Andrew A. Turnipseed
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View article: Estimating PM 2.5 in Fort Collins, Colorado Using a Robust Drive-By Calibration of Low-Cost Air Quality Monitors Deployed on School Buses
Estimating PM 2.5 in Fort Collins, Colorado Using a Robust Drive-By Calibration of Low-Cost Air Quality Monitors Deployed on School Buses Open
View article: AmeriFlux FLUXNET-1F US-NR1 Niwot Ridge Forest (LTER NWT1)
AmeriFlux FLUXNET-1F US-NR1 Niwot Ridge Forest (LTER NWT1) Open
This is the AmeriFlux Management Project (AMP) created FLUXNET-1F version of the carbon flux data for the site US-NR1 Niwot Ridge Forest (LTER NWT1). This is the FLUXNET version of the carbon flux data for the site US-NR1 Niwot Ridge Fores…
View article: A portable, low-cost relaxed eddy accumulation (REA) system for quantifying ecosystem-level fluxes of volatile organics
A portable, low-cost relaxed eddy accumulation (REA) system for quantifying ecosystem-level fluxes of volatile organics Open
View article: Portable calibrator for NO based on the photolysis of N <sub>2</sub> O and a combined NO <sub>2</sub> ∕NO∕O <sub>3</sub> source for field calibrations of air pollution monitors
Portable calibrator for NO based on the photolysis of N <sub>2</sub> O and a combined NO <sub>2</sub> ∕NO∕O <sub>3</sub> source for field calibrations of air pollution monitors Open
A highly portable calibration source of nitric oxide (NO) based on the photolysis of nitrous oxide (N2O) supplied by 8 or 16 g disposable cartridges is demonstrated to serve as an accurate and reliable transfer standard for the calibration…
View article: Responses to review by Referee #1
Responses to review by Referee #1 Open
View article: Responses to review by Referee #2
Responses to review by Referee #2 Open
View article: Data, Photographs, Videos, and Information for the Niwot Ridge Subalpine Forest (US-NR1) AmeriFlux site
Data, Photographs, Videos, and Information for the Niwot Ridge Subalpine Forest (US-NR1) AmeriFlux site Open
This data package contains data and information about the operation of the Niwot Ridge Subalpine Forest AmeriFlux site (US-NR1) between Nov 1998 to the present (2020). This data archive supplements the primary 30-min data storage for the U…
View article: Portable Calibrator for NO Based on Photolysis of N <sub>2</sub> O and a Combined NO <sub>2</sub> /NO/O <sub>3</sub> Source for Field Calibrations of Air Pollution Monitors
Portable Calibrator for NO Based on Photolysis of N <sub>2</sub> O and a Combined NO <sub>2</sub> /NO/O <sub>3</sub> Source for Field Calibrations of Air Pollution Monitors Open
A highly portable calibration source of nitric oxide (NO) based on photolysis of nitrous oxide (N2O) supplied by 8- or 16-g disposable cartridges is demonstrated to serve as an accurate and reliable transfer standard for the calibration of…
View article: Global Ozone (GO3) Project and AQTreks: Use of evolving technologies by students and citizen scientists to monitor air pollutants
Global Ozone (GO3) Project and AQTreks: Use of evolving technologies by students and citizen scientists to monitor air pollutants Open
Over the past decade, new and emerging technologies in air pollution instrumentation have made it possible to involve students and citizen scientists in air pollution monitoring. Similarly, advances in data communication and transmission h…
View article: Portable ozone calibration source independent of changes in temperature, pressure and humidity for research and regulatory applications
Portable ozone calibration source independent of changes in temperature, pressure and humidity for research and regulatory applications Open
A highly portable ozone (O3) calibration source that can serve as a U.S. EPA level 4 transfer standard for the calibration of ozone analyzers is described and evaluated with respect to analytical figures of merit and effects of ambient pre…
View article: Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia
Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia Open
Isoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of the seasonal patterns of isoprene fluxes and the ass…
View article: NO<sub>x</sub> instrument intercomparison for laboratory biomass burning source studies and urban ambient measurements in Albuquerque, New Mexico
NO<sub>x</sub> instrument intercomparison for laboratory biomass burning source studies and urban ambient measurements in Albuquerque, New Mexico Open
Understanding nitrogen oxides (NOx = NO + NO2) measurement techniques is important as air-quality standards become more stringent, important sources change, and instrumentation develops. NOx observations ar…
View article: Folded tubular photometer for atmospheric measurements of NO <sub>2</sub> and NO
Folded tubular photometer for atmospheric measurements of NO <sub>2</sub> and NO Open
We describe and characterize a modular folded tubular photometer for making direct measurements of the concentrations of nitrogen dioxide (NO2) and specify how this method could be extended to measure other pollutants such as sulfur dioxid…
View article: Portable Ozone Calibration Source Independent of Changes in Temperature,Pressure and Humidity for Research and Regulatory Applications
Portable Ozone Calibration Source Independent of Changes in Temperature,Pressure and Humidity for Research and Regulatory Applications Open
A highly portable ozone (O3) calibration source that can serve as a U.S. EPA Level 4 transfer standard for the calibration of ozone analyzers is described and evaluated with respect to analytical figures of merit and effects of ambient pre…
View article: Supplementary material to "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia"
Supplementary material to "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia" Open
Supplementary Information for: "Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia" 1. Isoprene flux -Relaxed Eddy Accumulation system 1.1 Source of errors According to Arnts et al. (2013), …
View article: Folded Tubular Photometer for atmospheric measurements of NO <sub>2</sub> and NO
Folded Tubular Photometer for atmospheric measurements of NO <sub>2</sub> and NO Open
We describe and characterize a modular Folded Tubular Photometer for making direct measurements of the concentrations of air pollutants such as nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and black carbon particulate matter. …
View article: Evaluation of ozone deposition models over a subalpine forest in Niwot Ridge, Colorado
Evaluation of ozone deposition models over a subalpine forest in Niwot Ridge, Colorado Open
⎯In this study, we evaluated three conceptually similar ozone gas deposition models.These dry deposition models are frequently used with chemical transport models for calculations over large spatial domains.However, large scale application…
View article: Ethene, propene, butene and isoprene emissions from a ponderosa pine forest measured by relaxed eddy accumulation
Ethene, propene, butene and isoprene emissions from a ponderosa pine forest measured by relaxed eddy accumulation Open
Alkenes are reactive hydrocarbons that influence local and regional atmospheric chemistry by playing important roles in the photochemical production of tropospheric ozone and in the formation of secondary organic aerosols. The simplest alk…
View article: Use of a heated graphite scrubber as a means of reducing interferences in UV-absorbance measurements of atmospheric ozone
Use of a heated graphite scrubber as a means of reducing interferences in UV-absorbance measurements of atmospheric ozone Open
A new solid-phase scrubber for use in conventional ozone (O3) photometers was investigated as a means of reducing interferences from other UV-absorbing species and water vapor. It was found that when heated to 100–130 °C, a tubular graphit…
View article: Ethene, propene, butene and isoprene emissions from a ponderosapine forest measured by Relaxed Eddy Accumulation
Ethene, propene, butene and isoprene emissions from a ponderosapine forest measured by Relaxed Eddy Accumulation Open
Alkenes are reactive hydrocarbons that influence local and regional atmospheric chemistry, playing important roles in the photochemical production of tropospheric ozone and in the formation of secondary organic aerosols. The simplest alken…
View article: Supplementary material to "Ethene, propene, butene and isoprene emissions from a ponderosapine forest measured by Relaxed Eddy Accumulation"
Supplementary material to "Ethene, propene, butene and isoprene emissions from a ponderosapine forest measured by Relaxed Eddy Accumulation" Open
View article: Use of a Heated Graphite Scrubber as a Means of Reducing Interferences in UV-Absorbance Measurements of Atmospheric Ozone
Use of a Heated Graphite Scrubber as a Means of Reducing Interferences in UV-Absorbance Measurements of Atmospheric Ozone Open
A new solid-phase scrubber for use in conventional ozone photometers was investigated as a means of reducing interferences from other UV-absorbing species and water vapor. It was found that when heated to 100–130 °C, a tubular graphite scr…
View article: Arctic springtime observations of volatile organic compounds during the OASIS‐2009 campaign
Arctic springtime observations of volatile organic compounds during the OASIS‐2009 campaign Open
Gas‐phase volatile organic compounds (VOCs) were measured at three vertical levels between 0.6 m and 5.4 m in the Arctic boundary layer in Barrow, Alaska, for the Ocean‐Atmosphere‐Sea Ice‐Snowpack (OASIS)‐2009 field campaign during March–A…
View article: Appendix A. Comparison of horizontal advection calculated by the cosine-referenced technique and consideration of two-dimensional wind flows.
Appendix A. Comparison of horizontal advection calculated by the cosine-referenced technique and consideration of two-dimensional wind flows. Open
Comparison of horizontal advection calculated by the cosine-referenced technique and consideration of two-dimensional wind flows.
View article: AmeriFlux US-NR1 Niwot Ridge Forest (LTER NWT1)
AmeriFlux US-NR1 Niwot Ridge Forest (LTER NWT1) Open
This is the AmeriFlux version of the carbon flux data for the site US-NR1 Niwot Ridge Forest (LTER NWT1). Site Description - The Niwot Ridge AmeriFlux site is located in a subalpine forest ecosystem just below the Continental Divide near N…
View article: The influence of warm-season precipitation on the diel cycle of the surface energy balance and carbon dioxide at a Colorado subalpine forest site
The influence of warm-season precipitation on the diel cycle of the surface energy balance and carbon dioxide at a Colorado subalpine forest site Open
Precipitation changes the physical and biological characteristics of an ecosystem. Using a precipitation-based conditional sampling technique and a 14 year data set from a 25 m micrometeorological tower in a high-elevation subalpine forest…
View article: Contribution from biogenic organic compounds to particle growth during the 2010 BEACHON-ROCS campaign in a Colorado temperate needleleaf forest
Contribution from biogenic organic compounds to particle growth during the 2010 BEACHON-ROCS campaign in a Colorado temperate needleleaf forest Open
New particle formation (NPF) is an important atmospheric phenomenon. During an NPF event, particles first form by nucleation and then grow further in size. The growth step is crucial because it controls the number of particles that can bec…
View article: The effect of warm-season precipitation on the diel cycle of the surface energy balance and carbon dioxide at a Colorado subalpine forest site
The effect of warm-season precipitation on the diel cycle of the surface energy balance and carbon dioxide at a Colorado subalpine forest site Open
Precipitation changes the physical and biological characteristics of an ecosystem. Using a precipitation-based conditional sampling technique and a 14 year dataset from a 25 m micrometeorological tower in a high-elevation subalpine forest,…
View article: Contribution from biogenic organic compounds to particle growth during the 2010 BEACHON-ROCS campaign in a Colorado temperate needle leaf forest
Contribution from biogenic organic compounds to particle growth during the 2010 BEACHON-ROCS campaign in a Colorado temperate needle leaf forest Open
New particle formation (NPF) is an important atmospheric phenomenon. During a NPF event, molecular clusters first form by nucleation and then grow further by condensation of vapors. The growth step is crucial because it controls the number…