Wpływ cyrkulacji atmosfery na wysokie opady w Hornsundzie (Spitsbergen)

• Autorzy: Niedźwiedź T.

Warianty tytułu

EN

Influence of atmospheric circulation on the high precipitation in Hornsund (Spitsberegen)

• Języki publikacji: PL

Abstrakty

EN

Maximum daily precipitation and the number of days with precipitation 10.0 mm was analysed in Polish Polar Station in Hornsund (Spitsbergen), based on the measurements during 8008 days in the period 1978 June - 2000 July. The geographical coordinates of the station are following: j = 77°00? N, l = 15°33? E, Hs = 11 m a.s.l. This region is characterised by relatively large annual precipitation, varied from 230 mm in 1987 up to 640 mm in 1996. The largest diurnal total of precipitation - 58.3 mm was observed on August 1, 1994. The second high value 52.6 mm was noticed on September 6, 1996. During the observed period only 5 times daily precipitation exceeded 40 mm and 14 time was higher than 30 mm. Return period for possible daily precipitation greater than 70 mm is less than once in a hundred years. In the annual course the maximum of precipitation was observed mainly in August and September. Also the largest precipitation appears most often during the advection of air from the South and South-West with cyclones coming from the Atlantic Ocean. Special attention was made to the daily precipitation >=10 mm. they occurred during the 201 days (2.5%) and bringing about 35% of annual total. The probability of such events is highest in autumn (25%) during the south westerly cyclonic circulation type (SWc). Two other circulation types are caused also such precipitation: southern cyclonic type (Sc) with probability 24% and south westerly anticyclonic ones (SWa), with probability 11.5%. During the last decade of 20th century there was observed the increasing tendency in frequency of large precipitation in Hornsund. The sudden increase take place since 1994. These changes were connected with greater frequency in the intensity of westerly and southerly atmospheric circulation expressed by the zonal and meridional circulation indices.

Słowa kluczowe

PL

cyrkulacja atmosfery; opady atmosferyczne; Spitsbergen

EN

atmospheric circulation; precipitation; Spitsbergen

• Wydawca: Stowarzyszenie Klimatologów Polskich
• Czasopismo: Problemy Klimatologii Polarnej
• Rocznik: 2002
• Tom: nr 12
• Strony: 65--75
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Niedźwiedź T.

• Katedra Klimatologii, Wydział Nauk o Ziemi, Uniwersytet Śląski, Sosnowiec,