Monday, April 08, 2013

Hypothermia Vs hyperthermia

All in a day's time, from Hypothermia to hyperthermia from the state of being Frozen to the state of evoprating

Though it is spring in the west, still it is snowing and freezing cold, while in the East especially in India, it is exceptionally hot in the south, as it would be in the deserts!!! It was burning hot as I got out of the airport, Goshh.....

As we were walking from Hotel to office at Bonn, Veba said it was warmer in Germany when compared to Moscow, while for us it was very Cold (Though the temparature was higher than in London, we did not feel it to be severe as there was no Wind, like in London).

Also was wondering and had even asked Farida, why the water in Thames would not Freeze?

Indeed it is because of the deeds of human being!

Normal human body temperature in adults is 34.4–37.8 °C (94–100 °F).[8] Sometimes a narrower range is stated, such as 36.5–37.5 °C (98–100 °F).[9] Hypothermia is defined as any body temperature below 35.0 °C (95.0 °F).

 It is subdivided into four different degrees,
mild 32–35 °C (90–95 °F);
moderate, 28–32 °C (82–90 °F);
severe, 20–28 °C (68–82 °F); and
 profound at less than 20 °C (68 °F).[10]
This is in contrast to hyperthermia and fever which are defined as a temperature of greater than 37.5 °C (99.5 °F)-38.3 °C (100.9 °F).
The difference between fever and hyperthermia is the mechanism
Why so much of extremity in the climatic condition?

Ocean Temperature & Sun


•Virtually all the ocean heat comes from the sun. A minute amount comes from the earth's interior through gas vents at the ocean bottom.

•Because the equatorial areas are more faced toward the sun, the amount of heat absorbed per unit area is larger than at the poles. This causes the temperature to be higher at the equator than at the poles.

•The area of higher temperature shifts southward and northward with the season.

•The change from warmer equatorial areas to colder polar areas occurs largely in the form of fronts (=large transitions).

•The maximum mean monthly temperature is approximately 30 degrees, while the lowest temperature is less than 0 degrees.

•Antarctic ice is in white through out but the change in ice cover from summer to winter.

•Note how the warm water off the east coast of southern Africa in summer penetrates southward, while off the west coast colder water bulges northward. This causes significant temperature differences between the east and west coasts (at the same latitude). The same is seen off South America.

•Similar east-west temperature differences are seen off North America in the northern summer.

How does temperature change vertically?

•Because of the heat input (from the sun) at the surface, the surface layers of the sea are warmest (> 20 degrees), and the temperature decreases with depth (to < 5 degrees). This is especially the case in the equatorial and temperate latitudes. In the polar regions the heat input at the surface is low, so that there is not a large change in temperature with depth.

•The minimum temperature (at the sea bottom) is between -1 and -2 degrees. Shouldn’t sea water be frozen at such temperatures?

•Typical profiles of temperature show that the decrease in temperature with depth is not linear, but that the temperature undergoes a significant “jump” at a depth of a few hundred meters. This sharp decline is known as the thermocline.

•Between the surface and the start of the thermocline the water is very isothermal. This is referred to as the mixed layer, where the surface waves continuously churn the water. The higher the wind speed, the larger the waves, the deeper the mixed layer.

•Maximum temperature at the surface can be as high as 36° C (e.g. Persian Gulf).

•Normal sea-water freezes at -1.9° C because of the presence of salinity.

•The average temperature of the sea (over all depths) is (only) 3.8°C. This means that a thin layer (a few 100m thick) of warm water (say, > 15° C) overlays a deep, cold layer several kilometres thick.

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