气候变化领域集成服务门户(CCPortal): The influence of long-term changes in canopy structure on rainfall interception loss: A case study in Speulderbos; the Netherlands

CCPortal

DOI	10.5194/hess-22-3701-2018
	The influence of long-term changes in canopy structure on rainfall interception loss: A case study in Speulderbos; the Netherlands
	Cisneros Vaca C.; Van Der Tol C.; Ghimire C.P.
发表日期	2018
ISSN	1027-5606
起始页码	3701
结束页码	3719
卷号	22 期号:7
英文摘要	The evaporation of intercepted water by forests is a significant contributor to both the water and energy budget of the Earth. In many studies, a discrepancy in the water and energy budget is found: the energy that is needed for evaporation is larger than the available energy supplied by net radiation. In this study, we analyse the water and energy budget of a mature Douglas fir stand in the Netherlands, for the two growing seasons of 2015 and 2016. Based on the wet-canopy water balance equation for these two growing seasons, derived interception losses were estimated to be 37 and 39 % of gross rainfall, respectively. We further scrutinized eddy-covariance energy balance data from these two consecutive growing seasons and found the average evaporation rate during wet-canopy conditions was 0.20 mm h-1. The source of energy for this wet-canopy evaporation was net radiation (35 %), a negative sensible heat flux (45 %), and a negative energy storage change (15 %). This confirms that the energy for wet-canopy evaporation is extracted from the atmosphere as well as the biomass. Moreover, the measured interception loss at the forest was similar to that measured at the same site years before (I = 38 %), when the forest was younger (29 years old, vs. 55 years old in 2015). At that time, the forest was denser and had a higher canopy storage capacity (2.4 mm then vs. 1.90 mm in 2015), but the aerodynamic conductance was lower (0.065 m s-1 then vs. 0.105 m s-1 in 2015), and therefore past evaporation rates were lower than evaporation rates found in the present study (0.077 mm h-1 vs. 0.20 mm h-1 in 2015). Our findings emphasize the importance of quantifying downward sensible heat flux and heat release from canopy biomass in tall forest in order to improve the quantification of evaporative fluxes in wet canopies. © 2018 Author(s).
语种	英语
scopus关键词	Budget control; Digital storage; Evaporation; Forestry; Rain; Aerodynamic conductances; Canopy conditions; Interception loss; Rainfall interception; Sensible heat flux; Water and energies; Water balance equation; Wet canopy evaporation; Heat flux; canopy architecture; coniferous forest; eddy covariance; energy budget; evaporation; forest ecosystem; growing season; interception; long-term change; net radiation; rainfall; water budget; Netherlands; Pseudotsuga; Pseudotsuga menziesii
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159978
作者单位	Cisneros Vaca, C., Faculty of Geo-information and Earth Observation (ITC), University of Twente, P.O. Box 217, Enschede, 7500 AE, Netherlands; Van Der Tol, C., Faculty of Geo-information and Earth Observation (ITC), University of Twente, P.O. Box 217, Enschede, 7500 AE, Netherlands; Ghimire, C.P., Faculty of Geo-information and Earth Observation (ITC), University of Twente, P.O. Box 217, Enschede, 7500 AE, Netherlands
推荐引用方式 GB/T 7714	Cisneros Vaca C.,Van Der Tol C.,Ghimire C.P.. The influence of long-term changes in canopy structure on rainfall interception loss: A case study in Speulderbos; the Netherlands[J],2018,22(7).
APA	Cisneros Vaca C.,Van Der Tol C.,&Ghimire C.P..(2018).The influence of long-term changes in canopy structure on rainfall interception loss: A case study in Speulderbos; the Netherlands.Hydrology and Earth System Sciences,22(7).
MLA	Cisneros Vaca C.,et al."The influence of long-term changes in canopy structure on rainfall interception loss: A case study in Speulderbos; the Netherlands".Hydrology and Earth System Sciences 22.7(2018).