This README.txt file was generated on 20181116 by Albert Presto


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GENERAL INFORMATION
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1. Title of Dataset:


Central site AMS data (2016-2017) collected as part of Center for Air, Climate, and Energy Solutions (CACES)



2. Author Information

  Corresponding Author Contact Information
        Name: Albert Presto
           Institution: Carnegie Mellon University
           Address: 5000 Forbes Ave, Pittsburgh, PA 15213
           Email: apresto@andrew.cmu.edu

	Author Contact Information
        Name:Peishi Gu
           Email: peishigu@gmail.com



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DATA & FILE OVERVIEW
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Directory of Files
   A. Filename: Pittsburgh_AMS_Stationary_2016_2017.xlsx    
      This file contains mobile AMS data collected in Pittsburgh in 2016-2017. It is identical to the dataset used in Gu et al (ES&T, 2018, DOI: 10.1021/acs.est.8b03833). Data are reported for total PM mass, PM components, and organic aerosol components determined from positive matrix factorization (PMF). The file also contains data for concurrent measurements of particulate black carbon (BC), and gaseous pollutants (CO, CO2, NO, NO2, NOx).  


        
   B. Filename: README_AMS_Mobile.txt       
      Short description: ReadMe file

     
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DATA DESCRIPTION FOR: Pittsburgh_AMS_Stationary_2016_2017.xlsx  
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<create sections for each dataset included>


1. Number of variables: 22


2. Number of cases/rows: 92898
       

3. Missing data codes:
   NaN (blank cell) -- missing data


4. Variable List

    A. Name: datetime
       Description: Column A. Timestamp of AMS data.

	B. Name: Year
	Description: Column B. Sample year.

	C. Name: Month
	Description: Column C. Sample month.

	D. Name: Date
	Description: Column D. Sample day of month.

	E. Name: Hour
	Description: Column E. Sample hour.

	F. Name: run_index
	Description: Column F. Global index of sample numbers logged by the instrument.

	G. Name: BC
	Description: Column G. BC concentration in nano-g/m^3. 

	H. Name: corr_fact
	Description: Column H. Temporal correction factor.

	I. Name: Total
	Description: Column I. Total PM1 in micro-g/m^3.

	J. Name: Org
	Description: Column J. Organic PM1 in micro-g/m^3.

	K. Name: NO3
	Description: Column K. Particulate NO3 concentration measured in micro-g/m^3.

	L. Name: SO4
	Description: Column L. Particulate SO4 concentration measured in micro-g/m^3.

	M. Name: NH4
	Description:  Column M. Particulate NH4 concentration measured in micro-g/m^3.

	N. Name: Chl
	Description: Column N. Particulate Chl concentration measured in micro-g/m^3.

	O. Name: Ratio_O_C
	Description: Column O. Molar oxygen:carbon ratio for organic aerosol.

	P. Name: Ratio_H_C
	Description: Column P. Molar hydrogen:carbon ratio for organic aerosol.
	
	Q. Name: Ratio_OM_OC
	Description: Column Q. Ratio of organic mass to organic carbon.

	R. Name: MOOOA
	Description: Column R. Concentration of MOOOA (more oxidized oxidized organic aerosol) from PMF analysis. Units: microgram/m^3.

	S. Name: LOOOA
	Description: Column S. Concentration of LOOOA (more oxidized oxidized organic aerosol) from PMF analysis. Units: microgram/m^3.

	T. Name: COA
	Description: Column T. Concentration of COA (cooking organic aerosol) from PMF analysis. Units: microgram/m^3.

	U. Name: HOA
	Description: Column U. Concentration of HOA (hydrocarbon-like organic aerosol) from PMF analysis. Units: microgram/m^3.

	V. Name: BBOA
	Description: Column V. Concentration of BBOA (biomass burning organic aerosol) from PMF analysis. Units: microgram/m^3.

	
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METHODOLOGICAL INFORMATION FOR: Pittsburgh_AMS_Stationary_2016_2017.xlsx 
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1. Software-specific information:
Name: SQUIRREL
Version: 1.61
Source Repository URL: http://cires1.colorado.edu/jimenez-group/ToFAMSResources/ToFSoftware/#Analysis2

Name: PIKA
Version: 1.21F
Source Repository URL: http://cires1.colorado.edu/jimenez-group/ToFAMSResources/ToFSoftware/#Analysis2

Name: AMS PMF tool
Version: 3.04 A
Source Repository URL: http://cires1.colorado.edu/jimenez-group/wiki/index.php/PMF-AMS_Analysis_Guide#PMF_Evaluation_Tool_Software
Application notes: The PMF factors are based on the 5 factor solution with fpeak=-0.4. Sensitivity analysis of the PMF factorization is found in the supporting information of Gu et al (2018, DOI: 10.1021/acs.est.8b03833).



#
# Equipment: If specialized equipment generated your data,
# please provide for each (if applicable): equipment name,
# manufacturer, model, and calibration information. Be sure
# to include specialized file format information in the data
# dictionary.
#

2. Equipment-specific information:

See Methods section of Gu et al (2018, DOI: 10.1021/acs.est.8b03833).

Collection efficiency applied in this dataset is 0.5 with no exception. All data presented are adjusted by CE.

PMF results are based on three separate PMF model runs, due to the memory managing issue PMF has when the dataset is oversized. 
Run 1 (08/2016-10/2016)
Run 2 (11/2016-12/2016)
Run 3 (01/2017-02/2017)
Biomass burning is only resolved in Run 3


3. Date of data collection (single date, range, approximate date) <suggested format YYYYMMDD>: 20160811 - 20170214