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Brewer-Wilson Seminar Series

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April 3, 2020
March 27, 2020
March 6, 2020
Opposite responses of the dry and moist eddy heat transport into the Arctic in the PAMIP experiments
March 13, 2020
March 20, 2020
Feb. 28, 2020
Multiscale observations of NH3 around Toronto, Canada
March 6, 2020
Quantum Simulation with Rydberg Atom Arrays
Jan. 31, 2020
Internal wave propagation through layered fluids
Jan. 17, 2020
Anthropogenic aerosols dominate forced Sahel precipitation variability through distinct atmospheric and oceanic drivers
Jan. 24, 2020
Understanding isoprene emissions in MEGAN 2.1
Feb. 7, 2020
Study lithosphere structures of Alaska using seismic imaging
Jan. 10, 2020
Methane measurements using portable FTS instruments in the GTA
Dec. 6, 2019
Halogen chemistry in Eureka: What are the sources of reactive bromine?
Nov. 29, 2019
The Response to High and Low Latitude Forcings in an Ensemble of Coupled Climate Models
Nov. 22, 2019
Isolating Fast and Slow Response of the Regional Climate over Asian Monsoon Region to Anthropogenic Aerosols using Variable Resolution-CESM
Nov. 25, 2019
Deep learning for detecting tropical cyclones and stationary fronts
Oct. 25, 2019
Unveiling the fine structure of Earth’s lithosphere by full wave seismic tomography
Nov. 1, 2019
Microseismic monitoring: Event detection, source localization & focal mechanism inversions
Oct. 18, 2019
Exploring snow-on-sea-ice modelling with NESOSIM: Examining the dependence on snowfall rate input
Oct. 4, 2019
Adventures with carbon monoxide: Space-based constraints on the oxidative capacity of the atmosphere
Oct. 11, 2019
Spatial and temporal variability of ammonia over Mexico City
Sept. 20, 2019
Recurrent U-Net: Deep learning to predict daily summertime ozone in the United States
Sept. 27, 2019
Cancelled for the Climate Strike rally
March 22, 2019
The impact of model resolution on ozone simulation
March 29, 2019
Infrared Emission Measurements in the High Arctic based on E-AERI
April 5, 2019
Dynamically Downscaled Climate Change Projections for the Indian Monsoon
April 12, 2019
Ocean Energy Budget Analysis: wind and buoyancy forcing and diapycnal mixing
Special talk given by visiting scholar
May 10, 2019
On the Phase Relationship Between Greenland Rapid Warming Transitions and their Expression in Antarctic Ice Cores: The Bipolar Seesaw of the Dansgaard-Oeschger Oscillation
March 8, 2019
Evaluating the performance of the Variable-resolution CESM for modeling regional climate over Southeast Asia
March 15, 2019
March 1, 2019
The coupled climate response to high-latitude forcing
Feb. 15, 2019
The Canadian Laser Absorption Spectrometer Experiment Test-bed (CALASET): In situ Measurements of CO2 and N2O from a Stratospheric Balloon
Feb. 8, 2019
The Ongoing Development of a Water Vapour Retrieval from the PARIS-IR Arctic Springtime Dataset
Jan. 18, 2019
Analysis of Ground-based FTIR Measurements at Toronto
Jan. 25, 2019
Heinrich Events: Tidal Forcing as a Cause for Rapid Deglaciations of the Hudson Strait Ice Stream.
Feb. 1, 2019
Validation of the Global Precipitation Measurement IMERG Products in the Canadian Arctic
Jan. 11, 2019
Under-ice stratification and convection in a large dimictic lake
Nov. 30, 2018
Quantifying tropospheric CO, O3 and OH using multi-species data assimilation
Dec. 7, 2018
The Salt Fingering Trigger of Rapid Climate Change in the Nonlinear Dansgaard-Oeschger Relaxation Oscillation
Nov. 23, 2018
Comparison between portable Fourier Transform Spectrometers (EM27/SUN) with TCCON
Nov. 9, 2018
On the Genesis and Intensification of Hurricanes
Special talk by Gilbert Brunet, ECCC and McGill University
Oct. 26, 2018
Detection of Wildfire Pollution in the Arctic using a Network of Ground-based FTIR Spectrometers
Nov. 2, 2018
Intercomparison of regionally-averaged surface snowfall rates from CloudSat and reanalysis products over the Arctic Ocean
Nov. 16, 2018
Meteorology of ozone pollution episodes
Oct. 19, 2018
Competing roles of the fast and slow response in the total coupled West African precipitation response to anthropogenic aerosol forcing
Oct. 5, 2018
3 perspectives of the impact of moisture on heat transport using an idealized model
Oct. 12, 2018
"It depends on how you look at it": validation of satellite ozone and NO2 measurements in the Arctic
Sept. 21, 2018
No impact of anthropogenic aerosols on early 21st century global temperature trends in a large initial-condition ensemble
May 18, 2018
May 11, 2018
April 20, 2018
Development of a Methane Emission Inventory for the Greater Toronto Area
April 27, 2018
The Portable Atmospheric Research Interferometric Spectrometer for the InfraRed (PARIS-IR): Twelve Years of Arctic Measurements
May 4, 2018
CO data assimilation using a weak-constraint 4D-Var system
April 6, 2018
The impact of model resolution on ozone simulation
April 13, 2018
March 9, 2018
March 23, 2018
Toronto Ground-based FTIR Observations of HCOOH Enhancement and its Source Attribution to Boreal Wildfires
March 2, 2018
Feb. 2, 2018
Icicle Ripples: examining a phase transition with impurities
Feb. 9, 2018
Dynamical Downscaling over the Great Lakes Basin: Uncertainty in WRF Regional Model Projections of future warming as a Function of Driving General Circulation Model.
Feb. 16, 2018
CO2 profile retrieval from near-infrared spectra
Jan. 19, 2018
On the mechanisms for warming the mid-Pliocene and the inference of a hierarchy of climate sensitivities with relevance to the understanding of climate futures
Jan. 26, 2018
The Role of Atmospheric and Oceanic Forcing on the Climate Response to Anthropogenic Aerosols
Dec. 8, 2017
Global CO and NOx emission estimates inferred from assimilation of MOPITT and OMI NO2 data, together with observations of O3 , HNO3 , and HCHO.
Jan. 12, 2018
Linking North American Summer Ozone Pollution Episodes to Subseasonal Atmospheric Variability
Nov. 24, 2017
High-frequency observations of temperature and dissolved oxygen reveal under-ice convection in a large lake
Detailed observations of thermal structure over two winters in a large lake reveal the presence of large (10-20 m) overturns under the ice, driven by diurnal solar heating. Convection can occur in the early winter, but the most vigorous convection occurred near the end of winter. Both periods are when our lake ice model suggest thinner ice that would have been transparent. This under-ice convection led to a deepening of the mixed layer over time, consistent with previous short-term studies. During periods of vigorous convection under the ice at the end of winter, the dissolved oxygen had become super-saturated from the surface to 23 m below the surface, suggesting abundant algal growth. Analysis of our high-frequency observations over the entire winter of 2015 using the Thorpe scale method quantified the scale of mixing. Furthermore, it revealed that changes in oxygen concentrations are closely related to the intensity of mixing that could be influenced by climate change or the increased input of salt into the lake. I will briefly present an overview of some of the basics of physical limnology before presenting our results.
Dec. 1, 2017
Bromine release in the high Arctic: what is the role of aerosols?
Exponential build-up of bromine in the polar troposphere is linked to severe multi-day ozone depletion events in springtime. Recent research suggests that saline snowpack and aerosols are the main sources of bromine, but the exact mechanisms of, and conditions required for these ‘bromine explosions’ are not well understood. The two main sources of aerosol in the Arctic spring are transported pollution (Arctic haze), and larger particles produced from the open ocean or potentially through the sublimation of blowing snow. Both types of particles are rich in sea salt and could contribute to bromine release. Eureka, Nunavut (80°N) is an excellent location to monitor springtime bromine explosions and aerosol concentrations. Profiles of bromine monoxide (BrO) retrieved from Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements show that there is no clear correlation between BrO concentration and haze aerosol. However, larger aerosols correlate well with observed BrO, indicating that these aerosols are likely a source of bromine. This talk investigates the potential direct and indirect links between bromine activation and aerosols in the high Arctic
Nov. 17, 2017
Characterizing atmospheric transport errors in models using GOSAT XCH4 retrievals
Nov. 10, 2017
Comparing the robustness of the coupled circulation response to high and low latitude forcing
Four fully coupled climate models, CESM1, CanESM2, CNRM-CM5 and GFDL-CM3Z are used to isolate the impact of Arctic sea ice loss on the atmosphere. In all models, Arctic sea ice is melted in isolation from the effects of external radiative forcing. However the method through which this melting is achieved, as well as the radiative forcing protocol, differs between the sets of experiments. Nonetheless, several aspects of the wintertime response are remarkably robust. Arctic sea ice loss in coupled models produces warming that is strongest over the Arctic Ocean and high latitude land masses alongside a weak cooling over eastern Eurasia, a dipole pattern in sea level pressure with lower pressure over North America and higher pressure over Eurasia, a strengthening of 850 hPa zonal winds in mid-latitudes along with a weakening on the poleward side, and an increase in precipitation over northern high latitudes. Because there are different amounts of warming at lower latitudes between the models, a pattern scaling approach is used to separate out the part of the pattern that scales with low-latitude warming and the part that scales with sea ice loss. The similarity in the part that scales with sea ice loss remains after applying pattern scaling, but the part of the pattern that scales with low-latitude warming is model-dependent.
Nov. 3, 2017
Evaluating GPP and respiration estimates over northern mid-latitude ecosystems using solar induced fluorescence and atmospheric CO2 measurements
Oct. 13, 2017
Remote Sensing of NH3 from Satellite and Ground-based Instruments
Oct. 20, 2017
Understanding the variability and sources of moisture for precipitation in mainland southeast Asia from seasonal to interannual time scales
Oct. 27, 2017
Measuring Wildfire Plumes in the Arctic using a Network of Ground-based FTIR spectrometers
Oct. 6, 2017
Seeing the Ocean Through Sea Ice: Signatures of Submesoscale Ocean Flows in Sea Ice patterns in Marginal Ice Zones
March 24, 2017
Spectral analysis of large-scale meteorological patterns preceding summer ozone episodes and heat waves in North America
March 24, 2017
The influence of curvature extremes on convection in a fluid featuring a temperature dependent viscosity: implications for modelling small spherical bodies
March 31, 2017
How well can polar middle atmosphere descent rates be derived from remote sounding measurements?
March 31, 2017
High-resolution Seismic Modeling of the Core-mantle Boundary Region Based on Hybrid Methods: Preliminary Results
April 7, 2017
Detecting the Transport of Wildfire Emissions to the Arctic using a Network of Ground-based FTIR Spectrometers
April 7, 2017
Variable-Resolution model: an alternative way to solve the dilemma of high-resolution modeling
March 17, 2017
Exploring Lake effects on regional climate using coupled climate model with artificial lake bathymetry
March 3, 2017
Transport errors in GEOS-Chem model and their impact on methane simulation
March 17, 2017
Combining experimental spectra and density functional theory for improved global warming potential calculations
Feb. 24, 2017
Satellite validation of CFCs over the High Arctic
Feb. 3, 2017
Global Trends in Water Vapour
Abstract: Stratospheric water vapour is an important greenhouse gas subject to a positive feedback cycle with surface temperature. Work has been done over the last two decades to characterize its behaviour in the stratosphere, and while general consensus shows that stratospheric water vapour is increasing, the majority of studies come to this conclusion using observations from a single area and generalizing over the globe. While this works for well mixed gases, such as carbon dioxide, water vapour displays distinct patterns across the globe. In this talk I will illustrate an alternate approach, using data collected by ACE-FTS and fitting discrete regions across the globe, in an attempt to generate a more comprehensive view of stratospheric water vapour trends.
Feb. 3, 2017
Characterizing dispersion due to moisture using multi-pole Debye model
Abstract: Ground penetrating radar (GPR) is a nondestructive measurement technique that utilizes electromagnetic waves to locate targets beneath the surface. The speed of EM waves is determined by dielectric permittivity, which is often assumed to be constant within a homogeneous material. However, dielectric permittivities in real materials vary with frequency. This phenomenon, called dispersion, affects the interpretation of GPR signals. Dispersion becomes stronger with increasing moisture content in materials due to the dipolar nature of water molecules. The goal of this work is to isolate the dispersion caused by water from the dispersion inherent to material. We measure the complex permittivities of samples from a massive sulphide mine under both ambient and dry conditions. The measurements are fitted to a 2-pole and a 3-pole Debye model. Results show that dry samples can be fitted well with 2-pole model while the ambient samples require an additional pole. The relaxation time of the additional pole in ambient samples does not match to that of pure water and further experimentation with higher moisture content is needed.
Feb. 10, 2017
Modelling urban anthropogenic 12CO2 and 13CO2 in the Greater Toronto Area
Even in urbanized regions, carbon dioxide (CO2) emissions are derived from a variety of biogenic and anthropogenic sources and are influenced by atmospheric transport across borders. As policies are introduced to reduce the emissions of CO2, there is a need for independent verification of emissions reporting. In this work, we use carbon isotope (12CO2 and 13CO2) simulations in combination with atmospheric measurements to distinguish between CO2 sources in the Greater Toronto Area (GTA). This is being done by developing an urban δ13C framework based on CO2 emissions data and forward modelling. We developed the UofT/ECCC inventory, a CO2 inventory for southern Ontario at a very fine spatial and temporal resolution (0.02ox0.02o and hourly, respectively). The inventory is run with the GEM-MACH chemistry transport model and results are used in our framework in combination with region-specific δ13C signatures of the dominant CO2 sources; the product is compared against highly accurate 13CO2 and 12CO2 ambient data made at sites across southern Ontario. The strength of this framework is its potential to estimate contributions of both locally-produced and regionally-transported CO­2. Locally, anthropogenic CO­2 in urban areas is often derived from natural gas combustion (for heating) and gasoline/diesel combustion (for transportation); the isotopic signatures of these processes were measured to be significantly different (approximately d13CVPDB = -44 ‰ and -28 ‰ respectively) in the GTA and can be used to infer their relative contributions. Utilizing our δ13C framework and differences in sectoral isotopic signatures, we quantify the relative contribution of CO2 sources on the overall measured concentration and assess the ability of this framework as a tool for tracing the evolution of sector-specific emissions.
Feb. 17, 2017
Influence of Midlatitude Thermal Anomalies on the Circulation of an Idealized Moist Model
Jan. 27, 2017
2016: A Stratospheric HCN Oddity
Last year, an unprecedented amount of hydrogen cyanide (HCN) was emitted from Southeast Asia into the upper troposphere and lower stratosphere.
Nov. 18, 2016
Thermohaline Instability and the Formation of North Atlantic Super Polynyas during the Glacial
Climate variability recorded in Greenland ice cores over the past 100,000 years is interspersed by a number of rapid warming events. Each warming event is approximately 10 to 15 degrees C in annual average temperature at summit Greenland. Each of these events in the climate record is also estimated to have occurred in less than a couple of decades. A modelling simulation of the glacial climate with a fully coupled climate model reveals that the initial warming event is triggered by thermohaline instability under a North Atlantic covered by sea ice. The initial instability is characterized by the formation of a wintertime glacial super polynya at the beginning of each warming event. Afterwards, the resumption of the Atlantic Meridional Overturning Circulation (AMOC) from a reduced state occurs within a couple of decades. I will describe some of the interesting physics underlying the instability.
Oct. 28, 2016
Quantifying emissions of CO and NOx using observations from MOPITT, OMI, TES, and OSIRIS
We use the GEOS-Chem four-dimensional variational (4D-var) data assimilation with satellite observations of multiple chemical species to estimate emissions of CO and NOx, as well as the tropospheric concentrations of O3. In doing so, we utilize CO retrievals from The Measurements of Pollution In The Troposphere (MOPITT), O3 retrievals from the Tropospheric Emission Spectrometer (TES), O3 retrievals from the Optical Spectrograph and InfraRed Imager System (OSIRIS), and NO2 columns from the Ozone Monitoring Instrument (OMI). By integrating these data in the 4D-Var scheme, we obtain a chemical state in the model that is consistent with all of the data over the assimilation period. In this context, for example, we find that combining TES and OSIRIS improves O3, particularly in the tropical upper troposphere (by 10-20%), which leads to a reduction in the uncertainty of the NOx emission estimates. However, although assimilating multiple chemical species provides a stronger constraint on the chemical, state, there are still large uncertainties on the CO and NOx emission estimates, due to the dependence of the results on the selection of the assimilation window and how the datasets are weighted in the cost function.
Nov. 4, 2016
40 years of atmospheric methane FTIR observations from a remote European site
Observation of solar radiation in the infrared have been performed since the mid-fifties at the International Scientific Station of the Jungfraujoch (ISSJ, Swiss Alps, 46.5°N, 8.0°E, 3580 m a.s.l.), in the framework of the Network for Detection of Atmospheric Change (NDACC,<>). Systematic monitoring of the chemical composition of the Earth's atmosphere started in 1984 by using two state-of-the‐art Fourier Transform InfraRed (FTIR) instruments, while grating spectrometers were used previously in the early 1950s, and from the mid-1970s onwards, covering 40 years of quasi-continuous solar observations. In this framework, I will discuss optimization of retrieval strategies from infrared solar observations and methane trend analysis.
Oct. 14, 2016
Polar Low Induced Surface Ozone and HDO Depletion
Ground-based and satellite datasets were used to identify two similar polar low induced surface ozone depletion events in Eureka, Canada on March 2007 and April 2011. These two events coincident with observations of depleted HDO, indicate the condensation process during the transportation of the ozone depleted airmass. Lidar and radar measured the ice clouds and aerosol when the ozone and HDO depleted airmass arrived in Eureka. Two global chemical-climate models were used to simulate the surface ozone depletion. A global reanalysis model data and a particle dispersion model were used in this work to study the link between the ozone and HDO depletion. Observational and modelled data show these events have the distinctive feature of coincident of the strong tropospheric cyclone and intensified stratospheric vortex.
Oct. 7, 2016
Why are upward EP-flux and temperature positively skewed in the stratosphere?
Polar stratospheric temperatures are positively skewed, with a typical value of skewness of 0.64 in Northern Hemisphere winter, an asymmetry that determines the character of ozone climate coupling and stratosphere-troposphere interactions. This skewness is often attributed to the fact that temperatures are bounded from below by a radiative limit while dynamical wave-driven events like sudden stratospheric warmings can cause significantly larger positive anomalies. In this talk, I will examine the positive skewness of upward wave activity flux itself as a driver of the temperature distribution. I will use the ideas of linear interference to explain the positive skewness of upward wave activity flux. In particular, I will show that a nonlinear relationship between the two terms that make up the heat flux anomaly can be used to explain its positive skewness. Finally, by using a toy statistical model of wave interference in the lower stratosphere, and I will show that the westward tilt of the climatological wave is the key ingredient to obtaining a positively skewed upward wave activity flux distribution.
Oct. 7, 2016
The atmospheric response to extratropical ocean warming induced by sea ice loss
Sea ice loss impacts the atmosphere by altering the surface energy balance, warming the Arctic lower troposphere, and potentially changing the large scale atmospheric circulation at mid-latitudes. A large number of studies have carried out numerical modeling experiments to isolate the atmospheric impacts of sea ice loss from other effects. These typically use an Atmospheric General Circulation Model (AGCM) forced with reduced sea ice concentrations while keeping sea surface temperatures and other forcings fixed. As the ocean cannot respond, these experiments ignore potentially important thermodynamic and dynamical feedbacks with the ocean. In this talk, I will examine the impact extratropical ocean warming caused by sea ice loss has on the atmosphere using both coupled ocean-atmosphere climate model and AGCM experiments. I will show that the extratropical ocean warming amplifies the atmospheric circulation response to sea ice loss, suggesting that previous studies using only AGCM experiments may underestimate the response.
Oct. 14, 2016
Using space-based chlorophyll fluorescence and CO2 observations to constrain primary production and respiration about the boreal ecosystems
Sun-induced chlorophyll fluorescence (SIF), radiation emitted by vegetation during photosynthesis, has long been known to be a good proxy for primary productivity. However, only within the last few years have high-resolution space-based spectrometers allowed global observations of SIF. In this talk, I will examine how SIF observations from the GOME-2 satellite compare with primary productivity estimates from terrestrial ecosystem models. I will then introduce a method to combine space-based SIF observations with atmospheric CO2 observations to constrain both primary productivity and respiration in boreal terrestrial ecosystems.
Sept. 30, 2016
The mid-Pliocene CESM1 climatology
A very interesting time-period in the recent past is the mid-Pliocene (~3 Millions years ago). The configuration of the world looked much the same as today, CO2 was likely less than present day, but still the temperatures were much warmer and sea-level ~15-20m higher. If it is possible for the earth system to have such an extreme response to greenhouse gas concentrations no different from today’s, then it raises questions about the level of faith that can be put into climate model projections of only ~1 m of sea-level rise by the end of this century.
March 18, 2016
NO2 Limb Retrieval in the Upper Troposphere/ Lower Stratosphere Region
Feb. 19, 2016
A new characterization of the turbulent diapycnal diffusivities of mass and momentum in the ocean
Feb. 19, 2016
Hybrid method: high-resolution imaging in lower mantle region
Feb. 26, 2016
Reassessing the Ancient Martian Ocean Hypothesis using Global Distribution of Valley Networks
Feb. 5, 2016
Planetary surface mobility and the effect of core size, viscosity contrast and internal heating rate
Feb. 5, 2016
Detection of NH3 emissions in the Canadian Arctic from the 2014 Northwest Territories Fires
Jan. 29, 2016
A How-to on Modifying CESM Conditions to Implement Interesting Experiments
Dec. 11, 2015
Topographic Enhancement of Vertical Mixing in the Southern Ocean
Jan. 22, 2016
Quantifying CH4 emissions: from global to local scales
Nov. 13, 2015
What mechanism enables intermediate depth earthquakes? - Insights from seismic imaging and modeling
Nov. 20, 2015
All that noise… can I find meaning? Passive seismic monitoring in an active mine, 2km down.
Nov. 20, 2015
Measuring O2 spectral line parameters to support atmospheric remote sensing
Nov. 27, 2015
The Role of Aerosols and the Challenges faced in their Measurement
Nov. 6, 2015
Near-surface ozone depletion in the Arctic spring affected by the Northern-Hemispheric climate variability
Nov. 6, 2015
Separating sea ice from low latitude ocean influences in the atmospheric response to greenhouse gas forcing
Oct. 30, 2015
Sensitivity of atmospheric CO2 observation to terrestrial sources and sinks
Oct. 30, 2015
The Effect of Temperature, Stress and Depth-dependent Viscosity on Surface Mobility
Oct. 23, 2015
Assessing trends in MIPAS stratospheric ozone - possible pitfalls and how to deal with them
Oct. 23, 2015
Investigations into the transient response of the polar mid-troposphere to mid-latitude surface heating
Oct. 16, 2015
The Unsolved Mysteries of Mantle Convection
Sept. 25, 2015
Challenges and advantages of balloon borne measurements
Sept. 25, 2015
Utility of dispersion measurement for ground penetrating radar
Oct. 2, 2015
Rapid Climate Change within the Millennial Scale Climate Variability of the Last Ice Age.
Oct. 9, 2015
Multi-scale finite-frequency tomography of southern Alaska
Oct. 9, 2015
A standing-travelling wave decomposition of the atmospheric circulation during recent North American winters
March 20, 2015
Effective Model for 1D transversely isotropic hydraulic fracturing models
March 27, 2015
Mapping the Transition to the Stagnant-lid Regime in Variable Core Size Spherical Shell Convection with a Temperature-dependent Viscosity
March 27, 2015
Cross-validation of methane retrievals from ACE-FTS, GOSAT, and ground-based solar absorption measurements, at Eureka, Nunavut.
March 20, 2015
Holocene relative sea level evolution and constraints on glacial isostatic adjustment models: An overview
March 6, 2015
Double-diffusive effects on sea ice in a warming ocean
March 6, 2015
Measuring Methane using a ground-based FTIR spectrometer in the Arctic
Feb. 27, 2015
Atmospheric outliers: the good, the bad, and the ugly
Feb. 27, 2015
FTIR Measurements of Biomass Burning Species in the Arctic
Jan. 30, 2015
Measuring atmospheric methane and constraining its regional emissions
Feb. 6, 2015
The propagation of Seismic Waves in a Deep Mine
Feb. 6, 2015
Laboratory Spectroscopy for Atmospheric Studies
Feb. 13, 2015
Ice Dynamical Implications of the ICE-6G_C (VM5a) Reconstructions of Glaciation on Greenland and Antarctica
Feb. 20, 2015
Jan. 16, 2015
Stratosphere-troposphere coupling: standing waves drive persistent anomalies of upward wave activity flux
Jan. 23, 2015
Projected Changes in Precipitation Extremes over Western Canada
Jan. 23, 2015
Assessment of ACE-FTS H20 isotopologue amounts
Nov. 28, 2014
Reconstructing Pliocene coastlines, topography and bathymetry: A geodynamic perspective
Nov. 21, 2014
(Atmospheric Physics) TBA
Nov. 21, 2014
A One-Degree Seismic Tomographic Model Based on a Sensitivity Kernel Database
Oct. 31, 2014
The Search for Stably Stratified Layers in Jovian Planets: from Saturn to the ice giants
Oct. 17, 2014
Equatorial balance model and data assimilation
Oct. 3, 2014
Does External Forcing Interfere with the AMOC's influence on North Atlantic Sea Surface Temperature?
April 4, 2014
Lake mixing in the western Arctic: a climatology of mixing events and their synoptic-scale controls
March 7, 2014
New ozone retrievals above Kiruna from KIMRA and MIRA 2
March 7, 2014
Glacial Isostatic Adjustment, Mantle Viscosity and the Last Ice Age: An Overview
Feb. 28, 2014
The climate response to sudden summertime sea ice loss in a coupled ocean-atmosphere model
Feb. 7, 2014
Turbulent stratified shear flows: mixing in the abyssal ocean
Jan. 24, 2014
Exploring an Electrically Conducting Lowermost Mantle as a Mechanism for the Non-Uniform Geomagnetic Secular Variation over the Surface of the Earth
Jan. 31, 2014
Measuring CO2 using a ground-based FTIR spectrometer
Jan. 31, 2014
Standing wave contributions to the linear interference effect in stratosphere-troposphere coupling
Feb. 14, 2014
The Red Planet of Love
Feb. 14, 2014
Could midlatitude moisture be driving the Arctic midtropospheric amplification of warming?
Nov. 22, 2013
Characterizing the Variability of Stratosphere-Troposphere Exchange in the Upper Troposphere/Lower Stratosphere
Nov. 22, 2013
The Interaction Between Tectonic Plates and Deep Dense Compositional Piles in Numerical Models of Mantle Convection
Nov. 29, 2013
Toronto air pollution - who can we blame?
Jan. 10, 2014
Jan. 17, 2014
Expanding our understanding of atmospheric water vapour in the High Arctic
Jan. 17, 2014
Actually capturing the seismic wavefield in underground mines. Why is this not as simple as one would think?
Nov. 15, 2013
Using ACE-FTS to explore the upper troposphere and lower stratosphere
Nov. 8, 2013
Earthquake Source Inversions Based upon Adjoint Methods
Nov. 1, 2013
Weak-Constraint 4D-Var in Chemical Data Assimilation
Oct. 25, 2013
How to Generate a Lunar Dynamo: Core Dynamics Modelling with Mechanically-Driven Flow
Oct. 4, 2013
PARIS – not just a French city
Oct. 4, 2013
Tectonic imprints upon inferences of eustatic sea level history: the Pliocene warm period and the Orangeburg Scarp
Oct. 11, 2013
Atmospheric Applications of Laboratory Spectroscopy
Oct. 11, 2013
Interpreting Observed Northern Hemisphere Snow Trends with Large Ensembles of Climate Simulations
Oct. 25, 2013
Sahel Precipitation - Examining regional teleconnections across Asia and the Indian Ocean
Sept. 20, 2013
The mesosphere and me: OH, how low can you go?
Sept. 20, 2013
Mantle convection and me: modelling methods are important
Sept. 27, 2013
Diabatic balance model for the equatorial atmosphere
Sept. 13, 2013
Radiance and Trace Gas Measurements in Canada’s Harshest Environment
April 5, 2013
Trace Gas Measurements in Eureka by UV-visible Spectrometer
March 22, 2013
Global Seismic Tomography using a Sensitivity Kernel Database
March 8, 2013
Seeking a mechanistic understanding of the linear interference effect in stratosphere-troposphere coupling
March 22, 2013
Measuring Toronto Air Pollution with FTIR
Feb. 15, 2013
Ocean Tides: From physical importance to numerical modelling
March 1, 2013
The stratospheric response to Arctic sea ice loss
Feb. 1, 2013
Preparing to send an ACE-like FTS to Mars
Feb. 8, 2013
The Propagation of Seismic Waves in the Presence of Strong Elastic Property Contrasts
Feb. 8, 2013
Kraichnan-Leith-Batchelor phenomenology in two-dimensional inverse energy cascades
Feb. 1, 2013
Even More Mantle Convection: Predicting Topography and its Time-Rate of Change
Jan. 25, 2013
Journey to the Centre of a Terrestrial Exoplanet: The effect of lower mantle metallization on planetary magnetic field generation
Jan. 11, 2013
Water vapour measurements at Eureka
Jan. 18, 2013
Western African precipitation dynamics and sea surface temperatures
Jan. 18, 2013
Glacial isostatic adjustment, mantle viscosity and global change: An overview
Nov. 23, 2012
The atmospheric controls on lake mixing in the western Arctic
Nov. 23, 2012
A Prototype Interferometer in the Arctic: Birth, Death, Resurrection, and Measurements
Nov. 9, 2012
Episode VI: Return of the Mantle
Nov. 16, 2012
Characterization of Episodic Internal Turbulence Mixing in the Stratified Lake
Nov. 16, 2012
Dynamical Downscaling of Precipitation Forecasts over Western Canada
Nov. 2, 2012
Microwaves: Why they are really useful
Nov. 2, 2012
More Mantle Convection: Compositional Variations Above the Core-Mantle Boundary
Oct. 19, 2012
Equatorial balance model
Oct. 26, 2012
Should we care about supercontinent thermal insulation as a mechanism for mantle reversals?
Oct. 26, 2012
Does anyone care about the mesosphere?
Oct. 12, 2012
Boreal fire in Northwestern Ontario - Characterization using remote sensing measurements and model simulations
Oct. 5, 2012
Documenting the development of a new 3D thermal convection model: Part 1 - Motivation and Design Principles
Oct. 5, 2012
Regional data assimilation of multi-spectral MOPITT observations of CO over North America
Oct. 12, 2012
How to Build a Planet: 1-D Interior Structure Models of Water Worlds
Sept. 21, 2012
Characterizing the Variability of Stratosphere-Troposphere Exchange in the Upper Troposphere/Lower Stratosphere
Sept. 21, 2012
Does the inner core conductivity matter while modeling planetary dynamos?
Sept. 28, 2012
Remote Sensing of Atmospheric CO2 at Eureka
March 2, 2012
Turbulence transition and mixing in stratified shear layers
March 2, 2012
Turbulence transition and mixing in stratified shear layers
Sept. 23, 2011
Glacial Isostatic Adjustment, Earth Rotation and Climate Change: how does it all fit together?
Sept. 23, 2011
Glacial Isostatic Adjustment, Earth Rotation and Climate Change: how does it all fit together?
Event series  Brewer-Wilson Seminar Series