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Habitat Complexity Of Polychaete Tube-Caps: Influence Of Architecture On Dynamics Of A Meioepibenthic Assemblage, Susan B. Bell Jan 1985

Habitat Complexity Of Polychaete Tube-Caps: Influence Of Architecture On Dynamics Of A Meioepibenthic Assemblage, Susan B. Bell

Journal of Marine Research

A series of field experiments was conducted in a shallow sandflat in Tampa Bay, Florida, to examine the relationship between the abundance and diversity of meiofauna and the architectural complexity of tube-caps constructed by the polychaete, Diopatra cuprea. Two groups of azoic tube-caps were utilized: 1) tube-caps collected from the field and defaunated in the laboratory or 2) tube-caps created in laboratory aquaria with azoic sediment under controlled conditions. Tube-caps were designated "high" or "low" complexity based upon the amount of shell hash incorporated into tube-cap structure, replanted into sediments at 2 sites during February–April 1982 and collected 1, 3, …

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Evolution Of Sea-Surface Temperature In The Tropical Atlantic Ocean During Fgge, 1979: Ii. Oceanographic Fields And Heat Balance Of The Mixed Layer, Robert L. Molinari, John F. Festa, Eric Marmolejo Jan 1985

Evolution Of Sea-Surface Temperature In The Tropical Atlantic Ocean During Fgge, 1979: Ii. Oceanographic Fields And Heat Balance Of The Mixed Layer, Robert L. Molinari, John F. Festa, Eric Marmolejo

Journal of Marine Research

Surface meteorological and surface and subsurface oceanographic data collected during 1979 are used to describe sea-surface temperature, mixed layer depth, zonal current component and net oceanic heat gain fields and to estimate the terms in a heat balance relation for the mixed layer. The terms are evaluated monthly on a 6° of latitude by 10° of longitude grid which covers the equatorial Atlantic from 9S to 9N. The first balance tested is between changes in mixed layer temperature and surface energy fluxes. These fluxes can account for more than 75% of the variance in the original time series of the …

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Three-Dimensional Shelf Circulation Along An Eastern Ocean Boundary, Julian P. Mccreary Jr., Shenn-Yu Chao Jan 1985

Three-Dimensional Shelf Circulation Along An Eastern Ocean Boundary, Julian P. Mccreary Jr., Shenn-Yu Chao

Journal of Marine Research

A linear, three-dimensional, continuously stratified model is used to study wind-driven ocean circulation near an eastern coast in the presence of a continental shelf. A simplifying assumption is that the alongshore flow field is in geostrophic balance. This assumption allows steady solutions to be obtained numerically with a very efficient scheme. As a result, it is possible to find solutions for a wide variety of model parameters and shelf profiles.A band of equatorward wind forces the ocean, and the resulting solutions have many features in common with observations at eastern boundaries. They all have a surface equatorward jet, but do …

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Meiofauna-Sediment Interactions Around Subtropical Seagrass Sediments Using Factor Analysis, A. W. Decho, W. D. Hummon, J. W. Fleeger Jan 1985

Meiofauna-Sediment Interactions Around Subtropical Seagrass Sediments Using Factor Analysis, A. W. Decho, W. D. Hummon, J. W. Fleeger

Journal of Marine Research

Subtidal meiobenthic samples were collected from sediments within a seagrass bed (Thalassia testudinum) and an adjacent barren sand area in the Florida Keys. Fine-scale differences in sediment and heterogeneity, with respect to sediment grain parameters were analyzed using factor analysis. Sediment heterogeneity was related to meiofaunal distributions. Eighteen meiofaunal taxa representing 15 phyla were found. Nematodes comprised 58% of the total meiofauna. Eight gastrotrich, 26 harpacticoid, and one cyclopoid species were found. In comparing the seagrass area to the barren sand area by ANOVA, significant differences in density were noted for total meiofauna and polychaetes, but not for …

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Phytoplankton Patchiness: Inferences From Particle Statistics, Andrew F. Bennett, Kenneth L. Denman Jan 1985

Phytoplankton Patchiness: Inferences From Particle Statistics, Andrew F. Bennett, Kenneth L. Denman

Journal of Marine Research

We examine the influence of mesoscale turbulence and random growth rate fields upon phytoplankton patchiness, on length scales from 1 km to 100 km and time scales from 1 day to 100 days. We consider phytoplankton concentrations with quite general nonlinear growth rate functions, such that the concentration is bounded for all time. We use, and justify the use of, particle separation statistics to deduce variance spectra of nonlinearly transformed concentration. Two growth rate models are examined: an advected field, and a locally specified field. Both lead to initial patchiness in the concentration, correlated with the growth rate field. The …

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Effect Of Physical Disturbance On Population Dynamics And Trophic Interactions Among Microbes And Meiofauna, Daniel M. Alongi Jan 1985

Effect Of Physical Disturbance On Population Dynamics And Trophic Interactions Among Microbes And Meiofauna, Daniel M. Alongi

Journal of Marine Research

A series of laboratory experiments was conducted to assess the effects of physical disturbance of surface sediments on trophic interactions among bacteria, protozoa and meiofauna. Bacteria, zooflagellates, and populations of the hypotrich ciliate Aspidisca sp. and the nematode Diplolaimella chitwoodi were, at most sampling periods, not significantly affected by small-scale, daily disturbances. However, populations of the epibenthic harpacticoid copepod Tisbe holothuriae became disproportionately abundant in disturbed cultures.Bacterial numbers, growth rates and doubling times were affected little by the presence of meiofauna. The response of zooflagellates was not clear; populations of the ciliate Aspidisca sp. were, at most sampling intervals, significantly …

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Nitrogen Storage And Use Of Biochemical Indices To Assess Nitrogen Deficiency And Growth Rate In Natural Plankton Populations, Q. Dortch, J. R. Clayton Jr., S. S. Thoresen, J. S. Cleveland, S. L. Bressler, S. I. Ahmed Jan 1985

Nitrogen Storage And Use Of Biochemical Indices To Assess Nitrogen Deficiency And Growth Rate In Natural Plankton Populations, Q. Dortch, J. R. Clayton Jr., S. S. Thoresen, J. S. Cleveland, S. L. Bressler, S. I. Ahmed

Journal of Marine Research

Various newly developed indicators of N deficiency, physiological state (approximate growth rate), and N source for growth were measured during five cruises to Dabob Bay, Washington from early spring to summer. Although nitrate and ammonium in the surface layer were depleted early in the spring, the plankton populations never became extremely N deficient, as indicated by high intracellular amino acid/protein ratios. However, growth rates, estimated from protein/DNA or RNA/DNA ratios, were usually low unless nitrate concentrations were high or had recently been high, as indicated by large intracellular nitrate pools or high nitrate reductase activities. High growth rates were observed …

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Correlation Scales, Objective Mapping And A Statistical Test Of Geostrophy Over The Continental Shelf, Kenneth L. Denman, Howard J. Freeland Jan 1985

Correlation Scales, Objective Mapping And A Statistical Test Of Geostrophy Over The Continental Shelf, Kenneth L. Denman, Howard J. Freeland

Journal of Marine Research

We have constructed spatial structure functions for oceanographic variables, collected during 15 cruises off the coast of Vancouver Island, Canada over a 3 year period (1979–81), to determine the appropriate correlation function and unresolved noise level for objective mapping according to the Gauss-Markov theorem. The assumption of quasigeostrophic flow has been tested by comparing the longitudinal and transverse velocity shear structure functions derived from geopotential height fields with those derived from 6 current meter moorings. In addition objective maps of geopotential height imply current shears similar to the directly observed shear vectors, as would be expected under geostrophic control. Structure …

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Features Of The Circulation In The Mozambique Basin In 1981, Marten L. Gründlingh Jan 1985

Features Of The Circulation In The Mozambique Basin In 1981, Marten L. Gründlingh

Journal of Marine Research

Several cruises of the RV Meiring Naudé in 1981 were aimed at deriving the background or average circulation in the Mozambique Basin. This information would be of direct benefit to determine the advection of isolated eddies in this area. The results reflected the existence of a strong (up to 67 × 106 m3s−1) but variable current in the vicinity of the Mozambique Ridge. An eddy associated with this current and situated east of the Ridge emerged as a significant feature of the survey. No evidence could be found of a consistent background flow in the …

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Dynamics Of Temperature And Chlorophyll Structures Above A Seamount: An Oceanic Experiment, Amatzia Genin, George W. Boehlert Jan 1985

Dynamics Of Temperature And Chlorophyll Structures Above A Seamount: An Oceanic Experiment, Amatzia Genin, George W. Boehlert

Journal of Marine Research

Three hydrographic surveys comprised of densely spaced XBT and CTD stations were conducted over Minami-kasuga Seamount, in the northwest Pacific (21°36′N, 143°38′E). A cold dome, similar to a Taylor column, was observed above the seamount top during the first survey. Uplifted isotherms penetrated to the lower euphotic zone and were associated with higher chlorophyll concentrations. Vertical displacement of uplifted isotherms decayed with elevation above the seamount, so that both temperature and chlorophyll anomalies were undetectable at depths less than 80 m. Relatively high chlorophyll concentrations in a layer from 80 m to 100m depth formed a distinctive deep chlorophyll maximum …

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Flux Measurements Across A Finger Interface At Low Values Of The Stability Ratio, Trevor J. Mcdougall, John R. Taylor Jan 1984

Flux Measurements Across A Finger Interface At Low Values Of The Stability Ratio, Trevor J. Mcdougall, John R. Taylor

Journal of Marine Research

We present the results of laboratory experiments across a sharp finger interface using heat and salt as the properties which contribute to density. Values of the stability ratio Rp as low as 1.2 were achieved so the results approach the range of Rp which is of interest in the ocean. The buoyancy flux ratio, corrected for vertical heat conduction, Rf* was found to depend on Rp, but at Rp = 1.2, Rf* is still only 0.65 ± 0.1. Values of Stern's number A = βFs(l – Rf)/ …

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Effects Of Remote Annual Forcing In The Eastern Tropical Atlantic Ocean, Julian P. Mccreary Jr., Joel Picaut, Dennis W. Moore Jan 1984

Effects Of Remote Annual Forcing In The Eastern Tropical Atlantic Ocean, Julian P. Mccreary Jr., Joel Picaut, Dennis W. Moore

Journal of Marine Research

An ocean model is used to study the effects of remote annual forcing in the eastern tropical Atlantic. The model is linear, viscid and continuously stratified. The ocean basin is an idealized version of that of the tropical Atlantic, and the wind stress forcing the model is an idealized representation of the annual variation of the equatorial trades in the western Atlantic. Solutions are represented as expansions of the baroclinic modes of the system. The response of each mode is found numerically, not by integrating the equations of motion forward in time, but at a fixed frequency (2π year–1 …

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Wind And Thermal Conditions Along The Equatorial Pacific, Jene-René Donguy, Alain Dessier, Gérard Eldin, Alain Morliere, Gary Meyers Jan 1984

Wind And Thermal Conditions Along The Equatorial Pacific, Jene-René Donguy, Alain Dessier, Gérard Eldin, Alain Morliere, Gary Meyers

Journal of Marine Research

Variability in heat storage of the equatorial Pacific Ocean during El Nino Southern Oscillation episodes is analyzed from subsurface temperature observations in order to show how the patterns of heat content are related to changes in the Walker Circulation. Large-scale zonal gradients in depth of the thermocline (and dynamic height) are largely in equilibrium with local zonal wind stress. Depth of the thermocline is positively correlated with mixed layer heat content and sea-surface temperature in the central Pacific during a minor El Nino/Southern Oscillation episode in 1969, indicating that the oceanic dynamic response to wind forcing as well as thermodynamic …

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The Influence Of Seagrass Cover On Population Structure And Individual Growth Rate Of A Suspension-Feeding Bivalve, Mercenaria Mercenaria, C. H. Peterson, H. C. Summerson, P. B. Duncan Jan 1984

The Influence Of Seagrass Cover On Population Structure And Individual Growth Rate Of A Suspension-Feeding Bivalve, Mercenaria Mercenaria, C. H. Peterson, H. C. Summerson, P. B. Duncan

Journal of Marine Research

The average density of Mercenaria mercenaria in 216 ¼-m2 samples taken in spring 1980 from an eelgrass (Zostera marina) bed in Back Sound, North Carolina, was 9.0 m–2, more than five times the average density (1.6 m–2) in 216 ¼-m2 samples from a nearby sand flat. Size-frequency distributions differed between environments, with the sand flat containing a larger fraction of its Mercenaria in the smallest size class (0–1 cm). Use of internal growth lines to age all Mercenaria collected revealed that age-frequency distributions also differed between environments but that average Mercenaria age …

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Habitat Dimensions Of Calanoid Copepods In The Western Gulf Of Mexico, James A. Cummings Jan 1984

Habitat Dimensions Of Calanoid Copepods In The Western Gulf Of Mexico, James A. Cummings

Journal of Marine Research

The vertical distributions of 49 species (53 taxa) of calanoid copepods were determined in cyclonic and anticyclonic hydrographic features in the western Gulf of Mexico for three seasons of the year. The relative intensities of the features varied among seasons, while within seasons the physical structure between features was different. Since the same copepod species were present in both features for all seasons sampled, the contrasting hydrography provided a natural experiment in which to study the mechanisms, biological or physical, acting to influence species vertical distribution patterns. Hierarchial classification analysis revealed that groups of samples characterized by relatively homogeneous biotic …

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Nephelometer And Current Observations At The Stie Site, Panama Basin, W. D. Gardner, J. K. B. Bishop, P. E. Biscaye Jan 1984

Nephelometer And Current Observations At The Stie Site, Panama Basin, W. D. Gardner, J. K. B. Bishop, P. E. Biscaye

Journal of Marine Research

The LDGO-Thorndike film recording nephelometer was used in three modes (profiling, short-term tethered and long-term moored) to measure changes in particle concentrations on time scales of minutes to weeks and space scales of meters to 25 km while measurements were being made on production and settling rates of particles. Although the nepheloid layer had no large near-bottom increase suggestive of local resuspension, there was an unusually thick nepheloid layer due to resuspension and advection of sediment from the basin walls. The concentration of particles increased by a factor of 3 between 900 m and the seafloor at 3840 m, while …

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Comments On "On The Determination Of Absolute Velocities In The Ocean" By M. E. Fiadeiro And G. Veronis, Lee-Lueng Fu Jan 1984

Comments On "On The Determination Of Absolute Velocities In The Ocean" By M. E. Fiadeiro And G. Veronis, Lee-Lueng Fu

Journal of Marine Research

Fiadeiro and Yeronis (1982, FY hereafter) proposed a procedure that they claimed would lead to the best reference level for computing the absolute velocities in the ocean by the inverse method as described in Wunsch (1978). According to FY, the reference level obtained by the procedure is best because the correction required of the absolute velocities at this level to satisfy a set of imposed constraints is minimum among all the possible levels. However, one likes to ask whether the velocity field resulting from this choice of reference level is necessarily the best in the sense of being closest to …

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Spatial And Temporal Effects Of Salinity, Temperature And Chlorophyll On The Communities Of Zooplankton In The Southeastern Bering Sea, Sharon L. Smith, Julio Vidal Jan 1984

Spatial And Temporal Effects Of Salinity, Temperature And Chlorophyll On The Communities Of Zooplankton In The Southeastern Bering Sea, Sharon L. Smith, Julio Vidal

Journal of Marine Research

Analyses of 402 samples collected from late March through early June in 1980 have shown that the two communities of zooplankton over the southeastern shelf of the Bering Sea are kept separate spatially by the lack of advection and frontal characteristics of the salinity distributions. The abundance of copepods over the middle shelf, between 50 and 100 m isobaths approximately, was highly correlated with seasonal warming of the surface layer, while abundances of copepods over the outer shelf and slope were not. The spring bloom of phytoplankton influenced abundances over the middle shelf more profoundly than the outer shelf; of …

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Erratum In "The Importance Of The Diffusive Permeability Of Animal Burrow Linings In Determining Marine Sediment Chemistry," By R. C. Aller; Journal Of Marine Research 41(2): 299-322., Robert C. Aller Jan 1984

Erratum In "The Importance Of The Diffusive Permeability Of Animal Burrow Linings In Determining Marine Sediment Chemistry," By R. C. Aller; Journal Of Marine Research 41(2): 299-322., Robert C. Aller

Journal of Marine Research

On page 304 The roots, am of equation (3) are correctly defined as… The an preceding the cos function was left out by mistake in the original printed version.

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Ferromanganese Micronodules From The Surficial Sediments Of Georges Bank, L. J. Poppe, R. F. Commeau, J. A. Commeau, F. T. Manheim, P. J. Aruscavage Jan 1984

Ferromanganese Micronodules From The Surficial Sediments Of Georges Bank, L. J. Poppe, R. F. Commeau, J. A. Commeau, F. T. Manheim, P. J. Aruscavage

Journal of Marine Research

Ferromanganese micronodules have been found on Georges Bank, off the U.S. northeast coast, distributed throughout the surficial sediments within an area about 125 km long and at least 12 km wide. These coarse, sand-sized concretions have precipitated from metal-rich interstitial waters and contain many of the textural and structural features common to other neritic nodules. Most of the nodules have accreted around detrital grains, and X-ray powder diffraction analyses indicate the presence of geothite and vernadite (δ-MnO2) in the ferromanganese layers. Chemical analyses of the micronodules, when compared with similar data on deep-sea manganese nodules, reveal …

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The Importance Of Microalgae, Bacteria And Particulate Organic Matter In The Somatic Growth Of Hydrobia Totteni, Thomas S. Bianchi, Jeffrey S. Levinton Jan 1984

The Importance Of Microalgae, Bacteria And Particulate Organic Matter In The Somatic Growth Of Hydrobia Totteni, Thomas S. Bianchi, Jeffrey S. Levinton

Journal of Marine Research

Laboratory microcosm experiments reveal that benthic microalgae (filamentous blue-green and diatoms) probably constitute the bulk of nutrition in the somatic growth of the deposit feeding mud snail Hydrobia totteni. Despite an apparent excess of nitrogen in the particulate fraction of the sediment, H. totteni grows only about 42% as much in the dark as in the light. Growth in the dark is probably explained by the utilization of filamentous blue greens and, to a lesser extent, bacteria. The additional growth in the light is probably explained by benthic diatoms, as shown in previous studies. Standing-stocks of micro-organisms (bacteria and …

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Reflection Of Low-Frequency Equatorial Waves At Arbitrary Western Boundaries, Mark A. Cane, Peter R. Gent Jan 1984

Reflection Of Low-Frequency Equatorial Waves At Arbitrary Western Boundaries, Mark A. Cane, Peter R. Gent

Journal of Marine Research

Procedures are developed for calculating effects of western boundaries of arbitrary geometry on low-frequency equatorial waves. We show that the mass flux incident at the coast is all returned eastward by equatorial Kelvin waves. Short Rossby waves generated as part of the reflection serve only to redistribute mass along the coast. For the case of a uniformly sloping coast we present formulae and graphical results for the amplitude of the equatorial Kelvin wave reflected at the coast due to incident free Rossby waves. Results are shown to depend on the single parameter γω where γ is the slope of the …

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Abyssal Eddy Kinetic Energy In The North Atlantic, William J. Schmitz Jr. Jan 1984

Abyssal Eddy Kinetic Energy In The North Atlantic, William J. Schmitz Jr.

Journal of Marine Research

Both eddy and mean fields have similar zonal and meridional scales of geographical variation in the mid-latitude North Atlantic. The first map of the North Atlantic that contained estimates of the intensity of the abyssal eddy field is now several years old, and in the interim the relevant data base has increased roughly six-fold. Contemporary charts are presented, containing these more recent observations, along with some new styles of data presentation. The basic picture of maximum abyssal eddy kinetic energy near the fully developed Gulf Stream is consistently substantiated, along with a two order or magnitude latitudinal decay (from about …

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Effects Of Velocity Fluctuations On Vertical Distributions Of Phytoplankton, Greg Holloway Jan 1984

Effects Of Velocity Fluctuations On Vertical Distributions Of Phytoplankton, Greg Holloway

Journal of Marine Research

Effects of vertical velocity oscillations (associated with high frequency internal gravity waves) upon the vertical distribution of horizontally averaged phytoplankton concentration are considered. It is suggested that such effects have been systematically misrepresented in previous modeling efforts. Correction terms are derived both for averaged quasi-Lagrangian (isopycnal) models and for averaged Eulerian models. In quasi-Lagrangian models, an apparent modification to growth rate coefficient is obtained. In Eulerian models, velocity fluctuations are shown to induce a net vertical transport which can be described by a “virtual velocity” and which is seen as a correction to eddy diffusivity parameterizations. Difficulties such as negative …

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Influence Of Residents On The Development Of A Marine Soft-Bottom Community, William G. Ambrose Jr. Jan 1984

Influence Of Residents On The Development Of A Marine Soft-Bottom Community, William G. Ambrose Jr.

Journal of Marine Research

Field experiments in a Maine estuary were designed to follow community development in newly exposed sediment to determine if resident infauna affect the settlement and survivorship of colonizing infauna and thereby effect changes in community structure. Sets of buckets consisting of control buckets (buckets with previously dried sediment) and two experimental treatments (Nereis virens or Glycera dibranchiata added to dried sediment) were exposed on three dates between June and October 1979 and sampled after 8, 16 and/or 24 weeks. At each sampling, new buckets were established. The index of proportionate similarity comparing the infaunal community of exposure periods with …

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Community Unity: Experimental Evidence For Meiofauna And Macrofauna, Susan S. Bell, Sarah A. Woodin Jan 1984

Community Unity: Experimental Evidence For Meiofauna And Macrofauna, Susan S. Bell, Sarah A. Woodin

Journal of Marine Research

The response of two different size classes of marine benthos, macrofauna and meiofauna, to manipulation of disturbance/predation and size specific utilization of biogenic structural refuges by each benthic size category were studied in an intertidal sandflat in Virginia. A field investigation was conducted during August and September 1980 in the same Diopatra tube system which Woodin (1978; 1981) previously utilized for macrofauna I experiments. Predator/disturber exclusion cages were employed to experimentally evaluate changes in patterns of abundance of both meiofauna and macrofauna in areas of varying Diopatra tube densities (0, 1, 3 or 6 Diopatra 0.01 m–2). Samples …

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Cycling Of Nitrogen By Plankton: A Hypothetical Description Based Upon Efficiency Of Energy Conversion, Dale A. Kiefer, C. Allen Atkinson Jan 1984

Cycling Of Nitrogen By Plankton: A Hypothetical Description Based Upon Efficiency Of Energy Conversion, Dale A. Kiefer, C. Allen Atkinson

Journal of Marine Research

Numerous studies of the nitrogen cycle in the upper ocean have shown that the growth of oceanic phytoplankton is often largely supported by the supply of ammonium excreted by herbivorous zooplankton and members of other tropic levels. Despite considerable knowledge of the growth and metabolic responses of phytoplankton and herbivorous zooplankton to supplies of energy and nutrients, no general quantitative description of nitrogen cycling in the planktonic community has been proposed. Here we present a hypothetical description of a closed, steady state, and well mixed water column in which nitrogen is cycled between a nutrient pool, the crop of phytoplankton, …

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Sediment-Water Exchange In Shallow Water Estuarine Sediments, Steven Emerson, Richard Jahnke, David Heggie Jan 1984

Sediment-Water Exchange In Shallow Water Estuarine Sediments, Steven Emerson, Richard Jahnke, David Heggie

Journal of Marine Research

Pore water profiles in shallow estuarine sediments of Puget Sound show the characteristics of enhanced interstitial-water transport by animal activity. Using an in situ 3H experiment and dissolved silicate profiles we evaluate the transport parameter due to animal activity in the surface 20 cm of sediments to be 1–5 × 10–7 s–1 which is in the range of similar parameters determined in other nearshore environments in the U.S. The fluxes of alkalinity, ammonia and silicate across the sediment-water interface due to biological processes are greater than that by one-dimensional molecular diffusion. For the metals Fe, Mn, Cu, …

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Oxalic, Glyoxalic And Pyruvic Acids In Eastern Pacific Ocean Waters, Spencer M. Steinberg, Jeffrey L. Bada Jan 1984

Oxalic, Glyoxalic And Pyruvic Acids In Eastern Pacific Ocean Waters, Spencer M. Steinberg, Jeffrey L. Bada

Journal of Marine Research

A sensitive high performance liquid chromatographic (HPLC) technique has been used to determine the concentration and distribution of several α-keto acids and oxalic acid in seawater samples from a station (28°29′N, 128°38′W) in the eastern Pacific Ocean. Glyoxalic, pyruvic and oxalic acids were found to be present. Although the pyruvic acid profile at this station was in general featureless, the profiles for glyoxalic and oxalic acids showed variations which could be attributed to both primary production and heterotropic activity. Surface waters were found to have a combined concentration of glyoxalic and oxalic acids of ∼300 to 400 nm/liter which makes …

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On The Equatorial Pacific Response To The 1982/1983 Ei Nino—Southern Oscillation Event, T. Y. Tang, R. H. Weisberg Jan 1984

On The Equatorial Pacific Response To The 1982/1983 Ei Nino—Southern Oscillation Event, T. Y. Tang, R. H. Weisberg

Journal of Marine Research

The ocean's response to the 1982/83 EI Nino—Southern Oscillation event was the largest ever documented. In this paper we explore the effects of certain details of the observed zonal wind stress anomaly field upon the ocean's response using a linear, adiabatic, reduced gravity, analytical model. The increase in magnitude of the downwelling response over the composite of previous EI Nino events is attributed to the eastward translation of the observed westerly wind anomaly and the double peaked downwelling at the South American coast is attributed to the amplitude modulation of this anomaly. Effects of an easterly anomaly which appeared to …

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