A Functional Response Metric for the Temperature Sensitivity of Tropical Ecosystems

Earth Interactions

GretchenKeppel-Aleks¹ 

关键词: Tropics;    Carbon dioxide;    Climate models;    Model evaluation/performance;    Atmosphere-land interaction;    Ecosystem effects;   

DOI  :  10.1175/EI-D-17-0017.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractEarth system models (ESMs) simulate a large spread in carbon cycle feedbacks to climate change, particularly in their prediction of cumulative changes in terrestrial carbon storage. Evaluating the performance of ESMs against observations and assessing the likelihood of long-term climate predictions are crucial for model development. Here, we assessed the use of atmospheric growth rate variations to evaluate the sensitivity of tropical ecosystem carbon fluxes to interannual temperature variations. We found that the temperature sensitivity of the observed growth rate depended on the time scales over which atmospheric observations were averaged. The temperature sensitivity of the growth rate during Northern Hemisphere winter is most directly related to the tropical carbon flux sensitivity since winter variations in Northern Hemisphere carbon fluxes are relatively small. This metric can be used to test the fidelity of interactions between the physical climate system and terrestrial ecosystems within E...

【 授权许可】

Unknown