A5035374502- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Astrophysics and Star Formation Studies
- Climate variability and models
- Climate Change and Geoengineering
- Astro and Planetary Science
- Methane Hydrates and Related Phenomena
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Hydrology and Watershed Management Studies
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Atmospheric chemistry and aerosols
- Peatlands and Wetlands Ecology
- Climate change and permafrost
- High-pressure geophysics and materials
- Cosmology and Gravitation Theories
- Plant Water Relations and Carbon Dynamics
- Hydrology and Sediment Transport Processes
- Atomic and Molecular Physics
- Hydrocarbon exploration and reservoir analysis
- Tree-ring climate responses
- Solar and Space Plasma Dynamics
- Wind Energy Research and Development
- Arctic and Antarctic ice dynamics
University of Victoria
2013-2025
Pacific Institute for Climate Solutions
2017-2024
China Meteorological Administration
2018
Environment and Climate Change Canada
2009-2012
University of Waterloo
2000-2007
Metric Systems Corporation (United States)
2005
Western University
2000-2002
University of California, Berkeley
2000
American Meteorological Society
1999-2000
University of Washington
1999-2000
Abstract. Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Atmospheric emissions concentrations of CH4 continue increase, making second most human-influenced greenhouse gas in terms forcing, after carbon dioxide (CO2). The relative importance compared CO2 depends on its shorter atmospheric lifetime, stronger warming potential, variations growth rate over past decade, causes which are still debated. Two...
Abstract. The global methane (CH4) budget is becoming an increasingly important component for managing realistic pathways to mitigate climate change. This relevance, due a shorter atmospheric lifetime and stronger warming potential than carbon dioxide, challenged by the still unexplained changes of CH4 over past decade. Emissions concentrations are continuing increase, making second most human-induced greenhouse gas after dioxide. Two major difficulties in reducing uncertainties come from...
[1] The hydrological impact of enhancing Earth's albedo by solar radiation management is investigated using simulations from 12 Earth System models contributing to the Geoengineering Model Intercomparison Project (GeoMIP). We contrast an idealized experiment, G1, where global mean radiative forcing kept at preindustrial conditions reducing insolation while CO2 concentration quadrupled a 4×CO2 experiment. reduction evapotranspiration over land with instantaneously increasing concentrations in...
Abstract Solar geoengineering—deliberate reduction in the amount of solar radiation retained by Earth—has been proposed as a means counteracting some climatic effects anthropogenic greenhouse gas emissions. We present results from Experiment G1 Geoengineering Model Intercomparison Project, which 12 climate models have simulated response to an abrupt quadrupling CO 2 preindustrial concentrations brought into radiative balance via globally uniform insolation. Models show this largely offsets...
A simple scheme for the soil consumption of atmospheric methane, based on an exact solution one‐dimensional diffusion‐reaction equation in near‐surface layer, is described. The model includes a parameterization biological oxidation that sensitive to temperature, moisture content, and land cultivation fraction. was incorporated Canadian Land Surface Scheme (CLASS), with forcing provided by 21‐a, global meteorological data set, calibrated using multiyear field measurements. Application scale...
Abstract The simulation of atmospheric–land–ocean CO2 exchange for the 1850–2000 period offers possibility testing and calibrating carbon budget in earth system models by comparing simulated changes atmospheric concentration land ocean uptake with observation-based information. In particular, some uncertainties associated treatment use change (LUC) role down regulation affecting strength fertilization terrestrial photosynthesis are assessed using Canadian Centre Climate Modelling Analysis...
We have examined changes in climate which result from the sudden termination of geoengineering after 50 years offsetting a 1% per annum increase CO 2 concentrations by reduction solar radiation, as simulated 11 different models experiment G2 Geoengineering Model Intercomparison Project. The agree on rapid global‐mean temperature following accompanied increases precipitation rate and decreases sea‐ice cover. There is no agreement impact change plant net primary productivity. considerable...
Global-scale solar geoengineering is the deliberate modification of climate system to offset some amount anthropogenic change by reducing incident radiation at surface. These changes planetary energy budget result in differential regional effects. For first time, we quantitatively evaluate potential for disparities a multi-model context using results from model experiment that offsets forcing quadrupling CO2 via reduction irradiance. We temperature and precipitation 22 geographic regions...
Temperature and precipitation extremes are examined in the Geoengineering Model Intercomparison Project experiment G1 , wherein an instantaneous quadrupling of CO 2 from its preindustrial control value is offset by a commensurate reduction solar irradiance. Compared to climate, changes climate under generally much smaller than 4 × alone. However, it also case that temperature differ significantly those conditions. Probability density functions standardized anomalies monthly surface exhibit...
Context.Molecular oxygen, O2, has been expected historically to be an abundant component of the chemical species in molecular clouds and, as such, important coolant dense interstellar medium. However, a number attempts from both ground and space have failed detect O2 emission.
The preindustrial carbon cycle is described for the Canadian Centre Climate Modelling and Analysis Earth system model (CanESM1). interhemispheric gradient of surface atmospheric CO 2 concentration (xCO ) reversed from present day, with higher concentrations in Southern Hemisphere, southward transport by ocean, estimated at 0.38 Pg C yr −1 . seasonal cycles xCO exchange are dominated Northern Hemisphere terrestrial processes; ocean contribution to flux phase larger tropics out extratropics....
Abstract Geoengineering via solar radiation management could affect agricultural productivity due to changes in temperature, precipitation, and radiation. To study rice maize production China, we used results from 10 climate models participating the Model Intercomparison Project (GeoMIP) G2 scenario force Decision Support System for Agrotechnology Transfer (DSSAT) crop model. prescribes an insolation reduction balance a 1% −1 increase CO 2 concentration (1pctCO2) 50 years. We first evaluated...
Abstract. We examine extreme temperature and precipitation under two potential geoengineering methods forming part of the Geoengineering Model Intercomparison Project (GeoMIP). The solar dimming experiment G1 is designed to completely offset global mean radiative forcing due a CO2-quadrupling (abrupt4 × CO2), while in GeoMIP G4, representative concentration pathway 4.5 (RCP4.5) scenario partly by simulated layer aerosols stratosphere. Both G4 simulations lead lower minimum temperatures (TNn)...
Abstract Snow‐dominated watersheds are bellwethers of climate change. Hydroclimate projections in such basins often find reductions annual peak runoff due to decreased snowpack under global warming. British Columbia's Fraser River Basin (FRB) is a large, nival basin with exposure moisture‐laden atmospheric rivers originating the Pacific Ocean. Landfalling over region winter projected increase both strength and frequency Coupled Model Intercomparison Project Phase 5 models. We investigate...
Abstract Canada‐wide, statistically downscaled simulations of global climate models from the Sixth Coupled Model Inter‐comparison Project (CMIP6) have been made available for 26 using a new multivariate approach and an improved observational target dataset. These scenarios comprise daily precipitation, maximum temperature, minimum temperature at 1/12 ° resolution across Canada. Simulations each span historical period (1950–2014), three future Shared Socio‐economic Pathways (SSPs)...
For the first time, a search has been conducted in our Galaxy for 119 GHz transition connecting to ground state of O2, using Odin satellite. Equipped with sensitive 3 mm receiver ( K), reached unprecedented upper limits on abundance especially cold dark clouds where excited levels involved 487 are not expected be significantly populated. Here we report dozen sources. In improve upon published SWAS by more than an order magnitude, reaching N(O2)/N(H half While standard chemical models...
Projections for forest disturbance and damage under a changing climate in British Columbia are summarized, with the objective of collating regionally specific expectations so that land managers can take pro-active steps to avoid or adapt changes expected. While some projections based on extrapolations recent multi-decadal trends, most global models (GCMs) must make assumptions about range CO2 emissions status atmospheric greenhouse gas over next century. Regardless emission scenarios, it is...
Abstract. Understanding and quantifying the global methane (CH4) budget is important for assessing realistic pathways to mitigate climate change. Atmospheric emissions concentrations of CH4 are continuing increase, making second most human-influenced greenhouse gas in terms forcing, after carbon dioxide (CO2). Assessing relative importance comparison CO2 complicated by its shorter atmospheric lifetime, stronger warming potential, growth rate variations over past decade, causes which still...
Abstract. In response to ongoing and future-projected global warming, mid-latitude, nival river basins are expected transition from a snowmelt-dominated flow regime nival–pluvial one with an earlier spring freshet of reduced magnitude. There is, however, rich variation in responses that depends on factors such as the topographic complexity basin strength maritime influences. We illustrate potential effects strong influence by studying future changes cold season variability Fraser River Basin...
Recent studies have identified stronger warming in the latest generation of climate model simulations globally, and same is true for projected changes Canada. This study examines differences Canada six sub-regions between from Sixth Coupled Model Intercomparison Project (CMIP6) its predecessor CMIP5. Ensembles both experiments are assessed using a set derived indices calculated daily precipitation temperature, with projections compared at fixed future time intervals levels global temperature...
Abstract. A recently developed model for the consumption of atmospheric methane by soil (Curry, 2007) is used to investigate global magnitude and distribution uptake in a simulated future climate. In addition solving one-dimensional diffusion-reaction equation, includes parameterization biological CH4 oxidation that sensitive temperature moisture content, along with specified reduction factors land cultivation wetland fractional coverage. Under SRES emission scenario A1B, projects an 8%...