气候变化领域集成服务门户(CCPortal): The Impact of Biomass Heat Storage on the Canopy Energy Balance and Atmospheric Stability in the Community Land Model

CCPortal

DOI	10.1029/2018MS001476
	The Impact of Biomass Heat Storage on the Canopy Energy Balance and Atmospheric Stability in the Community Land Model
	Swenson S.C.; Burns S.P.; Lawrence D.M.
发表日期	2019
ISSN	19422466
起始页码	83
结束页码	98
卷号	11 期号:1
英文摘要	Atmospheric models used for weather prediction and future climate projections rely on land models to calculate surface boundary conditions. Observations of near-surface states and fluxes made at flux measurement sites provide valuable data with which to assess the quality of simulated lower boundary conditions. A previous assessment of the Community Land Model version 4.5 using data from the Niwot Ridge Subalpine Forest AmeriFlux tower showed that simulated latent heat fluxes could be improved by adjusting a parameter describing the maximum leaf wetted area, but biases in midday sensible heat flux and nighttime momentum flux were generally not reduced by model parameter perturbations. These biases are related to the model's lack of heat storage in vegetation biomass. A biomass heat capacity is parameterized in Community Land Model version 5 with measurable quantities such as canopy height, diameter at breast height, and tree number density. After implementing a parameterization describing the heat transfer between the forest biomass and the canopy air space, the biases in the mean midday sensible heat and mean nighttime momentum fluxes at Niwot Ridge are reduced from 47 to 13 W/m 2 and from 0.12 to −0.03 m/s, respectively. The bias in the mean nighttime canopy air temperature was reduced from −5.9 to 0.4 °C. Additional simulations at other flux tower sites demonstrate a consistent reduction in midday sensible heat flux, a lower ratio of the sum of sensible and latent heat flux to net radiation, and an increase in nighttime canopy temperatures. ©2018. The Authors.
英文关键词	atmospheric stability; biomass heat storage; community land model; eddy covariance; surface energy balance; surface fluxes
语种	英语
scopus关键词	Biomass; Boundary conditions; Climate models; Digital storage; Energy balance; Forestry; Heat storage; Heat transfer; Interfacial energy; Latent heat; Momentum; Specific heat; Atmospheric stability; Community land models; Diameter-at-breast heights; Eddy covariance; Future climate projections; Sensible and latent heat fluxes; Surface boundary conditions; Surface flux; Heat flux; air temperature; atmospheric modeling; biomass; boundary condition; eddy covariance; energy budget; flux measurement; heat budget; latent heat flux; net radiation; seasonal variation; sensible heat flux; surface flux; weather forecasting
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156995
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Department of Geography, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Swenson S.C.,Burns S.P.,Lawrence D.M.. The Impact of Biomass Heat Storage on the Canopy Energy Balance and Atmospheric Stability in the Community Land Model[J],2019,11(1).
APA	Swenson S.C.,Burns S.P.,&Lawrence D.M..(2019).The Impact of Biomass Heat Storage on the Canopy Energy Balance and Atmospheric Stability in the Community Land Model.Journal of Advances in Modeling Earth Systems,11(1).
MLA	Swenson S.C.,et al."The Impact of Biomass Heat Storage on the Canopy Energy Balance and Atmospheric Stability in the Community Land Model".Journal of Advances in Modeling Earth Systems 11.1(2019).