Identification

Title

Urban carbon dioxide cycles within the Salt Lake Valley: A multiple-box model validated by observations

Abstract

A multiple-box model was developed to determine how meteorological, anthropogenic, and biological processes combine to produce diel cycles of carbon dioxide (CO₂) mole fraction during each of the four calendar-based seasons within Salt Lake Valley, Utah, USA. The model was forced by observed winds, sounding-derived mixing depths, an anthropogenic CO₂ emissions inventory, and net biological flux estimates based on temperature, solar radiation, and ecosystem type. The model was validated using hourly CO₂ mole fractions measured at five sites in the urban Salt Lake Valley (uSLV) area for 2005 - 2009 (spatial average of observations denoted by Cobs). The model accounted for 53% of Cobs on an hourly basis, and accounted for 90 - 94% of the mean diel cycle of Cobs depending on season. The multiple-box model results indicated that CO₂ change rates within the uSLV mean diel cycles were largely the result of imbalances between anthropogenic processes adding CO₂ and meteorological processes removing or diluting CO₂. Removal by wind (advection) was the most important CO₂ reduction process on average, but dilution of CO₂ by entrainment of air from above the mixing height overtook advection in importance between sunrise and midday. During summer mornings, CO₂ reduction attributable to photosynthesis below shallow mixing heights was of intermediate importance between advection and entrainment, but the overall net effect of biological processes was the least important influence on CO₂ change rates during each of the four seasons.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7n29xjg

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

2011-08-11T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

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