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Impact of Annually Variable Dust Activity on the Recession of the Martian South Polar Seasonal Cap

  • Authors: Zhibin Li, Jianjun Liu, Renhao Tian, Zhaopeng Chen, Qing Zhang, Jingjing Zhang, Wei Yan, Qiang Fu, Shaoran Liu, Nannan Ma

Zhibin Li et al 2025 The Astronomical Journal 169 .

  • Provider: AAS Journals

Caption: Figure 1.

The fifth-order polynomial-fitting results for different Martian years. (a) The fifth-order polynomial fit of the recession curve for MY30. (b) The recession rate for MY30, represented as the negative first derivative of the fifth-order polynomial. The time at which the maximum value occurs (RM point) and the time at which the rate reaches zero (RS point) are determined. (c) The acceleration for MY30, represented as the second drivative of the fifth-order polynomial. The tme of separation of the mountains of Mitchel (MS point) and the time of recession of the water ice on the Southern Mountain (SW point) are determined. (d) The jerk for MY30, represented as the negative third derivative of the fifth-order polynomial. The tme at which the maximum jerk occurs JM point) is determined. (e)–(h) The fifth-order polynomial fit of the recession curves for MY28, MY29, MY31, and MY36.

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