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. Author manuscript; available in PMC: 2021 Nov 12.
Published in final edited form as: J Geophys Res Atmos. 2021 Oct 9;126(20):e2021JD034916. doi: 10.1029/2021jd034916

Figure 4.

Figure 4.

Spatial maps of black carbon column density anomaly (kg m−2) for each respective sub-domain for (a) March–May (MAM), (b) June–August (JJA), (c) September–November (SON), and (d) December–February (DJF), computed as the difference between the mean MERRA-2 BC value on BB days and the mean value of all days in each respective set of months. Hashed areas denote grids where the anomaly value is statistically significant with 95% confidence based on the Student’s t-test. The black box denotes the sub-domain that the analysis was conducted for in each composite map.