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RV_Samudrika_OCD[1]
RV_Samudrika_OCD[1]

Nutrient Cycles
Nutrient Cycles

... depleted by uptake into organisms in food chains. • One of the ways in which nutrients are removed from the surface waters of an ocean is by their uptake by primary producers, (phytoplankton) and their use for the synthesis of organic substances. – EX, nitrate ions are used in the synthesis of amino ...
Chapter 15 - Life Near the Surface
Chapter 15 - Life Near the Surface

Langmuir circulations and enhanced turbulence beneath wind
Langmuir circulations and enhanced turbulence beneath wind

... measurements from the 5oS ADCP section (175 m to 225 m depth) in March and April 2000 (Stramma et al., 2003). Snap-shots of the meridional velocity (v) from modeling along transects T11 and T21 are presented in Figures 8 and 10. These transects are situated near 11oS and 21oS, respectively. Positiv ...
Accumulation of Th, Pb, U, and Ra in marine phytoplankton and its
Accumulation of Th, Pb, U, and Ra in marine phytoplankton and its

... transported from surface to deep waters through biologically mediated processes (Rama et al. 1961; Bhat et al. 1969;Broecker et al. t973;Matsumoto 1975).The recent observations that the fluctuations in the settling fluxes of 228Thin the deep waters of the SargassoSea (Bacon et al. 1985) are strongly ...
The power of plankton
The power of plankton

... atmospheric levels of carbon dioxide would eventually rise by another 200 p.p.m. and global warming would accelerate further. Ominously, global warming has begun to slow down this phytoplankton-driven pump. In a study I worked on that was led by Michael Behrenfeld, now at Oregon State University, re ...
module - WordPress.com
module - WordPress.com

... chlorophyll monthly averages from January, April, July, and October of the previous year. Answer the questions below after viewing the above images. a. Is there a clear relationship between sea surface temperature and chlorophyll? b. How does this pattern vary across seasons? c. What factors might e ...
lecture
lecture

... • The amount of organic material available for growth and reproduction • Compensation depth – depth where net primary production equals zero – Not the CCD – Usually located where light intensity is about 1% of the surface value and typically occurs at a depth of~110 m in clear ocean water or 15 m in ...
Faculty of Geography and Geoecology, Saint-Petersburg
Faculty of Geography and Geoecology, Saint-Petersburg

... Phytoplankton of the Amur River estuary and adjacent areas of the Sea of Okhotsk and the Sea of Japan was investigated in July, 2005 at 33 stations. The study revealed 195 species of microalgae from 8 divisions. Microalgae varied most in Sakhalin Bay - 122 species - and less in Tartar Strait - 98 sp ...
T
T

... plankton convert CO2 into organic carbon via photosynthesis. But unlike land plants, decomposing plankton can sink into the deep ocean, carrying the carbon with them. It’s called the “biological pump,” and if it operated at 100 percent efficiency, nearly every atom of carbon drawn into the ocean wou ...
High-frequency acoustics and bio
High-frequency acoustics and bio

... on a slow-drop platform indicated that the nightly limit of downward migration for A. sanguinea was the nutricline. In contrast to the two thin zooplankton layers observed at midnight, the phytoplankton formed an intense thin layer at the base of the thermocline (Figure 1d). In the midnight ORCAS pr ...
Influence of currents on the production of tropical seas
Influence of currents on the production of tropical seas

... only a few definite results have emerged. These have usually coaeerned cases when there are marked changes, such as the spectacular spring plankton blooms in the high latitudes. Generally, however, the effect of environmental conditions on the development of phytoplankton and sooplankton is very dif ...
To change the ocean water density we can: provide heating/cooling
To change the ocean water density we can: provide heating/cooling

Sediment Deposition Supports Seafloor Spreading
Sediment Deposition Supports Seafloor Spreading

Behavior, physiology and the niche of depth
Behavior, physiology and the niche of depth

Behavior, physiology and the niche of depth
Behavior, physiology and the niche of depth

math lesson sheet
math lesson sheet

Sensitivity of euphotic zone properties to CDOM variations in marine
Sensitivity of euphotic zone properties to CDOM variations in marine

Effect of air-sea forcing on tropical ocean mixed layer depth (MLD
Effect of air-sea forcing on tropical ocean mixed layer depth (MLD

... transverse  axis.  The  meridional oscillation  has  a  phase  lag  of  about  90° to  the  zonal  oscillation,  both  oscillations  get   together  to  form  the  El  Niño/La  Niña  cycle,  which  Behaves  as  a  mixed  layer  water  oscillates  anticlockwise  within  the   tropical  Pacific  basin ...
Full text in pdf format
Full text in pdf format

... ABSTRACT: This paper presents the general framework of a n ecological model of the English Channel. The model is a result of combining a physical sub-model with a biological one. In the physical submodel, the Channel is divided into 71 boxes and water fluxes between them a r e calculated automatical ...
Marine phytoplankton play a critical role in regulating the earth`s
Marine phytoplankton play a critical role in regulating the earth`s

... Historical evidence buried in layers of ice from Antarctica also supported Martin’s hypothesis. The Vostok ice core, a record of the past 420,000 years of the earth’s history, implied that during ice ages the amount of iron was much higher and the average size of the dust particles was significantly ...
NIRB File No.: 16YN054 NPC File No.: 148315 Topic/Issue
NIRB File No.: 16YN054 NPC File No.: 148315 Topic/Issue

Algae in Fresh Water Ecosystem (PDF Available)
Algae in Fresh Water Ecosystem (PDF Available)

15.2 Diversity of Ocean Life & 15.3 Oceanic Productivity
15.2 Diversity of Ocean Life & 15.3 Oceanic Productivity

Surface Mixed Layer Profile of Physical and Biogeochemical
Surface Mixed Layer Profile of Physical and Biogeochemical

... The model mixed layer pCO2 (Figure 3) indicated a distinct temporal variability as the season changes coinciding with the change in sea surface temperature. Also illustrated in Figure 3 is the fact that the model pCO2 generally showed relatively high pCO2 with increasing depth of the ocean. The ocea ...
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Critical Depth

In biological oceanography, 'Critical Depth' is defined as a hypothesized surface mixing depth at which phytoplankton growth is precisely matched by losses of phytoplankton biomass within this depth interval.
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