Examine the role of the Sun in shaping space weather. Discuss the impact of Coronal Mass Ejections (CMEs) on Earth’s geomagnetic and upper atmospheric systems.
Kartavya Desk Staff
Topic: Salient features of world’s physical geography.
Topic: Salient features of world’s physical geography.
Q2. Examine the role of the Sun in shaping space weather. Discuss the impact of Coronal Mass Ejections (CMEs) on Earth’s geomagnetic and upper atmospheric systems. (15 M)
Difficulty Level: Medium
Reference: PIB
Why the Question? A novel method has been found to determine the instantaneous expansion speed and radial size of Coronal Mass Ejections (CMEs) from the Sun when it passes over a spacecraft at a single-point in the interplanetary medium. Key Demand of the Question The question requires an explanation of the Sun’s role in shaping space weather and a discussion on how CMEs affect Earth’s geomagnetic and upper atmospheric systems, with a clear distinction between the two impacts. Structure of the Answer Introduction: Define space weather and CMEs, highlighting their significance in Earth-Sun interactions. Briefly mention how CMEs cause geomagnetic and ionospheric disturbances. Body: Role of the Sun in shaping space weather: Explain how solar wind, solar flares, and CMEs contribute to space weather variations. Impact of CMEs on Earth’s geomagnetic system: Discuss geomagnetic storms, magnetosphere compression, induced currents, and auroral intensification. Impact of CMEs on Earth’s upper atmospheric system: Explain ionospheric disturbances, increased thermospheric drag, radio signal disruptions, and space debris displacement. Conclusion: Emphasize the need for space weather monitoring and global collaboration, citing initiatives like Aditya-L1 and Parker Solar Probe for improved forecasting and mitigation.
Why the Question?
A novel method has been found to determine the instantaneous expansion speed and radial size of Coronal Mass Ejections (CMEs) from the Sun when it passes over a spacecraft at a single-point in the interplanetary medium.
Key Demand of the Question
The question requires an explanation of the Sun’s role in shaping space weather and a discussion on how CMEs affect Earth’s geomagnetic and upper atmospheric systems, with a clear distinction between the two impacts.
Structure of the Answer
Introduction:
Define space weather and CMEs, highlighting their significance in Earth-Sun interactions. Briefly mention how CMEs cause geomagnetic and ionospheric disturbances.
• Role of the Sun in shaping space weather: Explain how solar wind, solar flares, and CMEs contribute to space weather variations.
• Impact of CMEs on Earth’s geomagnetic system: Discuss geomagnetic storms, magnetosphere compression, induced currents, and auroral intensification.
• Impact of CMEs on Earth’s upper atmospheric system: Explain ionospheric disturbances, increased thermospheric drag, radio signal disruptions, and space debris displacement.
Conclusion:
Emphasize the need for space weather monitoring and global collaboration, citing initiatives like Aditya-L1 and Parker Solar Probe for improved forecasting and mitigation.