Michael Sigmond
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View article: Reduced aerosol pollution diminished cloud reflectivity over the North Atlantic and Northeast Pacific
Reduced aerosol pollution diminished cloud reflectivity over the North Atlantic and Northeast Pacific Open
View article: Observed warming of cold extremes is not captured with a fixed threshold definition
Observed warming of cold extremes is not captured with a fixed threshold definition Open
View article: Models and observations agree on fewer and milder midlatitude cold extremes even over recent decades of rapid Arctic warming
Models and observations agree on fewer and milder midlatitude cold extremes even over recent decades of rapid Arctic warming Open
An apparent increase in observed cold extremes over recent decades in the northern midlatitudes has been reported, in contrast to robust decreases predicted by climate models. This discrepancy has led to suggestions that models fail to acc…
View article: Northern Hemisphere Stratosphere‐Troposphere Circulation Change in CMIP6 Models: 2. Mechanisms and Sources of the Spread
Northern Hemisphere Stratosphere‐Troposphere Circulation Change in CMIP6 Models: 2. Mechanisms and Sources of the Spread Open
We analyze the sources for spread in the response of the Northern Hemisphere wintertime stratospheric polar vortex (SPV) to global warming in Climate Model Intercomparison Project Phase 5 (CMIP5) and Phase 6 (CMIP6) model projections. Abou…
View article: Stronger Arctic amplification from anthropogenic aerosols than from greenhouse gases
Stronger Arctic amplification from anthropogenic aerosols than from greenhouse gases Open
Arctic amplification (AA), the greater Arctic surface warming compared to the global average, has been widely attributed to increasing concentrations of greenhouse gases (GHG). However, less is known about the impacts of other forcings - n…
View article: The role of the basic state in the climate response to future Arctic sea ice loss
The role of the basic state in the climate response to future Arctic sea ice loss Open
There is great uncertainty in the atmospheric circulation response to future Arctic sea ice loss, with some models predicting a shift towards the negative phase of the North Atlantic Oscillation (NAO), while others predicting a more neutra…
View article: Predicting September Arctic Sea Ice: A Multimodel Seasonal Skill Comparison
Predicting September Arctic Sea Ice: A Multimodel Seasonal Skill Comparison Open
This study quantifies the state of the art in the rapidly growing field of seasonal Arctic sea ice prediction. A novel multimodel dataset of retrospective seasonal predictions of September Arctic sea ice is created and analyzed, consisting…
View article: Improvements in the Canadian Earth System Model (CanESM) through systematic model analysis: CanESM5.0 and CanESM5.1
Improvements in the Canadian Earth System Model (CanESM) through systematic model analysis: CanESM5.0 and CanESM5.1 Open
The Canadian Earth System Model version 5.0 (CanESM5.0), the most recent major version of the global climate model developed at the Canadian Centre for Climate Modelling and Analysis (CCCma) at Environment and Climate Change Canada (ECCC),…
View article: Reply to referee comments gmd-2023-52
Reply to referee comments gmd-2023-52 Open
Abstract. The Canadian Earth System Model version 5.0 (CanESM5.0), the most recent major version of the global climate model developed at the Canadian Centre for Climate Modelling and Analysis (CCCma) at Environment and Cl…
View article: A4D standardized diagnostics software and technical reports
A4D standardized diagnostics software and technical reports Open
This zenodo repo contains version 1.0 of the CCCma/A4D standard diagnostic package, which is a package that compares model simulations with observations. It is built on top of ESMValtool, using an in-house python routine. Code and document…
View article: A4D standardized diagnostics software and technical reports
A4D standardized diagnostics software and technical reports Open
This zenodo repo contains version 1.0 of the CCCma/A4D standard diagnostic package, which is a package that compares model simulations with observations. It is built on top of ESMValtool, using an in-house python routine. Code and document…
View article: Supplement of Sigmond et al, 2023, Geoscientific Model Development (https://doi.org/10.5194/gmd-2023-52)
Supplement of Sigmond et al, 2023, Geoscientific Model Development (https://doi.org/10.5194/gmd-2023-52) Open
The CCCma standard diagnostics is a package that compares model simulations with observations. It is build on top of ESMValtool, using an in-house python routine. A preliminary version of this tool has been been applied to CanESM5.0-p2, Ca…
View article: SIPN South: six years of coordinated seasonal Antarctic sea ice predictions
SIPN South: six years of coordinated seasonal Antarctic sea ice predictions Open
Antarctic sea ice prediction has garnered increasing attention in recent years, particularly in the context of the recent record lows of February 2022 and 2023. As Antarctica becomes a climate change hotspot, as polar tourism booms, and as…
View article: Improvements in the Canadian Earth System Model (CanESM) through systematic model analysis: CanESM5.0 and CanESM5.1
Improvements in the Canadian Earth System Model (CanESM) through systematic model analysis: CanESM5.0 and CanESM5.1 Open
The Canadian Earth System Model version 5.0 (CanESM5.0), the most recent major version of the global climate model developed at the Canadian Centre for Climate Modelling and Analysis (CCCma) at Environment and Climate Change Canada (ECCC),…
View article: Large Contribution of Ozone‐Depleting Substances to Global and Arctic Warming in the Late 20th Century
Large Contribution of Ozone‐Depleting Substances to Global and Arctic Warming in the Late 20th Century Open
While previous studies have suggested a substantial role of ozone‐depleting substances (ODSs) in historical climate change, their relative contribution to historical anthropogenic warming has not been quantified before. Analyzing all‐but‐o…
View article: Clean air policies are key for successfully mitigating Arctic warming
Clean air policies are key for successfully mitigating Arctic warming Open
View article: Northern Hemisphere Stratosphere‐Troposphere Circulation Change in CMIP6 Models: 1. Inter‐Model Spread and Scenario Sensitivity
Northern Hemisphere Stratosphere‐Troposphere Circulation Change in CMIP6 Models: 1. Inter‐Model Spread and Scenario Sensitivity Open
Projected changes in the Northern Hemisphere stratospheric polar vortex are analyzed using Climate Model Intercomparison Project Phase 6 experiments. Previous studies showed that projections of the wintertime zonally averaged polar vortex …
View article: Model and observations used for Sigmond, M. et al, 'Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th century", Geophysical Research Letters
Model and observations used for Sigmond, M. et al, 'Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th century", Geophysical Research Letters Open
This dataset contains all the data used for the study "Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th Century" by Sigmond et al, which was submitted to Geophysical Research Letters on July 26…
View article: Model and observations used for Sigmond, M. et al, 'Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th century", Geophysical Research Letters
Model and observations used for Sigmond, M. et al, 'Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th century", Geophysical Research Letters Open
This dataset contains all the data used for the study "Large contribution of ozone-depleting substances to global and Arctic warming in the late 20th Century" by Sigmond et al, which was submitted to Geophysical Research Letters on July 26…
View article: Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): a protocol for investigating the role of stratospheric polar vortex disturbances in subseasonal to seasonal forecasts
Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): a protocol for investigating the role of stratospheric polar vortex disturbances in subseasonal to seasonal forecasts Open
Major disruptions of the winter season, high-latitude stratospheric polar vortices can result in stratospheric anomalies that persist for months. These sudden stratospheric warming events are recognized as an important potential source of …
View article: Long-range prediction and the stratosphere
Long-range prediction and the stratosphere Open
Over recent years there have been concomitant advances in the development of stratosphere-resolving numerical models, our understanding of stratosphere–troposphere interaction, and the extension of long-range forecasts to explicitly includ…
View article: Comment on gmd-2021-394
Comment on gmd-2021-394 Open
Abstract. Major disruptions of the winter season, high-latitude, stratospheric polar vortices can result in stratospheric anomalies that persist for months. These sudden stratospheric warming events are recognized as an im…
View article: Robust but weak winter atmospheric circulation response to future Arctic sea ice loss
Robust but weak winter atmospheric circulation response to future Arctic sea ice loss Open
View article: Comment on gmd-2021-394
Comment on gmd-2021-394 Open
Abstract. Major disruptions of the winter season, high-latitude stratospheric polar vortices can result in stratospheric anomalies that persist for months. These sudden stratospheric warming events are recognized as an imp…
View article: Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): A Protocol for Investigating the Role of the Stratospheric Polar Vortex in Subseasonal to Seasonal Forecasts
Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): A Protocol for Investigating the Role of the Stratospheric Polar Vortex in Subseasonal to Seasonal Forecasts Open
Major disruptions of the winter season, high-latitude, stratospheric polar vortices can result in stratospheric anomalies that persist for months. These sudden stratospheric warming events are recognized as an important potential source of…
View article: A Minimal Model to Diagnose the Contribution of the Stratosphere to Tropospheric Forecast Skill
A Minimal Model to Diagnose the Contribution of the Stratosphere to Tropospheric Forecast Skill Open
Many recent studies have confirmed that variability in the stratosphere is a significant source of surface sub‐seasonal prediction skill during Northern Hemisphere winter. It may be beneficial, therefore, to think about times in which ther…
View article: Comment on acp-2021-719
Comment on acp-2021-719 Open
Abstract. Over recent years there have been concomitant advances in the development of stratosphere-resolving numerical models, our understanding of stratosphere–troposphere interaction, and the extension of long-range for…
View article: Comment on acp-2021-719
Comment on acp-2021-719 Open
Abstract. Over recent years there have been concomitant advances in the development of stratosphere-resolving numerical models, our understanding of stratosphereâtroposphere interaction, and the extension of long-range f…
View article: Long Range Prediction and the Stratosphere
Long Range Prediction and the Stratosphere Open
Over recent years there have been parallel advances in the development of stratosphere resolving numerical models, our understanding of stratosphere-troposphere interaction and the extension of long-range forecasts to explicitly include th…
View article: A minimal model to diagnose the contribution of the stratosphere to tropospheric forecast skill
A minimal model to diagnose the contribution of the stratosphere to tropospheric forecast skill Open
Earth and Space Science Open Archive This work 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 preli…