LOKUS ANOMALI VEKTOR ANGIN YANG BERDAMPAK PADA KEKERINGAN DI NUSA TENGGARA BARAT
Keywords:
kepemilikan manajerial, risk taking, kinerja perusahan, return sahamAbstract
Anomali vektor angin ditengarai menyebabkan kekeringan di suatu wilayah. Penelitian Deskriptif dilakukan untuk mengidentifikasi lokus anomali vektor angin yang berakibat kekeringan di NTB. Vektor angin global periode 1983-2019 digunakan untuk melokalisasi lokus anomali dan data curah hujan digunakan untuk memverifikasi kejadian tahun-tahun kering di Lombok dan Sumbawa. Keeratan hubungan antara lokus anomali dan kejadian kekeringan diuji dengan regresi linier ganda. Sifat ketergantuangan antara lokus dan kejadian kekeringan diuji dengan dependency test. Hasil penelitian menunjukkan, bahwa kejadian kekeringan terkait dengan anomali vektor angin di tiga lokasi, dan kedunya memiliki ketergantungan, yaitu: di zona konvergen Samudera Hindia Selatan (SIO) pada bujur 105o-110o BT dan 8,5o-15oLS; di pesisir barat Sumatera (WCS) pada 95o-110oBT dan 5oLU-5oLS, dan di laut Natuna (NAS) pada 105o-115oBT dan 5oLU-10oLU. Fungsi linier ganda yang representatif untuk pulau Lombok adalah: Y(SPI)=0.648 - 0.108(SIO) - 0.066(WCS) - 0.165(NAS); R2= 0.75 dan untuk Sumbawa:Y(SPI) = 1.685-0.1497(SIO) -0.0478(WCS) - 0.3445(NAS); R2=0.92. Kesimpulan, kekeringan di NTB terkait anomali vektor angin di zona konvergen samudera Hindia Selatan, pantai barat Sumatera dan laut Natuna, pada awal musim (November, Desember, dan puncak musim hujan (Februari).References
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