Orographic effects on heavy rainfall events over northeastern Taiwan during the northeasterly monsoon season

Chen, Ching-Sen; Lin, Yuh-Lang; Zeng, Huiting; Chen, Chih‐Ying; Liu, Che-Ling

doi:10.1016/j.atmosres.2012.10.008

Cited by 35 publications

(19 citation statements)

References 19 publications

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“…On the other hand, heavy precipitation events may also be induced by several orographic effects. Chen et al (2010Chen et al ( , 2011 identified that orographic lifting and convergence at low-levels caused by the flow deflection due the local orography was related to other precipitation events over Taiwan. In Jeju island, for example, the orographic blocking inducing convergence zones or the intensification of convective cells in the lee side of the elliptical island were some mechanisms favouring heavy precipitation (Lee et al, 2010(Lee et al, , 2014.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of significant orographic precipitation in Madeira island

Couto

Ducrocq

Salgado

et al. 2016

Atmospheric Research

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High-resolution simulations of high precipitation events with the MESO-NH model are presented, and also used to verify that increasing horizontal resolution in zones of complex orography, such as in Madeira island, improve the simulation of the spatial distribution and total precipitation. The simulations succeeded in reproducing the general structure of the cloudy systems over the ocean in the four periods considered of significant accumulated precipitation. The accumulated precipitation over the Madeira was better represented with the 0.5 km horizontal resolution and occurred under four distinct synoptic situations. Different spatial patterns of the rainfall distribution over the Madeira have been identified.

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Section: Introductionmentioning

confidence: 99%

Numerical simulations of significant orographic precipitation in Madeira island

Couto

Ducrocq

Salgado

et al. 2016

Atmospheric Research

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“…In the sensitivity experiments, topography was modified only in D3 domain according to the methodology of Miao et al (2003) and Koletsis et al (2009Koletsis et al ( , 2010. Chiao et al (2004) and Chen et al (2010Chen et al ( , 2011Chen et al ( , 2013) followed a similar procedure in their numerical experiments on the role of orography, with no modifications at the topography of their external grid. Figure 1 illustrates the actual topography of Greece and the three nested domains.…”

Section: Data Sources and Model Setupmentioning

confidence: 99%

Numerical modeling and analysis of the effect of complex Greek topography on tornadogenesis

Matsangouras

Pytharoulis

2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Tornadoes have been reported in Greece over recent decades in specific sub-geographical areas and have been associated with strong synoptic forcing. While it has been established that meteorological conditions over Greece are affected at various scales by the significant variability of topography, the Ionian Sea to the west and the Aegean Sea to the east, there is still uncertainty regarding topography's importance on tornadic generation and development.The aim of this study is to investigate the role of topography in significant tornadogenesis events that were triggered under strong synoptic scale forcing over Greece. Three tornado events that occurred over the last years in Thebes (Boeotia, 17 November 2007), Vrastema (Chalkidiki, 12 February 2010) and Vlychos (Lefkada, 20 September 2011) were selected for numerical experiments. These events were associated with synoptic scale forcing, while their intensities were T4-T5 (on the TORRO scale), causing significant damage. The simulations were performed using the non-hydrostatic weather research and forecasting model (WRF), initialized by European Centre for Medium-Range Weather Forecasts (ECMWF) gridded analyses, with telescoping nested grids that allow for the representation of atmospheric circulations ranging from the synoptic scale down to the mesoscale. In the experiments, the topography of the inner grid was modified by: (a) 0 % (actual topography) and (b) −100 % (without topography), making an effort to determine whether the occurrence of tornadoes -mainly identified by various severe weather instability indices -could be indicated by modifying topography. The principal instability variables employed consisted of the bulk Richardson number (BRN) shear, the energy helicity index (EHI), the storm-relative environmental helicity (SRH), and the maximum convective available potential energy (MCAPE, for parcels with maximum θ e ). Additionally, a model verification was conducted for every sensitivity experiment accompanied by analysis of the absolute vorticity budget.Numerical simulations revealed that the complex topography constituted an important factor during the

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“…Additionally, the combined and sometimes unexpected effects of synoptic and intraseasonal interactions (and their sensitivity to terrain) are emerging as important topics based on relatively coarse grain observational and reanalysis evidence [ Hattori et al , ]. Recent atmospheric modeling studies at varying resolutions for Malaysia (15 km) [ Juneng et al , ], Taiwan (2 km) [ Chen et al , ], and Madeira (1 km) [ Couto et al , ] have examined orographic effects on extreme precipitation during synoptic events. But these topics have not been explored within the context of a high‐resolution two‐way coupled model.…”

Section: Introductionmentioning

confidence: 84%

Multiscale influences on extreme winter rainfall in the Philippines

et al. 2015

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During 2007During -2008, the Philippines experienced the greatest rainfall in 40 winters. We use a combination of observations (including 48 meteorological stations distributed throughout the islands, Tropical Rainfall Measuring Mission satellite-sensed precipitation, and shipboard measurements) along with a high-resolution two-way coupled ocean/atmosphere model (3 km Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS)®) to examine this anomalous season. As expected from climatology, rainfall was greatest on the eastern side of the archipelago, with seasonal totals exceeding 4000 mm in some locations. A moderate to strong La Niña increased the rainfall across the region. But discrete precipitation events delivered the bulk of the rain to the area and coincided with intense Madden-Julian oscillation activity over the archipelago and a late February cold surge. General patterns and magnitudes of rainfall produced by the two-way coupled model agreed with observations from land and from space. During the discrete events, the 3 km COAMPS also produced high amounts of precipitation in the mountainous parts of central Philippines. Direct observations were limited in this region. However, the government reported river flooding and evacuations in Mindoro during February 2008 as a result of significant rainfall. In addition, shipboard measurements from late January 2008 (collected by the Philippines Straits Dynamics Experiment) reveal a fresh lens of water to the west of the island of Mindoro, consistent with high freshwater discharge (river runoff) into the coastal area.

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Orographic effects on heavy rainfall events over northeastern Taiwan during the northeasterly monsoon season

Cited by 35 publications

References 19 publications

Numerical simulations of significant orographic precipitation in Madeira island

Numerical simulations of significant orographic precipitation in Madeira island

Numerical modeling and analysis of the effect of complex Greek topography on tornadogenesis

Multiscale influences on extreme winter rainfall in the Philippines

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