Explanipedia

Towards a Global Ground-Based Earth Observatory (GGBEO): Leveraging existing systems and networks Open

Hanna K. Lappalainen, Christos Arvanitidis, Natacha B. Bernier, Dominique Bérod, Thomas G. Bornman , et al. · 2025

To tackle the planetary environmental and climate crisis and meet the United Nations’ Sustainable Development Goals (SDGs), we must fully leverage the potential of Earth observations (EO). This involves integrating globally sourced data on…

Future Collaboration between the United States and Japan for Possible Development of a Japan GHG Center Open

Hiroshi Tanimoto, Toshinobu Machida, Tomoko Shirai, Yosuke Niwa, Tsuneo Matsunaga , et al. · 2024

To achieve carbon neutrality by 2050, national efforts to reduce greenhouse gas (GHG) emissions must accelerate. The United States has committed to reducing GHG emissions by 50% by 2030 (relative to 2005 levels) and achieving net-zero emis…

Validation and support of space-based measurements with the Pandonia Global Network of ground-based spectrometers Open

T. F. Hanisco, Nader Abuhassan, Stefano Casadio, Alexander Cede, Lim‐Seok Chang , et al. · 2024

Since 2019 the NASA Pandora and ESA Pandonia projects have been collaborating to coordinate and facilitate the expansion of a global network of ground-based spectrometers to support space-based measurements of trace gases relevant to air q…

Investigating expanding air pollution and climate change on the African continent Open

P. F. Levelt, Eloïse A. Marais, H. M. Worden, Wenfu Tang, S. Martínez‐Alonso , et al. · 2024

In the next few decades a large increase in population is expected to occur on the African continent, leading to a doubling of the current population, which will reach 2.5 billion by 2050. At the same time, Africa is experiencing substanti…

Fire Influence on Regional to Global Environments and Air Quality (FIREX‐AQ) Open

C. Warneke, Joshua P. Schwarz, Jack E. Dibb, О. В. Калашникова, G. J. Frost , et al. · 2022

The NOAA/NASA Fire Influence on Regional to Global Environments and Air Quality (FIREX‐AQ) experiment was a multi‐agency, inter‐disciplinary research effort to: (a) obtain detailed measurements of trace gas and aerosol emissions from wildf…

NASA’s New Wildland Fire Earth Observation Science & Applications Programmatic Developments Open

Vincent G. Ambrosia, David Green, Michael J. Falkowski, B. L. Lefer, Michael Seablom , et al. · 2022

In 2021, the U.S. National Aeronautics & Space Administration (NASA) initiated new programmatic elements within the Science Mission Directorate (SMD) and the Aeronautics Research Mission Directorate (ARMD) focused on supporting wildland fi…

High-Flying Interns: NASA’s Student Airborne Research Program (SARP) Open

E. L. Schaller, J. Ryan Bennett, D. R. Blake, Raphael M. Kudela, B. L. Lefer , et al. · 2022

NASA’s Student Airborne Research Program (SARP) has completed 13 years of airborne student research since its inception in 2009. The 8-week summer internship program provides students, typically rising undergraduate seniors, with an opport…

Measurements of Total OH Reactivity During CalNex‐LA Open

R. F. Hansen, Stephen M. Griffith, Sébastien Dusanter, J. B. Gilman, M. Graus , et al. · 2021

Total OH reactivity was measured during the California Research at the Nexus of Air Quality and Climate Change field campaign at the Pasadena ground site using a turbulent flow tube reactor with laser‐induced fluorescence detection of the …

New and improved data from the Pandonia Global Network for satellite validation Open

Alexander Cede, Martin Tiefengraber, Manuel Gebetsberger, Michel Van Roozendaël, Henk Eskes , et al. · 2021

The worldwide operating Pandonia Global Network (PGN) is measuring atmospheric trace gases at high temporal resolution with the purpose of air quality monitoring and satellite validation. It is an activity carried out jointly by N…

The Korea–United States Air Quality (KORUS-AQ) field study Open

J. H. Crawford, Joonyoung Ahn, J. A. Al‐Saadi, Lim‐Seok Chang, L. K. Emmons , et al. · 2021

The Korea–United States Air Quality (KORUS-AQ) field study was conducted during May–June 2016. The effort was jointly sponsored by the National Institute of Environmental Research of South Korea and the National Aeronautics and Space Admin…

Identifying the Transcriptional Response of Cancer and Inflammation-Related Genes in Lung Cells in Relation to Ambient Air Chemical Mixtures in Houston, Texas Open

Lauren A. Eaves, Hang Thi Thu Nguyen, Julia E. Rager, Kenneth G. Sexton, Thomas P. Howard , et al. · 2020

Atmospheric pollution represents a complex mixture of air chemicals that continually interact and transform, making it difficult to accurately evaluate associated toxicity responses representative of real-world exposure. This study leverag…

Apportioned primary and secondary organic aerosol during pollution events of DISCOVER-AQ Houston Open

Subin Yoon, S. M. Ortiz, Adelaide E. Clark, T. E. Barrett, Sascha Usenko , et al. · 2020

An Automated Common Algorithm for Planetary Boundary Layer Retrievals Using Aerosol Lidars in Support of the U.S. EPA Photochemical Assessment Monitoring Stations Program Open

Vanessa Caicedo, Rubén Delgado, Ricardo K. Sakai, Travis N. Knepp, David J. Williams , et al. · 2020

A unique automated planetary boundary layer (PBL) retrieval algorithm is proposed as a common cross-platform method for use with commercially available ceilometers for implementation under the redesigned U.S. Environmental Protection Agenc…

Space-Borne Monitoring of NOx Emissions from Cement Kilns in South Korea Open

Hyun Cheol Kim, Changhan Bae, Minah Bae, Okgil Kim, Byeong-Uk Kim , et al. · 2020

Nitrogen oxide (NOx) emissions from the South Korean cement industry are investigated with remote-sensing measurements, surface observations, and in situ aircraft measurements. In the Yeongwol, Danyang, and Jecheon regions of central South…

Operational satellite validation with data from the Pandonia Global Network (PGN) Open

Alexander Cede, Martin Tiefengraber, Angelika Dehn, B. L. Lefer, Jonas von Bismarck , et al. · 2020

The Pandonia Global Network (PGN) is a worldwide operating network of passive remote sensing spectrometer systems named “Pandora”. PGN is measuring atmospheric trace gases at high temporal resolution with the p…

Simulating the weekly cycle of NO x -VOC-HO x -O 3 photochemical system in the South Coast of California during CalNex-2010 Campaign Open

Chenxia Cai, J. Avise, A. P. Kaduwela, J. DaMassa, C. Warneke , et al. · 2019

TEMPO Green Paper: Chemistry, physics, and meteorology experiments with the Tropospheric Emissions: monitoring of pollution instrument Open

K. Chance, Xiong Liu, Christopher Chan Miller, Gonzalo González Abad, Guanyu Huang , et al. · 2019

The NASA/Smithsonian Tropospheric Emissions: Monitoring of Pollution (TEMPO; tempo.si.edu) satellite instrument will measure atmospheric pollution and much more over Greater North America at high temporal resolution (hourly or better in da…

Seasonal differences in formation processes of oxidized organic aerosol near Houston, TX Open

Qili Dai, Benjamin C. Schulze, Xiaohui Bi, Alexander A. T. Bui, Fangzhou Guo , et al. · 2019

Submicron aerosol was measured to the southwest of Houston, Texas, during winter and summer 2014 to investigate its seasonal variability. Data from a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) indicated that orga…

Simulating the Weekly Cycle of NOx‐VOC‐HOx‐O3 Photochemical System in the South Coast of California During CalNex‐2010 Campaign Open

Chenxia Cai, J. Avise, A. P. Kaduwela, J. DaMassa, C. Warneke , et al. · 2019

United States Environmental Protection Agency guidance on the use of photochemical models for assessing the efficacy of an emissions control strategy for ozone requires that modeling be used in a relative sense. Consequently, testing a mod…

Meteorology influencing springtime air quality, pollution transport, and visibility in Korea Open

David A. Peterson, E. J. Hyer, Sang‐Ok Han, J. H. Crawford, Rokjin J. Park , et al. · 2019

In an environment with many local, remote, persistent, and episodic sources of pollution, meteorology is the primary factor that drives periods of unhealthy air quality and reduced visibility. The 2016 Korea-United States Air Quality (KORU…

Seasonal differences in formation processes of oxidized organic aerosol near Houston, TX Open

Qili Dai, Benjamin C. Schulze, Xiaohui Bi, Alexander A. T. Bui, Fangzhou Guo , et al. · 2018

Submicron aerosol was measured to the southwest of Houston, Texas during winter and summer 2014 to investigate its seasonal variability. Data from a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) indicated that organ…

Supplementary material to "Seasonal differences in formation processes of oxidized organic aerosol near Houston, TX" Open

Qili Dai, Benjamin C. Schulze, Xiaohui Bi, Alexander A. T. Bui, Fangzhou Guo , et al. · 2018

Impact of Biomass Burning Plumes on Photolysis Rates and Ozone Formation at the Mount Bachelor Observatory Open

P. Baylon, Daniel A. Jaffe, Samuel R. Hall, Kirk Ullmann, M. J. Alvarado , et al. · 2018

In this paper, we examine biomass burning (BB) events at the Mt. Bachelor Observatory (MBO) during the summer of 2015. We explored the photochemical environment in these BB plumes, which remains poorly understood. Because we are interested…

Chemistry of Volatile Organic Compounds in the Los Angeles Basin: Formation of Oxygenated Compounds and Determination of Emission Ratios Open

J. A. de Gouw, J. B. Gilman, Si‐Wan Kim, Sergio Alvarez, Sébastien Dusanter , et al. · 2018

We analyze an expanded data set of oxygenated volatile organic compounds (OVOCs) in air measured by several instruments at a surface site in Pasadena near Los Angeles during the National Oceanic and Atmospheric Administration California Ne…

Climate change accelerates growth of urban trees in metropolises worldwide Open

Hans Pretzsch, Peter Biber, Enno Uhl, Jens Dahlhausen, Gerhard Schütze , et al. · 2017

Chemistry of Volatile Organic Compounds in the Los Angeles basin: Nighttime Removal of Alkenes and Determination of Emission Ratios Open

J. A. de Gouw, J. B. Gilman, Si‐Wan Kim, B. M. Lerner, Gabriel Isaacman‐VanWertz , et al. · 2017

We reanalyze a data set of hydrocarbons in ambient air obtained by gas chromatography‐mass spectrometry at a surface site in Pasadena in the Los Angeles basin during the NOAA California Nexus study in 2010. The number of hydrocarbon compou…

Comparison of aerosol lidar retrieval methods for boundary layer height detection using ceilometer aerosol backscatter data Open

Vanessa Caicedo, Bernhard Rappenglück, B. L. Lefer, Gary A. Morris, Daniel Toledo , et al. · 2017

Three algorithms for estimating the boundary layer heights are assessed: an aerosol gradient method, a cluster analysis method, and a Haar wavelet method. Over 40 daytime clear-sky radiosonde profiles are used to compare aerosol backscatte…

Ozone production by corona discharges during a convective event in DISCOVER-AQ Houston Open

Alexander Kotsakis, Gary A. Morris, B. L. Lefer, Wonbae Jeon, Anirban Roy , et al. · 2017

Differences in BVOC oxidation and SOA formation above and below the forest canopy Open

Benjamin C. Schulze, H. W. Wallace, James Flynn, B. L. Lefer, Matt H. Erickson , et al. · 2017

Gas-phase biogenic volatile organic compounds (BVOCs) are oxidized in the troposphere to produce secondary pollutants such as ozone (O3), organic nitrates (RONO2), and secondary organic aerosol (SOA). Two coupled zero-dimensional models ha…

Effects of Climate and the Urban Heat Island Effect on Urban Tree Growth in Houston Open

Astrid Moser-Reischl, Enno Uhl, Thomas Rötzer, Peter Biber, Jens Dahlhausen , et al. · 2017

The growing conditions of urban trees differ substantially from forest sites and are mainly characterized by small planting pits with less water, nutrient and aeration availability, high temperatures and radiation inputs as well as polluti…

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