Atmospheric Physics Seminars Past Events /
04
Apr
2022
Atmospheric river storms in western North America: attribution of the November 2021 BC event, impact-relevant diagnostic variables, and implications for communicating future projections
21
Mar
2022
TBA
07
Mar
2022
Stratospheric Ozone – Its role in the Earth system
“Without a protective ozone layer in the atmosphere, animals and plants could not exist, at least upon land. It is therefore of the greatest importance to understand the processes that regulate the atmosphere's ozone content.”
This quote from the Swedish Royal Academy of Sciences – announcing the 1995 Nobel Prize for Chemistry to Paul Crutzen, Mario Molina, and F. Sherwood Rowland – remains relevant to this day. The more we study stratospheric ozone, the more we realise its importance not only
14
Feb
2022
Anthropogenic aerosol and the Asian summer monsoon
Almost half of the world's population rely on the Asian summer monsoon (ASM) precipitation for agriculture, energy, industry, and local water resources. Small changes in the onset, intensity, and duration of the ASM can result in considerable socio-economic impacts. An observed drying trend in ASM precipitation in the latter half of the 20th century opposed the anticipated impact of increasing greenhouse gas emissions, and has largely been attributed to increases in anthropogenic aerosol. Recent
31
Jan
2022
MethaneSAT and MethaneAIR: Mitigating methane emissions from the oil and gas sector.
Methane emissions have major impacts on atmospheric composition and radiative forcing of climate change. The MethaneSAT satellite, and its companion aircraft instrument, MethaneAIR, are new imaging spectrometers intended to contribute in a major way to solving this important problem. MethaneSAT will provide measurements on regional scales (~200 x 200 km) with high spatial resolution (~130 m x 450 m) and precision, while MethaneAIR has a swath width of 4.5 km and pixel size of 5 x 25m. The missio
17
Jan
2022
Global wind profiles from space with the first wind lidar in space on ESA´s Aeolus mission
The European Space Agency (ESA)’s Earth Explorer Aeolus was launched in August 2018 carrying the world’s first spaceborne wind lidar, the Atmospheric Laser Doppler Instrument (ALADIN). ALADIN uses a high spectral resolution Doppler wind lidar operating at an ultraviolet wavelength of 355 nm to measure profiles of line-of-sight wind component. ALADIN samples the atmosphere from 30 km altitude down to the Earth’s surface or to the level where the signal is attenuated by optically thick clouds. Bes
06
Dec
2021
Representing human-dimension processes and their impacts in the community WRF model
Urbanization and agriculture are well-known examples of how human activities inadvertently modify weather and climate. Advancing the understanding of the nexus among food, energy, and water systems has recently emerged as a new science frontier, and the research community started modeling urbanization and agricultural management in earth-system models to develop an integrated modeling tool for investigating relevant land-atmosphere interactions and agriculture and urban sustainability issues. Ho
22
Nov
2021
Monitoring atmospheric methane by Environment and Climate Change Canada
Dr. Vogel is a research scientist in ECCC’s Climate Research Division since 2017 and investigates greenhouse gas emissions using atmospheric observations. In recent weeks, the global attention has been drawn towards methane mitigation. In this week’s seminar, Dr. Vogel will review ECCC research efforts on methane sources in Canada from provincial to site-scale. In many cases methane emissions have been found to follow a power-law with a small amount of super-emitters overly contributing to total
01
Nov
2021
Constraining Equilibrium Climate Sensitivity through Simulation of Past Extreme Climates
Equilibrium climate sensitivity (ECS), the global surface temperature increase to the radiative forcing caused by a doubling of atmospheric CO2 concentration, is the single number that describes the severity of long-term climate change. Global climate models have been an important tool for estimating ECS and understanding the relevant physics. Recent Coupled Model Intercomparison Project phase 6 (CMIP6) models simulated an ECS range of 1.8–5.6 ℃, with an upper end substantially higher than previ
18
Oct
2021
Constraints on Terrestrial Model Parameters from Ensemble Forward Simulations
04
Oct
2021
Spurious climate impacts in sea ice loss simulations
20
Sep
2021
Simulating short-lived climate forcers - at CCCma and with AMAP
13
Oct
2020
Origin and dynamics of thermohaline staircases in the ocean.
30
Mar
2020
TBA
02
Mar
2020
Sea ice controls the positive polar lapse rate feedback
11
Feb
2020
Aerosol in the Arctic Summertime: Particle Formation and Growth, Clouds and Melting Sea Ice
27
Jan
2020
Satellite remote sensing of aerosol: present and future
13
Jan
2020
Snow, snow everywhere!
11
Nov
2019
Intensifying fire regimes in the High North: Climatic drivers and consequences
28
Oct
2019
Methane Emissions from Natural Gas Distribution and End-use
15
Oct
2019
Understanding the Role of Large-Scale Atmospheric Circulation in Weather Extremes
30
Sep
2019
Atmospheric Boundary Layers: Impacts of heterogeneity
16
Sep
2019
Understanding the Impact of Arctic Amplification on the Midlatitude Circulation Using a Hierarchy of Models
01
Apr
2019
Air quality impacts from the electrification of passenger vehicles in the U.S.
18
Mar
2019
Contrasting the Hydrological Cycle in Past and Future Warm Climates - with implications for Ocean Overturning Circulatio