Table 1 A: uptake coefficients and associated deposition velocities (in brackets) of O3, NO2, and HCHO used in the various model scenarios. B: literature data

From: Uptake of atmospheric pollutants on road asphalt pavements: an underestimated sink in urban environments

A

Uptake (\({\nu }_{d}\) (cm s−1))

Comments

 

O3

NO2

HCHO

Base case

10−6 (0.01)

10−6 (0.01)

0 (0)

NO2 and O3 surface reactivity on urban grime only

Scenario 2

10−6 (0.01)

9.7 × 10−6 (0.09)

0 (0)

Base case + NO2 surface reactivity on asphalt

Scenario 3

6.1 × 10−5 (0.55)

10−6 (0.01)

0 (0)

Base case + O3 surface reactivity on asphalt

Scenario 4

10−6 (0.01)

10−6 (0.01)

9.0 × 10−6 (0.08)

Base case + HCHO surface reactivity on asphalt

Scenario 5

6.1 × 10−5 (0.55)

9.7 × 10−6 (0.09)

9.0 × 10−6 (0.08)

Base case + NO2, O3, and HCHO surface reactivity on asphalt

B

Uptake (\({\nu }_{d}\) (cm s−1))

Comments

O3

NO2

O3

Ervens et al.21

−(0.4)

−(0.4)

−(1)

 

Geyer and Stutz22

5.0 × 10−5 (-)

1 × 10−4 (-)

-

 

Tsai et al.52

5.0 × 10−5 (-)

2.0 × 10−5 (-)

-

 

Trick10. Wong et al.54,65. Tuite et al.53

5.0 × 10−5 (-)

1.0 × 10−5 (-)a

6.0 × 10−5 (-)b

-

anighttime

bdaytime maximum following to photoenhanced mechanisms

  1. The comments column highlights the changes as compared to the base case scenario. In panel B, the negative signs are used when the uptake coefficient or deposition velocity data are not available.
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