Spatial and Temporal Patterns of CO2, CH4, and N2O Fluxes in Ecosystems
Date: Wednesday, September 28 @ 09:00:00 MDT
Topic:
by Hangin Tian
The
magnitude and spatial pattern of the emissions of CO2, CH4
and N2O from China’s
terrestrial ecosystems are poorly understood. In this study, we have used a
coupled biogeochemistry model in conjunction with remote-sensing and field data
to quantify spatial and temporal patterns of CO2, CH4 and
N2O fluxes in the terrestrial ecosystems of China since
1980. We have documented the patterns of land-use change across China from 1980
to present and quantified the consequences of land transformations on
productivity in natural and managed ecosystems. We also examine how the fluxes
of CO2, CH4 and N2O 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 through using factorial simulation experiments with the coupled
biogeochemistry model. The estimates of CO2, CH4 and N2O
emissions from the terrestrial ecosystems of China are evaluated through
comparisons with the results of field studies within China.
Link to Abstract
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