| 41. | It is traditionally expressed either in metres or as a pressure difference in hectopascal ( hPa, equivalent to millibar ).
|
| 42. | :The limit for human life ( with considerable difficulty ) is a partial pressure of about 65 millibars of O2.
|
| 43. | Surface pressures varied diurnally over a 0.2 millibar range, but showed 2 daily minima and two daily maxima.
|
| 44. | This effect is strongest in tropical zones, with an amplitude of a few millibars, and almost zero in polar areas.
|
| 45. | What contributed to the event, was the strong high pressure system ( about 1040 millibars the morning of the 16th ).
|
| 46. | The average January sea level pressure at its centre is about 1, 020 millibars ( 30.12 inches of mercury ).
|
| 47. | The lowest pressure of this storm was 918 millibars, lower than that of some Category 5's, such as Guillermo.
|
| 48. | The hurricane reached a peak intensity of 90 mph ( 140 km / h ) and its barometric pressure dropped to 979 millibars.
|
| 49. | As central pressures go, this was not particularly a powerful system; it was only 996 millibars the morning of the 17th.
|
| 50. | The bar and the millibar were introduced by the Norwegian meteorologist Bjerknes, who was a founder of the modern practice of weather forecasting.
|
