Index of /arm-iop-file/2022/hou/tracer-map/collins-merged

[ICO]NameLast modifiedSizeDescription
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[TXT]ARM0885.Distributions.20240809_14_08_806.txt2024-08-16 14:52 6.6M 
[TXT]ARM0885.Times_epoch.20240809_14_08_836.txt2024-08-16 14:52 60K 
[TXT]ARM0885.Diameters.20240809_14_08_800.txt2024-08-16 14:52 1.3K 

Particle size distributions from TRACER-MAP

Overview:

Particle size distributions measured using a custom scanning mobility analyzer (SMPS) and a TSI, Inc. aerodynamic particle sizer (APS).  The size distributions measured with the two instruments were merged during data inversion to produce a single distribution spanning a diameter range from approximately 19 nanometers to 15 micrometers.  Size-dependent cloud condensation nuclei (CCN) activity measured with a CCN counter operated in parallel to the condensation particle counter in the SMPS are reported separately.  The measurements were made from the Baylor University/University of Houston Mobile Air Quality Laboratory (MAQL) between July 5 and August 30, 2022 during the TRACER-MAP project.  The trailer moved between five sites in the Houston regions as follows:

Aldine:  7/5-7/8, 7/21-7/26, 8/15-8/24

University of Houston: 7/8-7/16, 8/8-8/15

San Jacinto monument: 7/16-7/21

Jones State Forest: 7/26-8/1; 8/24-8/30

AMF site in La Porte:  8/1-8/8

Metadata Creator:
Name: Don Collins
Email: donc@ucr.edu Phone: (951) 827-8536
Street: 1084 Columbia Ave City: Riverside
State: CA Postal: 92507
Contact Info:
Name: Don Collins
Email: donc@ucr.edu Phone: (951) 827-8536
Street: 1084 Columbia Ave City: Riverside
State: CA Postal: 92507
Investigator(s): Don Collins (donc@ucr.edu) 0000-0002-0010-290X
Zihan Zhu (zihan.zhu@email.ucr.edu)
Data Citation:https://doi.org/10.5439/2429678
Data Format:ascii
Abstract:

Particle size distributions measured using a custom scanning mobility analyzer (SMPS) and a TSI, Inc. aerodynamic particle sizer (APS).  The size distributions measured with the two instruments were merged during data inversion to produce a single distribution spanning a diameter range from approximately 19 nanometers to 15 micrometers.  Size-dependent cloud condensation nuclei (CCN) activity measured with a CCN counter operated in parallel to the condensation particle counter in the SMPS are reported separately.  The measurements were made from the Baylor University/University of Houston Mobile Air Quality Laboratory (MAQL) between July 5 and August 30, 2022 during the TRACER-MAP project.  The trailer moved between five sites in the Houston regions as follows:

Aldine:  7/5-7/8, 7/21-7/26, 8/15-8/24

University of Houston: 7/8-7/16, 8/8-8/15

San Jacinto monument: 7/16-7/21

Jones State Forest: 7/26-8/1; 8/24-8/30

AMF site in La Porte:  8/1-8/8
Purpose:

The measurements were made as part of the TRACER-MAP project led by Rebecca Sheesley of Baylor University.  TRACER-MAP was designed to complement the DOE TRACER campaign by increasing the spatial coverage of aerosol and trace gas measurements across the Houston metropolitan area, characterizing a greater diversity of source mixtures (e.g. industrial, traffic, residential and biogenic), and capturing air masses with differential aging of urban source emissions (e.g. downtown vs downwind).  The size distributions provided here were one of several aerosol datasets collected during TRACER-MAP.
Data Usage:The particle size distributions have 143 logarithmically-spaced size bins centered at 0.0190 to 15.2 micrometers. The bin diameter array in micrometers is provided in the file Diameters.txt. Size distributions were measured approximately every 10 minutes. The midpoint time of the measurements is reported in Epoch (UTC) time in the Times_epoch.txt. The particle size distributions are in dN/dlogDp (cm^-3) and saved in the file Distributions.txt. Each column corresponds to a diameter bin and each row corresponds to a measurement time.
Arm Sites: hou
Content Time Range: Begin: 2022-07-05 End: 2022-08-30
Instrument(s):Merged Cloud Particle Size Distribution
Data Type:TRACER-MAP: Mapping Aerosol across Houston
Scientific Measurements(s):
Measurement nameVariables
Particle size distribution
Stratum Keyword(s):
Troposphere
Data Quality:
Attribute Accuracy: No formal uncertainty assessments were conducted and no estimates of uncertainty are reported.
Positional Accuracy: No formal positional accuracy tests were conducted
Consistency and Completeness Report: Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Use Restrictions: No use constraints are associated with this data.
Distribution Info:
Organization Name: ARM Archive User Services
Email: armarchive[at]ornl.gov Phone: 1-888-ARM-DATA
Street: Oak Ridge National Laboratory City: Oak Ridge
State: Tennessee Postal: 37831-6290