L $%675$. 3(1*$58+3(5,67,:$/$1,f$'$1/$1,f$02'2.,7(5+$'$3 $120$/,&85$++8-$1',38/$83$38$ 678',.$686 '(6(0%(5 ±129(0%(5 2OHK $EHGQHJR$QXJUDK3HNHUWL 1,0 3URJUDP6WXGL6DUMDQD0HWHRURORJL &XUDKKXMDQGLVXDWXZLOD\DKGLSHQJDUXKLROHKEHEHUDSDIDNWRUVDODKVDWXQ\DIDNWRU DQWDUWDKXQDQ interannual 'XD FRQWRK IDNWRU DQWDUWDKXQDQ \DQJ PHPHQJDUXKL FXUDKKXMDQDGDODKLa NiñaGDQLa Niña Modoki%DLNLa NiñaPDXSXQLa Niña Modoki GLWHRULNDQ PHQ\HEDENDQ SHQLQJNDWDQ FXUDK KXMDQ GL EHQXD PDULWLP WHUPDVXN 3XODX 3DSXD 3HQHOLWLDQ LQL EHUWXMXDQ XQWXN PHQJHWDKXL NRPSDUDVL GDPSDNLa NiñaGDQLa Niña ModokiWHUKDGDSDQRPDOLFXUDKKXMDQGL3XODX3DSXD GDODP VDWX SHULRGH LNOLP 'HVHPEHU ±1RYHPEHU VHUWD PHQMHODVNDQ PHNDQLVPH WUDQVSRU NHOHPEDSDQ \DQJ PHPHQJDUXKL NRQGLVL WHUVHEXW .DMLDQ GLNHORPSRNNDQVHFDUDPXVLPDQ 'DWD \DQJ GLJXQDNDQ \DLWX SUHVLSLWDVL EXODQDQ GDULClimate Hazards Group InfraRed Precipitation with Station &+,536 VXKX SHUPXNDDQ ODXW 3DVLILN HNXDWRULDOGDULHadley Centre's sea ice and sea surface temperature +DG,667 v1.1 VXKX 1LxR GDUL 3K\VLFDO 6FLHQFHV /DERUDWRU\ 12$$ GDQ IOXNVXDS DLU WHULQWHJUDVLYHUWLNDOGDUL(&0:) Reanalysis Version 5 (5$ Monthly Averaged Data on Single Levels +DVLOSHQHOLWLDQPHQXQMXNNDQEDKZDNHWLNDWHUMDGLLa NiñaDWDXLa Niña Modoki VHSDUXK3XODX3DSXD VLVLVHODWDQ PHUHVSRQVGHQJDQDQRPDOLFXUDKKXMDQSRVLWLI GDQVLIDWKXMDQDWDVQRUPDOVHPHQWDUDLWXVHSDUXKVLVDQ\D VLVLXWDUD PHUHVSRQV GHQJDQDQRPDOLQHJDWLIOHPDK.RQGLVLLQLWDPSDNSDOLQJNXDWSDGDNHMDGLDQPXVLP -XQL-XOL$JXVWXV --$ GDQEHUODQMXWKLQJJDNHMDGLDQPXVLP6HSWHPEHU2NWREHU 1RYHPEHU 621 PHVNLDJDNPHOHPDK$GDSXQDQRPDOLFXUDKKXMDQVDDWNHMDGLDQ '-) WHUPDVXN OHPDKLa Niña Modoki VDDW 0DUHW$SULO0HL 0$0 MXJD PHQ\HEDENDQDQRPDOLSRVLWLIVHSHUWLVDDWPXVLP6217UDQVSRUNHOHPEDSDQNH DUDKVLVLVHODWDQ3XODX3DSXDSDGDXPXPQ\DEHUDVDOGDULODXWDQDUDKWLPXUWHQJJDUD PHPDVXNLVLVLVHODWDQSXODX+DOLQLNRQVLVWHQGHQJDQSHUVHEDUDQDQRPDOLFXUDK KXMDQSRVLWLI\DQJGLGRPLQDVLZLOD\DKVHODWDQSXODXWHUVHEXW$QRPDOLFXUDKKXMDQ \DQJGLVHEDENDQWUDQVSRUNHOHPEDSDQNHWLNDLa Niña OHELKNXDWGDULSDGDNHWLNDLa Niña Modoki .DWD.XQFL La NiñaLa Niña ModokiDQRPDOLFXUDKKXMDQWUDQVSRUNHOHPEDSDQ LL ABSTRACT THE INFLUENCE OF LA NIÑA AND LA NIÑA MODOKI PHENOMENONS TO RAINFALL ANOMALIES IN THE ISLAND OF NEW GUINEA (CASE STUDY: DECEMBER 1990±NOVEMBER 2020) By $EHGQHJR$QXJUDK3HNHUWL 1,0 Undergraduate Program in Meteorology Rainfall in a region is influenced by several factors, one of which is the interannual factor. Two examples of interannual factors that affect rainfall are La Niña and La Niña Modoki. Both La Niña and La Niña Modoki are theorized to cause increased rainfall in maritime continents, including Papua Island. This study aims to compare the impact of La Niña and La Niña Modoki on rainfall anomalies in Papua throughout a climate period (December 1990–November 2020), and to explain the moisture transport mechanisms that influence these conditions. The study was grouped seasonally. The data utilised were monthly precipitation from Climate Hazards Group InfraRed Precipitation with Station (CHIRPS), equatorial Pacific sea surface temperature from Hadley Centre's sea ice and sea surface temperature (HadISST) v1.1, Niño3 temperature from NOAA Physical Sciences Laboratory, and vertically integrated water vapor flux from ECMWF Reanalysis Version 5 ERA5) Monthly Averaged Data on Single Levels. The results of the study show that when La Niña or La Niña Modoki occurs, half of Papua Island (the southern side) responds with positive rainfall anomalies and above-normal rainfall characteristics, while the remaining half (the northern side) responds with weak negative anomalies. This condition appears the strongest during the June-July-August (JJA) season and continues until the September- October-November (SON) season, although it is somewhat weaker. The rainfall anomaly during the December-January-February (DJF) event is weak. La Niña Modoki during March-April-May (MAM) also causes positive anomalies like during the SON season.