Given the following data, calculate the change in virtual potential temperatures and the bulk Richardson number and decide whether the atmosphere is statically and dynamically stable. z (km) 5.0 4.5 Tv

(°C) -20 --16 U (ms¹) 40 40 Select the 2 correct answers. Select one or more: V (ms¹) 8 13 a. The 5km layer has a higher potential temperature than the 4.5 km layer and thus the air in the 4.5 km to 5 km region is statically stable. b. The 5 km layer has a higher potential temperature than the 4.5 km layer and thus the air in the 4,5 km to 5 km region is statically unstable. O c. The 5 km layer has a lower potential/nd. Ri is 0.69 and is above the critical value of 0.25 and the flow is turbulent due to dynamic instability O e. and thus the air in the 4.5 km to 5 km region is statically stable. O f. Ri is 0.69 and is above the critical value of 0.25 and therefore the air is dynamically stable The 5 km layer has a lower potential temperature than the 4.5 km layer and thus the air is the 4.5 km to 5 km region is statically unstable. Og Ri is 0.19 and is below the critical value of 0.25 and therefore the flow is turbulent due to dynamic instability Oh. Ri is 0.19 and is below the critical value of 0.25 and therefore the air is dynamically stable