Idatha yezinzwa zemvula ezitholakalayo ukuze kuthuthukiswe izilinganiso zemvula

Izilinganiso zemvula ezinembile ezinesisombululo esiphezulu sendawo nesikhathi zibalulekile ekusetshenzisweni kwamanzi asemadolobheni, futhi uma zilungiswa ngokubheka komhlaba, idatha ye-radar yesimo sezulu inamandla kulezi zinhlelo zokusebenza.

Nokho, ubuningi bezilinganiso zemvula zesimo sezulu zokulungisa buvame ukuba buncane futhi abusakazeki ngendlela efanayo esikhaleni. Izinzwa zemvula ezinethuba zinikeza ubuningi obukhulu bokubuka komhlaba kodwa ngokuvamile ngokunemba okuncishisiwe noma okungaziwa esiteshini ngasinye. Leli phepha libonisa ukuhlanganiswa kwedatha evela ku-radar yesimo sezulu, iziteshi zesimo sezulu zomuntu siqu, kanye nezixhumanisi ze-microwave zezentengiselwano kumkhiqizo wemvula ohlanganisiwe. Ukuhlanganisa izilinganiso zemvula ezinethuba kuboniswa ukuthuthukisa ukunemba kokubuka kwemvula okunethuba nge-algorithm yokulawula ikhwalithi. Kulesi sifundo, sibonisa ukuthi ukunemba kwezilinganiso zemvula kuthuthukiswa kakhulu ngokuhlanganisa idatha yemvula enethuba kanye nedatha ye-radar yesimo sezulu uma kuqhathaniswa nokunemba komkhiqizo ngamunye wemvula ngaphandle kokuhlanganiswa. Amanani okusebenza kahle kwe-Nash-Sutcliffe (NSE) afinyelela ku-0.88 atholakala emikhiqizweni yemvula ehlanganisiwe yansuku zonke, kuyilapho amanani e-NSE emikhiqizo yemvula ngayinye asukela ku-−7.44 kuya ku-0.65, futhi ukuthambekela okufanayo kuyabonwa ngamanani ephutha eliphakathi nendawo (RMSE). Ngokuhlanganisa idatha ye-radar yesimo sezulu kanye nedatha yemvula enethuba, indlela entsha, okungukuthi, "ukulungiswa kwe-median bias" kwethulwa. Ngokusebenzisa le ndlela, umkhiqizo wemvula osebenza kahle kakhulu utholakala ngokuzimela kuma-rain gauge ajwayelekile asezingeni eliphezulu, asetshenziswa kulolu cwaningo kuphela ukuze kuqinisekiswe ngokuzimela. Ngaphezu kwalokho, kuboniswa ukuthi izilinganiso zemvula ezinembile zingatholakala ngokuhlanganiswa kwansuku zonke, okugcizelela ukubaluleka kokuhlanganiswa ekusetshenzisweni kwe-nowcasting kanye nezinhlelo zokusebenza zesikhathi sangempela.