Cloud Climatology The DATA International Satellite Cloud3. The map indicates how

Question

Cloud Climatology The DATA International Satellite Cloud3. The map indicates how much moisture is available for Climatology Climatology Project (ISCCP) collects cloud data from weather satellites of several nations to help us understand the role of clouds in climate. precipitation in the lower half of the troposphere. How much precipitable water is available in the far north? 4. Notice that precipitable water amounts are high in equatorial regions and decrease poleward, as do temperatures. Why are precipitable water and tem- perature related in this way? Activities Go to bttp:lliscep.giss.nasa.gov/products/browsed2.html, the SCCP website. Retain the variable "Total Cloud Amount (%)" and time period "Mean Annual"; then click "View" Go back and select the variable "Mean Precipitable Water for 680-310mb"; then click "View." 5. The map indicates how much moisture is available for precipitation in the upper half of the troposphere Again, precipitable water is most abundant in equato- rial regions. What type of cloud is likely to form there? 1. The map indicates the average annual percentage of cloud-covered sky. What is the range of cloud cover amounts in the far north? In the far south? 2. In general, is cloud cover higher over oceans or land? 6. Recall the patterns of cloud cover (Activity 1) and precipitable water (Activity 3) in the far north. What types of clouds are most likely to form in the far north? It may help to refer to Figure 6-14 What would cause this? Go back and select the variable "Mean Precipitable Water for 1000-680 mb then click "View. 00912 Mean Annual

Explanation / Answer

1. The range of cloud cover in the far north is 50-75% and the range of cloud cover in the far south is around 30-50%.

2. In general, the cloud cover over oceans is higher. This is based on the fact that clouds need moisture to develop and grow, the moisture over the oceans is very high compared to the moisture over land surfaces.

3. The amount of precipitation in the far north ranges from 0.4-0.4 units

4. We know that heat is required for water to evaporate and form clouds which inturn form precipitation. In the equator, the amount of solat insolation and heat is maximum whereas in poles, the insolation is very low and also ice has a high albedo which reflects 90% of the sunlight, which causes that region to be cooler.

5. We can see that there is precipitable water in the upper troposphere, there is only one type of cloud which has precipitable water at high altitudes, it is cumilonimbus cloud.

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