Model simulations of the Bay of Fundy Gyre : 2. Hindcasts for 2005–2007 reveal interannual variability in retentiveness
Aretxabaleta, Alfredo L.
McGillicuddy, Dennis J.
Smith, Keston W.
Manning, James P.
Lynch, Daniel R.
MetadataShow full item record
A persistent gyre at the mouth of the Bay of Fundy results from a combination of tidal rectification and buoyancy forcing. Here we assess recent interannual variability in the strength of the gyre using data assimilative model simulations. Realistic hindcast representations of the gyre are considered during cruises in 2005, 2006, and 2007. Assimilation of shipboard and moored acoustic Doppler current profiler velocities is used to improve the skill of the simulations, as quantified by comparison with nonassimilated drifter trajectories. Our hindcasts suggest a weakening of the gyre system during May 2005. Retention of simulated passive particles in the gyre during that period was highly reduced. A recovery of the dense water pool in the deep part of the basin by June 2006 resulted in a return to particle retention characteristics similar to climatology. Retention estimates reached a maximum during May 2007 (subsurface) and June–July 2007 (near surface). Interannual variability in the strength of the gyre was primarily modulated by the stratification of the dense water pool inside the Grand Manan Basin. These changes in stratification were associated with mixing conditions the preceding fall–winter and/or advectively driven modification of water mass properties.
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 114 (2009): C09005, doi:10.1029/2008JC004948.
Suggested CitationArticle: Aretxabaleta, Alfredo L., McGillicuddy, Dennis J., Smith, Keston W., Manning, James P., Lynch, Daniel R., "Model simulations of the Bay of Fundy Gyre : 2. Hindcasts for 2005–2007 reveal interannual variability in retentiveness", Journal of Geophysical Research 114 (2009): C09005, DOI:10.1029/2008JC004948, https://hdl.handle.net/1912/3491
Showing items related by title, author, creator and subject.
Composition and variability of the Denmark Strait Overflow Water in a high-resolution numerical model hindcast simulation Behrens, Erik; Våge, Kjetil; Harden, Benjamin E.; Biastoch, Arne; Böning, Claus W. (John Wiley & Sons, 2017-04-04)The upstream sources and pathways of the Denmark Strait Overflow Water and their variability have been investigated using a high-resolution model hindcast. This global simulation covers the period from 1948 to 2009 and ...
Aretxabaleta, Alfredo L.; McGillicuddy, Dennis J.; Smith, Keston W.; Lynch, Daniel R. (American Geophysical Union, 2008-10-29)The characteristics of a persistent gyre in the mouth of the Bay of Fundy are studied using model simulations. A set of climatological runs are conducted to evaluate the relative importance of the different forcing mechanisms ...
Discontinuous hindcast simulations of estuarine bathymetric change : a case study from Suisun Bay, California Ganju, Neil K.; Jaffe, Bruce E.; Schoellhamer, David H. (Elsevier B.V., 2011-04-15)Simulations of estuarine bathymetric change over decadal timescales require methods for idealization and reduction of forcing data and boundary conditions. Continuous simulations are hampered by computational and data ...