Atmospheric sciences and radiant energy. In contrast to meteorology, which studies short term weather systems lasting up to a few weeks, climatology studies the frequency and trends of those systems. It studies the periodicity of weather events over years to millennia, as well as changes in long-term average weather patterns, in relation to atmospheric conditions. Climatologists, those who practice climatology, study both the nature of climates – local, regional or global – and the natural or human-induced factors that cause climates to change. Climatology considers the past and can help predict future climate change. Phenomena of climatological interest include the atmospheric boundary
Short-term mission Short-term mission A short-term mission (STM) is the mobilization of a Christian missionary for a short period of time ranging from days to a year; many short-term missions are called mission trips. The short-term missionary is a fairly recent innovation in the global missions movement, but many short-term missions agencies are seeing an increased number of trips that consist of a week up to a year. Generally, missionaries have been people sent to spread their religious faith, usually among the people of another country or region in which that faith is not widely practiced. In the past 50 years, churches