The Secchi disk (or Secchi disc), as created in 1865 by Angelo Secchi, is a plain white, circular disk 30 cm (12 in) in diameter used to measure water...

his spectral classes. Secchi was active in oceanography, meteorology, and physics, as well as astronomy. He invented the Secchi disk, which is used to measure...

crater) Secchi (Martian crater) Secchi depth, a measure of turbidity Secchi disk, an instrument used to measure turbidity SECCHI (Sun Earth Connection Coronal...

measure Secchi depth, a white or black-and-white disk is mounted on a pole or line and lowered slowly down in the water. The depth at which the disk is no...

measured using a Secchi disk. This black and white disk is lowered into the water until it can no longer be seen; the depth (Secchi depth) is then recorded...

monitoring data has been collected since 1974, including 29 years of secchi disk transparencies, 23 years of total phosphorus (TP) data, 20 years of chlorophyll-a...

use it to generate electricity. Water clarity in the lake is low, with secchi disk measurements averaging less than 3 meters. Fish in the lake that are...

Secchi classes and been progressively modified as understanding improved. During the 1860s and 1870s, pioneering stellar spectroscopist Angelo Secchi...

light interacts with a so-called Secchi Disk that is used to measure the transparency of lake and ocean waters. The disk had been invented in the mid-nineteenth...

using a Secchi disk, a 20-cm (8 in) disk with alternating white and black quadrants. The depth at which the disk is no longer visible is the Secchi depth...

vessel. The method is often used in conjunction with the Secchi disk submerged to half the Secchi depth, so that the color can be judged against a white...

of Secchi's Contribution to Marine Optics and the Foundation of Secchi Disk Science". Oceanography. 33 (3). doi:10.5670/oceanog.2020.301. Secchi, A.;...

500 ppm). It is one of the most transparent lakes in the world, with a Secchi disk visible more than 35 m (115 ft) deep. The lake has no inlets or apparent...

dictionary. Biomass (ecology) Eutrophication Nonpoint source pollution Secchi disk Surface runoff Trophic level Trophic level index, a similar measure used...

world because of the absence of pollutants. Clarity readings from a Secchi disk have consistently been measured as being 120 ft (37 m), which is very...

Eutrofication from residential development of the shoreline has reduced Secchi disk depth to 4 meters, and dead algae has reduced oxygen levels in deep water...

2011. "Cyanobacteria: Microcystis". The Silica Secchi Disk. Connecticut College: The SilicaSecchi Disk. Archived from the original on 26 March 2008. Retrieved...

try to one up each other. It's a trend in the same vein as planking." Secchi disk Landmark point Carter, Ashley R.; King, Gavin M.; Ulrich, Theresa A.;...

PMID 28073480. "Cyanobacteria: Microcystis". The Silica Secchi Disk. Connecticut College: The SilicaSecchi Disk. Archived from the original on March 26, 2008....

basic chemical information was collected, in addition to eight years of Secchi Disk Transparencies (SDT). In summary, the water quality of Schoodic Lake...

oxygen, conductivity, oxygen reduction potential (ORP), turbidity, and Secchi disk depth. Water pollution is a major global environmental problem because...

percent. The reflectance percentage can be correlated to attenuation, Secchi disk depth or total suspended solids although the exact relationship will...

river Color of water Dissolved organic carbon (DOC) Ocean turbidity Secchi disk Hoge, FE; Vodacek, A; Swift, RN; Yungel, JK; Blough, NV (October 1995)...

microsiemens per centimetre. Turbidity was measured at 13 centimetres by the Secchi disk method. At this point of reference, flows are generally of the order...

area. In 1940, researchers measured a Secchi disk depth of 35 feet (11 m). Studies in the early 1970s found Secchi clarity ranging from 14 feet (4.3 m)...

lake sports a 9 ft 2 in – 34 ft 9 in (2.8–10.6 m) annual depth range in Secchi disk-measured water visibility from 1981 to 2020. As of 2019, there were 16...

taken every weekday morning, the turbidity is measured (e.g. using a Secchi disk) and other parameters are recorded. The North Sea warmed by 1.65 °C since...

test Crashworthiness Euro NCAP Safety car Mannequin Crash simulation Secchi disk, the characteristic test-dummy fiducial marker symbol. Nick Kurczewski...

308f..40M. doi:10.1038/scientificamerican0613-40. PMID 23729069. Secchi Disk and Secchi app, a citizen science project to study the phytoplankton Ocean...

theory of spontaneous generation. 1865 – Astronomer Angelo Secchi demonstrates the Secchi disk, which measures water clarity, aboard Pope Pius IX's yacht...