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Questions tagged [air-pollution]

Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, allergies, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment.

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Convert NO2 concentration in Sentinel-5P data from mol/m2 to μg/m3 on the ground level

Sentinel-5P satellite provides high-resolution data products on concentration levels for several atmospheric trace gases (NO2, SO2, O3 , and others), which are measured in mol/m2 within the total or ...
Yaroslav's user avatar
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5 votes
1 answer
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Convert OMI NO2 Vertical Column Density (molecules/cm^2) into Mixing Ratio (ppm)

I want to convert OMI AURA data on NO2 column amounts in molecules/cm2 into ppm for comparison purposes with other literature. Can it be done? Is there a standard way of doing it? I looked into the ...
Francisco's user avatar
4 votes
1 answer
906 views

Which particles are classified as PM2.5? How exactly is this defined?

Question When discussing "PM2.5", is there any standardized understanding of which particles are or are not included? Is it everything that's 2.5 microns and smaller? Or Everything between 2....
uhoh's user avatar
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7 votes
3 answers
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Why are inversion layers so important in meteorology?

I keep hearing the term "inversion layer" when reading about pollution and meteorology. I know it vaguely amounts to "some place where the gradient of temperature is inverted". But why are inversion ...
Jiby's user avatar
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17 votes
1 answer
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Where do bad smells eventually go?

Suppose that I haven't taken a shower for a while, or haven't disposed of my trash, or something, and the room I've been in now stinks. Then, to remove the smell from the room (presumably after first ...
Ove's user avatar
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10 votes
1 answer
315 views

What principles do we consider when selecting an air pollution monitor location?

I'm working on a project aiming at finding some potential point as a new air pollutant monitor site for a city to measure $SO_2$, $NO_2$, $PM_{2.5}$, etc. After modeling the surface concentration of ...
Han Zhengzu's user avatar
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9 votes
0 answers
152 views

What meteorological factors contribute to springtime Trans-Pacific air-pollution events?

The transport of tropospheric ozone, ozone precursors, carbon monoxide, etc from Asia to North America is an active area of research (see J.L. Ambrose, et al., 2011) These types of events occur ...
f.thorpe's user avatar
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6 votes
3 answers
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What is a temperature inversion and can it trap smog/pollution?

Just as the title says, I heard about this term but am not sure how it works.
reddit's user avatar
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5 votes
2 answers
730 views

How to map emission inventory from lat&lon corrdinate to WRF model grid

Here, I have a regional emission inventory, which mainly contains the varibales of lat,lon,...
Allen Zhang's user avatar
4 votes
3 answers
149 views

Are atmospheric halogen oxides "supposed to be" in the atmosphere? Where do they come from?

I like to naively think of Earth's natural atmosphere as nitrogen, oxygen, argon, water, carbon dioxide and okay, some nitrogen and sulfur oxides, and again okay, a little hydrogen and methane from ...
uhoh's user avatar
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4 votes
1 answer
110 views

The higher value range for the same satellite product (NO2_OMI_TEMIS)

I'm dealing with NO2 column density of troposphere, and my data source is TEMIS. The NO2 level3 data can be derived from the original information of OMI instrument. I have downloaded two types of ...
Han Zhengzu's user avatar
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3 votes
1 answer
145 views

Where can I find worldwide standards of manganese mining?

Hi everybody who sees this post, I need urgent help for finding all official world wide standards of the manganese mining. Problem is that, many houses has been damaged in my village with manganese ...
cyberail's user avatar
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