Final answer:
The indicator not consistent with projected climate change is decreasing atmospheric water vapor content. Other options reflect established trends such as increasing temperatures, ocean heat content and the melting of glaciers and sea ice.
Step-by-step explanation:
The parameter among the options that is not occurring as an indicator of projected climate change is c. decreasing atmospheric water vapor content.
All of the other options listed are consistent with current scientific understanding of climate change trends. For instance, increasing global air temperatures and increasing ocean heat content are well-documented phenomena. The decline in sea ice cover and glacier/ice sheet volumes is also supported by extensive research and contributes to sea level rise. In contrast, as global temperatures rise, the capacity of the atmosphere to hold water vapor increases, thus atmospheric water vapor content is expected to increase, not decrease, which can lead to more intense precipitation events.