Author: CMOS Bulletin SCMO

A Note on ECCC Radar Snowfall Estimates and Radar Data

Diar Hassan (Wood PLC, Ottawa ON), George Isaac (Weather Impacts Consulting Inc., Barrie ON), Peter Taylor (York University, Toronto ON), Daniel Michelson (Environment and Climate Change Canada – ECCC), and Norman Donaldson (ECCC).

It often snows in Newfoundland but on 17 January 2020, it was a little extreme (Figure 1). METAR reports from St John’s airport, CYYT, indicated 35 cm of snow fell between 1200-1800 UTC and another 19 cm in the next 6 hours. These snowfall depth measurements are consistent with many others in the area.

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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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Kimberly Strong Hands Over CMOS Presidency to Marek Stastna

Dear CMOS Friends and Colleagues,

June marks the end of my year as CMOS President. It has been an honour to serve in this role, which has been both eventful and rewarding, particularly over the last several months. I sincerely thank CMOS staff, Council, Executive, Centre Chairs, and Committee Chairs and members, for their support and for all their contributions to CMOS over the past year.

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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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New CMOS President: Marek Stastna

New CMOS President: Marek Stastna

middle aged Caucasian man with parted brown hair and glasses outside smiling at camera
CMOS President, Marek Stastna

During the June 23, 2020 54th Annual General Meeting, CMOS welcomed its new incoming President, Marek Stastna. Marek received his PhD in Applied Mathematics from the University of Waterloo in 2001. After three years as a Postdoctoral Fellow in the Atmospheric Physics group at the University of Toronto, Marek returned to the University of Waterloo where he is presently a Professor of Applied Mathematics.

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Ontario’s Coldest Temperature Re-Visited: Setting the Record Straight

– By Bryan Smith –

How accurate are Canada’s weather records? The case of Ontario’s all-time record low temperature casts some doubt.

Canadians have free access to one of the most extensive climate databases in the world with data going back to 1840. However, despite efforts to quality-assure this data, suspicious values emerge from time to time among the millions of archived observations. The reasons for the occurrence of inaccurate data are numerous,

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CMOS Recognizes 2020 Awards Winners at Virtual Congress

OTTAWA, June 12, 2020/ As part of its Alternative Congress and leading up to its Annual General Meeting (AGM), the Canadian Meteorological and Oceanographic Society (CMOS.ca) is pleased to announce that ten Canadian scientists, scholars, and researchers have been recognized for their outstanding achievements in advancing knowledge and understanding in the fields of atmospheric sciences, hydrology, meteorology and oceanography.

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