Jingqiu Mao
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View article: Reconciling measurements of black carbon in a cold and dark urban environment: Insights from the ALPACA 2022 campaign in Fairbanks, Alaska
Reconciling measurements of black carbon in a cold and dark urban environment: Insights from the ALPACA 2022 campaign in Fairbanks, Alaska Open
View article: Summertime Diurnal Variability of Formaldehyde Over the Contiguous United States: Constraints From Pandonia Global Network
Summertime Diurnal Variability of Formaldehyde Over the Contiguous United States: Constraints From Pandonia Global Network Open
The diurnal cycle of Formaldehyde (HCHO) provide critical insights into tropospheric photochemistry. Here we use tropospheric HCHO retrievals from the Pandonia Global Network (PGN), combined with NASA's GEOS Composition Forecast (GEOS‐CF) …
View article: Complementary aerosol mass spectrometry elucidates sources of wintertime submicron particle pollution in Fairbanks, Alaska, during ALPACA 2022
Complementary aerosol mass spectrometry elucidates sources of wintertime submicron particle pollution in Fairbanks, Alaska, during ALPACA 2022 Open
Fairbanks, Alaska, is a sub-Arctic city that frequently suffers from the non-attainment of national air quality standards in the wintertime due to the coincidence of weak atmospheric dispersion and increased local emissions. As part of the…
View article: Surprisingly robust photochemistry in subarctic particles during winter: evidence from photooxidants
Surprisingly robust photochemistry in subarctic particles during winter: evidence from photooxidants Open
Subarctic cities notoriously experience severe winter pollution episodes with fine particle (PM2.5) concentrations above 35 µg m−3, the US Environmental Protection Agency (EPA) 24 h standard. While winter sources of primary particles in Fa…
View article: Advancing new metrics for wildfire smoke exposure: case study in Alaska to bridge public health, climate adaptation, and fire management
Advancing new metrics for wildfire smoke exposure: case study in Alaska to bridge public health, climate adaptation, and fire management Open
Wildfire activity is increasing globally due to climate change, with implications for air quality and public health. Fine particulate matter (PM 2.5 ) from wildfire smoke contributes to cardiorespiratory morbidity and mortality, adverse bi…
View article: Supplementary material to "Processes driving the regional sensitivities of summertime PM <sub>2.5</sub> to temperature across the US: New insights from model simulations"
Supplementary material to "Processes driving the regional sensitivities of summertime PM <sub>2.5</sub> to temperature across the US: New insights from model simulations" Open
View article: Processes driving the regional sensitivities of summertime PM <sub>2.5</sub> to temperature across the US: New insights from model simulations
Processes driving the regional sensitivities of summertime PM <sub>2.5</sub> to temperature across the US: New insights from model simulations Open
The temperature sensitivity of fine particulate matter (PM2.5) critically influences air quality and human health under a warming climate, yet models struggle to accurately reproduce observed sensitivities. This study improves the represen…
View article: Vertical Stratification of Dust and Anthropogenic Aerosols and Their Seasonal Impact on Radiative Forcing in Semi-Arid Northwest China
Vertical Stratification of Dust and Anthropogenic Aerosols and Their Seasonal Impact on Radiative Forcing in Semi-Arid Northwest China Open
Aerosol optical properties and radiative forcing critically influence Earth’s climate, particularly in semi-arid regions. This study investigates these properties in Yinchuan, Northwest China, focusing on aerosol optical depth (AOD), singl…
View article: Wintertime Abundance and Sources of Key Trace Gas and Particle Species in Fairbanks, Alaska
Wintertime Abundance and Sources of Key Trace Gas and Particle Species in Fairbanks, Alaska Open
View article: Surface distributions and vertical profiles of trace gases (CO, O <sub>3</sub> , NO, NO <sub>2</sub> ) in the Arctic wintertime boundary layer using low-cost sensors during ALPACA-2022
Surface distributions and vertical profiles of trace gases (CO, O <sub>3</sub> , NO, NO <sub>2</sub> ) in the Arctic wintertime boundary layer using low-cost sensors during ALPACA-2022 Open
Electrochemical gas sensors (EGSs) have been used to measure the surface distributions and vertical profiles of trace gases in the wintertime Arctic boundary layer during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) field e…
View article: Surprisingly Robust Photochemistry in Subarctic Particles During Winter: Evidence from Photooxidants
Surprisingly Robust Photochemistry in Subarctic Particles During Winter: Evidence from Photooxidants Open
Subarctic cities notoriously experience severe winter pollution episodes with PM2.5 concentrations above 35 µg m-3, the US EPA’s 24-hour standard. While winter sources of primary particles in Fairbanks, Alaska have been studied, the chemis…
View article: Supplementary material to "Surprisingly Robust Photochemistry in Subarctic Particles During Winter: Evidence from Photooxidants"
Supplementary material to "Surprisingly Robust Photochemistry in Subarctic Particles During Winter: Evidence from Photooxidants" Open
View article: Investigating processes influencing simulation of local Arctic wintertime anthropogenic pollution in Fairbanks, Alaska, during ALPACA-2022
Investigating processes influencing simulation of local Arctic wintertime anthropogenic pollution in Fairbanks, Alaska, during ALPACA-2022 Open
Lagrangian tracer simulations are deployed to investigate processes influencing vertical and horizontal dispersion of anthropogenic pollution in Fairbanks, Alaska, during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) 2022 fi…
View article: A novel dynamic adaptive robust optimization framework for low-NOx and high-yield ethylene cracking furnaces under industrial uncertainty
A novel dynamic adaptive robust optimization framework for low-NOx and high-yield ethylene cracking furnaces under industrial uncertainty Open
View article: Complementary aerosol mass spectrometry elucidates sources of wintertime sub-micron particle pollution in Fairbanks, Alaska, during ALPACA 2022
Complementary aerosol mass spectrometry elucidates sources of wintertime sub-micron particle pollution in Fairbanks, Alaska, during ALPACA 2022 Open
Fairbanks, Alaska, is a subarctic city that frequently suffers from non-attainment of national air quality standards in the wintertime due to the coincidence of weak atmospheric dispersion and increased local emissions. However, significan…
View article: <i>In situ</i> measurements of gas–particle partitioning of organic compounds in Fairbanks
<i>In situ</i> measurements of gas–particle partitioning of organic compounds in Fairbanks Open
Organic compounds were measured in both the gas and particle phases in Fairbanks, Alaska, using a real-time, high-resolution proton transfer reaction-time of flight mass spectrometer (PTR-ToF MS) during a wintertime campaign.
View article: Unraveling Urban NO<sub><i>x</i></sub> Emission Sources in Polluted Arctic Wintertime Using NO<sub>2</sub> Nitrogen Isotopes
Unraveling Urban NO<sub><i>x</i></sub> Emission Sources in Polluted Arctic Wintertime Using NO<sub>2</sub> Nitrogen Isotopes Open
Nitrogen (N) isotopic fractionation during nitrogen oxides (NO x ) cycling and conversion into atmospheric nitrate alters the original N isotopic composition ( δ 15 N) of NO x emissions. Limited quantification of these isotopic effects in …
View article: Enhanced aqueous formation and neutralization of fine atmospheric particles driven by extreme cold
Enhanced aqueous formation and neutralization of fine atmospheric particles driven by extreme cold Open
The prevailing view for aqueous secondary aerosol formation is that it occurs in clouds and fogs, owing to the large liquid water content compared to minute levels in fine particles. Our research indicates that this view may need reevaluat…
View article: Observational Constraints on the Aerosol Optical Depth–Surface PM<sub>2.5</sub> Relationship during Alaskan Wildfire Seasons
Observational Constraints on the Aerosol Optical Depth–Surface PM<sub>2.5</sub> Relationship during Alaskan Wildfire Seasons Open
Wildfire is one of the main sources of PM2.5 (particulate matter with aerodynamic diameter < 2.5 μm) in the Alaskan summer. The complexity in wildfire smokes, as well as limited coverage of ground measurements, poses a big chall…
View article: The Abundance and Sources of Ice Nucleating Particles Within Alaskan Ice Fog
The Abundance and Sources of Ice Nucleating Particles Within Alaskan Ice Fog Open
The Alaskan Layered Pollution and Chemical Analysis (ALPACA) field campaign included deployment of a suite of atmospheric measurements in January–February 2022 with the goal of better understanding atmospheric processes and pollution under…
View article: Vertical profiles and surface distributions of trace gases (CO, O <sub>3</sub> , NO, NO <sub>2</sub> ) in the Arctic wintertime boundary layer using low-cost sensors during ALPACA-2022
Vertical profiles and surface distributions of trace gases (CO, O <sub>3</sub> , NO, NO <sub>2</sub> ) in the Arctic wintertime boundary layer using low-cost sensors during ALPACA-2022 Open
Electrochemical gas sensors (EGSs) have been used to measure the surface distributions and vertical profiles of trace gases in the wintertime Arctic Boundary Layer during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) field e…
View article: Investigating processes influencing simulation of local Arctic wintertime anthropogenic pollution in Fairbanks, Alaska during ALPACA-2022
Investigating processes influencing simulation of local Arctic wintertime anthropogenic pollution in Fairbanks, Alaska during ALPACA-2022 Open
Lagrangian tracer simulations are deployed to investigate processes influencing vertical and horizontal dispersion of anthropogenic pollution in Fairbanks, Alaska, during the ALPACA-2022 field campaign. Simulations of carbon monoxide (CO),…
View article: Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers at northern high latitudes
Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers at northern high latitudes Open
The northern high latitudes (50–90° N, mostly including boreal-forest and tundra ecosystems) have been undergoing rapid climate and ecological changes over recent decades, leading to significant variations in volatile organic compounds (VO…
View article: Hydroxymethanesulfonate and Sulfur(IV) in Fairbanks Winter During the ALPACA Study
Hydroxymethanesulfonate and Sulfur(IV) in Fairbanks Winter During the ALPACA Study Open
Hydroxymethanesulfonate (HMS) in fine aerosol particles has been reported at significant concentrations along with sulfate under extreme cold conditions (-35 癈) in Fairbanks, Alaska, a high latitude city. HMS, a component of S(IV) and an a…
View article: Direct observation of wintertime secondary formation of sulfate in ambient aerosols in Fairbanks, Alaska
Direct observation of wintertime secondary formation of sulfate in ambient aerosols in Fairbanks, Alaska Open
Sulfate comprises an average of 20% of the ambient PM2.5 mass during the winter months in Fairbanks, as indicated by 24-hour average filter measurements. During ALPACA 2022 field campaign (Jan 15th-Feb28th of 2022), we deployed two aerosol…
View article: Global evaluation of HCHO summertime diurnal variability using Pandonia Global Network (PGN)
Global evaluation of HCHO summertime diurnal variability using Pandonia Global Network (PGN) Open
Formaldehyde (HCHO) serves as an important proxy for emissions of volatile organic compounds (VOCs) and their subsequent photochemistry affecting air quality and climate. Understanding HCHO diurnal variability is essential to accurately re…
View article: Overview of the Alaskan Layered Pollution and Chemical Analysis (ALPACA) Field Experiment
Overview of the Alaskan Layered Pollution and Chemical Analysis (ALPACA) Field Experiment Open
The Alaskan Layered Pollution And Chemical Analysis (ALPACA) field experiment was a collaborative study designed to improve understanding of pollution sources and chemical processes during winter (cold climate and low-photochemical activit…
View article: Indoor–Outdoor Oxidative Potential of PM<sub>2.5</sub> in Wintertime Fairbanks, Alaska: Impact of Air Infiltration and Indoor Activities
Indoor–Outdoor Oxidative Potential of PM<sub>2.5</sub> in Wintertime Fairbanks, Alaska: Impact of Air Infiltration and Indoor Activities Open
The indoor air quality of a residential home during winter in Fairbanks, Alaska, was investigated and contrasted with outdoor levels. Twenty-four-hour average indoor and outdoor filter samples were collected from January 17 to February 25,…
View article: Assessing the Oxidative Potential of Outdoor PM<sub>2.5</sub> in Wintertime Fairbanks, Alaska
Assessing the Oxidative Potential of Outdoor PM<sub>2.5</sub> in Wintertime Fairbanks, Alaska Open
The oxidative potential (OP) of outdoor PM2.5 in wintertime Fairbanks, Alaska, is investigated and compared to those in wintertime Atlanta and Los Angeles. Approximately 40 filter samples collected in January-February 2022 at a …
View article: Multi-year, high-time resolution aerosol chemical composition and mass measurements from Fairbanks, Alaska
Multi-year, high-time resolution aerosol chemical composition and mass measurements from Fairbanks, Alaska Open
Fairbanks-North Star Borough, Alaska (FNSB) regularly experiences some of the worst wintertime air quality in the United States.