Ambient particulate matter organic speciation data from July - August, 2011. This dataset is associated with the following publication: Lynam, M., T. Dvonch, J. Turlington, D. Olson, and M. Landis. Combustion-Related Organic Species in Temporally Resolved Urban Airborne Particulate Matter. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 0(0): 1-33, (2017).

SRM 2585 Organic Contaminants in House Dust - This Standard Reference Material (SRM) is intended for use in evaluating analytical methods for the determination of selected polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyl (PCB) congeners, chlorinated pesticides, and polybrominated diphenyl ether (PBDE) congeners in house dust and similar matrices. All of the constituents for which certified, reference, and information values are provided in SRM 2585 were naturally present in the dust material before processing. A unit of SRM 2585 consists of one bottle containing approximately 10 g of house dust. This data is public in the Certificate of Analysis for this material.

This file has two sheets. Data are measurements by Citizen Science Air Monitors (CSAM) and Federal Monitors, which sampled particulate matter (PM), nitrogen dioxide (NO2), relative humidity (RH), and temperature (T). Variables for each sheet are described in more detail below The sheet “Snorkel No-Snorkel Comparison” includes data from two CSAM units, CSAM-2 and CSAM-3. CSAM-2 used a snorkel tube to sample outdoor air, and CSAM-3 did not use a snorkel tube. CSAM-2 and CSAM-3 were not in the same sampling location, but did sample contemporaneous measurements. These data were used to perform a snorkel and no-snorkel comparison. The sheet “CSAM-1 and Federal Monitor” includes data from a CSAM unit (CSAM-1) and a Federal Monitor (which is used for regulatory measurements of air pollution). CSAM-1 and the Federal Monitor were installed in the same sampling location and recorded contemporaneous measurements. For CSAM-1, original recorded measurements are included, as well as measurements that were corrected (using regression equations) to better reflect the Federal Monitor values. This dataset is associated with the following publication: Barzyk, T., H. Huang, R. Williams, A. Kaufman, and J. Essoka. Advice and Frequently Asked Questions (FAQs) for Citizen-Science Environmental Health Assessments. International Journal of Environmental Research and Public Health. Molecular Diversity Preservation International, Basel, SWITZERLAND, 15(5): 960, (2018).

Emission data from UAV flights. This dataset is associated with the following publication: Zhou, X., J. Aurell, B. Mitchell, D. Tabor, and B. Gullett. A small, lightweight multipollutant sensor system for ground-mobile and aerial emission sampling from open area sources. JOURNAL OF AIR AND WASTE MANAGEMENT. Air & Waste Management Association, Pittsburgh, PA, USA, 154: 31-41, (2017).

Environment and Climate Change Canada collected ambient air samples from three monitoring sites in Alberta’s oil sands region—Mannix (AMS5), Lower Camp (AMS11), and Fort McKay South (AMS13)—between December 2010 and July 2012. These samples were analyzed for polycyclic aromatic compounds (PACs), including polycyclic aromatic hydrocarbons (PAHs), alkylated PAHs, and dibenzothiophenes (DBTs), in both air and precipitation. Using these measurements, a database of scavenging ratios was developed to quantify the removal of PACs by snow and rain. Since dry deposition cannot be measured directly, air concentrations were used to estimate dry deposition amounts. A dry deposition algorithm was also created and applied to various land cover types surrounding the monitoring sites. The resulting dataset includes: 1. Scavenging ratio statistics for 43 PAC species in snow and rain. 2. Statistics of modeled hourly dry deposition velocities for these PACs over different land cover types during 2011. 3. Seasonal and annual estimates of dry and wet deposition for three groups of PACs (PAHs, Alkylated PAHs, and DBTs) at the three sites. These deposition estimates can be integrated with data on other pollutants to assess cumulative environmental impacts on ecosystems and communities within and downwind of the oil sands region.

Maricopa County partnered with EPA Office of Research and Development to evaluate the utility of sensors to capture wood burning episodes. For this study, PM2.5 sensors were collocated at three air quality monitoring stations within this targeted geographic area. Namely, Durango Complex, West Phoenix, and South Phoenix (designated as DC, WP and SP) for a period of 2 years to better understand sensor performance, comparability with regulatory grade monitors, and to explore drift and changes in performance over time. Approximately 6 months later, phase II began a year+ field study using sensors in a distributed network with FRM/FEM monitors to measure PM2.5 to characterize the impact of local air pollution sources—targeting the wintertime heating season in which wood combustion is the principal air pollutant source of interest; other sensors to be deployed during Phase II include black carbon sensors. The Zenodo link provides raw PM2.5 data collected as part of the P-TAQS study from these PurpleAir sensors and reference instruments deployed at fixed sites at 1-minute time resolution ordered by site and date/time. This ScienceHub entry contains the processed data files used to create the Figures in the manuscript titled "Seasonal Effects in the Application of the MOMA Remote Calibration Tool to Outdoor PM2.5 Air Sensors"

We propose to develop a new highly sensitive instrument to confirm the existence of the so-called nano-dust particles, characterize their impact parameters, and measure their chemical composition. Simultaneous theoretical studies will be used to derive the expected  mass and velocity ranges of these putative particles to formulate science and measurement requirements for the future deployment of  the proposed Nano-Dust Analyzer (NDA) 

Early dust instruments onboard Pioneer 8 and 9 and Helios spacecraft detected a flow of submicron sized dust particles coming from the direction of the Sun. These particles originate in the inner solar system from mutual collisions among meteoroids and move on  hyperbolic orbits that leave the Solar System under the prevailing radiation pressure force. Later dust instruments with higher  sensitivity had to avoid looking toward the Sun because of interference from the solar wind and UV radiation and thus contributed  little to the characterization of the dust stream. The one exception is the Ulysses dust detector that observed escaping dust particles  high above the solar poles, which confirm the suspicion that charged nanometer sized dust grains are carried to high heliographic  latitudes by electromagnetic interactions with the Interplanetary Magnetic Field (IMF). Recently, the STEREO WAVES instruments  recorded a large number of intense electric field signals, which were interpreted as impacts from nanometer sized particles striking the  spacecraft with velocities of about the solar wind speed. This high flux and strong spatial and/or temporal variations of nanometer  sized dust grains at low latitude appears to be uncorrelated with the solar wind properties. This is a mystery as it would require that  the total collisional meteoroid debris inside 1 AU is cast in nanometer sized fragments. The observed fluxes of inner-source pickup ions  also point to the existence of a much enhanced dust population in the nanometer size range. 

This new heliospherical phenomenon of nano-dust streams may have consequences throughout the planetary system, but as of yet no dust instrument exists that could be used to shed light on their properties.  We propose to develop a dust analyzer capable to detect and  analyze these mysterious dust particles coming from the solar direction and to embark upon complementary theoretical studies to  understand their characteristics. The instrument is based on the Cassini Dust Analyzer (CDA) that has analyzed the composition of  nanometer sized dust particles emanating from the Jovian and Saturnian systems but could not be pointed towards the Sun. By  applying technologies implemented in solar wind instruments and coronagraphs a highly sensitive dust analyzer will be developed and  tested in the laboratory. The dust analyzer shall be able to characterize impact properties (impact charge and energy distribution of  ions from which mass and speed of the impacting grains may be derived) and chemical composition of individual nanometer sized  particles while exposed to solar wind and UV radiation. The measurements will enable us to identify the source of the dust by  comparing their elemental composition with that of larger micrometeoroid particles of cometary and asteroid origin and will reveal  interaction of nano-dust with the interplanetary medium by investigating the relation of the dust flux with solar wind and IMF  properties. 

Complementary theoretically studies will be performed to understand the characteristics of nano-dust particles at 1 AU to answer the  following questions:  - What is the speed range at which nanometer sized particles impact