BÀI GIẢNG KHÍ TƯỢNG LÝ THUYẾT CHƯƠNG 9

Ngày tải lên: 08/05/2016, 11:43

Ngày tải lên: 08/05/2016, 11:43

... further reference is made to the appropriate chapter of a specialist text-book dealing with radar 58 Chapter Eight QUESTIONS: Differentiate between fog, mist and haze What are the necessary conditions

Ngày tải lên: 08/05/2016, 11:43

... local name for these periods is Crachin (See Figure 9. 10) Examples of other monsoons When reading the following refer to Figures 9. 8 and 9. 9 which show world pressure distribution for January ... Ocean with the North 65 Chapter Nine Atlantic and North Pacific Bear in mind that Figures 9. 8 and 9. 9 show mean pressures for their respective months and that the pressure distribution loca...

Ngày tải lên: 08/05/2016, 11:43

... miles, thus hazy conditions are not uncommon in a tropical continental air mass (See Figures 11. 3 and 11. 4) Warm polar maritime (wPm) air or returning polar maritime (rPm) air A polar maritime ... occasions it is called returning polar maritime air or warm polar maritime air (See Figures 11. 3 and 11. 4) * Air masses which originate over the snow covered areas of the Arctic have similar...

Ngày tải lên: 08/05/2016, 11:44

... alternately (See Figures 12. 5 and 12. 6) It is generally associated with light variable winds, often thundery in summer and dull or foggy or misty in winter In Figure 12. 5 the wind circulation ... PRESSURE A wedge shaped extension of an anticyclone between two areas of low pressure (See Figures 12. 4 and 12. 6) The isobars assume their greatest curvature along the axis of the ridge It...

Ngày tải lên: 08/05/2016, 11:44

... and, in the latter case, will undercut the warmer air (See Figures 13. 8 (a) and (b), 13. 9 (a) and (b)) In Figures 13. 8(a) and 13. 9(a) the position of the upper front is indicated by a dotted line ... process has been completed and all the tropical air has been lifted off the ground Figures 13. 6 and 13. 7 show the stages in the occluding process Note that the symbol for an occlusion...

Ngày tải lên: 08/05/2016, 11:44

Ngày tải lên: 08/05/2016, 11:44

... quantity and weight of air in the area and barometric pressure increases at surface level (See Figure 15. 1) The layer of cold air produced is very shallow and lies in the lowest to kilometres Above

Ngày tải lên: 08/05/2016, 11:44

... cause a corresponding north and south movement of the average latitude of the vertex Figures 16. 2 ,16. 3 and 16. 4 show some typical tracks of tropical revolving storms Note that recurvature sometimes ... broad pattern of movement is by no means regular: it is sometimes very erratic (See Figures 16. 1 to 16. 4.) The tracks vary considerably and depend on the general pressure distribution...

Ngày tải lên: 08/05/2016, 11:44

... than 20° it is unlikely to be making any movement towards the east A diagram similar to Figure 17. 2 (but omitting the ship) on a piece of tracing paper will be found useful here in deciding what ... AVOID THE WORST OF THE STORM: NORTHERN HEMISPHERE RIGHT-HAND OR "DANGEROUS" SEMICIRCLE (Figure 17. 2 Ship A) If under power proceed with maximum practical speed with wind ahead or on starboard...

Ngày tải lên: 08/05/2016, 11:44

... of the four main synoptic maps each day are made on a rigid time schedule: 0000, 0600, 1200 and 180 0 GMT Many hundreds of observations are thus received regularly by the relevant meteorological ... SHIPPING Because international meteorology was born out of the Maritime Conference at Brussels in 185 3 and since then most of the oceans' weather observations have come from merchant ships it i...

Ngày tải lên: 08/05/2016, 11:44

... areas the westerly winds average about 100 knots in winter Figure 19. 4 shows the contours of a 500 mb pressure surface on September 198 4 It covers only a very small area on the original chart, from ... distribution on the upper wind, i.e the vector difference between the upper and lower winds (see Figure 19. 2) The thermal wind increases with increasing height; it flows parallel to the i...

Ngày tải lên: 08/05/2016, 11:44

... Chapter Twenty west and the resultant deflection in the whole body of water is to the west See fig 20. 2 It may appear that only the surface water effect is important for the navigator, however, it

Ngày tải lên: 08/05/2016, 11:44

... with the term icebergs used for larger pieces of ice DISTRIBUTION OF SEA ICE AND ITS SEASONS Fig 21. 1 shows mean and extreme limits of sea ice in navigable waters of the northern and southern hemisphere

Ngày tải lên: 08/05/2016, 11:45