1.(20%) (1) Unsaturated air, relative humidity 70%, if the water pressure is 20hPa, then the saturated water pressure is ____hPa. (2) (Multiple choice) Please refer to the diagram of the relationship between the temperature and the saturated vapor pressure of water vapor in the Week12 water vapor condensation and precipitation handout. Excuse me 1 The corresponding temperature of the answer to (1) on the saturated vapor pressure line is between (a) 30-35 (b) 25-30 (c) 20-25 (d) 15-20 degrees C 2. (10%) If the mixing ratio of an air block is 10g/Kg at 1000hPa, if the water vapor in it is just saturated, the temperature of the air block is ___ degrees C (please refer to the adiabatic diagram on the next page ) 3. (60%) Please refer to the adiabat diagram on the next page, the solid line is the dry adiabat line (Dry Adiabat), the other dotted line is the wet adiabat line (Moist Adiabat), the gray line is the saturated mixing ratio (Mixing ratio g/kg , see upper value, 0.08 to 100) (1) If the air block is initially at point A (30oC, 1000hPa), and the mixing ratio is 6g/Kg, then its dew point Td = ____ oC (take an integer) (2) Please mark on the diagram the point where the water vapor starts to condense when the air block rises, and please mark it with a red pen as "B" on the diagram. (3) Continuing from (2), when the air block continues to rise, the water vapor begins to condense, assuming that the condensation is 3g/Kg, forming rain, and the water vapor mixing ratio is 3g/kg. Please use the position of the air on this picture at this time as Blue pen marked "C" (4) Carrying on from (3), the air mass sinks. When it reaches the ground at 1000hpa, the temperature is about ____ oC, and the dew point is _____ oC (integer) (5) Subsequent to (3), if the condensed 3g/Kg does not become rain and remains in the air block, when it sinks back to 1000hPa, its temperature is ___ oC (integer) 4. (10%) From the dew point Td value obtained in the above question 3-(1), the dry adiabatic cooling rate is 10oC/km, and the dew point cooling rate is 1.8oC/km, then the cloud base height is ____km.