I. B. Pollack
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View article: Ammonia Observations Over Large North American Cities
Ammonia Observations Over Large North American Cities Open
Ammonia (NH 3 ) contributes to fine particle formation and nitrogen deposition. Observations of NH 3 are limited compared to other major anthropogenic pollutants. Here, we explore the relationships between NH 3 and other urban pollutants u…
View article: Investigating fire-induced ozone production from local to global scales
Investigating fire-induced ozone production from local to global scales Open
Tropospheric ozone (O3) production from wildfires is highly uncertain; previous studies have identified both production and loss of O3 in fire-influenced air masses. To capture the total ozone production attributable to a smoke plume, we b…
View article: Near‐Source Ammonia (NH <sub>3</sub> ) Fluxes and Evolution Observed From Airborne Measurements in Plumes Up To 25 km Downwind From Large Beef Cattle Facilities
Near‐Source Ammonia (NH <sub>3</sub> ) Fluxes and Evolution Observed From Airborne Measurements in Plumes Up To 25 km Downwind From Large Beef Cattle Facilities Open
The Transport and Transformation of Ammonia (TRANS 2 Am) campaign took place in northeastern Colorado in the summers of 2021 and 2022. One of the goals of TRANS 2 Am was to study the evolution of ammonia (NH 3 ) in plumes from large animal…
View article: Observational ozone datasets over the global oceans and polar regions (version 2024)
Observational ozone datasets over the global oceans and polar regions (version 2024) Open
Studying tropospheric ozone over the remote areas of the planet, such as the open oceans and the polar regions, is crucial to understand the role of ozone as a global climate forcer and regulator of atmospheric oxidative capacity. A focus …
View article: Ozone Production Efficiencies in the Three Largest United States Cities from Airborne Measurements
Ozone Production Efficiencies in the Three Largest United States Cities from Airborne Measurements Open
Despite ongoing reductions in emissions of ozone (O3) precursors, nitrogen oxides (NOx = NO + NO2) and volatile organic compounds (VOCs), the three largest urban areas in the United States ─ New York City (NYC), Chicago, and Los Angeles (L…
View article: Investigating fire-induced ozone production from local to global scales
Investigating fire-induced ozone production from local to global scales Open
Tropospheric ozone (O3) production from wildfires is highly uncertain; previous studies have identified both production and loss of O3 in fire-influenced air masses. To capture the total ozone production attributable to a smoke plume, we b…
View article: Observational ozone data over the global oceans and polar regions: The TOAR-II Oceans data set version 2024
Observational ozone data over the global oceans and polar regions: The TOAR-II Oceans data set version 2024 Open
Studying tropospheric ozone over the remote areas of the planet, such as the open oceans and the polar regions, is crucial to understand the role of ozone as a global climate forcer and regulator of atmospheric oxidative capacity. A focus …
View article: Anatomy of Summertime Upslope Events in Northeastern Colorado: Ammonia (NH<sub>3</sub>) Transport to the Rocky Mountains
Anatomy of Summertime Upslope Events in Northeastern Colorado: Ammonia (NH<sub>3</sub>) Transport to the Rocky Mountains Open
The Transport and Transformation of Ammonia (TRANS2Am) airborne field campaign occurred over northeastern Colorado during the summers of 2021 and 2022. A subset of the TRANS2Am flights investigated easterly wind conditions capable of movin…
View article: Impact of Heatwaves and Declining NO<sub>x</sub> on Nocturnal Monoterpene Oxidation in the Urban Southeastern United States
Impact of Heatwaves and Declining NO<sub>x</sub> on Nocturnal Monoterpene Oxidation in the Urban Southeastern United States Open
Nighttime oxidation of monoterpenes (MT) via the nitrate radical (NO 3 ) and ozone (O 3 ) contributes to the formation of secondary organic aerosol (SOA). This study uses observations in Atlanta, Georgia from 2011 to 2022 to quantify trend…
View article: Summertime Ozone Production at Carlsbad Caverns National Park, New Mexico: Influence of Oil and Natural Gas Development
Summertime Ozone Production at Carlsbad Caverns National Park, New Mexico: Influence of Oil and Natural Gas Development Open
Southeastern New Mexico's Carlsbad Caverns National Park (CAVE) has increasingly experienced summertime ozone (O 3 ) exceeding an 8‐hr average of 70 parts per billion by volume (ppbv). The park is located in the western part of the Permian…
View article: Inorganic Nitrogen Gas‐Aerosol Partitioning in and Around Animal Feeding Operations in Northeastern Colorado in Late Summer 2021
Inorganic Nitrogen Gas‐Aerosol Partitioning in and Around Animal Feeding Operations in Northeastern Colorado in Late Summer 2021 Open
Ammonia (NH 3 ) from animal feeding operations (AFOs) is an important source of reactive nitrogen in the US, but despite its ramifications for air quality and ecosystem health, its near‐source evolution remains understudied. To this end, P…
View article: Lightning NO<sub><i>x</i></sub> in the 29–30 May 2012 Deep Convective Clouds and Chemistry (DC3) Severe Storm and Its Downwind Chemical Consequences
Lightning NO<sub><i>x</i></sub> in the 29–30 May 2012 Deep Convective Clouds and Chemistry (DC3) Severe Storm and Its Downwind Chemical Consequences Open
A cloud‐resolved storm and chemistry simulation of a severe convective system in Oklahoma constrained by anvil aircraft observations of NO x was used to estimate the mean production of NO x per flash in this storm. An upward ice flux schem…
View article: Summertime Airborne Measurements of Ammonia Emissions From Cattle Feedlots and Dairies in Northeastern Colorado
Summertime Airborne Measurements of Ammonia Emissions From Cattle Feedlots and Dairies in Northeastern Colorado Open
Phase One of the Transportation and Transformation of Ammonia (TRANS 2 Am) field campaign took place in northeastern Colorado during the summer of 2021. One of the goals of TRANS 2 Am was to measure ammonia (NH 3 ) emissions from cattle fe…
View article: Source characterization of volatile organic compounds at Carlsbad Caverns National Park
Source characterization of volatile organic compounds at Carlsbad Caverns National Park Open
Carlsbad Caverns National Park (CAVE), located in southeastern New Mexico, experiences elevated ground-level ozone (O3) exceeding the National Ambient Air Quality Standard (NAAQS) of 70 ppbv. It is situated adjacent to the Permian Basin, o…
View article: Observations of ozone, acyl peroxy nitrates, and their precursors during summer 2019 at Carlsbad Caverns National Park, New Mexico
Observations of ozone, acyl peroxy nitrates, and their precursors during summer 2019 at Carlsbad Caverns National Park, New Mexico Open
Carlsbad Caverns National Park (CAVE) is located in southeastern New Mexico and is adjacent to the Permian Basin, one of the most productive oil and natural gas (O&G;) production regions in the United States. Since 2018, ozone (O3) at CAVE…
View article: Source characterization of volatile organic compounds at Carlsbad Caverns National Park
Source characterization of volatile organic compounds at Carlsbad Caverns National Park Open
Carlsbad Caverns National Park (CAVE), located in southeastern New Mexico, experiences elevated ground-level ozone (O3) exceeding the National Ambient Air Quality Standard (NAAQS) of 70 ppbv. It is situated adjacent to the Permian Basin, o…
View article: Observations of ozone, acyl peroxy nitrates, and their precursors during summer 2019 at Carlsbad Caverns National Park, New Mexico
Observations of ozone, acyl peroxy nitrates, and their precursors during summer 2019 at Carlsbad Caverns National Park, New Mexico Open
Carlsbad Caverns National Park (CAVE) is located in southeastern New Mexico and is adjacent to the Permian Basin, one of the most productive oil and natural gas (O&G;) production regions in the United States. Since 2018, ozone (O3) at CAVE…
View article: Webs of science: mentor networks influence women's integration into <scp>STEM</scp> fields
Webs of science: mentor networks influence women's integration into <span>STEM</span> fields Open
Mentorship can be part of the solution to developing a more diverse global scientific workforce, but robust longitudinal evidence is limited. Developmental mentor network theory can advance our understanding of the impact of a wide range o…
View article: Technical note: Isolating methane emissions from animal feeding operations in an interfering location
Technical note: Isolating methane emissions from animal feeding operations in an interfering location Open
Agricultural emissions, including those from concentrated animal feeding operations (CAFOs) for beef and dairy cattle, make up a large portion of the United States' total greenhouse gas (GHG) emissions. However, many CAFOs reside in areas …
View article: Promoting sense of belonging and interest in the geosciences among undergraduate women through mentoring
Promoting sense of belonging and interest in the geosciences among undergraduate women through mentoring Open
Efforts to diversify STEM fields have not completely eliminated higher rates of women leaving certain science, technology, engineering, and mathematics (STEM) disciplines, such as geosciences. A diverse mentorship network is linked to pers…
View article: Webs of Science: Mentor Networks Influence Women’s Integration into STEM Fields
Webs of Science: Mentor Networks Influence Women’s Integration into STEM Fields Open
Mentorship can be part of the solution to developing a more diverse global scientific workforce, but robust longitudinal evidence is limited. Developmental mentor network theory can advance our understanding of the impact of a wide range o…
View article: Nitrogen oxides in the free troposphere: implications for tropospheric oxidants and the interpretation of satellite NO <sub>2</sub> measurements
Nitrogen oxides in the free troposphere: implications for tropospheric oxidants and the interpretation of satellite NO <sub>2</sub> measurements Open
Satellite-based retrievals of tropospheric NO2 columns are widely used to infer NOx (≡ NO + NO2) emissions. These retrievals rely on model information for the vertical distribution of NO2. The free tropospheric background above 2 km is par…
View article: Comment on egusphere-2022-968
Comment on egusphere-2022-968 Open
Abstract. Agriculture emissions, including those from cattle and dairy concentrated animal feeding operations (CAFOs), make up a large portion of the United States’ total greenhouse gas emissions. However, many CAFOs reside in areas where …
View article: Supplementary material to "Technical note: Isolating methane emissions from animal feeding operations in an interfering location"
Supplementary material to "Technical note: Isolating methane emissions from animal feeding operations in an interfering location" Open
Figure S1.Descending spiral transect (left) followed by an ascending spiral (right) transect to show the MLB during flight 2 (F2) conducted on November 13, 2019.Potential temperature (θ, red) and water vapor (H2O, blue) were used to determ…
View article: Technical note: Isolating methane emissions from animal feeding operations in an interfering location
Technical note: Isolating methane emissions from animal feeding operations in an interfering location Open
Agriculture emissions, including those from cattle and dairy concentrated animal feeding operations (CAFOs), make up a large portion of the United States’ total greenhouse gas emissions. However, many CAFOs reside in areas where methane (C…
View article: Comment on egusphere-2022-656
Comment on egusphere-2022-656 Open
Satellite-based retrievals of tropospheric NO2 columns are used to infer NOx (NO+NO2) emissions at the surface. These retrievals rely on model information for the vertical distribution of NO2. The free tropospheric background above 2 km is…
View article: Comment on egusphere-2022-656
Comment on egusphere-2022-656 Open
Abstract. Satellite-based retrievals of tropospheric NO2 columns are used to infer NOx (NO+NO2) emissions at the surface. These retrievals rely on model information for the vertical distribution of NO2. The free tropospheric background abo…