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Therefore, 16:00 LST means that it is approximately 4 p.m. The data is transformed from coordinated universal time (UTC) to local solar time (LST) based on its longitude. The strength and timing of the diurnal cycle can vary considerably depending on the geography of the region, particularly in the presence of coastlines and mountains. This causes a daily cycle of precipitation that shows up clearly in animations of the diurnal cycle. Of the many different weather systems that produces precipitation, one key process is direct heating from the sun. The diurnal cycle of precipitation describes the average precipitation over the course of the day. Notable features include the annual cycle of the InterTropical Convergence Zone (ITCZ) following the motion of the Sun (with a time lag) over both land and ocean, the seasonal shift of the Asian Monsoon between South Asia in the boreal summer and Australia in the boreal winter, the North American Monsoon in the late boreal summer in northern Mexico and southwestern U.S., and the dry summer/wet winter pattern in the Mediterranean Sea area and the west coast of the U.S. The daily climatology dataset covers January 2001 to December 2018, computed as a trailing 30-day average to reduce the random noise due to isolated big events. This animation shows the average amount of precipitation that falls on each day of the year (mm/day), computed from 2001 - 2018.ĭownload this video (right-click -> Save As)