Talk:Diathermancy

Diathermancy is something quite different from diathermy

See the article es:diatermancia on the Spanish WP, --Fev (talk) 22:06, 31 March 2008 (UTC)

Atmospheric pressure and winds

The wind direction depends, generally speaking, on atmospheric pressure. It is something very well known that wind goes from higher pressure places (anticyclones) to areas with lower pressure (barometric depressions or cyclones). What is not so obvious and therefore is often reason of error, is that there are two types of cyclones and anticyclones: those with dynamic origin (motivated as a result of the movement of Earth's rotation) and the unequal repartition of solar heat on the Earth’s surface. In the first case, the resulting winds have a very long and steady run (thousands of km) therefore called constant or planetary winds such as trade winds and westerlies, while in the second case, the journey is much shorter (hundreds of km) and both cyclone and anticiclone are developed in roughly the same area: hotter air climbs up because it is less dense and forms a strong convection cloud (the anticyclone (high pressure) and depression (low pressure) almost in the same place, standing the anticyclone on top, as it is obvious by a simple law of physics, the cyclone goes up by convection and depression down because first low pressure occurs, thereby amounted hot air at high altitudes and on cooling may form a cloud, even reaching a level where the air around this cloud is much heavier, which down the edges to fill at ground level or sea surface The kind of vacuum created by rising hot air. The process of vertical movement of rising air by heating at the surface is called convection and the subsequent rain showers convection, while the downward movement of the air after cooling and forming a compensation convection is called atmospheric subsidence. The same happens when a pan of water heated: rises in the center (where the heat of the stove or fire is concentrated) and down the sides (where the pot on contact with air temperature cools down). This high pressure area (anticyclone) always accompanies all barometric depressions on top. --Fev 03:30, 22 September 2015 (UTC) — Preceding unsigned comment added by Fev (talk • contribs)

Atmospheric heating from oceanic waters

Note: this article is being translated from the Spanish Wikipedia (with Google Translate). However, this translation need to be improved before changing the article itself

The heat transport capacity by a fluid obviously depends on the mass of the fluid: the higher the mass, the greater its ability to absorb and transport heat. Since the mass of ocean water is much higher than that of the atmosphere it is logical to assume that the oceans are responsible for the enormous flow of heat between the tropics and the temperate and polar zones. The problem here is that it is difficult to differentiate quantitatively the amount of heat absorbed directly by the atmosphere from solar radition (almost negligible, depending on dust and water molecules in vapor form or in suspension) and through the heat reflected by the continents, both sources compared to the absorbing atmospheric heat from the ocean.

The best example of the ability of the ocean to supply heat to the atmosphere through the hydrological cycle, as water evaporation and subsequent condensation to form clouds and finally, the precipitation returns to the earth's surface heat previously absorbed we exemplifies an animated video made by NASA's lluviosidad caused by the hurricane season of 2012 (3).

We should not underestimate the role of ocean currents in the flow of heat from the equatorial latitudes to the temperate and polar, as has sometimes been done. This is an obvious mistake, and shows the difficulty in comprehensive understanding of the subject here treated by the average citizen and even researchers and scientists in atmospheric and oceanographic issues. A very clear example can be seen in satellite images of certain intertropical zones: when ocean currents from the east pass between two islands and are much warmer waters usually form rosaries or alignments of clouds contrast in temperature, the same way that contrails of jets are formed.

Moreover, the circulation of constant winds coincides roughly with the ocean currents, which could mask the mutual influence between the liquid and the gas in the earth's surface. This mutual influence has two important events: on the one hand, the warm ocean currents are responsible for the enormous amount of heat transferred to the western coasts of Europe and North America in the temperate and polar latitudes. These constant winds (westerlies) absorb that heat (in the form of clouds) of the surface waters of the Gulf Stream current in the Atlantic and Kuroshio in the Pacific. And in reverse, the coincidence of the trade winds from the northeast and southeast with the equatorial currents of the northern and southern hemispheres, respectively, speeds, on the one hand, the upwelling of cold deep water (cold streams) on the western shores of the continents (current of the Canary and California in the northern hemisphere and of Benguela and Peru in the southern hemisphere) since the proceed winds of Africa and South America a few small waves of very shallow translational created westward and that translation, in part, causes the suction explains that upwelling. However, it should be noted that this upwelling of cold water on the western coasts of continents is due not only to the direction of the trade winds in the tropics, but the direction of ocean waters in the abyssal zone (of west to east, like the Earth in its rotation) when the inclined plane of the continental slope and immediate to the coast of Africa and South America fringes, require deep water to emerge along the coast. In other words: the waters of the ocean floor accompany the solid part of the lithosphere in the rotation movement, virtually no coasting due to the enormous pressure they support. But to get those waters off the coast of West Africa, here yes by inertia, they tend to follow the movement they had in the background but are forced to rise by decreasing depth. This is the main reason why those waters of deep origin are very cold. It is necessary to make this clarification because in the analysis of the cold currents of the intertropical zone has been cited as the origin of such water, in many works on the subject, currents from the polar regions, which is a mistake. The current Humboldt or Peru, for example, might not have an Antarctic origin, because between the coasts of Peru and Antarctic currents are eastbound, but temperate or warm waters. Much more so it could cite the case of the cold currents in the northern hemisphere (Labrador currents, Oyashio, California and, especially, the Canary current). In the case of this last current (Canary Islands), for example, would be impossible for the coldness of the water came from the polar latitudes of the Northern Hemisphere since, between the latitude of the Canaries and the Arctic polar region is through the huge Gulf stream, which is warm water, much less could come from the Antarctic area, as there is in between the huge equatorial current from east to west which is also warm water. — Preceding unsigned comment added by Fev (talk • contribs) 13:10, 13 September 2016 (UTC)