CORRELATIONS BETWEEN PERIODICITIES IN GERMINATION OF CHENOPODIUM BOTRYS AND VARIATIONS IN SOLAR RADIO FLUX

1967 ◽  
Vol 45 (7) ◽  
pp. 1105-1113 ◽  
Author(s):  
Bruce G. Cumming
Keyword(s):  
Solar Radio ◽  
Barometric Pressure ◽  
Lunar Cycle ◽  
Solar Flux ◽  
Sunspot Activity ◽  
Fluorescent Light ◽  
Percentage Germination ◽  
Radio Flux ◽  
Solar Radio Flux ◽  
Exogenous Factors

There were pronounced fluctuations in the percentage germination of seeds of Chenopodium botrys that were kept stored in darkness under carefully controlled conditions of temperature, humidity, and barometric pressure. Germination tests were conducted over a period of more than 2 years in controlled environment cabinets at 30 °C with different photoperiods supplied by fluorescent light. The fluctuations in percentage germination showed no evident correlation with the following factors: relative humidity, barometric pressure, lunar cycle, magnetic intensity.There were highly significant correlations between the fluctuations in germination and solar radio flux (10.7 cm wavelength, indicative of sunspot activity). The best positive correlation between values for solar radio flux and percentage germination suggested that the effect of solar flux on germination (whether direct or indirect) was greatest during the week immediately preceding the wetting of seeds. Periodogram analyses of the periodicity of percentage germination and solar flux has provided two periodograms which have corresponding peaks, showing that the component periods for solar flux are practically the same as those for germination. It cannot yet be stated whether these correlations were indicative of a direct effect of solar radio flux on germination. The present evidence affirms the contention that largely unexamined exogenous factors may influence rhythmic biological processes.

scholarly journals WINDII Observations and WACCM‐X Simulations of High‐Latitude Winds Under Different Solar Radio Flux and Geomagnetic Disturbance Conditions

2019 ◽  
Vol 124 (7) ◽  
pp. 6087-6096
Author(s):  
Shushi Liu ◽  
Gordon G. Shepherd ◽  
Yongsheng Chen ◽  
Marianna G. Shepherd ◽  
Sangay Bhutia
Keyword(s):  
High Latitude ◽  
Solar Radio ◽  
Geomagnetic Disturbance ◽  
Radio Flux ◽  
Solar Radio Flux

Absolute calibration of solar radio flux density at 9375 MHz

1992 ◽  
Vol 16 (1) ◽  
pp. 112
Author(s):  
Zhou Shu-rong ◽  
Xu Fu-ying ◽  
Yu Xing-feng
Keyword(s):  
Flux Density ◽  
Solar Radio ◽  
Absolute Calibration ◽  
Radio Flux ◽  
Solar Radio Flux

scholarly journals A deep learning approach to solar radio flux forecasting

2021 ◽  
Author(s):  
Emma Stevenson ◽  
Victor Rodriguez-Fernandez ◽  
Edmondo Minisci ◽  
David Camacho
Keyword(s):  
Deep Learning ◽  
Solar Radio ◽  
Learning Approach ◽  
Radio Flux ◽  
Solar Radio Flux

scholarly journals Quasi-Periodicity in global solar radio flux at metric wavelengths during Noise Storms

Solar Physics ◽  
2004 ◽  
Vol 222 (2) ◽  
pp. 311-322 ◽  
Author(s):  
G.A. Shanmugha Sundaram ◽  
K.R. Subramanian
Keyword(s):  
Solar Radio ◽  
Radio Flux ◽  
Solar Radio Flux

Reconstruction of the Annual Variation in Solar Radio Flux and the Catania Sunspot Area from Tree Ring-index Time Series

1994 ◽  
Vol 11 (2) ◽  
pp. 164-169
Author(s):  
J. O. Murphy ◽  
H. Sampson ◽  
T. T. Veblen ◽  
R. Villalba
Keyword(s):  
Time Series ◽  
Tree Ring ◽  
Solar Radio ◽  
Annual Variation ◽  
Sunspot Area ◽  
Radio Flux ◽  
Proxy Data ◽  
Solar Radio Flux ◽  
Index Site ◽  
Index Time Series

AbstractFour tree ring-index site chronologies, representing standardised annual growth rates for spruce trees growing at high altitude sites in Colorado, have been employed as proxy data in a regression model for the annual variation of solar radio flux at 2800 MHz (F10·7) and the Catania sunspot area (Ac). These dendrochronological time series all exhibit significant power spectrum peaks at about 11 years and separately correlate with the annual values of Rz, F10·7 and Ac, as solar activity indicators. The two models constructed give the cyclic variation of F10·7 and Ac back to AD1673.

scholarly journals Galactic Cosmic Ray Modulation Up to Recent Solar Cycles

2011 ◽  
Vol 48 (4) ◽  
pp. 66-70
Author(s):  
R. Agarwal ◽  
R. Mishra
Keyword(s):  
Solar Cycle ◽  
Solar Radio ◽  
Cosmic Ray ◽  
Radio Flux ◽  
Solar Cycles ◽  
Cosmic Ray Intensity ◽  
Cosmic Ray Modulation ◽  
Solar Radio Flux ◽  
Yearly Average ◽  
Galactic Cosmic Ray

Galactic Cosmic Ray Modulation Up to Recent Solar Cycles Cosmic ray neutron monitor counts obtained by different ground-based detectors have been used to study the galactic cosmic ray modulation during the last four solar activity cycles. Since long, systematic correlative studies have been per-formed to establish a significant relationship between the cosmic ray intensity and different helio-spheric activity parameters, and the study is extended to a recent solar cycle (23). In the present work, the yearly average of 10.7 cm solar radio flux and the interplanetary magnetic field strength (IMF, B) have been used to find correlation of the yearly average cosmic ray intensity derived from different neutron monitors. It is found that for four solar cycles (20-23) the cosmic ray intensity is anti-correlated with the 10.7 cm solar radio flux and the IMF, B value with some discrepancy. However, this is in a good positive correlation with the flux of mentioned wavelength for four different solar cycles. The IMF, B shows a weak correlation with cosmic rays for solar cycle 20, and a good anti-correlation for solar cycles 21-23.

scholarly journals Statistical Study of Nine Months Distribution of Solar Flares

2014 ◽  
Vol 33 ◽  
pp. 1-11
Author(s):  
Zety Sharizat Hamidi ◽  
N.N.M. Shariff ◽  
C. Monstein
Keyword(s):  
Solar Flares ◽  
Solar Radio ◽  
Weather Prediction ◽  
The United States ◽  
United States Department ◽  
The Sun ◽  
Radio Flux ◽  
Solar Radio Flux ◽  
Field Lines ◽  
Relationship Of

Solar flare is one of the solar activities that take place in the outermost layer of the corona. Solar flares can heat the material to several million degrees in just a few minutes and at the same time they release the numerous amount of energy. It is believed that a change of magnetic field lines potentially creates the solar flares. The objectives of the study are to identify and compare the types of solar flares (in X-Ray) region and to improve understanding of solar flares. Data are taken from the NOAA website, from the United States Department of Commerce, NOAA, Space Weather Prediction Center (SPWC). Solar radio flux readings were merged together with the three classes and a total of nine graphs were plotted. In illustrating the relationship of solar radio flux and solar flares, it can be explained by studying the range values of flux corresponding to flares values. From this case study, it was found that the minimum value of solar radio flux in order for the flares to occur is equivalent 68 x 10-22Wm-2Hz-1. Thus, whenever the values of solar radio flux are high, there should be a higher number of flares produced by the sun. The overall range of solar radio flux recorded in this study ranging from 68 x 10-22 Wm-2Hz-1 to 96 x 10-22 Wm-2Hz-1. Observing and collecting data from the Sun and develop our very own new prediction methods will leads the accuracy of the prediction of the behavior of the Sun more precisely.

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