Journal of Tropical Oceanography >
Eddy-induced cross-shelf phytoplankton transport along the downwelling coast off Western Australia
Received date: 2009-04-08
Revised date: 2009-09-07
Online published: 2009-10-10
Along the downwelling coast off Western Australia, late-autumn/early-winter chlorophyll a blooms are observed on the continental shelf south of Shark Bay (26°S), in contrast with summer blooms in the north. The late-autumn/early-winter blooms are in phase with seasonal strengthening of the Leeuwin Current and its eddy field. Anticyclonic eddies entrain the high phytoplankton biomass waters from the shelf and transport offshore into the oligotrophic, subtropical marine environment, as revealed by coalescing the finite-size Lyapunov exponent (FSLE) of the surface geostrophic flow field and the satellite chlorophyll a images.
FENG Ming . Eddy-induced cross-shelf phytoplankton transport along the downwelling coast off Western Australia[J]. Journal of Tropical Oceanography, 2009 , 28(5) : 6 -10 . DOI: 10.11978/j.issn.1009-5470.2009.05.006
[1] GARFIELD N, EVANS D L. Shelf water entrainment by Gulf Stream warm-core rings[J]. J Geophys Res, 1987, 92: 13003-13012.
[2] PELIZ A, SANTOS A M, OLIVEIRA P B, et al. Extreme cross-shelf transport induced by eddy interactions southwest of Iberia in winter 2001[J]. Gephys Res Lett, 2004, 31, L08301, doi:10.1029/2004GL019618.
[3] CRAWFORD W R, BRICKLEY P J, PETERSON T D, et al. Impact of Haida eddies on chlorophyll distribution in the eastern Gulf of Alaska[J]. Deep-Sea Res, Ⅱ, 2005, 52: 975-989.
[4] FENG M, MAJEWSKI L, FANDRY C B, et al. Characteristics of two counter-rotating eddies in the Leeuwin Current system off the Western Australian coast[J]. Deep-Sea Res, II, 2007, 54: 961-980.
[5] FENG M, WIJFFELS S, GODFREY S, et al. Do eddies play a role in the momentum balance of the Leeuwin Current? [J]. J Phys Oceanogr, 2005, 35(6): 964-975.
[6] FENG M, MEYERS G, PEARCE A, et al. Annual and interannual variations of the Leeuwin Current at 32°S[J]. J Geophys Res, 2003, 108(11): 3355, doi:10.1029/2002JC001763.
[7] WAITE A M, THOMPSON P A, PESANT S, et al. The Leeuwin Current and its eddies: an introductory overview[J]. Deep-Sea Res, II, 2007, 54: 789-796.
[8] HANSON C E, PATTIARATCHI C B, WAITE A M. Sporadic upwelling on a downwelling coast: phytoplankton responses to spatially variable nutrient dynamics off the Gascoyne region of Western Australia[J]. Cont shelf Res, 2005, 25: 1561-1582.
[9] KOSLOW J A, PESANT S, FENG M, et al. The effect of the Leeuwin Current on phytoplankton biomass and production off southwestern Australian[J]. Journal of Geophysical Research, 2008, 113: C07050. doi:10.1029/2007JC004102.
[10] THOMAS A C, CARR M-E, STRUB T T. Chlorophyll variability in the eastern boundary currents[J]. Geophys Res Lett, 2001, 28(18): 3421-3424.
[11] OTTINO J M. The Kinematics Of Mixing: Stretching, Chaos And Transport[M]. Cambridge University, Cambridge, 1989.
[12] BOFFETTA G, LACORATA G, REDAELLI G, et al. Detecting barriers to transport: a review of different techniques[J]. Physica D, 2001, 159: 58-70.
[13] JOSEPH B, LEGRAS B. Relation between kinematic boundaries, stirring, and barriers for the Antarctic Polar Vortex[J]. Journal of the Atmospheric Sciences, 2002, 59: 1198-1212.
[14] d’OVIDIO F, FERNANDEZ V, HERNANDEZ-GARCIA E, et al. Mixing structure in the Mediterranean Sea from finite-size Lyapunov exponents[J]. Geophys Res Lett, 2004, 31, L17203, doi:10.1029/2004GL020328.
[15] Le TRAON P Y, NADAL F, DUCET N. An improved mapping method of multi-satellite altimeter data[J]. Journal of Atmospheric & Oceanic Technology, 1998, 25: 522-534.
[16] MALTRUD M E, SMITH R D, SEMTNER A J, et al. Global eddy-resolving ocean simulations driven by 1985-1995 atmospheric winds[J]. J Geophys Res, 1998, 103, 30825-30853.
[17] FANG F, MORROW R. Evolution, movement and decay of war-core Leeuwin Current eddies[J]. Deep-Sea Res Ⅱ, 2003, 50: 2245-2262.
[18] WHITNEY F, ROBERT M. Structure of Haida eddies and their transport of nutrient from coastal margins into the NE Pacific Ocean[J]. Journal of Oceanography, 2002, 58: 715-723.
/
〈 | 〉 |