Effects of a total solar eclipse on invertebrate drift in Snobs Creek, Victoria

1977 ◽  
Vol 28 (6) ◽  
pp. 799 ◽  
Author(s):  
PL Cadwallader ◽  
AK Eden
Keyword(s):  
Light Intensity ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Invertebrate Drift ◽  
Standard Time ◽  
Terrestrial Arthropods ◽  
Diptera Larvae ◽  
Related Increase ◽  
Eastern Standard Time

The effect of the total solar eclipse of 23 October 1976 on invertebrate drift in Snobs Creek, Victoria, was investigated by taking hourly drift samples in two drift nets between 1300 and 2000 h (Eastern Standard Time) on 22, 23 and 24 October. Paramoera fontana (Amphipoda) and terrestrial arthropods exhibited no pattern in their occurrences in the drift. Nymphs of Baetidae (Ephemeroptera) and Trinotoperla (Plecoptera) were rarely found in the drift except after sunset, but exhibited no increase related to the eclipse. Four taxa, namely helodid (Coleoptera) larvae, the larvae of two species of Leptoceridae and one species of Conoesucus (Trichoptera), were more abundant in the drift after sunset and also exhibited an eclipse-related increase in abundance in the drift. Cricotopus (Diptera) larvae were less abundant in the drift after sunset and also exhibited an eclipse-related decrease in abundance in the drift. The results suggest that light intensity has an effect on the occurrence in the drift not only of dark-active invertebrates but also of some light-active invertebrates.

Effects of a total solar eclipse on stream drift

1977 ◽  
Vol 28 (6) ◽  
pp. 793 ◽  
Author(s):  
PJ Suter ◽  
WD Williams
Keyword(s):  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Noticeable Effect ◽  
Standard Time ◽  
Stream Drift ◽  
Eastern Standard Time

Stream drift was recorded in the Acheron River, Victoria, on 23 October 1976. A total solar eclipse occurred at 1640-1643 h (Eastern Standard Time). No noticeable effect on the number or types of animals drifting was observed.

scholarly journals A study of a solar eclipse using a photocell

2004 ◽  
Vol 26 (4) ◽  
pp. 395-399 ◽  
Author(s):  
J.A. Liendo ◽  
G.H. Chacín
Keyword(s):  
Solar Cell ◽  
Light Intensity ◽  
Solar Eclipse ◽  
Solar Disk ◽  
Mathematical Expression ◽  
Total Solar Eclipse ◽  
Detector Response ◽  
Measured Intensity ◽  
Limb Darkening ◽  
Corrected Intensity

In this work we measured light intensity as a function of time during a total solar eclipse using a solar cell. The measured intensity was corrected for the detector response and compared with a mathematical expression that represents the uncovered apparent area of the solar disk as a function of time. By no means, this corrected intensity is linearly related to the uncovered area, this being due to effects such as the solar corona luminosity, the limb darkening and light scattered in the atmosphere. Estimates of the fraction of light that causes this deviation from linearity are given.

scholarly journals Eclipse effects on field crops and marine zooplankton: the 29 March 2006 total solar eclipse

2008 ◽  
Vol 8 (16) ◽  
pp. 4665-4676 ◽  
Author(s):  
G. Economou ◽  
E. D. Christou ◽  
A. Giannakourou ◽  
E. Gerasopoulos ◽  
D. Georgopoulos ◽  
...  
Keyword(s):  
Light Intensity ◽  
Solar Eclipse ◽  
Stomatal Closure ◽  
Decisive Role ◽  
Total Solar Eclipse ◽  
Co2 Uptake ◽  
Night Time ◽  
Photosynthetic Rates ◽  
Marine Zooplankton ◽  
Field Crops

Abstract. Some effects in the biosphere from the Total Solar Eclipse of 29 March 2006 were investigated in field crops and marine zooplankton. Taking into account the decisive role of light on plant life and productivity, measurements of photosynthesis and stomatal behaviour were conducted on seven important field-grown cereal and leguminous crops. A drop in photosynthetic rates, by more than a factor of 5 in some cases, was observed, and the minimum values of photosynthetic rates ranged between 3.13 and 10.13 μmol CO2 m−2 s−1. The drop in solar irradiance and the increase in mesophyll CO2-concentration during the eclipse did not induce stomatal closure thus not blocking CO2 uptake by plants. Light effects on the photochemical phase of photosynthesis may be responsible for the observed depression in photosynthetic rates. Field studies addressing the migratory responses of marine zooplankton (micro-zooplankton (ciliates), and meso-zooplankton) due to the rapid changes in underwater light intensity were also performed. The light intensity attenuation was simulated with the use of accurate underwater radiative transfer modeling techniques. Ciliates, responded to the rapid decrease in light intensity during the eclipse adopting night-time behaviour. From the meso-zooplankton assemblage, various vertical migratory behaviours were adopted by different species.

scholarly journals Eclipse effects on field crops and marine zooplankton: the 29 March 2006 Total Solar Eclipse

2008 ◽  
Vol 8 (1) ◽  
pp. 1291-1320 ◽  
Author(s):  
G. Economou ◽  
E. D. Christou ◽  
A. Giannakourou ◽  
E. Gerasopoulos ◽  
D. Georgopoulos ◽  
...  
Keyword(s):  
Light Intensity ◽  
Solar Eclipse ◽  
Stomatal Closure ◽  
Total Solar Eclipse ◽  
Co2 Uptake ◽  
Night Time ◽  
Endogenous Factors ◽  
Photosynthetic Rates ◽  
Marine Zooplankton ◽  
Field Crops

Abstract. The effects in the biosphere from the Total Solar Eclipse of 29 March 2006 were investigated in field crops and marine zooplankton. Taking into account the decisive role of light on the photoenergetic and photoregulatory plant processes, measurements of photosynthesis and stomatal behaviour were conducted on seven important field-grown cereal and leguminous crops. A drop in photosynthetic rates, by more than a factor of 5 in some cases, was observed, and the minimum values of photosynthetic rates ranged between 3.13 and 10.13 μmol CO2 m−2 s−1. However, since solar irradiance attenuation has not at the same time induced stomatal closure thus not blocking CO2 uptake by plants, it is probably other endogenous factors that has been responsible for the observed fall in photosynthetic rates. Field studies addressing the migratory responses of marine zooplankton (micro-zooplankton (ciliates), and meso-zooplankton) due to the rapid changes in underwater light intensity were also performed. The light intensity attenuation was simulated with the use of accurate underwater radiative transfer modeling techniques. Ciliates, responded to the rapid decrease in light intensity during the eclipse adopting night-time behaviour. From the meso-zooplankton assemblage, various vertical migratory behaviours were adopted by different species.

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

FeXIV Line Emission Polarization of the July 11, 1991 Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 541-547
Author(s):  
J. Sýkora ◽  
J. Rybák ◽  
P. Ambrož
Keyword(s):  
High Resolution ◽  
Solar Corona ◽  
Emission Line ◽  
Solar Eclipse ◽  
White Light ◽  
Preliminary Analysis ◽  
Line Emission ◽  
Total Solar Eclipse ◽  
Degree Of Polarization ◽  
High Resolution Images

AbstractHigh resolution images, obtained during July 11, 1991 total solar eclipse, allowed us to estimate the degree of solar corona polarization in the light of FeXIV 530.3 nm emission line and in the white light, as well. Very preliminary analysis reveals remarkable differences in the degree of polarization for both sets of data, particularly as for level of polarization and its distribution around the Sun’s limb.

The Total Solar Eclipse of June 8, 1918

1917 ◽  
Vol 83 (2145supp) ◽  
pp. 93-93
Author(s):  
Edison Pettit
Keyword(s):  
Solar Eclipse ◽  
Total Solar Eclipse

CHRONOLOGY

2016 ◽  
Vol 45 (2) ◽  
pp. 1-47
Author(s):  
Paul Karolyi
Keyword(s):  
North American ◽  
Peace Process ◽  
Comprehensive Overview ◽  
Standard Time ◽  
Eastern Standard Time

This is part 128 of a chronology begun in Journal of Palestine Studies (JPS) 13, no. 3, (Spring 1984). Chronology dates reflect North American Eastern Standard Time. For a more comprehensive overview of regional and international developments related to the peace process, see the Update on Conflict and Diplomacy in JPS 45(2).

scholarly journals Observations of the solar corona during the total solar eclipse on 21 August 2017

2017 ◽  
Vol 1 (1) ◽  
pp. 68-71 ◽  
Author(s):  
Hui Tian ◽  
◽  
ZhongQuan Qu ◽  
YaJie Chen ◽  
LinHua Deng ◽  
...  
Keyword(s):  
Solar Corona ◽  
Solar Eclipse ◽  
Total Solar Eclipse
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