Spatial Patterns and Mechanisms for Terrestrial Ecosystem Carbon Fluxes in the Northern Hemisphere by Zhi Chen

Author:Zhi Chen
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

5.2.2 Effects of Precipitation Variation on GPP, RE and NEP in Regions

The results showed that the spatial variations of GPP, RE and NEP were consistently influenced by MAP in Asia, Europe and North America, and furthermore the GPP, RE and NEP showed similar response patterns to MAP in the three regions (Fig. 5.2). Overall, GPP increased in a sigmoid shape with MAP, RE increased linearly with MAP, and NEP was controlled by the combined responses of GPP and RE to MAP.

However, the effects of MAP variation on GPP, RE and NEP, and the response rate of GPP, RE and NEP to MAP variation were divergent in the three regions. In the Asian and North American region, MAP showed strong controls on the spatial variations of GPP, RE and NEP. MAP could explain 62, 52 and 22% of the spatial variations of GPP, RE and NEP in Asia (Fig. 5.2a–c), and 46, 54 and 27% in North America, respectively (Fig. 5.2g–i). In the European region, the regulation of MAP on the spatial variations of GPP, RE and NEP was weaker than that in Asia and North America. MAP explained 22, 15 and 18% of the spatial variations of GPP, RE and NEP, respectively (P < 0.05) (Fig. 5.1d–f). At the spatial pattern, RE increased by 101.4, 54.4 and 67.3 g C m−2 year−1 for 100 mm increase in MAP in Asia, Europe and North America, respectively. Thus, the carbon fluxes are more sensitive to changes in precipitation in the Asian region.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.