NATURAL DISASTERS CHAPTER 8 (Weather) 1) Zonal circulation 2) Moisture and humidity 3) Rising air, lapse rates and stability 4) Air Masses and fronts Important Words and Terms for Exam 4 Absolute humidity and relative humidity. Artic, Pacific, Gulf and desert air masses. Celsius and Fahrenheit. Cold fronts; occluded fronts and warm fronts. Deserts and rain forests. Dew Point. Dry and wet adiabatic lapse rates. Environmental lapse rate. Equatorial low; polar high; subtropical high; subpolar low. Greenhouse gases: carbon dioxide and water vapor. Hadley Cells; Ferrel Cells and Polar Cells. High pressure; low pressure. Intertropical Convergence Zone (ITCZ). Latent heat and sensible heat. Latitude: Equator; north and south poles, 30o and 60o north and south. Moisture and humidity. Orographic lifting; frontal lifting and frontal lifting. Rising and sinking air: Standing high- and lowpressure zones. Rotating and Non-rotating Earth. Stable; unstable and conditionally unstable air. Surface winds: polar easterlies; p...