The influences of solar radiation changes on the meteorological variables during the total solar eclipse of 9th March 2016 in Central Bangka, Indonesia

摘要

ObservationsofthemeteorologicalvariableshavebeenconductedinTerentangcoastalarea,CentralBangkawhichislocatedintotalitypathofTotalSolarEclipseonMarch9,2016.Thesemeasurementsweremadebefore,during,andafterthesolareclipseusingaportableautomaticweatherstationwith1Hzdatarecordingtoinvestigatetheinfluenceoftotalsolareclipseontheincomingsolarradiationandotherweathervariables.Duetothecloudinessatthefirstphaseoftheeclipse,thereductionoftheradiationwasnotproportionaltothepercentageofthesolarobscuration.Alongwiththedisappearanceofthickclouds,solarradiationchangesreachthelowestvaluefrom123W/m2tozeropointat5minutesbeforethemaximumphase.Incontrasttotheradiationdecrement,decreasingairtemperaturewasnotcomparabletothesolarobscurationbecauseitwasnotonlydeterminedbyradiation,butalsosurroundingenvironment.Highrelativehumidity,onaverage89%,wasdiscoveredasaneffectofthelowatmosphericpressurewhichwasaffectedbytheinsolationdecline.TheeffectoftotalsolareclipsecanbeseenmoreclearlywithspectrumanalysisusingFouriertransformationtoidentifyperiodogrampatternsofeachmeteorologyvariable.Thistransformationproducedaspectrum'speaktotalitywhichishigherthanbeforeandaftertheeventontheinsolation.Thespectrumrepresentsthattotalsolareclipsehasconsiderableeffecttotheincomingsolarradiationandotherswhichisindicatedbythechangeoftheamplitude...