Data for modelling spatial patterns and determinants of atmospheric carbon dioxide concentrations in Phoenix metro area
Author(s):
- Elizabeth Wentz
- Patricia Gober
- Robert Balling
- Thomas Day
Abstract:
The purpose of this work is to describe determinants and spatial patterns of atmospheric carbon dioxide (CO2) in Phoenix, Arizona. Specifically, we use geographic information systems (GIS) and regression-based analyses to identify the human and biological factors that contribute to spatial and temporal variations in near-surface atmospheric CO2 levels. We use these factors to create estimated surfaces of CO2 for the urban area. We validate our surfaces using independently collected records of CO2 from several monitoring stations and transects. To investigate the temporal patterns and variations of CO2, we were able to generate CO2 surfaces for the early mornings and the afternoons, and on weekdays when traffic is heavy and spatially focused and on weekends when it is lighter and more spatially dispersed. Our findings suggest there is a distinct relationship between the structure of Phoenix CO2 levels and spatial patterns of human activities and vegetation densities. Morning CO2 levels are higher than afternoon levels and correspond closely to the density of traffic, population, and employment. The spatial structure of human activity explains the pattern of CO2 better on weekdays than on weekends. CO2 surfaces reflect declining densities of human activity with distance from the city center, the pattern of irrigated agriculture in the Phoenix area, and riparian habitats on the urban fringe. Spatial and temporal patterns of CO2 are useful in understanding urban climate and ecosystem processes.
Keywords:
Temporal Coverage:
2000-01-16Geographic Coverage:
Geographic Description: Central Arizona PhoenixBounding Coordinates:
Longitude:-112.633003 to -111.368934
Latitude:33.918688 to 33.103611
Contact:
Information Manager,Global Institute of Sustainability,Arizona State University,POB 875402,TEMPE
caplter.data@asu.edu
Methods used in producing this dataset: Show
Data Files (3) :
Spatial Vector: Atmospheric carbon dioxide morning transect data
Description: Morning transect data for modelling spatial patterns and determinants of atmospheric carbon dioxide concentrations in Phoenix metro area
Horizontal Coordinate System:WGS_1984_UTM_Zone_12N
Geometry Type: Point
Column | Description | Type | Units |
---|---|---|---|
FID | Internal feature number. |
OID | |
Shape | Feature geometry. |
Geometry | |
CO2AM_ID | CO2AM_ID |
integer | |
TRANSECT1_ | TRANSECT1 sites |
Float | |
X_COORD | UTM X coordinate in meters |
Float | |
Y_COORD | UTM Y coordinate in meters |
Float | |
POINT_ | site ids for all transects |
float | |
AWT_807 | Average Weekly Traffic as Percent distance of road within
each CO2 monitoring site buffer |
Float | dimensionless |
VEG_807 | Summation of all NDVI values for all grid points that are
within the 807-meter buffer of each CO2 monitoring
site |
Float | number |
EMP_807 | Employment density is the summation of all employees in all
employment points that fell within the buffer of each CO2 monitoring
site |
Float | number |
POP_807 | Population density Derived by multiplying total population
in the US Census tract by the percent are of the buffer of each CO2
monitoring site |
Float | number |
ADDRESS | ADDRESS |
string | |
A1_3_00 | Average CO2 concentration in parts per million per volume
on January 3 2000 morning |
float | dimensionless |
A1_10_00 | Average CO2 concentration in parts per million per volume
on January 10 2000 morning |
float | dimensionless |
A1_4_00 | Average CO2 concentration in parts per million per volume
on January 4 2000 morning |
float | dimensionless |
A1_11_00 | Average CO2 concentration in parts per million per volume
on January 11 2000 morning |
float | dimensionless |
A1_5_00 | Average CO2 concentration in parts per million per volume
on January 5 2000 morning |
float | dimensionless |
A1_12_00 | Average CO2 concentration in parts per million per volume
on January 12 2000 morning |
float | dimensionless |
A1_6_00 | Average CO2 concentration in parts per million per volume
on January 6 2000 morning |
float | dimensionless |
A1_13_00 | Average CO2 concentration in parts per million per volume
on January 13 2000 morning |
float | dimensionless |
A1_7_00 | Average CO2 concentration in parts per million per volume
on January 7 2000 morning |
float | dimensionless |
A1_14_00 | Average CO2 concentration in parts per million per volume
on January 14 2000 morning |
float | dimensionless |
JA1_8_00 | Average CO2 concentration in parts per million per volume
on January 8 2000 morning |
float | dimensionless |
A1_15_00 | Average CO2 concentration in parts per million per volume
on January 15 2000 morning |
float | dimensionless |
A1_9_00 | Average CO2 concentration in parts per million per volume
on January 9 2000 morning |
float | dimensionless |
A1_16_00 | Average CO2 concentration in parts per million per volume
on January 16 2000 morning |
float | dimensionless |
AVERAGE | Average CO2 concentration in parts per million per volume
for winter morning |
float | dimensionless |
WEEKAVE | Average CO2 concentration in parts per million per volume
for weekday winter morning |
float | dimensionless |
WENDAVE | Average CO2 concentration in parts per million per volume
for weekend winter morning |
float | dimensionless |
Spatial Vector: Atmospheric carbon dioxide afternoon transect data
Description: Afternoon transect data for modelling spatial patterns and determinants of atmospheric carbon dioxide concentrations in Phoenix metro area
Horizontal Coordinate System:WGS_1984_UTM_Zone_12N
Geometry Type: Point
Column | Description | Type | Units |
---|---|---|---|
FID | Internal feature number. |
OID | |
Shape | Feature geometry. |
Geometry | |
CO2PM_ID | CO2PM_ID |
integer | |
TRANSECT1_ | TRANSECT1_ |
Float | |
X_COORD | UTM X coordinate in meters |
Float | |
Y_COORD | UTM Y coordinate in meters |
Float | |
POINT_ | POINT_ |
float | |
AWT_807 | Average Weekly Traffic as Percent distance of road within
each CO2 monitoring site buffer |
Float | dimensionless |
Vegetation | Summation of all NDVI values for all grid points that are
within the 807-meter buffer of each CO2 monitoring
site |
Float | number |
EMP_807 | Employment density is the summation of all employees in all
employment points that fell within the buffer of each CO2 monitoring
site |
Float | number |
POP_807 | Population density Derived by multiplying total population
in the US Census tract by the percent are of the buffer of each CO2
monitoring site |
Float | number |
ADDRESS | ADDRESS |
string | |
A1_3_00 | Average CO2 concentration in parts per million per volume
on January 3 2000 |
float | dimensionless |
A1_10_00 | Average CO2 concentration in parts per million per volume
on January 10 2000 |
float | dimensionless |
A1_4_00 | Average CO2 concentration in parts per million per volume
on January 4 2000 |
float | dimensionless |
A1_11_00 | Average CO2 concentration in parts per million per volume
on January 11 2000 |
float | dimensionless |
A1_5_00 | Average CO2 concentration in parts per million per volume
on January 5 2000 |
float | dimensionless |
A1_12_00 | Average CO2 concentration in parts per million per volume
on January 12 2000 |
float | dimensionless |
A1_6_00 | Average CO2 concentration in parts per million per volume
on January 6 2000 |
float | dimensionless |
A1_13_00 | Average CO2 concentration in parts per million per volume
on January 13 2000 |
float | dimensionless |
A1_7_00 | Average CO2 concentration in parts per million per volume
on January 7 2000 |
float | dimensionless |
A1_14_00 | Average CO2 concentration in parts per million per volume
on January 14 2000 |
float | dimensionless |
A1_8_00 | Average CO2 concentration in parts per million per volume
on January 8 2000 |
float | dimensionless |
A1_15_00 | Average CO2 concentration in parts per million per volume
on January 15 2000 |
float | dimensionless |
A1_9_00 | Average CO2 concentration in parts per million per volume
on January 9 2000 |
float | dimensionless |
A1_16_00 | Average CO2 concentration in parts per million per volume
on January 16 2000 |
float | dimensionless |
AVERAGE | Average CO2 concentration in parts per million per volume
for winter afternoon |
float | dimensionless |
WEEKAVE | Average CO2 concentration in parts per million per volume
for weekday winter afternoon |
float | dimensionless |
WENDAVE | Average CO2 concentration in parts per million per volume
for weekend winter afternoon |
float | dimensionless |
Spatial Vector: Atmospheric carbon dioxide concentrations for spatial patterns and determinants
Description: Spatial Patterns and Determinants of Atmospheric Carbon Dioxide Concentrations in Phoenix metro area
Horizontal Coordinate System:WGS_1984_UTM_Zone_12N
Geometry Type: Polygon
Column | Description | Type | Units |
---|---|---|---|
FID | Internal feature number. |
OID | |
Shape | Feature geometry. |
Geometry | |
AREA | Area of grid cells in square meters |
Float | squareMeter |
PERIMETER | Perimeter of grid cells in square
meters |
Float | meter |
MODEL_CO2_ | MODEL_CO2 grid cell number |
integer | |
MODEL_CO21 | MODEL_CO2 grid cell unique identifier |
integer | |
EMP | Employment density is the summation of all employees in all
employment points that fell within the buffer of each CO2 monitoring
site |
Float | number |
VEG | Summation of all NDVI values for all grid points that are
within the 807-meter buffer of each CO2 monitoring
site |
Float | dimensionless |
POP | Population density Derived by multiplying total population
in the US Census tract by the percent are of the buffer of each CO2
monitoring site |
Float | dimensionless |
AWT | Average Weekly Traffic as Percent distance of road within
each CO2 monitoring site buffer |
Float | dimensionless |
NFACTOR1 | NFACTOR1 |
float | |
NFACTOR2 | NFACTOR2 |
float | |
Morning CO2 | Average CO2 concentration in parts per million per volume
for winter morning |
float | dimensionless |
WDMCO2 | Average CO2 concentration in parts per million per volume
for weekday winter morning |
float | dimensionless |
WEMCO2 | Average CO2 concentration in parts per million per volume
for weekend winter morning |
float | dimensionless |
ACO2 | Average CO2 concentration in parts per million per volume
for winter afternoon |
float | dimensionless |
WDACO2 | Average CO2 concentration in parts per million per volume
for weekday winter afternoon |
float | dimensionless |
WEACO2 | Average CO2 concentration in parts per million per volume
for weekend winter afternoon |
float | dimensionless |
FACTOR1 | Factor 1 (urbanization) loadings from the Principal
Component Analysis of POP, AWT, EMP, and VEG |
float | dimensionless |
FACTOR2 | Factor 2 (vegetation) loadings from the Principal Component
Analysis of POP, AWT, EMP, and VEG |
float | dimensionless |