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19 votes

Why are there no CO2 snowfalls on Earth?

There is more to phase change than just what you see on that graph. At temperatures and pressures that support multiple states (e.g. solid and gas) you have to look at the saturation vapor pressure ...
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12 votes

How long does a magnetic pole reversal take to complete?

The entire process appears to take 3,000-4,000 years, according to Valet and Fournier's May 2016 review article "Deciphering records of geomagnetic reversals," which was published in AGU's Reviews of ...
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12 votes
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Does the geographic North Pole move?

Yes, it's called polar motion. The rotational pole moves continuously, as you can see from the right-hand side of this figure (below) by the Earth Orientation Centre (EOC) and the International Earth ...
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11 votes
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Unstable North Polar Vortex?

There are two key intermittent mid latitude circulation patterns during boreal winter. One is blocking flows, leading to the formation of blocking anticyclones. One can gauge the location of ...
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7 votes
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Why is the troposphere 8km higher at the equator than the poles?

To start with a definition, the tropopause is the boundary between troposphere and stratosphere; within the troposphere temperature decreases with increase in altitude (the temperature profile is ...
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6 votes

At what rate are the polar ice caps shrinking?

It's important to identify which ice. Polar bears are arctic, and they hunt in large part on sea ice. Arctic sea ice is decreasing and the most common point used for the disappearing arctic ice is ...
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6 votes

Why is McMurdo Station in Antartica more hostile than Longyearbyen (Norway), while Longyearbyen is closer to the pole?

The lack of oceanic and atmospheric currents going into and around Antarctica from equatorial latitudes means that much less heat is transported from the tropical latitudes to Antarctica compared to ...
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5 votes
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Why is McMurdo Station in Antartica more hostile than Longyearbyen (Norway), while Longyearbyen is closer to the pole?

As to the questions of the flights: McMurdo is about 3.500 km from the next airport (Dunedin in southern New Zealand), while Longyearbyen is only 950 km from Tromsø. It simply is due to the distance ...
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5 votes
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What would the geology and climate of a supposed landmass near the pole be like, assuming a thoroughly warmer planet?

For a very basic explanation of why poles are the way they are, note that the amount of solar radiation coming from the sun is spread over a larger area at the pole. Therefore you get less radiation ...
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5 votes
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Would freezing the ocean and storing the ice in the poles reduce effects of climate change or sea level?

There are a couple of different questions in there -- one is whether this would help with sea level rise, the other whether this would help with temperature increase. (The second part is easy to ...
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4 votes
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Is it possible to create ice in poles?

It depends on which pole. The south pole is in the middle of Antarctica, with mean temperatures of -57°C, liquid water doesn't exist there and the air is extremely dry. Therefore, I would say that it ...
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4 votes

Does the geographic North Pole move?

@kwinkunks already gave a good answer on the short time scale. On long time scales, mantle convection and plate tectonics redistributes large amounts of mass, and the conservation of angular momentum ...
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4 votes
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What would the equilibrium temperature be at the poles in a world without seasonality?

If we consider that by "Assume daily cycle and convection and so on operate as usual" you meant that all heat transport from/to the pole remain as it is today. Then, we can do a back of the envelope ...
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4 votes
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Does earth's size affect the temperature of the poles?

The primary factor determining the temperature of a planet is the radiation it receives from its sun. If this were the only factor, it would be possible to estimate its temperature using the black ...
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4 votes

Circum polar regions in Interglacial periods

I understand following comment as part of your question: Was that climate and terrain habitable by prehistoric humans? I also assume that by "interglacial periods" you don't mean the last and ...
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4 votes

How long does a magnetic pole reversal take to complete?

As per our numerical calculations it takes about ~1000 years to completely flip the dynamo, that being said the current models are not even close to the actual parameters in the earth's core because ...
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3 votes
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Southern Hemisphere: What is the most Northern latitude where the sun can be seen for more than 24 hours?

The situation in the southern hemisphere is identical to the northern hemisphere, but they occur at different times of the year. In the northern hemisphere the arctic circle is situated at 66.5 ...
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1 vote

The axis of rotation of the earth passes through the geographical poles or is there a true axis?

Perhaps you are thinking about the discrepancy between true north and magnetic north. The former is where the earth's axis of rotation intersects the earth's surface in the northern hemisphere. The ...
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1 vote

The axis of rotation of the earth passes through the geographical poles or is there a true axis?

Geographic axis is NOT fixed. North and south poles are NOT fixed. Ideology is reverse of what you are thinking. First suppose that Earth is rotating about some arbitrary axis => Then this axis ...
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