Micrometeorological Variables and Atmospheric Dispersion Modeling in Two Climate Regions of Quebec

– By Richard Leduc, Ph.D., AirMet Science Inc., and Jean-François Brière, Ministère de l’Environnement et de la Lutte contre les changements climatiques

The US-EPA (2019a) AERMOD dispersion model is widely used to assess the concentration of contaminants in ambient air as a result of emissions from a source. To this end, AERMOD requires micrometeorological variables characterizing turbulence (u*, w*, L, zic, zim); they are calculated by the AERMET module and obtained using local surface and upper air data (wind, temperature and cloud opacity),

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2020 Arctic Summer Seasonal Climate Outlook for Sea-Ice

– By contributors from Environment and Climate Change Canada, the University of Québec at Montréal, the Arctic and Antarctic Research Institute, the Hydrometeorological Centre of Russia, The Norwegian Meteorological Institute, Finnish Meteorological Institute, World Meteorological Organization, Climate Prediction Center, and National Oceanic and Atmospheric Administration –

Arctic Climate Forum Consensus Statement (Continued)

Highlights

Warmer than normal surface air temperatures over Eurasia and the Arctic Ocean contributed to below to near normal ice conditions during the 2019-2020 winter across the entire Arctic.

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2020 Arctic Summer Seasonal Climate Outlook for Temperature and Precipitation

– By contributors from Environment and Climate Change Canada, the Arctic and Antarctic Research Institute, the Hydrometeorological Centre of Russia, The Norwegian Meteorological Institute, Finnish Meteorological Institute, World Meteorological Organization, Climate Prediction Center, and National Oceanic and Atmospheric Administration –

Arctic Climate Forum Consensus Statement

And Summary of the 2020 Arctic Winter Season

CONTEXT

Arctic temperatures continue to warm at more than twice the global mean. Annual surface air temperatures over the last 4 years (2016–2019) in the Arctic (60°–85°N) have been the highest in the time series of observations for 1936-2019.

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skyscraper view of traffic lights and Vancouver tower

Air Pollution in the Time of COVID-19

– By D.G. Steyn, Department of Earth, Ocean and Atmospheric Sciences, The University of British Columbia, Vancouver, B.C., and Kyle Howe, Air Quality and Climate Change, Metro Vancouver Regional District, Burnaby, B.C. –

The COVID-19 pandemic is disrupting many aspects of society globally, nationally and locally. The most direct effect is the human health tragedy of increased morbidity and mortality caused by the disease. Beyond that, the legislated curtailment of human movement to slow the spread of the virus has resulted in economies being placed in what has been called a “medically induced coma”. Closely associated with the sharp slowdown in economic activity has been the reduction in fossil fuel consumption from most source sectors.

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In My Opinion: On greed, power and making the weather

– By Phil Chadwick, Meteorologist and Eco-Artist –

I figure if one is going to have an opinion about climate change, it had better be an informed opinion. I thought I was well informed but there is always something to learn too. The Weather Makers by Tim Flannery was published in 2005 just after Hurricane Katrina. Fifteen years later not much has changed – the politicians continue to dither.

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A Message from the
Incoming CMOS Bulletin Editor, Nicole Renaud

Hello from Edmonton and Treaty 6 territory, traditional lands of First Nations and Métis people. I am thrilled to be joining the CMOS team as the new Bulletin Editor! My passion for the environment has been a life long build up, with my interest in water security emerging while I lived in Mexico’s Sonoran desert, in the Baja peninsula. While there, I saw locals unable to afford water contrasted against empty golf courses outside of tourist season being draped in water.

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Message from the CMOS President: Welcoming in a Decade for Climate Action

– By Kimberly Strong, CMOS President and Professor & Chair, Department of Physics, University of Toronto –

As 2019 ends and we welcome 2020, we have an opportunity to reflect on some of the events of the last year and where we are heading in the year to come, particularly on the topic of climate change, which has been front and centre in the news all year. Progress on climate action this past year was frustratingly slow for many, particularly given the disagreement at the December COP25 Conference in Madrid,

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Arctic Regional Climate Centre Consensus Statement: TEMPERATURE

– By Gabrielle Gascon1, Katherine Wilson1, Marko Markovic1*, Adrienne Tivy1, Bill Appleby1, Vasily Smolyanitsky2, Valentina Khan3, Helge Tangen4, Eivind Stoylen4, Lene Ostvand4, Johanna Ekman5, Arun Kumar6 and Shanna Combley6

2019 Arctic Summer Seasonal Summary and 2019-2020 Arctic Winter Seasonal Outlook for Temperature

Arctic temperatures continue to warm at more than twice the global mean. Annual surface air temperatures over the last 4 years (2014-2018) in the Arctic have been the highest on record since 1900.

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