meresõidukiirgustes

Meresõidukiirgustes refers to the radiation exposure experienced by individuals on board ships. This exposure primarily originates from cosmic rays, which are high-energy particles originating from outer space. The Earth's atmosphere and magnetic field provide significant shielding from cosmic radiation, but this protection is reduced at sea, especially in higher latitudes where the magnetic field is weaker.

The intensity of cosmic radiation can vary depending on several factors. Altitude plays a role, and while ships are at sea level, the reduced atmospheric shielding compared to being on land at higher altitudes means a higher dose can be received. Latitude is another significant factor, with radiation levels generally increasing as one moves closer to the poles. Solar activity also influences cosmic ray flux; during periods of increased solar activity, the solar wind can sometimes deflect galactic cosmic rays, leading to a temporary decrease in their intensity. Conversely, solar energetic particle events can lead to sudden increases in radiation.

Occupations such as merchant mariners, naval personnel, and even passengers on long voyages can accumulate radiation doses from these sources. While the doses are typically not considered to be at levels that cause immediate harm, long-term cumulative exposure is a consideration in occupational health and safety for seafarers. Radiation monitoring and dose assessment are conducted to ensure that exposures remain within acceptable regulatory limits.