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MLS maps of ClO, O3 and HNO3 in 1995-96 NH winter

These figures adapted from Manney et al. [Geophys. Res. Lett. 23, 3203-3206, 1996] and Santee et al. [Geophys. Res. Lett. 23, 3207-3210, 1996]
maps at 465K of ClO, O3, HNO3, and column O3 about 100hPa on December 21, 1995 maps at 465K of ClO, O3, HNO3, and column O3 about 100hPa on January 30, 1996 maps at 465K of ClO, O3, HNO3, and column O3 about 100hPa on February 20, 1996 maps at 465K of ClO, O3, HNO3, and column O3 about 100hPa on March 1, 1996

These images show lower stratospheric ClO, O3 and HNO3 (on the 465K potential temperature surface, around 20 km height), and O3 column above 100 hPa observed by MLS on selected days during the 1995-96 northern hemisphere winter. The black contours are temperatures of 195 and, when they occur 188K, the nominal thresholds for formation of type 1 and type 2 polar stratospheric clouds. The white contours indicate the approximate edge of the polar vortex (potential vorticity contours of 2.5 and 3.0 x 10-5 K m2 kg-1 s-1.

See Manney et al. [Geophys. Res. Lett. 23, 3203-3206, 1996] and Santee et al. [Geophys. Res. Lett. 23, 3207-3210, 1996] for discussion and analyses of these data.

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