Characteristics of eddy covariance fluxes in a Japanese cedar forest in Xitou, Taiwan

The forests in Taiwan situated in the mountain regions from 500 to 2,500 m asl are so-called the montane cloud forest ecosystem, frequently affected by fog. In such forests, the leaves can be wet by fog and rain to a considerable duration, affecting the processes in evapotranspiration. The Xitou long-term ecosystem research site (23°39'57" N, 120°47'44.5" E, 1267 m above mean sea level) in the Experimental Forest of National Taiwan University, is located in the Nantou County, Central Taiwan, where the flux and meteorological measurements are conducted since 2009 on the tower with the height of 40 m in a plantation of Japanese cedar (Cryptomeria japonica). There are two distinct seasons in the Xitou area: a relatively dry season from October to April and a wet season from May to September. We installed the LI-7200RS enclosed CO2/H2O gas analyzer (LI-COR) in October 2019 for reliable flux measurements. We are trying to clarify the characteristics of evapotranspiration of this forest, particularly the effects of fog and rain and their seasonality. This presentation will show the results of eddy covariance flux measurements using LI-7200RS enclosed CO2/H2O gas analyzer, focusing on the difference in the characteristics of evapotranspiration between wet and dry seasons. This research was supported by MOST (grant #109-2313-B-002-051-MY3).