棉兰老岛东部南苏里高省希纳图安市降雨量的气候学分析--菲律宾最潮湿的地方

IF 2.8 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Lyndon Mark P. Olaguera, John A. Manalo
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引用次数: 0

摘要

对菲律宾大气地球物理和天文服务管理局(PAGASA)从 1979 年到 2019 年的 43 个同步站的日降雨量记录进行分析后发现,就年平均总降雨量而言,菲律宾最潮湿的站点位于棉兰老岛东部的南苏里高省希纳图安市。尽管该站海拔较低(海拔 3 米),但年平均总降雨量约为 4554 毫米,比全国海拔最高(海拔 1500 米)的碧瑶市站年平均总降雨量多出约 700 毫米。对降雨量统计特征的进一步分析,以及与其他站点在降雨强度、频率、持续时间(即从降雨强度、频率、持续时间(即短时(1 - 2 天)、中时(3 - 7 天)、长时(8 - 14 天)和超长时(> 14 天))和第 95 百分位极值等方面进一步分析其统计特征并与其他站点进行比较,结果表明,该站在湿润月(200-500 毫米月-1)和暴雨月(> 500 毫米月-1)的频率、1 月至 4 月的月平均降雨量以及短时类的平均降雨量方面均居首位。此外,还量化了热带气旋(TC)、低压系统(LPS)和马登-朱利安涛动(MJO)等多尺度因素对希纳图安市站极端降雨量的影响。结果表明,热带气旋、低压系统和马德登-朱利安涛动对希纳图安市站月极端降雨量的贡献率分别为 0-5%、0-38% 和 3-38%。当 MJO 活跃时,TC 或 LPS 位于以希纳图安市站为中心的 1100 公里半径范围内,它们对月极端天气的贡献率分别为 0-4%和 0-12%。极值的最大部分与其他不明因素有关,其贡献率约为 49-71%。这项研究的结果可作为今后分析菲律宾降雨量空间变化特征的基础,包括极端降雨量的变化及其潜在原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Climatological analysis of rainfall over Hinatuan City, Surigao del Sur in eastern Mindanao—the wettest location in the Philippines

Climatological analysis of rainfall over Hinatuan City, Surigao del Sur in eastern Mindanao—the wettest location in the Philippines

Analysis of the daily rainfall records from 43 synoptic stations of the Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) from 1979 to 2019 reveals that the wettest station in the Philippines is in Hinatuan City, Surigao del Sur, in eastern Mindanao Island in terms of the mean annual total rainfall. Despite being located at a low elevation (∼ 3 m above sea level), the mean annual total rainfall in this station is about 4554 mm, which is approximately 700 mm more than the mean annual total rainfall in Baguio City station, the station with the highest elevation (∼ 1500 m above sea level) in the country. Further analysis of the statistical characteristics of rainfall and comparison with other stations in terms of intensity, frequency, duration (i.e., short (1 − 2 days), medium (3 − 7 days), long (8 − 14 days), and very long (> 14 days) events), and 95th percentile extremes show that this station ranks first in terms of the frequency of wet months (200–500 mm month− 1) and heavy rainfall months (> 500 mm month− 1), mean monthly rainfall amounts from January to April, and the mean rainfall amount in the short duration category. The contributions of multiscale factors such as Tropical Cyclones (TCs), Low Pressure Systems (LPSs), and the Madden-Julian Oscillation (MJO) to the rainfall extremes over Hinatuan City station are also quantified. The results show that TCs, LPSs, and MJO contribute about 0–5%, 0–38%, 3–38% to the monthly extremes over Hinatuan City station, respectively. Cases when TCs or LPSs are located within 1100 km radius centered at Hinatuan City station while MJO is active were also found and their contributions to the monthly extremes are 0–4% and 0–12%, respectively. The largest portion of the extremes are associated with other unaccounted factors, which contribute about 49–71%. The results of this study may serve as a basis for future characterization of the spatial variation of rainfall including the variations in extremes and their potential causes over the Philippines

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来源期刊
Theoretical and Applied Climatology
Theoretical and Applied Climatology 地学-气象与大气科学
CiteScore
6.00
自引率
11.80%
发文量
376
审稿时长
4.3 months
期刊介绍: Theoretical and Applied Climatology covers the following topics: - climate modeling, climatic changes and climate forecasting, micro- to mesoclimate, applied meteorology as in agro- and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere - effects of anthropogenic and natural aerosols or gaseous trace constituents - hardware and software elements of meteorological measurements, including techniques of remote sensing
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