EXERCISE 21: Doppler Weather Radar Name Section EXERCISE 21 PROBLEMS-PART I The

Question

EXERCISE 21: Doppler Weather Radar Name Section EXERCISE 21 PROBLEMS-PART I The following questions are based on Figures 21-1, 21-2,21-3, and 21-4, radar images of Raleigh, North Carolina, on November 7, 2006. The Doppler radar site in Raleigh is in the center of the image; north is to the top of each radar image. Full-color versions of these figures may be viewed on the Hess Physical Geography Laboratory Manual, 12th edition, website at www MasteringGeography.com, then select Exercise 21, or by scanning the QR (Quick Response) code for this exercise. 1. Where is the area of greatest precipitation around Raleigh? Is the rain generally moving toward Raleigh or away? (a) 3. Is the direction of wind within the storm the same as the overall direction of movement of the storm itself? (b) How do you know? EXERCISE 21 PROBLEMS-PART II-INTERNET The following questions are based on radar images and satellite movie loops available on the Hess Physical Geography Laboratory Manual, 12th edition, website at www.MasteringGeography.com then select Exercise 21, or by scanning the QR (Quick Response) code for this exercise. View Figures 21-5 and 21-6, radar movie loops showing base reflectivity and composite reflectivity for Raleigh, North Carolina, on November 7, 2006 between 18:06 and 18:46 UTC (1806Z to 1846Z). Which radar movie loop-base reflectivity or composite reflectivity-shows precipitation over Raleigh? Why don't both radar image loops show precipitation taking place in the same location? 1. 2. View Figure 21-7, an infrared satellite movie loop recorded at about the same time as the radar images of Raleigh Does the cloud movement over Raleigh in the satellite movie loop match the direction of movement in the base velocity radar image (Figure 21-2)? What do you see in the satellite movie loop that helps explain the difference in motion shown in Figure 21-2 (base velocity) and Figure 21-3 (storm relative motion)? 3. 4.

Explanation / Answer

PART- I

1) the greatest precipitation area will be on the region which have a high cloud collectivity during the water cycle and cloud formations. in the most cases the precipitation takes place in the low pressure region and high temperature. this condense more rapidly and make the precipitations. in the same way the region with low pressure zone of Raleigh will be precipitated.

2) as the focus region of the precipitations have the low pressure region or low pressure zone formations. this make the precipitate there. but by the fact that the precipitations always moves in the directions of high to low region. this shows that the Raleigh is having the low pressure and getting precipitate from the high pressure region formed somewhere elese. thus we can say that it will move towards the Raleigh.

3)

a) no the direction will not same in all the path ways of the storm as the storm is also consist of the wind with the pressure differences. when a storm takes place the high pressure kept at the eye wall of the storm and the center of the storm have the low pressure zone. this create a potential and thus make the uneven directions of the wind but in a circular pattern.

b) the explainations is already given and explained in part a) of this question.

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PART- II

1) it will be a base reflectivity because as we know that the base reflectivity is the transmission of the power of a radar loop by stiking to the base or any local region in the same way for the above case we can say that the Raleigh region will also have the local base structure which will be taken in order of the reflection through local base in decible unit of power transmission.

2) it all due to the dependency of the directions of the roations of the loop from the specific radar. the directions of the loop rotations may be takes place in the ati clockwise as well as in the clockwise directions. due to which it vary with respect to the time and thus we cant get the precipitations image properly at a time on that region.

3) yes it have the same directions and have the match with the image virtually taken by the satellite. in fat at the present time all the satellite forecast with connected radar system technology so mapping of the pattern will be same in both the case.

4) it is the rotaions of the radar loop and the reflectivity which takes place in there. this make a contribution to the analysis of the velocity in both the above term and thus we get an idea of that estimated analysis.

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