S. E. Strahan
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View article: Antarctica and the Southern Ocean
Antarctica and the Southern Ocean Open
© 2023 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). Corresponding author: Kyle R. Clem / kyle.clem…
View article: Faster Tropical Upper Stratospheric Upwelling Drives Changes in Ozone Chemistry
Faster Tropical Upper Stratospheric Upwelling Drives Changes in Ozone Chemistry Open
Tropospheric trends in long‐lived source gases N 2 O and the chlorofluorocarbons cause trends in O 3 through changes in their reactive product gases. Transport affects the product gases because it controls the distribution of the long‐live…
View article: Antarctica and the Southern Ocean
Antarctica and the Southern Ocean Open
National Centers for Environmental Information, State of the Climate in 2021 is based on contributions
View article: Unexpected Repartitioning of Stratospheric Inorganic Chlorine After the 2020 Australian Wildfires
Unexpected Repartitioning of Stratospheric Inorganic Chlorine After the 2020 Australian Wildfires Open
The inorganic chlorine (Cl y ) and odd nitrogen (NO y ) chemical families influence stratospheric O 3 . In January 2020 Australian wildfires injected record‐breaking amounts of smoke into the southern stratosphere. Within 1–2 months ground…
View article: Optimized Umkehr profile algorithm for ozone trend analyses
Optimized Umkehr profile algorithm for ozone trend analyses Open
The long-term record of Umkehr measurements from four NOAA Dobson spectrophotometers was reprocessed after updates to the instrument calibration procedures. In addition, a new data quality-control tool was developed for the Dobson automati…
View article: On the stratospheric chemistry of midlatitude wildfire smoke
On the stratospheric chemistry of midlatitude wildfire smoke Open
Significance Large wildfires have been observed to inject smoke into the stratosphere, raising questions about their potential to affect the stratospheric ozone layer that protects life on Earth from biologically damaging ultraviolet radia…
View article: Comment on amt-2021-203
Comment on amt-2021-203 Open
Abstract. The long-term record of Umkehr measurements from four NOAA Dobson spectrophotometers was reprocessed after updates to the instrument calibration procedures. In addition, a new data quality-control tool was developed for the Dobso…
View article: The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere
The NASA Atmospheric Tomography (ATom) Mission: Imaging the Chemistry of the Global Atmosphere Open
This article provides an overview of the NASA Atmospheric Tomography (ATom) mission and a summary of selected scientific findings to date. ATom was an airborne measurements and modeling campaign aimed at characterizing the composition and …
View article: Comment on amt-2021-203
Comment on amt-2021-203 Open
Abstract. The long-term record of Umkehr measurements from four NOAA Dobson spectrophotometers was reprocessed after updates to the instrument calibration procedures. In addition, a new data quality-control tool was developed for the Dobso…
View article: Optimized Umkehr profile algorithm for ozone trend analyses
Optimized Umkehr profile algorithm for ozone trend analyses Open
The long-term record of Umkehr measurements from four NOAA Dobson spectrophotometers was reprocessed after updates to the instrument calibration procedures. In addition, a new data quality-control tool was developed for the Dobson automati…
View article: ATom: Global Modeling Initiative (GMI) Chemical Transport Model (CTM) Output
ATom: Global Modeling Initiative (GMI) Chemical Transport Model (CTM) Output Open
This dataset contains Global Modeling Initiative (GMI) Chemical Transport Model (CTM) outputs from the four Atom campaigns. GMI simulations of the ATom flight periods have a horizontal resolution of 1.0 x 1.25 degrees, with output every 15…
View article: Stratospheric Fluorine as a Tracer of Circulation Changes: Comparison Between Infrared Remote‐Sensing Observations and Simulations With Five Modern Reanalyses
Stratospheric Fluorine as a Tracer of Circulation Changes: Comparison Between Infrared Remote‐Sensing Observations and Simulations With Five Modern Reanalyses Open
Using multidecadal time series of ground‐based and satellite Fourier transform infrared measurements of inorganic fluorine (i.e., total fluorine resident in stratospheric fluorine reservoirs), we investigate stratospheric circulation chang…
View article: Tropospheric Age‐of‐Air: Influence of SF<sub>6</sub> Emissions on Recent Surface Trends and Model Biases
Tropospheric Age‐of‐Air: Influence of SF<sub>6</sub> Emissions on Recent Surface Trends and Model Biases Open
The mean age since air was last at the Northern Hemisphere (NH) midlatitude surface is a fundamental property of tropospheric transport. Here we approximate the mean age in terms of an age” ( ), derived from surface and aircraft measuremen…
View article: Antarctica and the Southern Ocean
Antarctica and the Southern Ocean Open
The Southern Ocean (SO) plays a unique role in the climate system and is responsible for 40%of oceanic anthropogenic carbon dioxide (CO2) uptake and 75% of the ocean's uptake of heatfrom the atmosphere (Frolicher et al. 2015). The relative…
View article: COVID‐19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere
COVID‐19 Crisis Reduces Free Tropospheric Ozone Across the Northern Hemisphere Open
Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low ozone in the free troposphere. From April to August, and from 1 to 8 kilometers altitude, ozone was on average 7% (≈4 nmol/mol) below the…
View article: Evolution of observed ozone, trace gases, and meteorological variables over Arrival Heights, Antarctica &#x00028;77.8&#x000B0;S, 166.7&#x000B0;E&#x00029; during the 2019 Antarctic stratospheric sudden warming
Evolution of observed ozone, trace gases, and meteorological variables over Arrival Heights, Antarctica (77.8°S, 166.7°E) during the 2019 Antarctic stratospheric sudden warming Open
We use ground-based spectroscopic remote sensing measurements of the stratospheric trace gases O3, HCl, ClO, BrO, HNO3, NO2, OClO, ClONO2, N2O and HF, along with radiosonde profiles of temperature to track the springtime development of the…
View article: Did the COVID-19 Crisis Reduce Free Tropospheric Ozone across the Northern Hemisphere?
Did the COVID-19 Crisis Reduce Free Tropospheric Ozone across the Northern Hemisphere? Open
Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low ozone in the free troposphere. From April to August, and from 1 to 8 kilometers altitude, ozone was on average 7% (~4 ppbv) below the 200…
View article: Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream
Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream Open
We investigate the relationships among summertime ozone (O3), temperature, and humidity on daily timescales across the Northern Hemisphere using observations and model simulations. Temperature and humidity are significantly positively corr…
View article: Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018
Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018 Open
Total columns of the trace gases nitric acid (HNO 3 ) and hydrogen chloride (HCl) are sensitive to variations in the lower stratospheric age of air, a quantity that describes transport time scales in the stratosphere. Analyses of HNO 3 and…
View article: Antarctica and the Southern Ocean
Antarctica and the Southern Ocean Open
The Sea Ice Prediction Network (SIPN) is a community-wideeffort to assess seasonal sea ice forecasts for the Arctic. It hasbeen in operation since 2008, when it started life as the SEARCHSea Ice Outlook (Hamilton and Stroeve 2016). This in…
View article: Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream
Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream Open
Earth and Space Science Open Archive This work was has been accepted for publication in Journal of Geophysical Research - Atmospheres. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be p…
View article: Validation of SAGE III/ISS Solar Occultation Ozone Products With Correlative Satellite and Ground‐Based Measurements
Validation of SAGE III/ISS Solar Occultation Ozone Products With Correlative Satellite and Ground‐Based Measurements Open
The Stratospheric Aerosol and Gas Experiment III on the International Space Station (SAGE III/ISS) was launched on 19 February 2017 and began routine operation in June 2017. The first 2 years of SAGE III/ISS (v5.1) solar occultation ozone …
View article: Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream
Surface ozone-meteorology relationships: Spatial variations and the role of the jet stream Open
We investigate the relationships among summertime ozone (O3), temperature, and humidity on daily timescales across the Northern Hemisphere using observations and model simulations. Temperature and humidity are significantly positively corr…
View article: A machine learning examination of hydroxyl radical differences among model simulations for CCMI-1
A machine learning examination of hydroxyl radical differences among model simulations for CCMI-1 Open
The hydroxyl radical (OH) plays critical roles within the troposphere, such as determining the lifetime of methane (CH4), yet is challenging to model due to its fast cycling and dependence on a multitude of sources and sinks. As a result, …
View article: Validation of SAGE III/ISS Solar Ozone Data with Correlative Satellite and Ground Based Measurements
Validation of SAGE III/ISS Solar Ozone Data with Correlative Satellite and Ground Based Measurements Open
The Stratospheric Aerosol and Gas Experiment III on the International Space Station (SAGE III/ISS) was launched on February 19, 2017 and began routine operation in June 2017. The first two years of SAGE III/ISS (v5.1) solar ozone data were…
View article: Full Results Accompanying A Machine Learning Examination of Hydroxyl Radical Differences Among Model Simulations for CCMI-1
Full Results Accompanying A Machine Learning Examination of Hydroxyl Radical Differences Among Model Simulations for CCMI-1 Open
The hydroxyl radical (OH) plays critical roles within the troposphere, such as determining the lifetime of methane (CH4), yet is challenging to model due to its fast cycling and dependence on a multitude of sources and sinks. As a result, …
View article: A Machine Learning Examination of Hydroxyl Radical DifferencesAmong Model Simulations for CCMI-1
A Machine Learning Examination of Hydroxyl Radical DifferencesAmong Model Simulations for CCMI-1 Open
Hydroxyl radical (OH) plays critical roles within the troposphere, such as determining the lifetime of methane (CH4), yet is challenging to model due to its fast cycling and dependence on a multitude of sources and sinks. As a result, the …
View article: Disentangling the Drivers of the Summertime Ozone‐Temperature Relationship Over the United States
Disentangling the Drivers of the Summertime Ozone‐Temperature Relationship Over the United States Open
Summertime surface‐level ozone (O 3 ) is known to vary with temperature, but the relative roles of different processes responsible for causing the O 3 ‐temperature relationship are not well quantified. In this study we use simulations of N…