Stephen Bourguet
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View article: Impact of leakage during HFC-125 production on the increase in HCFC-123 and HCFC-124 emissions
Impact of leakage during HFC-125 production on the increase in HCFC-123 and HCFC-124 emissions Open
Hydrochlorofluorocarbons (HCFCs) are ozone-depleting substances whose production and consumption have been phased out under the Montreal Protocol in non-Article 5 (mainly developed) countries and are currently being phased out in the rest …
View article: Semi-empirical estimates of stratospheric circulation and the lifetimes of chlorofluorocarbons and carbon tetrachloride
Semi-empirical estimates of stratospheric circulation and the lifetimes of chlorofluorocarbons and carbon tetrachloride Open
Chlorofluorocarbons (CFCs) and carbon tetrachloride (CCl 4 ) are ozone-depleting substances with high radiative efficiencies; however, uncertainties in their atmospheric lifetimes hinder top-down emission monitoring efforts. Here, we compu…
View article: Increasing emissions of HCFC-123 and HCFC-124 may be due to leakage during HFC-125 production
Increasing emissions of HCFC-123 and HCFC-124 may be due to leakage during HFC-125 production Open
Hydrochlorofluorocarbons (HCFCs) are ozone-depleting substances whose production and consumption have been phased out under the Montreal Protocol in non-Article 5 (mainly developed) countries and are currently being phased out in the rest …
View article: Bayesian modeling of HFC production pipeline suggests growth in unreported CFC by-product and feedstock production
Bayesian modeling of HFC production pipeline suggests growth in unreported CFC by-product and feedstock production Open
Observationally-derived emissions of regulated ozone depleting substances (ODSs) must be scrutinized to maintain the progress made by the Montreal Protocol in protecting the stratospheric ozone layer. Recent observations of three chloroflu…
View article: Stratospheric transport and tropospheric sink of solar geoengineering aerosol: a Lagrangian analysis
Stratospheric transport and tropospheric sink of solar geoengineering aerosol: a Lagrangian analysis Open
Stratospheric aerosol injection (SAI) aims to reflect solar radiation by increasing the stratospheric aerosol burden. To understand how the background circulation influences stratospheric transport of injected particles, we use a Lagrangia…
View article: Optimizing Injection Locations Relaxes Altitude‐Lifetime Trade‐Off for Stratospheric Aerosol Injection
Optimizing Injection Locations Relaxes Altitude‐Lifetime Trade‐Off for Stratospheric Aerosol Injection Open
Stratospheric Aerosol Injection (SAI) aims to offset some climate hazards by injecting aerosols into the stratosphere to reflect solar radiation. The lifetime of injected particles influences SAI's radiative efficacy—the ratio of radiative…
View article: The Impact of Ozone Production on Future Cold Point Tropopause Warming and Expansion
The Impact of Ozone Production on Future Cold Point Tropopause Warming and Expansion Open
A robust thermodynamic response of increased greenhouse gas forcing is an expansion of the troposphere, which may decrease ozone concentrations in the lower stratosphere and warm the tropopause. Yet, observations of lower stratospheric ozo…
View article: The Impact of Ozone Production on Future Cold Point Tropopause Warming and Expansion
The Impact of Ozone Production on Future Cold Point Tropopause Warming and Expansion Open
This is the data and code required to produce the Figures and numbers for The Impact of Ozone Production on Future Cold Point Tropopause Warming and Expansion (submitted to GRL).
View article: Weakening of the tropical tropopause layer cold trap with global warming
Weakening of the tropical tropopause layer cold trap with global warming Open
Lagrangian trajectories have previously been used to reconstruct water vapor variability in the lower stratosphere, where the sensitivity of surface radiation to changes in the water vapor concentration is strongest, by obtaining temperatu…
View article: Comment on egusphere-2023-262
Comment on egusphere-2023-262 Open
Abstract. Lagrangian trajectories have previously been used to reconstruct water vapor variability in the lower stratosphere, where the sensitivity of surface radiation to changes in the water vapor concentration is strongest, by obtaining…
View article: How Do Different Processes Shape Temperature Probability Distributions? A Percentile-Averaged Temperature Tendency Decomposition
How Do Different Processes Shape Temperature Probability Distributions? A Percentile-Averaged Temperature Tendency Decomposition Open
Studying temperature probability distributions and the physical processes that shape them is important for understanding extreme temperature events. Previous work has used a conditional mean temperature framework to reveal whether horizont…
View article: Comment on egusphere-2023-262
Comment on egusphere-2023-262 Open
Abstract. Lagrangian trajectories have previously been used to reconstruct water vapor variability in the lower stratosphere, where the sensitivity of surface radiation to changes in the water vapor concentration is strongest, by obtaining…
View article: Weakening of the Tropical Tropopause Layer Cold Trap with Global Warming
Weakening of the Tropical Tropopause Layer Cold Trap with Global Warming Open
Lagrangian trajectories have previously been used to reconstruct water vapor variability in the lower stratosphere, where the sensitivity of surface radiation to changes in the water vapor concentration is strongest, by obtaining temperatu…
View article: The impact of improved spatial and temporal resolution of reanalysis data on Lagrangian studies of the tropical tropopause layer
The impact of improved spatial and temporal resolution of reanalysis data on Lagrangian studies of the tropical tropopause layer Open
Lagrangian trajectories are frequently used to trace air parcels from the troposphere to the stratosphere through the tropical tropopause layer (TTL), and the coldest temperatures of these trajectories have been used to reconstruct water v…
View article: Comment on acp-2022-159
Comment on acp-2022-159 Open
Abstract. Lagrangian trajectories are frequently used to trace air parcels from the troposphere to the stratosphere through the tropical tropopause layer (TTL), and the coldest temperatures of these trajectories have been used to reconstru…
View article: Sensitive Dependence of Global Climate to Continental Geometry
Sensitive Dependence of Global Climate to Continental Geometry Open
Over its multibillion‐year history, the Earth has experienced a wide range of climates. The long‐term climate is controlled by the atmospheric carbon dioxide concentration, which is regulated by marine sequestration through chemical weathe…
View article: Comment on acp-2022-159
Comment on acp-2022-159 Open
Lagrangian trajectories are frequently used to trace air parcels from the troposphere to the stratosphere through the tropical tropopause layer (TTL), and the coldest temperatures of these trajectories have been used to reconstruct water v…
View article: The Impact of Improved Spatial and Temporal Resolution of Reanalysis Data on Lagrangian Studies of the Tropical Tropopause Layer
The Impact of Improved Spatial and Temporal Resolution of Reanalysis Data on Lagrangian Studies of the Tropical Tropopause Layer Open
Lagrangian trajectories are frequently used to trace air parcels from the troposphere to the stratosphere through the tropical tropopause layer (TTL), and the coldest temperatures of these trajectories have been used to reconstruct water v…
View article: Vapor Pressure of Nine Perfluoroalkyl Substances (PFASs) Determined Using the Knudsen Effusion Method
Vapor Pressure of Nine Perfluoroalkyl Substances (PFASs) Determined Using the Knudsen Effusion Method Open
Sublimation vapor pressures of nine pure perfluoroalkyl substances, including Ammonium perfluoro(2-methyl-3-oxahexanoate) (GenX), 1H,1H,2H,2H-Perfluoro-1-decanol (8:2 FTOH), 1H,1H,2H,2H-Perfluoro-1-dodecanol (10:2 FTOH) and C6 to C11 perfl…