Satellite Observed Aerosol Optical Thickness and Trend around Megacities in the Coastal Zone

Table 1

AOT linear trend (LT) and its significance (LT/σ) and temporal averaged (1981–2009) monthly mean AOT values for the seventeen MCCZ along with their geolocation and projected population in 2025.

Number	Megacity	AOT LT (1/decade)	Significance of LT	Averaged AOT	Geolocation (longitude, latitude)	Population in 2025 (million)
1	Tokyo	−0.092	−1.78	0.21	139.77°, 35.68°	37
2	Mumbai	0.489	4.85	0.44	72.82°, 18.90°	26
3	Sao Paulo	−0.231	−3.14	0.20	−46.63°, −23.55°	22
4	New York	−0.439	−7.66	0.17	−73.94°, 40.78°	21
5	Shanghai	0.333	1.98	0.78	121.43°, 31.20°	20
6	Kolkata	0.595	1.80	0.58	88.33°, 22.53°	20
7	Karachi	0.258	3.42	0.31	66.98°, 24.80°	19
8	Lagos	0.258	2.26	0.40	3.40°, 6.45°	16
9	Manila	−0.084	−1.61	0.13	120.98°, 14.58°	15
10	Buenos Aires	0.436	2.01	0.77	−58.37°, −34.58°	14
11	Los Angeles	−0.229	−5.99	0.12	−118.25°, 34.05°	14
12	Rio de Janeiro	−0.302	−4.92	0.18	−43.23°, −22.90°	13
13	Istanbul	−0.761	−12.85	0.20	28.83°, 40.97°	12
14	Osaka Kobe	0.005	0.10	0.21	135.50°, 34.53°	11
15	Shenzhen	0.173	1.45	0.42	114.13°, 22.53°	11
16	Jakarta	0.450	6.21	0.26	106.83°, −6.10°	11
17	Lima	0.059	1.08	0.25	−77.03°, −12.05°	11