7

...measured in mol/m² within the total or tropospheric column. Is it possible to deduce concentrations for a specific slice of the troposphere? Not really, since you have a crucial bit of information missing: the vertical distribution. Your alternatives are: Combine satellite data with a model to estimate near-surface NO₂. The model may be able to ...


5

This is a topic of almost continual discussion in the South China Morning Post, scmp.com , an English language newspaper in Hong Kong. This is both because air quality is a major problem in China (but one to which they are paying a good deal of attention) and because massive economic interruptions are relatively frequent. The Olympics were a big one, ...


4

What is happening here? Photoshop! The number of visible satellites plummets towards the middle of the night when more satellites fall into the shadow of the Earth, represented by the dark area on the left of the image. (emphasis added)


3

The total area burned was 12.6 million hectares, or 126,000 square kilometers. This is equivalent to: The US state of North Carolina (125,920 sq km) The US state of New York (122,057 sq km) The US state of Mississippi (121,531 sq km) North Korea (120, 408 sq km) 96% of Greece (130,647 sq km) 52% of the United Kingdom (241,930) 36% of Germany (348,672 sq km) ...


1

According to the WMO, your answer is as follows. (Note that you can use the width of your little finger held at arms length to estimate one degree and the width of three fingers held together at arms length to estimate five degrees.) Altocumulus is distinguished from Stratocumulus by: Most of the regularly arranged elements having, when observed at an ...


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