Identification

Title

The impact of biomass heat storage on the canopy energy balance and atmospheric stability in the Community Land Model

Abstract

Atmospheric models used for weather prediction and future climate projections rely on landmodels to calculate surface boundary conditions. Observations of near-surface states and fluxes made atflux measurement sites provide valuable data with which to assess the quality of simulated lower boundaryconditions. A previous assessment of the Community Land Model version 4.5 using data from the NiwotRidge Subalpine Forest AmeriFlux tower showed that simulated latent heat fluxes could be improved byadjusting a parameter describing the maximum leaf wetted area, but biases in midday sensible heat fluxand nighttime momentum flux were generally not reduced by model parameter perturbations. Thesebiases are related to the model’s lack of heat storage in vegetation biomass. A biomass heat capacity isparameterized 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 theheat transfer between the forest biomass and the canopy air space, the biases in the mean midday sensibleheat and mean nighttime momentum fluxes at Niwot Ridge are reduced from 47 to 13 W/m2and from 0.12to−0.03 m/s, respectively. The bias in the mean nighttime canopy air temperature was reduced from−5.9to 0.4∘C. Additional simulations at other flux tower sites demonstrate a consistent reduction in middaysensible heat flux, a lower ratio of the sum of sensible andlatent heat flux to net radiation, and an increasein nighttime canopy temperatures

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d75q504m

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2019-01-01T00:00:00Z

Frequency of update

Quality and validity

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Conformity

Data format

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Constraints related to access and use

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Use constraints

Copypright 2019 Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license.

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact