PARENT SESSION
Poster Session 32: Biogeochemistry
Thursday, August 11, 5:00 PM - 6:30 PM, Exhibit Hall 220 A-E, Level 2, Palais des congrès de Montréal
Linking Multi-scale Remotely Sensed Data, Field Observations and Biogeochemistry Models to Evaluate Terrestrial Carbon Budget in China.
Tian, Hanqin1, Melillo, Jerry2, Running, Steven3, Liu, Jiyuan4, Myneni, Ranga5, IDS Project Members, 6, 1 School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, USA2 The Ecosystem Center, Marine Biological Labratory, Woods Hole, MA, USA3 Dept of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT, USA4 Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China5 Department of Geography, Boston University, Boston, MA, USA6 Multiple Institutions, various cities, in China and USA
ABSTRACT- For millennia, Chinese people have altered the landscape in many ways in pursuit of food, fuel and fiber. China expanding economy, which is the fastest growing in the world along with continued population growth, will lead to continued land transformations in the next decades, including dramatic urbanization. While we have a qualitative sense that land transformations across China have affected and will continue to affect the ability of Chinese ecosystems to provide people with essential goods and services, our challenge now is to quantify exactly how the provision of key goods and services has changed. Here we have developed a partnership between Chinese and US scientists to combine remote-sensing data and a set of biogeochemical simulation models to quantify the consequences of land transformations on productivity in forests and other natural ecosystems and carbon sequestration. We document the patterns of land-use change across China from 1980 to present. We also examine how ecosystem goods and services have changed as a result of multiple stresses and interactions among those stresses including land-use change, climate variability, atmospheric composition (carbon dioxide and tropospheric ozone), precipitation chemistry (nitrogen composition), and fire frequency using estimates of gross primary production (GPP), net primary production (NPP) and carbon storage from factorial simulation experiments with three terrestrial biogeochemistry models. Model estimates along with spatial and temporal patterns of GPP, NPP and carbon storage are compared to satellite-derived estimates of these carbon fluxes and pools. The estimates of GPP, NPP and vegetation carbon storage of both of these approaches are evaluated through comparisons with the results of field studies and forest and soil inventories within China. Here we present the first results from a large interdisciplinary research project, an international collaborative effort between US and Chinese Scientists.
Key words: regional carbon budget, multiple scales, ecosystem modeling, remote sensing