Rainfall data are also available in GeoNetwork for the whole African continent and the following Regions : Western Africa, Eastern Africa and Southern Africa.Īn interpolation method (Kriging) is applied to input data.ĭata input for rainfall maps are provided by Global Precipitation Climatology Centre (GPCC) operated by the Deutscher Wetterdienst (DWD, National Meteorological Service of Germany). Maps on monthly total rainfall amount (in millimeters) and monthly rainfall percentage of normals 1961-1990 (in percentage) from August 2004 to October 2008 are available here for download for Northern Africa. Global Assessment Report on Disaster Risk Reduction 2015 (1).FAO-UN - Geospatial Coordination Unit - Climate, Biodiversity, Land and Water Department (CB) (1).Max-Planck-Institute for Biogeochemistry (1).FAO-UN - Land and Water Division (CBL) (1).Centre for World Food Studies (SOW-VU) (2).Climatic Research Unit - School of Environmental Sciences (2).FAO-UN - AGLL (ex-FAO Land and Water Division) (2).OKACOM - The Permanent Okavango River Basin Water Commission (2).FAO-UN - Climate and Environment Division (CBC) (8).FAO-UN - ex-FAO Agrometeorology Group of Sustainable Development Department (8).Food and Agriculture Organization of the United Nations (18).International Institute for Applied Systems Analysis (IIASA) (19).FAO - Aquaculture Management and Conservation Service (FIMA) (20).Climatology, meteorology, atmosphere (63).This intricate pattern in the diurnal cycle of precipitation reflects the complex coastlines and topography of the region, both of which are challenges to global weather and climate models.Precipitation 68 record(s) Type of resources Over ocean, precipitation reaches a peak at about midnight over the coastal waters but later in the morning in the open ocean. Over land, thunderstorms form in the afternoon near the coast but later in the evening further inland. Diurnal cycle of the Maritime Continentĭuring the inter-monsoon season from March to May, the heating from the sun plays a strong role in driving precipitation. In the Gulf of Mexico, precipitation is highest at noon due to the land-sea breeze. Over the Gulf Stream, the precipitation reaches a maximum in the early morning. Over the ocean, the dynamics are different. Over the Great Plains, eastward-marching nocturnal storms bring precipitation late at night and in the early morning hours. has a high average precipitation in the late afternoon and early evening. Diurnal cycle of the Contiguous United States in Summerĭriven by the ubiquitous afternoon thunderstorms that form as a result of the build-up of energy from the sun's heat, the southeastern U.S. This transformation allows us to compare the diurnal cycle between regions that are far apart without having to account for the difference in time zones. 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. Download NetCDF files of the IMERG V06 Final Run Daily Climatologyĭownload this video (right-click -> Save As).This animation shows the average amount of precipitation that falls on each day of the year (mm/day), computed from 2001 - 2018.
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