The BIRA-IASB BrO Product

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Tropospheric bromine monoxide (BrO)

 

  

Reactive bromine in the atmosphere

DOAS BrO Retrievals

GOME
SCIAMACHY
Comparison
GOME vs SCIA

BrO Product Validation

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page last modified:
Thu 29 September 2016

 


GOME vs SCIAMACHY comparison for February 2003

A comparison between BrO vertical columns derived, for the month of February 2003, from GOME and available spectra of SCIAMACHY (neither all days nor a total coverage for each day are available) is presented in Figure 1. In these plots, GOME values are baseline retrievals in the 344.7-359 nm interval, while SCIAMACHY data have been processed in the UV-shifted window (336-351.5 nm), first using the Wahner BrO cross-sections, second using the Wilmouth cross-sections. Best match with GOME is clearly obtained using the Wahner cross-section. Similarly, good matching with GOME can also be obtained using the Wilmouth cross-sections when these are scaled by 0.83 (see Figure 2).

a) GOME


b) SCIAMACHY, Wahner BrO XS

c) SCIAMACHY, Wilmouth BrO XS

Figure 1: Monthly Mean of BrO columns for February 2003 retrieved with GOME (a) and available SCIA spectra,
with respectively Wahner (b) and Wilmouth (c) BrO XS


Figure 2: Monthly Mean of BrO columns for February 2003 retrieved available SCIA spectra, with Wilmouth BrO XS divided by the correction factor