Richard Leduc Archives - CMOS BULLETIN SCMO

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

Written on July 27, 2020.

– 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),

Cover of CMOS Bulletin Vol.47 No.5 shows a darkened Toronto skyline with lightening streaking across the sky

CMOS Bulletin SCMO
Vol.47 No.5, October 2019

Written on November 19, 2019.

Comparison of wind forecasts and observations at Lake Saint-Charles, Quebec: Results from 2018

Written on October 27, 2019.

– By Richard Leduc, AirMet Science Inc –

In a recent CMOS Bulletin (Vol 46, No 4), the results of the comparison between the wind forecasts from the high resolution deterministic prediction system (SHRPD, 2.5 km, EAST sub-domain) which served as inputs to the CALMET diagnostic model and observations of the Lac St-Charles meteorological tower were presented for 273 days in 2017. The main results for 331 days of 2018 are discussed in this short article.

Climate in the Age of Empire: Weather Observers in Colonial Canada

Written on August 10, 2019.

– Review by Richard Leduc, Ph.D., AirMet Science Inc., rleduc@airmetscience.com –

By Victoria C. Slonosky, Published by the American Meteorological Society, paperback, 288 pages, ISBN 9781944970208, $45.00

The material in this book is abundant. I have read many sections of the book and each is very detailed and contains many anecdotes, facts, and examples that supplement the topics covered and are tied to historical facts. Dr. J. F. Gaultier’s contribution to the early days of the colony is impressive, and Slonosky’s book shines in highlighting it, and the contribution of Smallwood, McCord and many others. The author also introduces the issue of climate change that preoccupied these pioneers,

Banner Image for Gilbert's article on the origins of PM2.5 into Quebec shows a sunset skyline with smokestacks

Using Back-Trajectories to Trace the Origins of Fine Particulate Matter (PM2.5)

Written on September 25, 2018.

– By Jean-Philippe Gilbert, Richard Leduc, and Nathalie Barrette, Geography Department, University of Laval –

Air pollution in the province of Québec, Canada is monitored daily to allow for a rapid response to public health issues. However, there are few studies concerning the long-distance trend of pollutants, and those studies that do exist focus on a small area of study. The objective of this paper is to determine the sources of certain pollutants coming in to Québec,

CMOS Bulletin SCMO
Vol.46 No.4, August 2018

Written on August 30, 2018.

Image shows a red and white wind sock against a cloudy sky. Photo for the Wind at Lake Saint Charles article by Richard Leduc

Comparison of wind forecasts and observations at Lake Saint-Charles, Quebec

Written on August 22, 2018.

– By Richard Leduc and Maude Chartrand, Geography Department, Université Laval –

Lake Saint-Charles is the main source of drinking water for nearly 300,000 citizens of Quebec City’s and other municipalities. For several years obvious signs of accelerated aging of the water body were noticed, one of the symptoms of which is the appearance and recurrence (since 2006) of episodes of potentially toxic cyanobacterial water blooms.

Weather: A Very Short Introduction

Written on March 20, 2018.

– Review by Richard Leduc, Ph.D., AirMet Science Inc. –

By Storm Dunlop, Oxford University Press, Hardcover, 144 pages, ISBN 978-0-19-957132-4, $11.95

This book is part of the “Very short introduction” series published by Oxford University Press and is intended for the general public. The series includes a wide range of titles on a wide variety of topics of interest to inquiring minds.

Tag: Richard Leduc