Regions	Decadal change in JJASO AOD			Change from P1 to P2 (%)
Regions	CALIOP	MAIAC	MODIS C6.1	CALIOP	MAIAC	MODIS C6.1
West-Arctic Ocean	0.004	0.009	0.017	5.8	6.9	11.3
East-Arctic Ocean	0.003	0.000	0.025	5.1	0.1	14.0
East-Siberian Sea	0.004	0.016	0.063	11.0	13.5	28.5
Chukchi Sea	0.002	0.003	0.003	4.2	2.2	1.6
Beaufort Sea	<0.0001	0.005	0.034	−0.6	5.4	16.0
Bering Sea	0.018	0.010	0.025	22.0	7.9	15.1
Canadian Archipelago	0.007	0.024	0.056	14.8	20.2	33.7
Baffin & Hudson Bays, Labrador Sea	0.005	0.020	0.023	7.9	15.3	17.7
Greenland Sea	0.001	0.000	0.010	2.7	<0.01	8.1
Norwegian Sea	0.005	0.005	0.013	10.1	5.1	10.0
Atlantic, North and Baltic Seas	−0.005	−0.002	0.001	−5.7	−1.2	0.6
Barents Sea	0.003	−0.003	0.006	7.1	−2.5	4.4
Kara Sea	0.001	0.005	0.025	2.1	5.6	14.0
Laptev Sea	0.001	0.013	0.067	2.8	10.3	30.3
Entire Arctic	0.007	−0.005	0.023	13.2	−4.1	11.7