Kathryn McKain
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View article: Numerical Representation of Contemporary Atmospheric Δ <sup>14</sup> CO <sub>2</sub> : 2. Three‐Dimensional Simulation and Comparison With Observations
Numerical Representation of Contemporary Atmospheric Δ <sup>14</sup> CO <sub>2</sub> : 2. Three‐Dimensional Simulation and Comparison With Observations Open
The 14 C:C ratio in atmospheric CO 2 (expressed as Δ 14 C) is a powerful tracer of Earth system carbon cycle processes. In the 21st century, spatio‐temporal variations of atmospheric Δ 14 C are mainly the result of anthropogenic fossil CO …
View article: Global Observations of Acetyl Peroxynitrate (PAN) in the Remote Troposphere
Global Observations of Acetyl Peroxynitrate (PAN) in the Remote Troposphere Open
We present global airborne observations of acetyl peroxynitrate (CH 3 C(O)OONO 2 , PAN) in the remote troposphere from the Atmospheric Tomography (ATom) campaign. These observations show that biomass burning is the dominant source of PAN i…
View article: A top-down view of global and regional carbon budgets from an ensemble of atmospheric inversions
A top-down view of global and regional carbon budgets from an ensemble of atmospheric inversions Open
International audience
View article: Global CH <sub>4</sub> fluxes derived from JAXA/GOSAT lower-tropospheric partial column data and the CarbonTracker Europe-CH <sub>4</sub> atmospheric inverse model
Global CH <sub>4</sub> fluxes derived from JAXA/GOSAT lower-tropospheric partial column data and the CarbonTracker Europe-CH <sub>4</sub> atmospheric inverse model Open
Satellite-driven inversions provide valuable information about methane (CH4) fluxes, but the assimilation of total column-averaged dry-air mole fractions of CH4 (XCH4) has been challenging. This study explores, for the first time, the pote…
View article: Advancing CH <sub>4</sub> and N <sub>2</sub> O retrieval strategies for NDACC/IRWG FTIR observations with the support of airborne in situ measurements
Advancing CH <sub>4</sub> and N <sub>2</sub> O retrieval strategies for NDACC/IRWG FTIR observations with the support of airborne in situ measurements Open
Atmospheric methane (CH4) and nitrous oxide (N2O) are potent greenhouse gases with significant impacts on climate change. Accurate measurement of their atmospheric abundance is essential for understanding their sources, sinks, and the impa…
View article: An Unexpected Seasonal Cycle in U.S. Oil and Gas Methane Emissions
An Unexpected Seasonal Cycle in U.S. Oil and Gas Methane Emissions Open
Accurate quantification of methane (CH4) emissions is essential for understanding changes in its atmospheric abundance. Atmospheric observations can supply independent emission information that complements and strengthens inventory-based e…
View article: Midwestern N<sub>2</sub>O Emissions Linked at Regional Scales to Remotely Sensed Soil Moisture in a North American Inversion
Midwestern N<sub>2</sub>O Emissions Linked at Regional Scales to Remotely Sensed Soil Moisture in a North American Inversion Open
The interactions between soil moisture (SM), agricultural practices, and microbially driven N 2 O emissions have been described in detail at the field scale. The relationships among those variables are investigated here at larger scales us…
View article: Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations
Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations Open
We perform an inverse modelling analysis to quantify biomass burning emissions of carbon monoxide (CO) from the extreme wildfires in Canada between May and September 2023. Using the GEOS-Chem model, we assimilated observations from the Tro…
View article: Quantification of regional net CO <sub>2</sub> flux errors in the Orbiting Carbon Observatory-2 (OCO-2) v10 model intercomparison project (MIP) ensemble using airborne measurements
Quantification of regional net CO <sub>2</sub> flux errors in the Orbiting Carbon Observatory-2 (OCO-2) v10 model intercomparison project (MIP) ensemble using airborne measurements Open
Inverse model intercomparison projects (MIPs) provide a chance to assess the uncertainties in inversion estimates arising from various sources. However, accurately quantifying ensemble CO2 flux errors remains challenging and often relies o…
View article: Global CH <sub>4</sub> Fluxes Derived from JAXA/GOSAT Lower Tropospheric Partial Column Data and the CTE-CH <sub>4</sub> Atmospheric Inverse Model
Global CH <sub>4</sub> Fluxes Derived from JAXA/GOSAT Lower Tropospheric Partial Column Data and the CTE-CH <sub>4</sub> Atmospheric Inverse Model Open
Satellite-driven inversions provide valuable information about methane (CH4) fluxes, but the assimilation of total column-averaged dry-air mole fractions of CH4 (XCH4) has been challenging. This study explores, for the first time, the pote…
View article: Advancing CH <sub>4</sub> and N <sub>2</sub> O retrieval strategies for NDACC/IRWG high-resolution direct-sun FTIR Observations
Advancing CH <sub>4</sub> and N <sub>2</sub> O retrieval strategies for NDACC/IRWG high-resolution direct-sun FTIR Observations Open
Atmospheric methane (CH4) and nitrous oxide (N2O) are potent greenhouse gases with significant impacts on climate change. Accurate measurement of their atmospheric abundance is essential for understanding their sources, sinks, and the impa…
View article: Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations
Quantifying CO emissions from boreal wildfires by assimilating TROPOMI and TCCON observations Open
We perform a global inverse modelling analysis to quantify biomass burning emissions of carbon monoxide (CO) from the extreme wildfires in Canada between May and September 2023. Using the GEOS-Chem model, we assimilated observations at 3 d…
View article: The Total Carbon Column Observing Network's GGG2020 data version
The Total Carbon Column Observing Network's GGG2020 data version Open
The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs), beginning in 2004, from over 30 current or past measurement sites around the world using solar absorption spectros…
View article: California dominates U.S. emissions of the pesticide and potent greenhouse gas sulfuryl fluoride
California dominates U.S. emissions of the pesticide and potent greenhouse gas sulfuryl fluoride Open
Sulfuryl fluoride (SO 2 F 2 ) is a synthetic pesticide and a potent greenhouse gas that is accumulating in the global atmosphere. Rising emissions are a concern since SO 2 F 2 has a relatively long atmospheric lifetime and a high global wa…
View article: Comment on egusphere-2023-2258
Comment on egusphere-2023-2258 Open
Abstract. Multi-inverse modeling inter-comparison projects (MIPs) provide a chance to assess the uncertainties in inversion estimates arising from various sources such as atmospheric CO2 observations, transport models, and prior fluxes. Ho…
View article: Comment on egusphere-2023-2258
Comment on egusphere-2023-2258 Open
Abstract. Multi-inverse modeling inter-comparison projects (MIPs) provide a chance to assess the uncertainties in inversion estimates arising from various sources such as atmospheric CO2 observations, transport models, and prior fluxes. Ho…
View article: Neutral Tropical African CO<sub>2</sub> Exchange Estimated From Aircraft and Satellite Observations
Neutral Tropical African CO<sub>2</sub> Exchange Estimated From Aircraft and Satellite Observations Open
Tropical lands play an important role in the global carbon cycle yet their contribution remains uncertain owing to sparse observations. Satellite observations of atmospheric carbon dioxide (CO 2 ) have greatly increased spatial coverage ov…
View article: Application of the Multi-Scale Infrastructure for Chemistry and Aerosols version 0 (MUSICAv0) for air quality research in Africa
Application of the Multi-Scale Infrastructure for Chemistry and Aerosols version 0 (MUSICAv0) for air quality research in Africa Open
The Multi-Scale Infrastructure for Chemistry and Aerosols Version 0 (MUSICAv0) is a new community modeling infrastructure that enables the study of atmospheric composition and chemistry across all relevant scales. We develop a MUSICAv0 gri…
View article: Quantification of regional terrestrial biosphere CO <sub>2</sub> flux errors in v10 OCO-2 MIP models using airborne measurements
Quantification of regional terrestrial biosphere CO <sub>2</sub> flux errors in v10 OCO-2 MIP models using airborne measurements Open
Multi-inverse modeling inter-comparison projects (MIPs) provide a chance to assess the uncertainties in inversion estimates arising from various sources such as atmospheric CO2 observations, transport models, and prior fluxes. However, acc…
View article: Comment on essd-2023-331
Comment on essd-2023-331 Open
Abstract. The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs) beginning in 2004 from over 30 current or past measurement sites around the world, using solar absorption…
View article: The Total Carbon Column Observing Network's GGG2020 Data Version
The Total Carbon Column Observing Network's GGG2020 Data Version Open
The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs) beginning in 2004 from over 30 current or past measurement sites around the world, using solar absorption spectrosc…
View article: An observation-based, reduced-form model for oxidation in the remote marine troposphere
An observation-based, reduced-form model for oxidation in the remote marine troposphere Open
The hydroxyl radical (OH) fuels atmospheric chemical cycling as the main sink for methane and a driver of the formation and loss of many air pollutants, but direct OH observations are sparse. We develop and evaluate an observation-based pr…
View article: Comment on gmd-2023-50
Comment on gmd-2023-50 Open
Abstract. The Multi-Scale Infrastructure for Chemistry and Aerosols Version 0 (MUSICAv0) is a new community modeling infrastructure that enables the study of atmospheric composition and chemistry across all relevant scales. We develop a MU…
View article: Inferring the vertical distribution of CO and CO <sub>2</sub> from TCCON total column values using the TARDISS algorithm
Inferring the vertical distribution of CO and CO <sub>2</sub> from TCCON total column values using the TARDISS algorithm Open
We describe an approach for determining limited information about the vertical distribution of carbon monoxide (CO) and carbon dioxide (CO2) from total column ground-based Total Carbon Column Observation Network (TCCON) observations. For C…
View article: Application of the Multi-Scale Infrastructure for Chemistry and Aerosols version 0 (MUSICAv0) for air quality in Africa
Application of the Multi-Scale Infrastructure for Chemistry and Aerosols version 0 (MUSICAv0) for air quality in Africa Open
The Multi-Scale Infrastructure for Chemistry and Aerosols Version 0 (MUSICAv0) is a new community modeling infrastructure that enables the study of atmospheric composition and chemistry across all relevant scales. We develop a MUSICAv0 gri…
View article: Neutral tropical African CO2 exchange estimated from aircraft and satellite observations
Neutral tropical African CO2 exchange estimated from aircraft and satellite observations Open
Tropical lands play an important role in the global carbon cycle yet their contribution remains uncertain owing to sparse observations. Satellite observations of atmospheric carbon dioxide (CO) have greatly increased spatial coverage over …