Mars leaks faster when closer to the sun 

 NASA's MAVEN mission and the Hubble Space Telescope have teamed up to reveal new insights into how Mars' water is leaking into space. 

https://cdn.mos.cms.futurecdn.net/TbPsrybDo9jnjqM8K4vS84.jpg

https://www.space.com/mars-water-leaking-sun