo Nam⁵, (1)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (2)Seoul National University, Integrated Major in Smart City Global Convergence, Seoul, Korea, Republic of (South), (3)Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, Korea, Republic of (South), (4)Seoul National University, Interdisciplinary Program in Lanscape Architecture, Seoul, Korea, Republic of (South), (5)Seoul National University, Department of Lanscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South)

Terrestrial LiDAR Reveals Post-Fire Tree-level Biomass Loss in Korean Forests (1885367)

Dr. Changhyun Choi¹, Youngryel Ryu², Seongwoo Jo², Yunsoo Nam³ and Tackang Yang⁴, (1)Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, Korea, Republic of (South), (2)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (3)Seoul National University, Department of Lanscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (4)Seoul National University, Interdisciplinary Program in Lanscape Architecture, Seoul, Korea, Republic of (South)

Towards Generalized Individual Tree Segmentation Using Transformer and Synthetic Dataset (1887724)

Yunsoo Nam^1,2, Youngryel Ryu^2,3, Tackang Yang⁴, Dr. Changhyun Choi⁵ and Heeju Mun⁶, (1)Seoul National University, Department of Lanscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (2)Seoul National University, Integrated Major in Smart City Global Convergence, Seoul, Korea, Republic of (South), (3)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, Korea, Republic of (South), (4)Seoul National University, Interdisciplinary Program in Lanscape Architecture, Seoul, Korea, Republic of (South), (5)Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul, Korea, Republic of (South), (6)Seoul National University, Department of Landscape Architecture and Rural Systems Engineering, Seoul, South Korea

Leveraging atmospheric benchmarks for informing land carbon sinks: Moving beyond the top-down vs bottom-up paradigm (Invited) (1901344)

Anna M Michalak, Stanford University, Stanford, United States; Carnegie Institution for Science, Department of Global Ecology, Stanford, United States, Kelsey T Foster, Jet Propulsion Laboratory, Pasadena, CA, United States, Wu Sun, Carnegie Institution for Science Stanford, Department of Global Ecology, Stanford, United States and Jiaming Wen, Cornell University, School of Integrative Plant Science, Soil and Crop Sciences Section, Ithaca, United States

Assessment of High CO₂ Growth Anomalies in 2023 and 2024 from the Mauna Loa CO₂ record (1902148)

Madat Sardarli, University of California San Diego, La Jolla, CA, United States, Eric James Morgan, Scripps Institution of Oceanography, La Jolla, CA, United States and Ralph F Keeling, Univ California San Diego, La Jolla, CA, United States

Machine Learning-Based Hourly Gross Primary Productivity Estimation Using Geostationary Satellite: Evaluate the Impact of Aerosol-Induced Radiation Dynamics (1907138)

Sejeong Bae¹, Bokyung Son¹, Taejun Sung¹, Yoojin Kang¹, Jungho Im², Sihyun Lee¹, Gyeongbin Lee¹, Seyoung Yang³ and Garyung Lee¹, (1)Ulsan National Institute of Science and Technology, Department of Civil, Urban, Earth, and Environmental Engineering, Ulsan, South Korea, (2)Ulsan National Institute of Science and Technology, Civil Urban Earth and Environmental Engineering, Ulsan, South Korea, (3)Ulsan National Institute of Science and Technology, Ulsan, South Korea

SIFLUXCOM: Towards improving spatial generalization in gross primary productivity by synthesizing eddy covariance measurements and solar-induced chlorophyll fluorescence (1915384)

Xin Yu¹, Martin Jung¹, Sophia Walther¹, Jacob A Nelson¹, Gregory Duveiller¹, Markus Reichstein² and Christian Reimers¹, (1)Max Planck Institute for Biogeochemistry, Department of Biogeochemical Integration, Jena, Germany, (2)Max Planck Institute for Biogeochemistry, Jena, Germany

Seasonal and Regional Variations in the Changing Trends of Forest Carbon Absorption in South Korea (1938569)

Juhan Park, National Center for AgroMeteorology, Seoul, Korea, Republic of (South), Sungsik Cho, Seoul National University, Seoul, Korea, Republic of (South), Minseok Kang, Gangneung-Wonju National University, Department of Atmospheric and Environmental Sciences, Seoul, South Korea, Seungwon Sohn, National Center for AgroMeteorology, Seoul, South Korea and Park Go Eun, National Institute of Forest Science, Seoul, South Korea

Reconciling Land Carbon Sinks with Greenhouse Gas Partial Columns (1939206)

Nicholas Parazoo¹, Dustin Carroll², A. Anthony Bloom³, Nicole S Lovenduski⁴, Michael Keller⁵ and David Schimel³, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Moss Landing Marine Laboratories, San José State University, Moss Landing, United States, (3)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (4)University of Colorado, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States, (5)USDA Forest Service, Rio Piedras, United States

Harmonized Anthropogenic Land Fluxes Indicate a 56 Pg Carbon Missing Sink in the Cumulative Global Carbon Budget Since 1930 (1971082)

Anthony P Walker¹, Wolfgang Obermeier², Michael O'Sullivan³, Julia Pongratz², Pierre Friedlingstein⁴, Charles Koven⁵, Clemens Schwingshackl⁶ and Stephen Sitch⁴, (1)Oak Ridge National Laboratory, Oak Ridge, United States, (2)Ludwig-Maximilians-Universität München, Geography, Munich, Germany, (3)University of Leeds, College of Engineering, Mathematics, and Physical Sciences, Leeds, United Kingdom, (4)University of Exeter, Faculty of Environment, Science and Economy, Exeter, United Kingdom, (5)Lawrence Berkeley National Laboratory, Climate & Ecosystem Sciences Division, Berkeley, United States, (6)ETH Swiss Federal Institute of Technology Zurich, Geography, Zurich, Switzerland

Understanding the causes of the unprecedented growth of atmospheric CO₂ in 2024 (1975784)

John B Miller¹, Xin Lan^1,2, Andrew R Jacobson^1,3, Bharat Rastogi⁴, Aleya Kaushik^1,5, Gabrielle Petron^1,6, James Tremper Randerson⁷, Yang Chen⁷, Guido van der Werf⁸, Roland Vernooij⁸, Sylvia Michel⁹, Jianghanyang Li¹⁰ and Sudhanshu Pandey¹¹, (1)NOAA, Global Monitoring Laboratory, Boulder, United States, (2)University of Colorado Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States, (3)University of Colorado at Boulder, CIRES, Boulder, United States, (4)University of Colorado Boulder, Geography, Boulder, United States, (5)University of Colorado, Cooperative Institute for Research in Environmental Sciences and Dept. of Atmospheric and Oceanic Sciences, Boulder, United States, (6)University of Colorado, Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States, (7)University of California Irvine, Earth System Science, Irvine, United States, (8)Wageningen University and Research, Wageningen, Netherlands, (9)University of Colorado Boulder, Institute for Arctic and Alpine Research, Boulder, United States, (10)University of Colorado at Boulder, Institute of Arctic and Alpine Research, Boulder, United States, (11)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States

The Dominant Role of Drylands in Global Net Carbon Flux Interannual Variability Persists With Different Dryland Biome Classifications (1975985)

Liam Bogucki¹, Andrew Feldman², David JP Moore³, Lixin Wang⁴, Julia K. Green⁵, Cibele H Amaral⁶, Flurin Babst⁷, Dennis S Ojima⁸, Rubaya Pervin⁹, Sasha Reed¹⁰, William Kolby Smith³, Wen Zhang³ and Natasha MacBean¹¹, (1)University of Western Ontario, Department of Biology, London, ON, Canada, (2)University of Maryland College Park, College Park, United States, (3)University of Arizona, School of Natural Resources and the Environment, Tucson, AZ, United States, (4)Indiana University Indianapolis, Indianapolis, United States, (5)University of Arizona, Tucson, AZ, United States, (6)University of Colorado Boulder, CIRES, Earth Lab, Boulder, United States, (7)University of Arizona, Tucson, United States, (8)Colorado State University, Natural Resource Ecology Laboratory, Fort Collins, CO, United States, (9)Indiana University Bloomington, Bloomington, IN, United States, (10)U.S. Geological Survey, Southwest Biological Science Center, Moab, United States, (11)Western University, Department of Geography & Environment and Department of Biology, London, Canada

Improving Simulation of Soybean Canopy Photosynthesis by Incorporating Realistic 3D Canopy Structure (1985585)

Xinlei Wang¹, Kaiyu Guan¹, Sheng Wang¹, Albert J Zhai², Shenlong Wang², Brian Bailey³, Elizabeth A. Ainsworth⁴, Zhao Jiang¹ and Kaiyuan Li¹, (1)University of Illinois Urbana-Champaign, Agroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, Urbana, United States, (2)University of Illinois Urbana-Champaign, Urbana, United States, (3)University of California Davis, Department of Plant Sciences, Davis, United States, (4)University of Illinois Urbana-Champaign, Department of Plant Biology and Carl. R. Woese Institute for Genomic Biology, Urbana, United States

Temperature Thresholds Drive Latitudinal Divergence In Herbaceous Ecosystem Carbon Balance (1991852)

Hang Li, Fei Jiang and Guanyu Dong, Nanjing University, Nanjing, China

Assessing the Terrestrial CO₂ Budget over Asia through Integrated Analyses of Bottom-Up and Top-Down Approaches (1997927)

Kazuhito Ichii, Chiba University, Center for Environmental Remote Sensing, Chiba, Japan, Misaki Hase, Center for Environmental Remote Sensing, Chiba University, Chiba, Japan and Daniel Henri, Chiba University, Chiba, Japan

See more of: Biogeosciences

<< Previous Session Proposal | Next Session Proposal >>

B031 Deciphering Land Carbon Sinks: Integrating Data, Models, and Observations

Session Description:

Index Terms:

B031
Deciphering Land Carbon Sinks: Integrating Data, Models, and Observations