| Title | Evaluating the models of stomatal conductance response to humidity in a tropical rain forest of Xishuangbanna, southwest China |
| Author | Li, Zhiheng |
| Publication | HYDROLOGY RESEARCH |
| Year | 2011 |
| Volume | 42 |
| Issue | 4 |
| Corresponding Author | Zhang, YP |
| Abstract | The ecosystem-level fluxes of water vapour and carbon dioxide were measured from 2003 to 2006 at a tropical rain forest in Xishuangbanna, southwest China, using the eddy covariance (EC) technique. These flux measurements allowed the canopy-level evaluation of stomatal conductance (g) response to humidity models. The results showed that both the BWB model and the Leuning model discussed here underestimated g at high humidity and overestimated g at the mid-to-low range of humidity. In contrast, the Wang models discussed here (model-h(a) and model-D-a) perfectly described the relationship of g response to humidity. The model comparison results also demonstrated high consistency over all the observation years. The good performance of the Wang model-h(a) and model-D-a indicated that stomatal conductance responds more sensitively to humidity deficit or water vapour pressure deficit than to relative humidity itself at canopy level. |
