See if you can find any resemblance at all to the standard “tidal bulge” model. The video link below shows how complex tides are. The lines rotate, intermeshing with each other like gears. These radiating lines of equal tidal phase connect with those from the next AP. Tides radiate out from these points, getting larger the further the radius from the nearest AP. There are numerous points on earth which experience no tidal range, called Amphidromic Points. However, Earth is nothing like this hypothetical planet and real tides behave nothing like the model. The neap tides occur during the first and last quarter phases of the Moon, when the Moons orbit around Earth brings it perpendicular to the Sun. This gives the typical diagram that explains diurnal tides: 22) 23) What conditions are required for a solar eclipse A) The phase of the Moon must be new, and the Moon's orbital plane must lie in the ecliptic. E) The Moon rotates synchronously with its revolution about Earth. D) The orbital plane of the Moon is tilted by about 5 to the ecliptic plane. The usual simple modeling of tides assumes an oceanic earth with no continents and uniform depth of oceans. C) The Moon is the primary cause of tides on Earth. The highest tides of the year are middle of Northern Hemisphere winter because that's when the earth's orbit is closest to the sun. Highest monthly tides are during a new or full moon since the sun and moon combine their gravitational attraction in line with the earth. The New Moon's gravity does create tides, and tides at New moon are as large as the tides at Full moon, and larger than the tides at half moon. So you are not correct to say that tides are higher on the day of Full moon. It comes from an old English word meaning "to bulge" The tide "bulges" during New and Full moon. You get Spring tides every New and every Full moon. Note the name "Spring tide" is not from the season. The size of the tide on a particular day at a particular location is strongly affected by the local shape of the coast and sea floor, Some places only have one tide each day, or tides of different size, due to these effects. When the moon is at first quarter, or third quarter (ie a half moon), the solar tide and the lunar tide are acting against each other, and you get a "neap tide" with a lower range than a spring tide. When the moon is full or the moon is new, the Earth, Moon and Sun are roughly aligned, and the Lunar tide combines with the Solar tide to give a "Spring tide" that has a larger range. There are two main gravitational causes of tides: the Moon, and to a lesser extent the Sun.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |