http://hdl.handle.net/1957/23252 2013-06-19T03:01:10Z 2013-06-19T03:01:10Z Ruggiero, Peter http://hdl.handle.net/1957/39424 2013-06-17T18:28:16Z 2013-03-01T00:00:00Z

Is the intensifying wave climate of the U.S. Pacific Northwest increasing flooding and erosion risk faster than sea level rise? Ruggiero, Peter The relative contributions of sea level rise (SLR) and increasing extra-tropical storminess to the frequency with which waves attack coastal features is assessed with a simple total water level (TWL) model. For the coast of the U.S. Pacific Northwest (PNW) over the period of wave-buoy observations (~30 years) wave height (and period) increases have had a more significant role in the increased frequency of coastal flooding and erosion than has the rise in sea level. Where tectonic-induced vertical land motions are significant and coastlines are presently emergent relative to mean sea level, increasing wave heights results in these stretches of coast being possibly submergent relative to the TWL. While it is uncertain whether wave height increases will continue into the future, it is clear that this process could remain more important than or at least as important as SLR for the coming decades, and needs to be taken into account in terms of the increasing exposure of coastal communities and ecosystems to flooding and erosion. This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Society of Civil Engineers and can be found at: http://ascelibrary.org/toc/jwped5/current.

2013-03-01T00:00:00Z Shearman, R. Kipp Childress, Jeremy L. http://hdl.handle.net/1957/39417 2013-06-17T18:00:21Z 2012-06-01T00:00:00Z

Deploying Dissolved Oxygen Sensors On Crab Pots for Ocean Observations Researchers Partner With Fishermen to Use Auto- Reporting Bottom-Positioned Sensors for Ocean Research Shearman, R. Kipp; Childress, Jeremy L. This is a scanned version of a published article. The original can be found at: http://www.sea-technology.com/features/2012/0612/oxygen_sensors.php.

2012-06-01T00:00:00Z Hickey, Barbara M. Trainer, Vera L. Kosro, P. Michael Adams, Nicolaus G. Connolly, Thomas P. Kachel, Nancy B. Geier, Susan L. http://hdl.handle.net/1957/39414 2013-06-17T17:33:25Z 2013-05-01T00:00:00Z

A springtime source of toxic Pseudo-nitzschia cells on razor clam beaches in the Pacific Northwest Hickey, Barbara M.; Trainer, Vera L.; Kosro, P. Michael; Adams, Nicolaus G.; Connolly, Thomas P.; Kachel, Nancy B.; Geier, Susan L. Concentrations of domoic acid (DA) above the regulatory limit in Washington coast razor clams are usually higher on northern beaches from summer to fall. Recent field studies have confirmed that the primary source of toxic Pseudo-nitzschia (PN) cells in those seasons is a semi-retentive topographically trapped seasonal eddy located offshore and north of the clamming beaches. Another semi-retentive coastal feature, Heceta Bank, that has been shown to support toxic PN cells in summer, is located south of Washington's clamming beaches. In this paper we present evidence to demonstrate that Heceta Bank, although not a likely source of toxic cells to Washington in summer due to the prevailing southward seasonal currents, may be a source of cells in springtime before the southward currents develop. In contrast to summer and fall seasons, concentrations of DA in razor clams are typically higher at southern beaches in spring. The likelihood of a southern source is explored using biological and transport data surrounding a period of toxic razor clams in April 2005. In particular, satellite-derived chlorophyll data confirm that a bloom occurred over Heceta Bank in March of that year, just prior to a period of strong storm-driven northward transport. PN cells of the same species observed in the April bloom on Washington beaches and in offshore waters were documented in Oregon offshore waters on the northern edge of Heceta Bank. That species, P. australis, has been shown to be highly toxic in this region; shore-based data show that razor clams on Oregon beaches were also toxic at the time when P. australis was observed offshore. Both measured and modeled currents show that transport was more than sufficient to move cells from the vicinity of Heceta Bank, Oregon to southern Washington beaches by the time the toxic cells were observed on those beaches. The rapid transport was due in part to the presence of the buoyant plume from the Columbia River, a common feature in winter and spring in nearshore waters of the U.S. Pacific Northwest. (c) 2013 Elsevier B.V. All rights reserved. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Elsevier and can be found at: http://www.elsevier.com/.

2013-05-01T00:00:00Z Pierson, James J. Batchelder, Harold Saumweber, Whitley Leising, Andrew Runge, Jeffrey http://hdl.handle.net/1957/39410 2013-06-17T16:59:20Z 2013-03-26T00:00:00Z

The impact of increasing temperatures on dormancy duration in Calanus finmarchicus Pierson, James J.; Batchelder, Harold; Saumweber, Whitley; Leising, Andrew; Runge, Jeffrey Dormancy is a key life history trait of planktonic calanoid copepods in the genus Calanus. Empirical evidence suggests that duration of dormancy is controlled by ambient temperature driving lipid metabolism in individuals. Here, we use the temperature-dependent metabolic rates of overwintering individuals to show that increasing temperatures, associated with global climate change over the next several decades, may reduce dormancy duration for the north Atlantic species C. finmarchicus by up to 40 days. Our calculations are based on comparing predicted dormancy duration for individuals of a given size at specific temperatures to dormancy duration at warmer temperatures and smaller size. We also provide corrections to the relationship of dormancy duration described by Saumweber and Durbin [Estimating potential diapause duration in Calanus finmarchicus. Deep Sea Res. Pt. II., 53, 2597–2617.]. Our calculations indicate that changing temperatures in the sea may lead to phenological shifts in life histories of C. finmarchicus and congeners, which may have implications for planktonic food web and trophic dynamics. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Oxford University Press and can be found at: http://www.oxfordjournals.org/

2013-03-26T00:00:00Z