Some factors that might influence solar radiation on the Martian surface
The distance from the sun would be one factor. If there were an atmopshere to absorb or scatter radiation, that would be another.
Of course, the radiative output of the sun also matters.
Except during dust storms, most radiation to Mars reaches the surface.
Magnetic field or rather the lack of it.
see
http://mgs-mager.gsfc.nasa.gov/Kids/magfield.html
Solar radiation on the Martian surface is influenced by several factors. Here are some of the key factors:
1. Mars' Distance from the Sun: The amount of solar radiation received on Mars depends on its average distance from the Sun, which is about 230 million kilometers. Mars has a more elliptical orbit compared to Earth, so its distance from the Sun varies significantly throughout its year.
2. Mars' Axial Tilt: Similar to Earth, Mars also has an axial tilt, which affects the distribution of solar radiation on its surface. The tilt causes variations in the angle at which sunlight reaches different regions of Mars throughout its year.
3. Atmospheric Conditions: Mars has a thin atmosphere compared to Earth. Although it does have dust particles and a small amount of carbon dioxide, the atmosphere is not dense enough to significantly affect the sunlight reaching the surface. However, dust storms on Mars can temporarily reduce solar radiation.
4. Albedo of Martian Surface: The reflectivity, or albedo, of the Martian surface also influences the amount of solar radiation absorbed. Light-colored or reflective surfaces, such as ice caps and clouds, tend to reflect more sunlight back into space, resulting in lower solar radiation reaching the surface.
5. Martian Topography: The elevation and topography of different regions on Mars play a role in determining the amount of solar radiation received. Higher elevations may receive more intense radiation due to their closer proximity to the direct sunlight.
To get more precise and up-to-date information on solar radiation on the Martian surface, you can refer to data collected by scientific instruments on Martian rovers and satellites, such as the Mars Science Laboratory (Curiosity rover), Mars Exploration Rovers (Spirit and Opportunity), or the Mars Reconnaissance Orbiter. These instruments measure solar radiation levels and provide valuable insights into the Martian environment.