Figure 11 for CASE FOR HIGHER THAN ADVERTISED MARTIAN ATMOSPHERIC PRESSURE
CORRECT GCM, OR DYING BATTERY?
Figure 11 is taken from Figures 2 and 3 of the S. M. Nelli (2009) et at paper, Reproducing Meteorological Observations at the Mars Phoenix Lander Site Using NASA Ames GCM (General Circulation Model). It shows a steady drop from 8.5 to 7.4 mbar that looks suspiciously like the graph of a dying battery. Phoenix had such batteries, which needed to be recharged by daily sunshine. As the sun faded with time, the batteries did die. We might expect that varying weather patterns would produce a more varied pressure pattern. What is seen is almost a straight line, despite the the fact that recorded highs remained about the same every day (about 240 K). The area shaded in yellow is from before the Phoenix landed. It only included GCM simulated data.