Journal of Geo-information Science >
Spatio-Temporal Variability of Typhoon in the Recent 30 Years in the Northwest Pacific
Received date: 2011-12-13
Revised date: 2012-08-23
Online published: 2012-10-25
Tropical cyclones (TCs) over the Northwest Pacific play an important role on climate change. Based on the Yearbook of Tropical Cyclones during the period of 1981-2010 and the developer kit of ArcEngine 9.3, this paper analyses the TCs' time characteristics and space characteristics and spatio-temporal characteristics. We have constructed a typhoon disaster geographic information system, which includes typhoon information point database and line database. The function of the database includes: login interface, map search attribute, property search map, database analysis and processing function. Our main conclusions are as follows: firstly, the Northwest Pacific typhoon occurred 905 times and average 30.2 times per year. The typhoons mainly occurred during the period from July to October that covered a proportion of 35.7%. The frequency of typhoons in August reached the peak and covered the ratio of 21.5%. February is the most difficult month of typhoon and the occurrence frequency is only 0.6%. Powerful typhoon and super typhoon mainly focused on August to October. Secondly, the birthplace of typhoon showed a characteristic of with latitude and longitude band, mainly distributed over regions of (10°~22°N, 112°~120°E), (8°~20°N, 126°~134°E) and (6°~20°N, 136°~150°E). Thirdly, the birthplaces of typhoon presented significant seasonal variation. In summer, typhoon distributed over north and west area, then gradually shifted south and east until to north and west in winter. Typhoon birthplace showed significant monthly variation that scattered in January-April, shifted to north and west from May to June, spread north and east in July, was westward in August-September and southward in October. In September, the sources were relatively concentrated. In November-December, typhoon sources significantly reduced.
YANG Cai-Gong, XUE Cun-Jin-*, JI Min . Spatio-Temporal Variability of Typhoon in the Recent 30 Years in the Northwest Pacific[J]. Journal of Geo-information Science, 2012 , 14(5) : 611 -617 . DOI: 10.3724/SP.J.1047.2012.00611
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