L'inquinamento urbano da polveri sottili indotto da un evento estremo: il Capodanno 2015 a Napoli

1. L’inquinamento urbano da polveri sottili
indotto da un evento estremo:
il Capodanno 2015 a Napoli
Nicola Scafetta
Adriano Mazzarella

2. Osservatorio Meteorologico della Federico II
Supersito di San Marcellino

3. Time behavior of PM10 and PM2.5
air concentration

4. Temperatura potenziale in
Sant' Elmo and San Marcellino
2854.0
0







P
P
T
ME  
Sant' Elmo: Tmin = 2.9 oC, P = 986 hPa, E= 5.6 oC
San Marcellino: Tmin = 4.6 oC, P = 1016 hPa, M= 5.1 oC
Po = 1022 hPa
= 0.5 oC: Predicted air pollution severity = low
1.8 km
50 m asl
250 m asl

5. PM10 and PM2.5 concentration vs.
wind speed

6. PM10 and PM2.5 concentration vs.
Hi wind speed

7. 10 km
Average wind stress: 5 m/s = 18 km/h
direction 61o (NE)

8. Time behavior of
PM10-2.5 and PM2.5 percent
PM2.5 = 83%
PM10-2.5 = 17%
PM2.5 = 71%
PM10-2.5 = 29%
PM2.5 = 89%
PM10-2.5 = 11%

9. PM10-2.5 and PM2.5 percent
vs. Wind Stress

10. PM10 and PM2.5 ratio vs.
Hi wind speed

11. Conclusion
• Meteorological conditions predicted low pollution.
• PM10 and PM2.5 midnight peak was at 250-300
g/m3 from less than 20 g/m3
• (before) 83% of PM10 was PM2.5
• (during) 89% of PM10 was PM2.5
• (after) 71% of PM10 was PM2.5
• Negative correlation with the wind stress (5 m/s)
• The 20 km wide metropolitan area was smog-
cleaned by the NE wind in 30 minutes
• PM2.5 is cleaned faster than PM10

12. Wash the city after
'Capodanno'!
AND ....
EVERY WEEK.
The Solution?