<p>The Northern Hemisphere is warmer than the Southern Hemisphere in part because of northward cross-equatorial ocean heat transport. <a href="http://ocp.ldeo.columbia.edu/res/div/ocp/pub/seager/Kang_Seager_subm.pdf" rel="nofollow noreferrer">http://ocp.ldeo.columbia.edu/res/div/ocp/pub/seager/Kang_Seager_subm.pdf</a></p>
<p>It is considered that the northern hemisphere has more land mass while the southern hemisphere has more ocean and therefore varies in the rate of warming.
<a href="https://atmosphere.copernicus.eu/carbon-dioxide-levels-are-rising-it-really-simple" rel="nofollow noreferrer">https://atmosphere.copernicus.eu/carbon-dioxide-levels-are-rising-it-really-simple</a></p>

CC BY-SA 4.0
2023-01-16T00:50:59.957Z
Not to be harsh, but the question wasn't about which hemisphere is warmer (but about which is showing more additional warming of recent) (even as the reasoning/paper seem interesting).  And your second paper doesn't really touch on warming at all.  So doesn't seem you really addressed the question particularly with any more info, despite some interesting stuff overall.
JeopardyTempest
CC BY-SA 4.0
2023-01-16T09:11:31.373Z
@JeopardyTempest we must have had this question before in some shape or form.
trond hansen
CC BY-SA 4.0
2023-01-17T05:00:20.487Z
The original question?  I can't find another (note that this one is 6 months old, Daria was just adding a new answer).  As far as regarding CO2 levels as Daria's second paper, it is the topic of [Why is there a seasonal cycle to the amount of CO2 in the atmosphere](https://earthscience.stackexchange.com/questions/2521/why-is-there-a-seasonal-cycle-to-the-amount-of-co2-in-the-atmosphere/3093#3093)
JeopardyTempest
CC BY-SA 4.0
2023-01-15T15:58:41.817Z
2023-01-15T15:59:26.233Z
2023-01-15T15:59:26.233Z
Daria Blackwell
<p>Hi I just found the NOAA table. It clearly shows that the N. hemisphere has warmed much more than the southern hemisphere since 1880!</p>
<p><a href="https://i.sstatic.net/xNu6V.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/xNu6V.png" alt="enter image description here" /></a>
<a href="https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202113" rel="nofollow noreferrer">https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202113</a></p>
<p>What could be the reason for this?
My idea is that the N. hemisphere has accumulated significantly more continental mass, while the S. hemisphere is almost continent-free. And the water is warming because the Gulf Stream is currently flushing more warm water northwards. Is my idea correct? Do you have other suggestions or are there suitable papers?</p>

CC BY-SA 4.0
2022-07-24T19:54:24.590Z
this may be helpful, https://www.jstage.jst.go.jp/article/sesj/26/4/26_374/_pdf#:~:text=e%20atmospheric%20carbon%20dioxide%20(CO2,understanding%20of%20the%20carbon%20cycle.
John
CC BY-SA 4.0
2022-08-13T10:15:14.320Z
@Hexenbrei, thanks for your bounty!
Weiss
CC BY-SA 4.0
2022-08-14T01:30:29.350Z
Consider that there a a lot more land in the northern hemisphere and land usage change is a contributor.
John
CC BY-SA 4.0
2022-08-14T02:19:04.277Z
One small comment, the Gulf Stream is in fact likely slowing down, so less warm water will be moving northward. https://www.severe-weather.eu/global-weather/gulf-stream-amoc-circulation-collapse-freshwater-imbalance-usa-europe-fa/
arkaia
CC BY-SA 4.0
2022-08-16T14:56:43.543Z
This Question is very interesting, my theory for the cause is that, Yes your theory applies to, with less/more landmass on either hemisphere, but I also believe land usage and the prevelance of factories and other factors can play a role in pumping more greenhouse gases into the atmosphere, many cities are located in Europe/Russia/US etc. Currents would also play a role. I'm not sure if this combination of factors would lead to a definitive answer.
Tardy
CC BY-SA 4.0
2022-08-17T07:28:37.800Z
Plenty of 'reasons' if you Google https://www.google.com/search?q=warming+northern+southern+hemisphere, but it takes further reading to get actual numbers. I don't have time to dig into all that and write an answer.
Jan Doggen
CC BY-SA 4.0
2022-08-27T15:31:59.557Z
The difference between Northern and Southern Hemispheres in air pollution levels (which tend to "mask" warming trends), and their subsequent reduction in recent decades (which respectively "unmask" the actual levels of greenhouse warming) may also play a role. See e.g. Figure 4 in https://wires.onlinelibrary.wiley.com/doi/10.1002/wcc.372
Pat
<climate-change><atmosphere>
Why is the Northern Hemisphere warming faster than the Southern Hemisphere?
Weiss
# Why is the Northern Hemisphere warming faster than the Southern Hemisphere?

(Asked by: username_0 on 2022-07-20)

Hi I just found the NOAA table. It clearly shows that the N. hemisphere has warmed much more than the southern hemisphere since 1880!

[![enter image description here](https://i.sstatic.net/xNu6V.png)](https://i.sstatic.net/xNu6V.png)
<https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202113>

What could be the reason for this?
My idea is that the N. hemisphere has accumulated significantly more continental mass, while the S. hemisphere is almost continent-free. And the water is warming because the Gulf Stream is currently flushing more warm water northwards. Is my idea correct? Do you have other suggestions or are there suitable papers?

**Tags:** climate-change, atmosphere

> **Comments:**
> **username_1**: this may be helpful, https://www.jstage.jst.go.jp/article/sesj/26/4/26_374/_pdf#:~:text=e%20atmospheric%20carbon%20dioxide%20(CO2,understanding%20of%20the%20carbon%20cycle.  
> **username_0**: @Hexenbrei, thanks for your bounty!  
> **username_1**: Consider that there a a lot more land in the northern hemisphere and land usage change is a contributor.  
> **username_2**: One small comment, the Gulf Stream is in fact likely slowing down, so less warm water will be moving northward. https://www.severe-weather.eu/global-weather/gulf-stream-amoc-circulation-collapse-freshwater-imbalance-usa-europe-fa/  
> **username_3**: This Question is very interesting, my theory for the cause is that, Yes your theory applies to, with less/more landmass on either hemisphere, but I also believe land usage and the prevelance of factories and other factors can play a role in pumping more greenhouse gases into the atmosphere, many cities are located in Europe/Russia/US etc. Currents would also play a role. I'm not sure if this combination of factors would lead to a definitive answer.  
> **username_4**: Plenty of 'reasons' if you Google https://www.google.com/search?q=warming+northern+southern+hemisphere, but it takes further reading to get actual numbers. I don't have time to dig into all that and write an answer.  
> **username_5**: The difference between Northern and Southern Hemispheres in air pollution levels (which tend to "mask" warming trends), and their subsequent reduction in recent decades (which respectively "unmask" the actual levels of greenhouse warming) may also play a role. See e.g. Figure 4 in https://wires.onlinelibrary.wiley.com/doi/10.1002/wcc.372  

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## 1 answers

### Answer by username_6 on 2023-01-15. Score: -2

The Northern Hemisphere is warmer than the Southern Hemisphere in part because of northward cross-equatorial ocean heat transport. <http://ocp.ldeo.columbia.edu/res/div/ocp/pub/seager/Kang_Seager_subm.pdf>

It is considered that the northern hemisphere has more land mass while the southern hemisphere has more ocean and therefore varies in the rate of warming.
<https://atmosphere.copernicus.eu/carbon-dioxide-levels-are-rising-it-really-simple>

> **Comments:**
> **username_7**: Not to be harsh, but the question wasn't about which hemisphere is warmer (but about which is showing more additional warming of recent) (even as the reasoning/paper seem interesting).  And your second paper doesn't really touch on warming at all.  So doesn't seem you really addressed the question particularly with any more info, despite some interesting stuff overall.  
> **username_8**: @username_7 we must have had this question before in some shape or form.  
> **username_7**: The original question?  I can't find another (note that this one is 6 months old, username_6 was just adding a new answer).  As far as regarding CO2 levels as username_6's second paper, it is the topic of [Why is there a seasonal cycle to the amount of CO2 in the atmosphere](https://earthscience.stackexchange.com/questions/2521/why-is-there-a-seasonal-cycle-to-the-amount-of-co2-in-the-atmosphere/3093#3093)  

---

