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Articles 2461 - 2490 of 2527
Full-Text Articles in Entire DC Network
Potentiometric Analysis Of Sea Water Ii. Determination Of Titration Alkalinity, Lloyd E. West, Rex J. Robinson
Potentiometric Analysis Of Sea Water Ii. Determination Of Titration Alkalinity, Lloyd E. West, Rex J. Robinson
Journal of Marine Research
Sea water is alkaline mainly due to the presence of appreciable quantities of carbonate, bicarbonate and borate ions. These react with the H+ from the ionization of water leaving an excess of OH' present….
The Sodium-Chlorinity Ratio Of Ocean Waters From The Northwest Pacific, Rex J. Robinson, Fred W. Knapman
The Sodium-Chlorinity Ratio Of Ocean Waters From The Northwest Pacific, Rex J. Robinson, Fred W. Knapman
Journal of Marine Research
Ocean water is a complex solution of many ions. The concentration of this solution varies considerably from place to place but it has been repeatedly shown that the relative concentration of the ions to each other is remarkably constant….
Relation Of Population Size To Marine Growth And Time Of Spawning Migration In The Pink Salmon (Oncorhynchus Gorbuscha) Of Southeastern Alaska, F. A. Davidson, Elizabeth Vaughan
Relation Of Population Size To Marine Growth And Time Of Spawning Migration In The Pink Salmon (Oncorhynchus Gorbuscha) Of Southeastern Alaska, F. A. Davidson, Elizabeth Vaughan
Journal of Marine Research
In studying the relation of an animal population to its environment it must always be remembered that the population forms part of its own environment. This is due mainly to the influence its size has upon the other elements, both physico-chemical and biotic, of the environment. Allee ( 1931) in his discussion of the harmful effects of crowding upon growth separates the growth retarding factors into two groups namely, the vague and the definite....
Surface Cooling And Streaming In Shallow Fresh And Salt Waters, Alfred H. Woodcock
Surface Cooling And Streaming In Shallow Fresh And Salt Waters, Alfred H. Woodcock
Journal of Marine Research
Experimental work with thermally unstable air and liquids (Mal, 1931; Graham, 1933; Chandra, 1937; and others) has shown that the convection "cells" formed vary with the amoun t of shear, which is introduced either by the fl.ow of the fluid or by the movement of its boundaries. Changes in the flight tactics of free soaring gulls over the open ocean show that the pattern of the convectional up-fl.ow within air moving over warmer water varies with the wind speed (Woodcock, 1940). Since the air over warmer sea water moves in a fashion in part comparable to the experimental findings, it …
Variations In The Phosphorus Content Of Estuarine Waters Of The Chesapeake Bay Near Solomons Island, Maryland, Curtis L. Newcombe, Harry F. Brust
Variations In The Phosphorus Content Of Estuarine Waters Of The Chesapeake Bay Near Solomons Island, Maryland, Curtis L. Newcombe, Harry F. Brust
Journal of Marine Research
Studies by Cowles and Brambel (1938), Newcombe and Lang (1939), and Newcombe, Horne and Shepherd (1939) have provided information on the quantitative methods for estimating inorganic phosphorus and, also, on the vertical and horizontal distribution of this nutrient substance in the waters of the Chesapeake Bay....
On The Annual And Diurnal Variation Of The Evaporation From The Oceans, H. U. Sverdrup
On The Annual And Diurnal Variation Of The Evaporation From The Oceans, H. U. Sverdrup
Journal of Marine Research
The average annual evaporation of the oceans in different latitudes can be considered fairly well established (Mosby, 1936, Wtist, 1936), but so far little is known as to the character of the annual and the diurnal variations. Helland-Hansen (1930) has pointed out that evaporation will be facilitated if the sea surface is warmer than the air, whereas evaporation will decrease or cease if the sea surface is colder....
Observations On The Alkalinity Of Estuarine Waters Of The Chesapeake Bay Near Solomons Island, Maryland, Harry F. Brust, Curtis L. Newcombe
Observations On The Alkalinity Of Estuarine Waters Of The Chesapeake Bay Near Solomons Island, Maryland, Harry F. Brust, Curtis L. Newcombe
Journal of Marine Research
Kolthoff (1926) without particular reference to sea water has defined buffer capacity (alkalinity, in the case of added strong base) of a solution quantitatively as the number of equivalents of added strong base or strong acid required to change the pH of one liter of solution one unit. Buch, in 1930, redefined this concept with reference to sea water as the number of moles of carbonic acid which must be added to one liter of the water in order to change its pH by one unit.
The Great Bahama Bank. Ii. Calcium Carbonate Precipitation, C. L. Smith
The Great Bahama Bank. Ii. Calcium Carbonate Precipitation, C. L. Smith
Journal of Marine Research
The exact mechanism whereby calcium carbonate is precipitated from sea water in shallow tropical seas has attracted the attention of many workers but as yet has not been adequately explained.
Bacteriological Analysis Of Some Long Cores Of Marine Sediments, Sydney C. Rittenberg
Bacteriological Analysis Of Some Long Cores Of Marine Sediments, Sydney C. Rittenberg
Journal of Marine Research
Until recently only the uppermost layers of marine sediments have been generally available for scientific investigations since most coring instruments obtained samples less than a meter long. The early bacteriological investigations of Certes (1884), Russell (1892), Fischer (1894), Gazert (1912), and Drew (1912) were confined to surface samples obtained by dredging. Lloyd (1931) was the first to report quantitative data on the vertical distribution of bacteria in subsurface layers of marine sediments. Similar investigations were made by Reuszer (1933), and Waksman et al. (1933) .
Potential Vorticity As A Conservative Property, V. P. Starr, M. Neiburger
Potential Vorticity As A Conservative Property, V. P. Starr, M. Neiburger
Journal of Marine Research
The problem of tracing actual trajectories of air particles in the free atmosphere, and of water particles in the ocean, h~s been a~tacked for many years without a definitive solution. The mtroduct10n of the isentropic chart in meteorology a few years ago was a great forward step. Corresponding methods have also been applied to oceanography, and it is evident that any advancement made towards the solution of the problem of actual trajectories in either branch of the geophysical sciences must also contribute to its solution in the other field. In its general aspects the problem is therefore common to both …
Convection And Soaring Over The Open Sea, Alfred H. Woodcock
Convection And Soaring Over The Open Sea, Alfred H. Woodcock
Journal of Marine Research
The transfer of momentum between the winds and the sea surface is a fundamental problem of oceanography. In the theoretical treatment of drift currents at sea and of the movements in the turbulent layer of air just above, no consideration seems to have been given to the possibility of a varying pattern of flow under unstable conditions. Recently Langmuir (1938) made measurements of "helical vortices set up by wind" in the surface waters of a lake. Lines of Sargassum weed, which are commonly seen on the central North Atlantic, were mentioned as an indication that similar vortices occur in the …
The Problem Of The Density Of Sea Water, Henry E. Wirth
The Problem Of The Density Of Sea Water, Henry E. Wirth
Journal of Marine Research
The Density of Aqueous Solutions The density of a solution can be determined easily and is of interest not only for its own sake but also in the calculation of other physical quantities. Many investigators have therefore determined the density and concentration of aqueous solutions. Of the older works, those of Kohlrausch, Kohlrausch and Hallwachs, Baxter and Wallace, and Lamb and Lee are outstanding for their precision....
The Motion Of Atmospheric Disturbances On The Spherical Earth, B. Haurwitz
The Motion Of Atmospheric Disturbances On The Spherical Earth, B. Haurwitz
Journal of Marine Research
When the perturbations of the pressure distribution due to rapidly moving cyclones are eliminated by plotting charts of the mea1;1 distribution of the pressure for a number of days, centres of larger dimensions 13,nd of a more permanent character appear, as has been shown by the work carried out by Rossby and his collaborators (7). On winter maps of the northern hemisphere, as a rule at least five of these perturbations are found: the Icelandic and the Aleutian Lows, the Azores, Asiatic and Pacific Highs. They can hardly be considered as mere perturbations of the general circulation, but must rather …
A Statistical Study Of Variation In The Catch Of Plankton Nets, C. P. Winsor, G. L. Clarke Harvard University
A Statistical Study Of Variation In The Catch Of Plankton Nets, C. P. Winsor, G. L. Clarke Harvard University
Journal of Marine Research
Staternent of the Problern.----In a previous communication, Winsor and Walford (1936) analyzed the results of repeated vertical hauls of different types of plankton nets, making use of data available in the literature. They concluded that the observed results could be accounted for reasonably well on the assumptions that (a) the organisms were randomly distributed in the medium and (b) that the volume of medium effectively sampled varied from haul to haul. From this result it follows that as the total catch is increased (as by increasing the net size) the reliability of a population estimate is ultimately limited by variation …
A Detailed Study Of The Surface Layers Of The Ocean In The Neighborhood Of The Gulf Stream With The Aid Of Rapid Measuring Hydrographic Instruments, Athelstan F. Spilhaus
A Detailed Study Of The Surface Layers Of The Ocean In The Neighborhood Of The Gulf Stream With The Aid Of Rapid Measuring Hydrographic Instruments, Athelstan F. Spilhaus
Journal of Marine Research
In an earlier communication in this Journal the writer reported on a Bathythermograph for obtaining continuous records of temperature against depth in the first 150 meters of the ocean (Spilhaus 1937). While further development of this preliminary instrument revealed it to be rather critical to vibration, the results obtained with it, some of which were reported in the paper cited above, were sufficient to indicate the desirability of further studies and development along these lines. Abrupt changes in the vertical temperature distribution with very small changes in horizontal distance together with extremely complex temperature structure in the vertical were observed …
The Effect Of Oxygen Tension On The Rate Of Oxidation Of Organic Matter In Sea Water By Bacteria, Claude E. Zobell
The Effect Of Oxygen Tension On The Rate Of Oxidation Of Organic Matter In Sea Water By Bacteria, Claude E. Zobell
Journal of Marine Research
It is generally recognized that the oxygen consuming capacity of heterotrophic bacteria in water serves as a good criterion of the amount of respirable or oxidizable organic matter in the water. However, the fragmentary literature on the subject records contradictory observations on the effect of oxygen tension upon the rate of bacterial oxidations. For example, Pomeroy (1938) found the amount of oxygen consumed by diluted sewage containing from 0. 7 to 17 .5 cc. of oxygen per liter to be independent of the oxygen tension but Heukelekian (1936) noted the maximum consumption of oxygen in such sewage mixtures containing around …
The Determination Of The Alkalinity Of Sea Water, Thomas G. Thompson, Don H. Anderson
The Determination Of The Alkalinity Of Sea Water, Thomas G. Thompson, Don H. Anderson
Journal of Marine Research
In a previous paper one of us (3) described a _ method for the determination of the alkalinity of sea water-then termed the buffer capacity of sea water. This method was very rapid, eliminated the need for a titration process, and was particularly advantageous when working under rigorous field conditions. However considerable difficulty was sometimes experienced in the preparation of color comparison standards from base-free sea water. The method was later improved by Mitchell and Rakestraw (2). The present paper deals with a modification of the original method. The glass electrode is used for the measurement of excess acid and …
Effect Of Delayed Titration On The Salinity Determination, E. F. Thompson
Effect Of Delayed Titration On The Salinity Determination, E. F. Thompson
Journal of Marine Research
Wlist (1932) has discussed the effect of storage on the chlorinity of samples. He compared the results from samples examined almost immediately at sea with those titrated in the shore laboratory after a considerable period of time. He concludes that there is a definite tendency for the chlorinity to increase on storing. The effect was largest with sample bottles that had been previously titrated and, therefore, no longer full; and least with full bottles on which the stoppers had been covered with paraffin wax. In the case of the incompletely full bottles the mean increase of chlorinity was 0.011 %0 …
The Motion Of Atmospheric Disturbances, B. Haurwitz
The Motion Of Atmospheric Disturbances, B. Haurwitz
Journal of Marine Research
In a recent paper Rossby has discussed the effect of the latitudinal variation of the Coriolis force on the propagation of oceanic and atmospheric disturbances (2). He showed that the velocity c of a disturbance in an incompressible atmosphere on a plane earth when only the effect of the latitudinal variation of the Coriolis force is considered is given with sufficient accuracy by the formula...
Contribution To The Question Of The Equatorial Counter Current, R. B. Montgomery, E. Palmen
Contribution To The Question Of The Equatorial Counter Current, R. B. Montgomery, E. Palmen
Journal of Marine Research
The question of the dynamics of the equatorial counter currents of the several oceans was scarcely brought nearer solution by the research of recent years. The attempt of Sverdrup (1932), which Defant (1935) has further pursued, to explain the counter current as a result of the asymmetry about the equator of the westward-flowing north and south equatorial currents, does not suffice. This may be shown by the following short exposition.
The Great Bahama Bank. I. General Hydrographical And Chemical Features, C. L. Smith
The Great Bahama Bank. I. General Hydrographical And Chemical Features, C. L. Smith
Journal of Marine Research
The Bahama Islands are characterized by the presence of thousands of square miles of shallow sea (<5 fathoms) lying between the various islands. The most extensive of these are the Great Bahama, Little Bahama and Exuma Banks (cf. Fig. 44). A certain amount of discussion has arisen concerning these areas, both in relation to their geological formation and to chemical changes taking place in the water.
Composition Of Sea Water, John Lyman, Richard H. Fleming
Composition Of Sea Water, John Lyman, Richard H. Fleming
Journal of Marine Research
The principle of constant ratios between the salts in ocean water unaffected by land drainage was laid down by Forchhammer in 1864, and firmly established by Dittmar (1884) . Dittmar's examination of 77 samples, collected from all the oceans of the world by H .M.S. Challenger in 1873-76, was so comprehensive, and his results so consistent, that some of his values are used to this day.
Tables Of Sigma-T, Richard H. Fleming
Tables Of Sigma-T, Richard H. Fleming
Journal of Marine Research
It is frequently necessary to plot a1 curves (equal density at zero pressure) as functions of the temperature and salinity. In such cases it is desirable to know the values of temperature and salinity corresponding to even intervals in density….
Notes On The Determination Of Dissolved Oxygen In Sea Water, Thomas G. Thompson, Rex J. Robinson
Notes On The Determination Of Dissolved Oxygen In Sea Water, Thomas G. Thompson, Rex J. Robinson
Journal of Marine Research
The oxygen dissolved in sea water is usually determined by the classical method of Winkler. Probably because of the large number of investigators who have used this method, there have developed various modifications in the method of collecting samples, in the standardization of the sodium thiosulfate solution, and in the titration of the samples. It is the purpose of this paper to discuss these various methods, the sources of possible error, and to present the best procedure for standardization of the sodium thiosulfate solution.
The Determination And Occurrence Of Aluminum In Sea Water, Helmut M. Haendler, Thomas G. Thompson
The Determination And Occurrence Of Aluminum In Sea Water, Helmut M. Haendler, Thomas G. Thompson
Journal of Marine Research
The presence of aluminum ions in sea water has long been an accepted fact, but there are few figures available on the concentrations in which the element exists and in particular under varying conditions….
Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Permanent Centers Of Action Atmosphere And The Displacements Of The Permanent Centers Of Action, C. G. Rossby, H. C. Willett, Messrs. J. Holmboe, J. Namias, L. Page, R. Allen
Relation Between Variations In The Intensity Of The Zonal Circulation Of The Atmosphere And The Displacements Of The Permanent Centers Of Action Atmosphere And The Displacements Of The Permanent Centers Of Action, C. G. Rossby, H. C. Willett, Messrs. J. Holmboe, J. Namias, L. Page, R. Allen
Journal of Marine Research
This paper attempts to interpret, from a single point of view, several at first sight independent phenomena brought into focus through the synoptic investigations carried on at the Massachusetts Institute of Technology during the last few years….
Some Physical Factors Which May Influence The Productivity Of New England's Coastal Waters, C. O'D. Iselin
Some Physical Factors Which May Influence The Productivity Of New England's Coastal Waters, C. O'D. Iselin
Journal of Marine Research
Of recent years physical oceanographers have gradually gained a more satisfactory understanding of the circulation problem. \Yhile it is true that most of this advance has resulted from studying the deep, oceanic currents, nevertheless, the newer principles also can be applied to the more difficult conditions found near the coast....
Consideration Of The Depth Of The Motionless Surface Near The Grand Banks Of New Foundland, Floyd M. Soule
Consideration Of The Depth Of The Motionless Surface Near The Grand Banks Of New Foundland, Floyd M. Soule
Journal of Marine Research
In physical oceanography the admitted limitations of the Bjerknes circulation theorem sometimes are lost sight of and therefore the current trend of inquiring emphasis on these limitations is encouraging. The intelligent interpretation of dynamic calculations and the determination of absolute current directions and velocities therefrom, depend upon a knowledge of the location and shape of a motionless reference surface. In the past the arbitrary selection of isobaric surfaces for reference has been the resort to an approximation found useful in the absence of more definite knowledge regarding the true location and shape of such a motionless surface or surfaces. In …
Sea Level Departures Of The California Coast As Related To The Dynamics Of The Atmosphere Over The North Pacific Ocean, Woodrow C. Jacobs
Sea Level Departures Of The California Coast As Related To The Dynamics Of The Atmosphere Over The North Pacific Ocean, Woodrow C. Jacobs
Journal of Marine Research
Considerable attention is being directed at the present time toward fluctuations in sea level as related to the dynamics of the oceans and, to a lesser degree, the dynamics of the atmosphere. Most of the work along these lines, however, has been concerned with seasonal rather than nonperiodic variations. Nevertheless, an analysis of sea level data compiled over a period of many years at four California tidal stations indicates that non-periodic fluctuations of considerable magnitude also occur. Since these fluctuations are probably the direct or indirect result of variations in certain meteorological elements, it becomes of interest to investigate the …
A Discussion Oof Physical Factors Governing The Distribution Of Microorganisms In The Atmosphere, Woodrow C. Jacobs
A Discussion Oof Physical Factors Governing The Distribution Of Microorganisms In The Atmosphere, Woodrow C. Jacobs
Journal of Marine Research
The preceding paper by Rittenberg, together with the number of articles on the same subject which have appeared recently, indicate an ever increasing interest on the part of biologists in the atmosphere as a medium for the dispersal of bacteria, molds, spores and pollens. Meteorologists, on the other hand, are interested in the results of such biological investigation to the extent that they show certain mixing processes within the atmosphere and the movements of air masses. In view of the large quantity of data which has already been accumulated by the biologists, it becomes of considerable interest to consider some …