Malam kutub
Malam kutub terjadi ketika keadaan malam hari berlangsung lebih dari 24 jam. Peristiwa ini hanya terjadi di lingkaran kutub.[1]
Referensi sunting
- ^ Burn, Chris. The Polar Night (PDF). The Aurora Research Institute. Diarsipkan dari versi asli (PDF) tanggal 2014-01-10. Diakses tanggal 3 Oktober 2013.
Bacaan tambahan sunting
- Hansen, V.; Lund, E.; Smith-Sivertsen, T. (March 1998). "Self-reported mental distress under the shifting daylight in the high north". Psychological Medicine. 28 (2): 447–452. doi:10.1017/S0033291797006326. PMID 9572101.
Pranala luar sunting
- The polar night and polar darkness Diarsipkan 2012-09-04 di Wayback Machine.
- Many years' of webcam pictures from Tromsø, Norway. These clearly show the progression into and away from winter at a latitude within the Arctic Circle.