<p>Yes.</p>
<p>The Southern polar ice cap has a covering of <span class="math-container">$\mathrm{CO_2}$</span> about 8 m thick that doesn't completely disappear in summer. It remains in &quot;pits&quot; of up to about 1km in diameter.  The  thinner dry ice layer in the North sublimes completely into the atmosphere in summer.<a href="https://www.daviddarling.info/encyclopedia/M/Marspoles.html" rel="noreferrer"> [source]</a></p>

CC BY-SA 4.0
2020-08-02T19:57:02.107Z
Nice answer, thank you! How thick is the covering in the summer? I guess its 8m in the winter so its thinner in the summer
Joe Jobs
CC BY-SA 4.0
2021-04-20T05:37:43.543Z
Does it mean South pole don't have water ice?
Vikas
CC BY-SA 4.0
2020-08-02T08:40:51.617Z
2020-08-02T08:45:53.560Z
2020-08-02T08:45:53.560Z
James K
<p>Are there any places featuring permanent dry ice (carbon dioxide ice) on Mars?</p>
<p>Is there dry ice at the poles?</p>

CC BY-SA 4.0
2020-08-03T09:35:12.767Z
Also related: https://astronomy.stackexchange.com/q/32484/16685 That question is mostly about Martian water, but I do briefly mention CO2 ice in my answer.
PM 2Ring
<mars>
Is there permanent dry ice on Mars?
Joe Jobs
# Is there permanent dry ice on Mars?

(Asked by: username_0 on 2020-08-02)

Are there any places featuring permanent dry ice (carbon dioxide ice) on Mars?

Is there dry ice at the poles?

**Tags:** mars

> **Comments:**
> **username_1**: Also related: https://astronomy.stackexchange.com/q/32484/16685 That question is mostly about Martian water, but I do briefly mention CO2 ice in my answer.  

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## 1 answers

### Answer by username_2 on 2020-08-02. Score: 10 | Accepted answer

Yes.

The Southern polar ice cap has a covering of $\mathrm{CO\_2}$ about 8 m thick that doesn't completely disappear in summer. It remains in "pits" of up to about 1km in diameter. The thinner dry ice layer in the North sublimes completely into the atmosphere in summer. [[source]](https://www.daviddarling.info/encyclopedia/M/Marspoles.html)

> **Comments:**
> **username_0**: Nice answer, thank you! How thick is the covering in the summer? I guess its 8m in the winter so its thinner in the summer  
> **username_3**: Does it mean South pole don't have water ice?  

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