Medical Definition of melena. : the passage of dark tarry stools containing decomposing blood that is usually an indication of bleeding in the upper part of the digestive tract and especially the esophagus, stomach, and duodenumâcompare hematochezia.
A forecast analyst's job is to research how to capitalize on existing trends as well as identify new and developing trends and sales opportunities in the market. A bachelor's degree is necessary for most forecast analysis positions, and a master's degree is often preferred for higher-level roles. Source: *U.S.
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location. Human beings have attempted to predict the weather for as long as there are records. Today, weather forecasts are made by collecting quantitative data about the current state of the atmosphere and using scientific understanding of atmospheric processes to project how the atmosphere will evolve.