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Earth, Planets and Space
Figure 2 | Earth, Planets and Space

Figure 2

From: Noctilucent clouds observed from the ground: sensitivity to mesospheric parameters and long-term time series

Figure 2

Trend in the Moscow seasonal integral NLC brightness. (a) The NLC brightness according to the Moscow data for 1990 to 2013 without a weather correction factor; (b) the same but with weather corrections. The script in the upper left corner shows the 2-D linear regression model versus time and solar Ly α flux. The contribution of both arguments is given by the blue line, the contribution of the time trend is shown by the black thick line, and the thin red curves denote 95% confidence limits.

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