scholarly journals Relation between Short-Term and Long-Term Variations of Precipitation

Climate ◽  
2017 ◽  
Vol 5 (4) ◽  
pp. 96
Author(s):  
Klemens Hocke
Keyword(s):  
Short Term ◽  
Long Term Variations

Radial Velocity Variability of K Giants

1991 ◽  
Vol 130 ◽  
pp. 386-388
Author(s):  
Artie P. Hatzes ◽  
William D. Cochran
Keyword(s):  
Radial Velocity ◽  
Active Regions ◽  
Peak Amplitude ◽  
Short Term ◽  
Rotational Modulation ◽  
Surface Active ◽  
Radial Velocity Data ◽  
Long Term Variations ◽  
K Giants

AbstractAt McDonald Observatory we have been monitoring the relative radial velocities of a sample of K giants. The technique employed uses the telluric O2 lines near 6300 Å as a reference for measuring the stellar line shifts. We demonstrate that precisions of 10 m s−1 are possible with this technique. We present radial velocity data covering a 2 year time span for α Boo, α Tau, and β Gem. All of these stars show both long term variations (~ several hundred days) with a peak-to-peak amplitude of about 400 m s−1 and short term variations (~ few days) with a peak-to-peak amplitude of about 100 m s−1. The long term variations may be due to the rotational modulation of surface active regions whereas the short term variations may be indicative of pulsations.

Morphology and Pipeline Design Through a Dynamic Landfall Area: The Black Sea Pipeline Case

2002 ◽  
Author(s):  
Z. Chen ◽  
Marco Venturi ◽  
R. Bijker
Keyword(s):  
Sediment Transport ◽  
Environmental Impact ◽  
Black Sea ◽  
Morphological Changes ◽  
The Black Sea ◽  
Burial Depth ◽  
Short Term ◽  
Pipeline Route ◽  
Long Term Variations

The Blue Stream pipeline project is a gas transportation system for the delivery of processed gas from a gas station in the southern Russia across the Black Sea to Ankara, Turkey. The Turkish landfall of the offshore pipeline in the Black Sea is located near Samsun, see Figure 1 for the pipeline route. One of the main aspects of the design of pipeline through a morphologically dynamic area such as landfall is the required burial depth (Chen et al, 1998, 2001 and Bijker et al 1995). The burial depth is the result of an optimisation between: • safety of the pipeline (which often requires a large burial depth), and • environmental impact and trenching costs (a small burial depth means less dredging and less environmental impact). This paper presents a method of predicting the future extremely low seabed level in a morphologically dynamic landfall area, which is required to determine the burial depth of the pipeline. Both short term and long term coast evolution were assessed to quantify the expected lowest seabed level along the pipeline route in the landfall area during the pipeline lifetime of 50 years. The results were used to determine the required pipeline burial depth. The long term morphological changes originate from long term variations in the morphological system (e.g. river input), gradient in the longshore sediment transport and long term variations in the hydrodynamic conditions. The short-term morphological changes originate from beach profile variations due to cross-shore sediment transport as a result of seasonal and yearly variations in the wave and current conditions. Numerical modelling was applied to compute the longshore and cross-shore sediment transport rates and the resulting coastline evolution and cross-shore profile evolution. The longshore transport model was validated using the available data on the coastline changes in the past 20 years, which was derived from the satellite images. The 50-year lowest seabed level has been determined as the sum of the coastline retreat and the cross-shore evolution in the next 50 years.

Animal Protein and Rational Choice: Diet in the Eighteenth Century

2014 ◽  
Vol 44 (4) ◽  
pp. 427-452 ◽  
Author(s):  
Martin Bruegel ◽  
Jean-Michel Chevet ◽  
Sébastien Lecocq
Keyword(s):  
Eighteenth Century ◽  
Rational Choice ◽  
Choice Model ◽  
Meat Consumption ◽  
Short Term ◽  
Rational Choice Model ◽  
Elite Status ◽  
Changing Patterns ◽  
Long Term Variations

Analysis of the account books of the convent school of Saint-Cyr between 1688 and 1788 reveals the causes of the institution's changing patterns of meat consumption. Although a rational-choice model can explain short-term variations in the school's diet, economic variables alone are not sufficient to explain its long-term variations, as evolving tastes began to infiltrate Saint-Cyr's traditional, aristocratic diet. The unintended side effect of this development was to improve nutrition, which the school managed to do without running afoul of claims to elite status.

scholarly journals Ambiguities in the classification of Cochin Estuary, West Coast of India

2013 ◽  
Vol 10 (3) ◽  
pp. 3595-3628 ◽  
Author(s):  
A. Shivaprasad ◽  
J. Vinita ◽  
C. Revichandran ◽  
N. T. Manoj ◽  
K. V. Jayalakshmy ◽  
...  
Keyword(s):  
Data Sets ◽  
Dry Period ◽  
Cochin Estuary ◽  
Short Term ◽  
Classification Schemes ◽  
Biological Features ◽  
High Runoff ◽  
Long Term Variations

Abstract. Cochin Estuary is a unique complex system along Indian coastline with a widespread area at the upstream. The fluctuations in salinity are of extreme kind ranging from entirely riverine to entirely saline. The high runoff months are characterized by monsoonal spells causing intense flushing. During the peak dry period, the runoff is less but steady providing a stable environment. River runoff is controlled by short term variations rather than long term variations. Using large comprehensive data sets, an attempt is made to evaluate several classification schemes for the estuary. The existing methods proved to be insufficient to represent the real salient features of this typical estuary. Arguments are also presented to illustrate the confusion in the names by which the estuary is commonly known. Therefore, a new nomenclature is proposed as "Cochin Monsoonal Estuarine Bay" embodying the physiographic, hydrographic and biological features of the estuary.

scholarly journals A Transient Shock-Wave in the Shell of the Be Star HD 184279

1987 ◽  
Vol 92 ◽  
pp. 95-98
Author(s):  
D. Ballereau ◽  
J. Chauville
Keyword(s):  
Shock Wave ◽  
Radial Velocity ◽  
Emission Spectrum ◽  
Short Term ◽  
Balmer Series ◽  
Spectroscopic Observations ◽  
The Past ◽  
Be Star ◽  
Long Term Variations

HD 184279 (V1294 Aql) has presented in the past an emission spectrum on the first terms of the Balmer series, and shell absorptions on the hydrogen and neutral helium lines. Their variations have been reported by Merrill (1952), Merrill and Lowen (1953) and Svolopoulos (1975). Ballereau and Hubert-Delplace (1982) evidenced long-term V/R variations with an amplitude of ∼100 km s-1. Short-term photometric variations are irregular (Tempesti and Patriarca, 1976), while long-term variations are correlated with radial velocity (RV) of shell lines (Horn et al., 1982). Ballereau and Chauville (in preparation) extended the spectroscopic observations until 1984 and confirmed the pseudo-periodic variations, the last half-period ranging over 3.4 years (April 1, 1980-August 1, 1983).

scholarly journals Gear-Type Glide-Meter as an Instrument For Forecasting Full-Depth Avalanches

1980 ◽  
Vol 26 (94) ◽  
pp. 521-521
Author(s):  
Yutaka Yamada
Keyword(s):  
Relative Frequency ◽  
Field Measurements ◽  
Short Term ◽  
Term Variation ◽  
Long Term Variations ◽  
Angle Of Rotation

AbstractThis paper is concerned with the variation of snow glide and its predictability in full-depth avalanches. From field measurements of snow glide using a newly developed gear-type glide-meter which is fixed to the ground and which measures the amount of glide as the angle of rotation of a gear, the following characteristics are deduced: (1) the variation of gliding rate is composed of both short-term and long-term variations, and (2) the existence of correlation between the short-term variation and the relative frequency of avalanches is recognized.

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