Surface Water Temperatures of the Canadian Atlantic Coast

1939 ◽  
Vol 4b (5) ◽  
pp. 378-391 ◽  
Author(s):  
H. B. Hachey
Keyword(s):  
Surface Water ◽  
General Type ◽  
Atlantic Coast ◽  
Smooth Curve ◽  
Temperature Curve

Monthly mean surface water temperatures, based on observations from 1926 to 1935 are used to determine normal monthly mean temperatures for eight points on the Canadian Atlantic coast. Sine curves are found to fit the data for all points, with one exception. The general type of temperature curve determined by daily observations divides the regions of observation into those represented by a smooth curve, those by an erratic type, and those showing sharp but regular changes in temperatures from day to day.

The magnetic susceptibilities of platinum, rhodium and palladium from 20 to 290° K

1952 ◽  
Vol 212 (1108) ◽  
pp. 137-148 ◽  
Keyword(s):  
Temperature Variation ◽  
Rapid Determination ◽  
Smooth Curve ◽  
Temperature Curve ◽  
Experimental Results ◽  
Mean Deviation ◽  
Magnetic Susceptibilities ◽  
Light Passing ◽  
Regular Increase

An apparatus is described which makes possible the rapid determination of the temperature variation of the magnetic susceptibilities of small solid specimens. The deflexions of a beam of light passing through a Sucksmith balance are recorded photographically. The temperature of the specimen, measured by a Au-Co/Ag-Au thermocouple in contact with it, is initially reduced to 20° K and deflexions are recorded at small intervals of temperature as the temperature of the specimen rises to 290° K. The whole temperature range can be covered in 4 h. The mean deviation of single measurements from the best smooth curve passing through them is less than 0.2 % of the mass susceptibility of the specimens. The apparatus has been used to measure the temperature variation of the susceptibilities of spectrographically standardized specimens of platinum, rhodium and palladium. Measure­ments on three pure palladium specimens show a maximum in the susceptibility temperature curve at 80° K. The experimental results for platinum show a change in the curvature of the susceptibility temperature curve below 90° K, the susceptibility increasing more rapidly as the temperature decreases. The experimental results for rhodium show a regular increase of susceptibility with increase of temperature. The results for palladium are discussed in relation to the collective electron treatment of metals, and assuming a parabolic distribution of energy states in the d band, estimates are made of the effective Fermi-Dirac degeneracy temperature θ F , the number of holes per atom, q , and the exchange interaction energy θ' . The estimated values are θ F = 1020° K, q = 0.29, θ' = 554.0° K. Similar estimates are made in the case of platinum, the values being θ F =1750° K, q = 0.25, θ' = 770° K.

scholarly journals FUJITA DECOMPOSITION AND MASSEY PRODUCT FOR FIBERED VARIETIES

2021 ◽  
pp. 1-29
Author(s):  
LUCA RIZZI ◽  
FRANCESCO ZUCCONI
Keyword(s):  
General Type ◽  
Structure Theorem ◽  
Smooth Curve ◽  
Local System ◽  
Base Change ◽  
Smooth Variety ◽  
Massey Product

Abstract Let $f\colon X\to B$ be a semistable fibration where X is a smooth variety of dimension $n\geq 2$ and B is a smooth curve. We give the structure theorem for the local system of the relative $1$ -forms and of the relative top forms. This gives a neat interpretation of the second Fujita decomposition of $f_*\omega _{X/B}$ . We apply our interpretation to show the existence, up to base change, of higher irrational pencils and on the finiteness of the associated monodromy representations under natural Castelnuovo-type hypothesis on local subsystems. Finally, we give a criterion to have that X is not of Albanese general type if $B=\mathbb {P}^1$ .

scholarly journals Offshore distribution patterns of the cyanobacterium Trichodesmium erythraeum ehrenberg and associated phyto- and bacterioplankton in the southern Atlantic coast (Paraná, Brazil)

2006 ◽  
Vol 49 (2) ◽  
pp. 323-337 ◽  
Author(s):  
Adriana Siqueira ◽  
Hedda Elisabeth Kolm ◽  
Frederico Pereira Brandini
Keyword(s):  
Surface Water ◽  
Atlantic Coast ◽  
Bacterial Biomass ◽  
Distribution Patterns ◽  
High Light ◽  
Sampling Area ◽  
Trichodesmium Erythraeum ◽  
Anabaena Sp ◽  
Pennate Diatoms ◽  
Total Bacteria

Studies were carried out on Thrichodesmium erythraeum occurring on the inner shelf in the state of Paraná, Brazil. Temperature, salinity, rainfall, wind velocity, total bacteria, bacterial biomass, chlorophyll-a, phytoplankton, Anabaena sp., Merismopedia sp. and T. erythraeum densities were measured in surface water. Centric and pennate diatoms, Anabaena sp. and Merismopedia sp. were most abundant at 15 m isobath, while dinoflagellate abundance was relatively constant among stations. Similarly, total bacterial densities were relatively homogeneous throughout the sampling area, suggesting that blooms of T. erythraeum were not yet in the senescent phase. Results showed that T. erythraeum was capable of surviving in relatively inhospitable environmental conditions, due to its ability to fix nitrogen and to photosynthesis at high light intensities.

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