Fig. 1. Relationship among diffusion mode index, observation height, and entanglement degree of quantum channels

Fig. 2. Relationship among sand-dust disaster coefficient, observation height, and entanglement of quantum channels

Fig. 3. Relationship among of sand-dust particle radius, observation height, and entanglement of quantum channels

Fig. 4. Flow chart of switching algorithm

Fig. 5. Entanglement distribution process between Alice and Bob before switching

Fig. 6. Entanglement distribution process in communication between Alice and Bob after switching request

Fig. 7. Relationship between entanglement degree and comprehensive influence factor

Fig. 8. Simulation of entanglement degree change in switching process