<blockquote>
  <p>Are there papers or datasets of average CO<sub>2</sub> concentrations down at
  ground level (say 0-20 metres upwards from the ground), in the spaces
  between buildings - streets, parks and so on?</p>
</blockquote>

<p>Yes, <a href="http://www.tandfonline.com/doi/abs/10.1080/02723646.1998.10642642#preview" rel="nofollow">THE URBAN CO2 DOME OF PHOENIX, ARIZONA</a> has measurements at a height of 2 meters above ground level, 1.6 km horizontal resolution. CO<sub>2</sub> concentrations are 555 ppm near the center of the city.</p>

<p><a href="http://www.sciencedirect.com/science/article/pii/S135223100000412X" rel="nofollow">An intensive two-week study of an urban CO<sub>2</sub> dome in Phoenix, Arizona, USA</a> has higher resolution data along selected transects.</p>

CC BY-SA 3.0
2014-10-28T13:15:44.317Z
2014-12-13T08:22:29.243Z
2014-12-13T08:22:29.243Z
DavePhD
<p>I gather that higher-than-ambient CO<sub>2</sub> "domes" can form <em>above</em> urban areas, <a href="http://dx.doi.org/10.1021/es903018m">enhancing other local air pollution</a>. Are there papers or datasets of average CO<sub>2</sub> concentrations down at <em>ground</em> level (say 0-20 metres upwards from the ground), in the spaces between buildings - streets, parks and so on?</p>

<p>From what I've read, CO<sub>2</sub> concentrations at higher levels are more temporally stable, but understate concentrations across the city; whereas monitoring stations down at street level give representative concentrations for that specific place, but are temporally highly variable, and comparisons between sites suggest that they are spatially highly variable too.</p>

CC BY-SA 3.0
2014-09-08T01:09:08.450Z
I'd like to see a reference for that first sentence. Seems quite surprising to me that the effect could be strong enough to make a measurable difference to temperature (let alone separable from the urban heat island effect).
naught101
CC BY-SA 3.0
2014-09-08T05:30:19.433Z
@naught101 thanks for the comment, which motivated me to re-find the paper where I thought I'd got that titbit from. On re-reading, I think I'd mis-remembered it first time, and have edited my question accordingly. I apologise for my mistake. Thanks for spotting it.
410 gone
CC BY-SA 3.0
2014-09-08T05:50:20.767Z
No need to apologise :) Interesting question. I imagine you'd find very different answers for different urban types (high rises, high density low-rises, suburban areas). And you'd also see a massive daily cycle, as the fumes from transport dissipate overnight. But I wonder about that paper - it says that *"CO2 emissions in isolation may increase local ozone and particulate matter"*, but what would be the mechanism? Sounds like a classic case of covariance mis-attributed as causality.  I also really hate their use of "enhance" - such meaningless business speak.
naught101
CC BY-SA 3.0
2014-09-08T08:16:15.063Z
@naught101 I'm curious about the causal mechanism too. Dammit, I'm probably going to have to read the paper properly now.
410 gone
CC BY-SA 3.0
2014-09-14T01:55:42.003Z
Perhaps see work by Pataki et al, eg [this one](http://onlinelibrary.wiley.com/doi/10.1029/2003JD003865/full). @naught101 (re the look in the o.p.) presumably the causal mechanisms are encoded in the simulation model that is referred to in the abstract
David LeBauer
CC BY-SA 3.0
2014-09-14T04:21:48.603Z
sed s/look/link/
David LeBauer
<atmosphere><co2><pollution><urban-climate><land-surface>
Are there any high-resolution urban CO2 concentration data sets?
410 gone
# Are there any high-resolution urban CO2 concentration data sets?

(Asked by: username_0 on 2014-09-07)

I gather that higher-than-ambient CO2 "domes" can form *above* urban areas, [enhancing other local air pollution](http://dx.doi.org/10.1021/es903018m). Are there papers or datasets of average CO2 concentrations down at *ground* level (say 0-20 metres upwards from the ground), in the spaces between buildings - streets, parks and so on?

From what I've read, CO2 concentrations at higher levels are more temporally stable, but understate concentrations across the city; whereas monitoring stations down at street level give representative concentrations for that specific place, but are temporally highly variable, and comparisons between sites suggest that they are spatially highly variable too.

**Tags:** atmosphere, co2, pollution, urban-climate, land-surface

> **Comments:**
> **username_1**: I'd like to see a reference for that first sentence. Seems quite surprising to me that the effect could be strong enough to make a measurable difference to temperature (let alone separable from the urban heat island effect).  
> **username_0**: @username_1 thanks for the comment, which motivated me to re-find the paper where I thought I'd got that titbit from. On re-reading, I think I'd mis-remembered it first time, and have edited my question accordingly. I apologise for my mistake. Thanks for spotting it.  
> **username_1**: No need to apologise :) Interesting question. I imagine you'd find very different answers for different urban types (high rises, high density low-rises, suburban areas). And you'd also see a massive daily cycle, as the fumes from transport dissipate overnight. But I wonder about that paper - it says that *"CO2 emissions in isolation may increase local ozone and particulate matter"*, but what would be the mechanism? Sounds like a classic case of covariance mis-attributed as causality.  I also really hate their use of "enhance" - such meaningless business speak.  
> **username_0**: @username_1 I'm curious about the causal mechanism too. Dammit, I'm probably going to have to read the paper properly now.  
> **username_2**: Perhaps see work by Pataki et al, eg [this one](http://onlinelibrary.wiley.com/doi/10.1029/2003JD003865/full). @username_1 (re the look in the o.p.) presumably the causal mechanisms are encoded in the simulation model that is referred to in the abstract  
> **username_2**: sed s/look/link/  

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## 1 answers

### Answer by username_3 on 2014-10-28. Score: 5

> Are there papers or datasets of average CO2 concentrations down at
> ground level (say 0-20 metres upwards from the ground), in the spaces
> between buildings - streets, parks and so on?

Yes, [THE URBAN CO2 DOME OF PHOENIX, ARIZONA](http://www.tandfonline.com/doi/abs/10.1080/02723646.1998.10642642#preview) has measurements at a height of 2 meters above ground level, 1.6 km horizontal resolution. CO2 concentrations are 555 ppm near the center of the city.

[An intensive two-week study of an urban CO2 dome in Phoenix, Arizona, USA](http://www.sciencedirect.com/science/article/pii/S135223100000412X) has higher resolution data along selected transects.


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