Spatial distribution of polychlorinated naphthalenes in air over the Great Lakes and air-water gas exchange in Lake Ontario

2003 ◽  
Vol 22 (9) ◽  
pp. 1937-1944 ◽  
Author(s):  
Paul A. Helm ◽  
Liisa M. Jantunen ◽  
Jeff Ridal ◽  
Terry F. Bidleman
Keyword(s):  
Spatial Distribution ◽  
Gas Exchange ◽  
Great Lakes ◽  
Lake Ontario ◽  
Polychlorinated Naphthalenes ◽  
Water Gas

Air–water gas exchange of chiral and achiral organochlorine pesticides in the Great Lakes

2008 ◽  
Vol 42 (36) ◽  
pp. 8533-8542 ◽  
Author(s):  
L JANTUNEN ◽  
P HELM ◽  
J RIDAL ◽  
T BIDLEMAN
Keyword(s):  
Gas Exchange ◽  
Great Lakes ◽  
Organochlorine Pesticides ◽  
Water Gas

Enantiomers of α-Hexachlorocyclohexane as Tracers of Air−Water Gas Exchange in Lake Ontario

1997 ◽  
Vol 31 (7) ◽  
pp. 1940-1945 ◽  
Author(s):  
Jeffrey J. Ridal ◽  
Terry F. Bidleman ◽  
Bryan R. Kerman ◽  
Michael E. Fox ◽  
William M. J. Strachan
Keyword(s):  
Gas Exchange ◽  
Lake Ontario ◽  
Water Gas

Zebra Mussels as Biomonitors for Organic Contaminants in the Lower Great Lakes

1996 ◽  
Vol 31 (2) ◽  
pp. 411-432 ◽  
Author(s):  
Michael E. Comba ◽  
Janice L. Metcalfe-Smith ◽  
Klaus L.E. Kaiser
Keyword(s):  
Great Lakes ◽  
Organic Contaminants ◽  
Lake Erie ◽  
Soft Tissues ◽  
Lake Ontario ◽  
Dry Weight ◽  
Zebra Mussels ◽  
Organic Contamination ◽  
Contamination Levels ◽  
St Lawrence River

Abstract Zebra mussels were collected from 24 sites in Lake Erie, Lake Ontario and the St. Lawrence River between 1990 and 1992. Composite samples of whole mussels (15 sites) or soft tissues (9 sites) were analyzed for residues of organochlo-rine pesticides and PCBs to evaluate zebra mussels as biomonitors for organic contaminants. Mussels from most sites contained measurable quantities of most of the analytes. Mean concentrations were (in ng/g, whole mussel dry weight basis) 154 ΣPCB, 8.4 ΣDDT, 3.5 Σchlordane, 3.4 Σaldrin, 1.4 ΣBHC, 1.0 Σendosulfan, 0.80 mirex and 0.40 Σchlorobenzene. Concentrations varied greatly between sites, i.e., from 22 to 497 ng/g for ΣPCB and from 0.08 to 11.6 ng/g for ΣBHC, an indication that mussels are sensitive to different levels of contamination. Levels of ΣPCB and Σendosulfan were highest in mussels from the St. Lawrence River, whereas mirex was highest in those from Lake Ontario. Overall, mussels from Lake Erie were the least contaminated. These observations agree well with the spatial contaminant trends shown by other biomoni-toring programs. PCB congener class profiles in zebra mussels are also typical for nearby industrial sources, e.g., mussels below an aluminum casting plant contained 55% di-, tri- and tetrachlorobiphenyls versus 31% in those upstream. We propose the use of zebra mussels as biomonitors of organic contamination in the Great Lakes.

scholarly journals Air-water gas exchange and CO2flux in a mangrove-dominated estuary

2014 ◽  
Vol 41 (1) ◽  
pp. 108-113 ◽  
Author(s):  
David T. Ho ◽  
Sara Ferrón ◽  
Victor C. Engel ◽  
Laurel G. Larsen ◽  
Jordan G. Barr
Keyword(s):  
Gas Exchange ◽  
Water Gas

20. The Description to Look Down on All Opposition”: The Remains of HMS St. Lawrence

2018 ◽  
Author(s):  
Aaron Styba
Keyword(s):  
Great Lakes ◽  
Lake Ontario ◽  
Balance Of Power ◽  
War Of 1812 ◽  
Western Hemisphere ◽  
Nuclear Bomb ◽  
Joint Investigation ◽  
Queen's University ◽  
Parks Canada

In one of the most ignominious wars in history, a combined force of British and Canadian soldiers, sailors and civilians constructed the largest wooden warship ever built in the western hemisphere. Engaged with the Americans in a desperate game of cat-and-mouse upon Lake Ontario, the massive warship HMS St. Lawrence swung the balance of power firmly in favour of the British and thereby hastened the signing of the Treaty of Ghent, bringing the War of 1812 to a sputtering halt.This colossal warship, over 200 feet long, crewed by 700 and carrying 112 cannon, was completed at Kingston, Ontario in little over 9 months. Patrolling Lake Ontario, HMS St. Lawrence immediately caused the Americans to flee to their harbour. Astoundingly, and in a very Canadian fashion, she never fired a shot in combat.After the war ended, years of disrepair and dereliction left HMS St. Lawrence as a hulk of her former self. Sold to a local entrepreneur for a measly £25, she found herself towed to a location near Queen’s University. Mysteriously, she then disappeared from history. After the consideration of several theories, the hope is that this presentation, based upon the research conducted in a joint investigation by Parks Canada, the Marine Museum of the Great Lakes and Queen’s University, will help determine the fate of this “nuclear bomb of her age.”This presentation will outline the fascinating origins of HMS St. Lawrence, how she was archaeological documented, what the investigation tells us, and why investigating naval heritage is a worthy undertaking.

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