[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-217539-en":3,"doc-seo-217539-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},217539,1099514068035,"Ezra","https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c",8,"Research & Report","Radar Rainfall Studies Over Eastern Coast of Northeastern Brazil - Abstract","A WR-110-5/EEC C-band meteorological radar was installed and has operated since the beginning of 2003 along the Eastern Coast of Northeastern Brazil, around 10°S and 36°W. Technical specifications of the radar are provided, and the dynamic mechanisms producing coastal rainfall are reviewed. Disturbances in the easterlies and the associated rainfall are highlighted as key drivers that are difficult to forecast due to mesoscale behavior and insufficient model resolution. Rapid growth can yield severe rainfall exceeding 300 mm day-1 when sea surface temperatures are above 28°C. The radar supports effective nowcasting, with a case study reported for February 19, 2003.","P3B.1  \nRADAR RAINFALL STUDIES OVER EASTERN COAST OF NORTHEAST BRAZIL  \nRicardo Sarmento Tenório*; Luiz Carlos Baldicero Molion Universidade Federal de Alagoas, Maceió, Alagoas, Brazil Henri Sauvageot  \nUniversité Paul Sabatier, Toulouse III, France Demilson de Assis Quintão; Maurício de Agostinho Antonio Instituto de Pesquisas Meteorológicas, UNESP, Bauru, SP, Brazil  \nABSTRACT  \nA WR-110-5/EEC C-band meteorological radar was installed and has been in operation in the Eastern Coast of Northeastern Brazil at about 10°Sand 36°W since the beginning of 2003. Technical specifications of the radar were given. The dynamic mechanisms that produce rain over the Eastern Coast were reviewed. The disturbances in the easterlies, and associated rainfall, is one of the main mechanisms and are difficult to be predicted because they are mesoescale weather events and forecast models do not have high enough resolution to capture them. These disturbances grow very fast and can produce severe weather with rainfall total over 300 mm day-1 if the coastal sea surface temperature were above 28°C. The radar is an invaluable tool for nowcasting these events. A case study of February 19th 2003 was reported.  \n1. INTRODUCTION  \nRainfall is the most important variable in the tropics. Apparently, rainfall seems to be simple of being observed. However, due to the random nature of the growth and development of convective cells, the classical method - the rain gage - is subject to errors that may exceed 100% in particular occasions. In addition, rain gage measurements are punctual, what makes difficult, or almost impossible, to determine the rainfall totals areal distribution with accuracy. So, whenever possible, a weather radar is the preferable instrument for observing rainfall despite the calibration problems involved. The Northeastern Brazil (NEB) is a semi-arid region, with rainfall regimes subject to a great interannual variability due to global scale phenomena such as El Niño-Southern Oscillation events. The region had a well-distributed rain gage network basically from the 1960’s to 1985. However, the network was greatly degraded during the 1990’s due to economic and personnel restrictions, so rainfall sampling and water management became critical issues in the region. In January 2003, a C band weather radar was installed, and has been in operation since then, in the Campus of the Universidade Federal de Alagoas (UFAL), city of Maceió (AL), located approximately at 10°S and 36°W, in the eastern coast of NEB. The cooperation  \n*Corresponding author address: Ricardo S. Tenório, [Univ. Fed. de](Univ. Fed. de) Alagoas/CCEN, Sistema de Radar Meteorológico de Alagoas, 57072-970 Tabuleiro, Maceió -Alagoas Brazil; e-mail: [tenor@radar.ufal.br](tenor@radar.ufal.br)  \nbetween Universidade Estadual Paulista (UNESP), Bauru (SP), Laboratoire d’Aerologie , Université Paul Sabatier(UPS), Toulouse, France, and the Sindicatoda Indústria do Açúcar e do Álcool do Estado de Alagoas (Sugar and Alcohol Industries Union of the State of Alagoas) was vital to accomplish this goal. The benefits for the region include the alert of severe weather for Civil Defense, road transportation, port and airport operations, tourism and water resources management among others. The benefits for the agrarian activities, particularly sugar cane cultivation, that is the main economic activity in the coastal zones in the region, may be enormous . Calheiros and Antonio (1990) and Antonio (1996) estimated an additional gain of about US$40 million resulting from radar information use for the State of São Paulo sugarcane cultivation, in southeastern Brazil. This article aims at divulgation of the Meteorological Radar System of Alagoas (SIRMAL) within the scientific community. The rainfall dynamic mechanisms, that produce rain in the region, and the radar system were described followed by the presentation of results of the first case study, the February 19 2003 thunderstorm.  \n2. A REVIEW OF RAINFAL","cbCaijRFeJrTo3vh","https://ap.wps.com/l/cbCaijRFeJrTo3vh","pdf",130085,1,4,"English","en",105,"# Abstract\n# 1. Introduction\n# 2. A Review of Rainfall Producing Mechanisms","[{\"question\":\"What radar system is described, and where is it deployed?\",\"answer\":\"A WR-110-5/EEC C-band meteorological radar is installed on the Eastern Coast of Northeastern Brazil near 10°S and 36°W, with operations beginning in 2003.\"},{\"question\":\"Why are rainfall disturbances along the coast difficult to predict?\",\"answer\":\"They are mesoscale weather events, and forecast models lack sufficient resolution to capture their development and rainfall impact reliably.\"},{\"question\":\"How can sea surface temperature influence the severity of rainfall?\",\"answer\":\"When coastal sea surface temperatures exceed 28°C, the disturbances can grow rapidly and produce severe rainfall totals over 300 mm per day.\"}]","Radar Rainfall Studies Over Eastern Coast of Northeastern Brazil - Abstract | PDF",1788834270,10,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"radar-rainfall-studies-over-eastern-coast-of-northeastern-brazil-abstract","",{"@graph":36,"@context":85},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/research-report/",3,{"item":52,"name":13,"@type":43,"position":21},"https://docshare.wps.com/document/radar-rainfall-studies-over-eastern-coast-of-northeastern-brazil-abstract/217539/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-11","2026-09-08",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"What radar system is described, and where is it deployed?","Question",{"text":75,"@type":76},"A WR-110-5/EEC C-band meteorological radar is installed on the Eastern Coast of Northeastern Brazil near 10°S and 36°W, with operations beginning in 2003.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"Why are rainfall disturbances along the coast difficult to predict?",{"text":80,"@type":76},"They are mesoscale weather events, and forecast models lack sufficient resolution to capture their development and rainfall impact reliably.",{"name":82,"@type":73,"acceptedAnswer":83},"How can sea surface temperature influence the severity of rainfall?",{"text":84,"@type":76},"When coastal sea surface temperatures exceed 28°C, the disturbances can grow rapidly and produce severe rainfall totals over 300 mm per day.","https://schema.org",{"og:url":52,"og:type":87,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":89,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":92},[93,97,101,105,110,115,120,123,128,131,134],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":94,"show_sort_weight":95,"slug":96},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":98,"show_sort_weight":99,"slug":100},"Literature",80,"literature",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":102,"show_sort_weight":103,"slug":104},"Exam",70,"exam",{"id":106,"doc_module":4,"doc_module_name":46,"category_name":107,"show_sort_weight":108,"slug":109},5,"Comic",60,"comic",{"id":111,"doc_module":4,"doc_module_name":46,"category_name":112,"show_sort_weight":113,"slug":114},6,"Technology",50,"technology",{"id":116,"doc_module":4,"doc_module_name":46,"category_name":117,"show_sort_weight":118,"slug":119},7,"Healthcare",40,"healthcare",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":121,"slug":122},30,"research-report",{"id":124,"doc_module":4,"doc_module_name":46,"category_name":125,"show_sort_weight":126,"slug":127},9,"Religion & Spirituality",20,"religion-spirituality",{"id":126,"doc_module":4,"doc_module_name":46,"category_name":129,"show_sort_weight":126,"slug":130},"World Cup","world-cup",{"id":29,"doc_module":4,"doc_module_name":46,"category_name":132,"show_sort_weight":29,"slug":133},"Lifestyle","lifestyle",{"id":135,"doc_module":4,"doc_module_name":46,"category_name":136,"show_sort_weight":106,"slug":137},19,"General","general"]