Decadal oscillation of spring rain in northern Taiwan

Hung, Chih Wen; Hsu, Huang‐Hsiung; Lu, Mong Ming

doi:10.1029/2004gl021344

Cited by 42 publications

(49 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other moving-window sizes (e.g., 21 years as adopted by Hung et al, 2004) have been tested as well, and the results are very similar 20 to (but less pronounced than) those presented herein.…”

Section: Regime Shifts In the Correlationsupporting

confidence: 65%

On the Relationship between Teleconnections and Taiwan's Streamflow: Evidence of Climate Regime Shift and Implications for Seasonal Forecasting

Chen

Lee

2016

Preprint

View full text Add to dashboard Cite

Abstract. Interannual variations of catchment streamflow represent an integrated response to anomalies in regional moisture transport and atmospheric circulations, ultimately linked to large-scale climate oscillations. This study investigates the relationship between Taiwan's long-term summertime (July to September, JAS) streamflow and manifold teleconnection patterns. Discussion about the changes in pattern correlation and composite maps before and after the change point is carried out, and our results suggest that empirical forecasting techniques should take into account the effect of CRS on predictor screening.

show abstract

Section: Regime Shifts In the Correlationsupporting

confidence: 65%

On the Relationship between Teleconnections and Taiwan's Streamflow: Evidence of Climate Regime Shift and Implications for Seasonal Forecasting

Chen

Lee

2016

Preprint

View full text Add to dashboard Cite

show abstract

“…For instance, the spring rain in this region has a distinct characteristic; its rainfall is also very significant (Tian and Yasunari 1998). Some studies (Hung et al 2004;Jiang et al 2003) show that the spring rainfall over the WNP-EA has a strong interannual variation associated with El Niñ o-Southern Oscillation (ENSO) and an interdecadal variation associated with the Pacific decadal oscillation (PDO). Other studies (e.g., Chou 2004;Lau and Nath 2006;Wang et al 2000;Wu et al 2003;Zhang et al 1996Zhang et al ,1999Zhang and Sumi 2002) also showed the relationship between rainfall over the WNP-EA region and ENSO in different seasons.…”

Section: Introductionmentioning

confidence: 99%

Annual Cycle of Rainfall in the Western North Pacific and East Asian Sector

et al. 2009

View full text Add to dashboard Cite

The annual cycle of precipitation over the western North Pacific and East Asian (WNP-EA) sector has five major periods: spring, the first and second wet periods, fall, and winter. In this study, processes that induce precipitation in each period are examined from a large-scale point of view. The wet phase over this sector has two distinct periods, which are dominated by the Asian summer monsoon circulation induced by the land-ocean contrast of net energy into the atmospheric column (F net ). In the first wet period, the pre-mei-yu/mei-yu rainband is directly associated with a moisture flux convergence caused by the southwesterly Asian summer monsoon flow and the southeasterly trade winds, and indirectly associated with a dynamic feedback induced by this horizontal moisture convergence. The tropical convection, in the meantime, is associated with a rising motion that is induced by positive F net . In the second wet period, the WNP summer monsoon gyre dominates the rainfall of this region, which is partially associated with warmer local sea surface temperature (SST) via positive F net . The land-sea contrast of F net and the atmosphere-ocean interaction also play an important role in establishing the monsoon gyre. The dry phase over the WNP-EA region is the winter period in which precipitation is associated with winter storm activities and large-scale lifting associated with a pressure surge. In the two transition phases, due to a difference in heat capacity, the atmosphere and ocean have distinct impacts on precipitation, albeit similar solar insolations during the two periods. In the spring period, the atmospheric condition is favorable for convection, while the ocean surface is relatively colder, so the horizontal moisture advection associated with the westward extent of the Pacific subtropical high, which is different from a typical winter frontal system, is a major source for the spring rain. In the fall period, however, the atmospheric conditions dominated by the Asian winter monsoon circulation suppress convection, while relatively warmer SST still maintains tropical convection over the southern part of the WNP-EA region. Over the northern part of the WNP-EA region, the fall precipitation is associated with frontal systems, similar to those in winter.

show abstract

“…1c). As such, total spring rainfall and its variability become more significant over northern Taiwan than southern Taiwan (Hung et al 2004). Jiang et al (2003) and Chen et al (2003) found that spring rainfall variability in Taiwan tends to be positively correlated with the preceding winter Niño-3 sea surface temperature (SST).…”

Section: Introductionmentioning

confidence: 99%

Asymmetry of the El Nino-Spring Rainfall Relationship in Taiwan

Chen

Shih³

2008

Journal of the Meteorological Society of Japan

View full text Add to dashboard Cite

Spring rainfall in Taiwan can be either enhanced or suppressed by an El Niño event, revealing an asymmetric relationship. This observational study aims at examining this asymmetric relationship and associated large-scale dynamic processes. Analysis results disclose four major El Niño/Southern Oscillation (ENSO)-spring rainfall relationship types during 1950-2003: El Niño-anomalous wet (EN-w) type, La Niña-anomalous dry (LN-d) type, El Niño-anomalous dry (EN-d) type, and La Niña-anomalous wet (LN-w) type. The EN-w and LN-d (EN-d and LN-w) types exhibit a positive (negative) correlation between the spring rainfall anomaly and the ENSO-related sea surface temperature anomaly (SSTA). The overall ENSO-spring rainfall relationship is dominated by the positive correlation.The cause of the asymmetric ENSO impacts between the positive-and negative-correlation groups is attributed to a connection between ENSO and the Indian Ocean (IO) SSTA and associated large-scale atmospheric circulation. The positive-correlation types tend to concur with an evident ENSO-IO connection, featuring significant in-phase SSTA centers in the tropical eastern Pacific and eastern IO. During the El Niño (La Niña) event, these SST anomalies force a descending (ascending) branch over the western Pacific and help initiate and maintain a lower-level anticyclone (cyclone) anomaly in the Philippine Sea (southeast of Taiwan). Flows west of this anomalous anticyclone (cyclone) enhance (suppress) moisture transport from the South China Sea into Taiwan, resulting in increased (decreased) spring rainfall. For the negative-correlation types, the ENSO-IO connection tends to be weak or broken. The significant SSTA appears only in the tropical eastern Pacific, which induces a major vertical motion branch over the maritime continent. As a result, an anomalous lower-level anticyclone (cyclone) occurs over the Asian continent (west of Taiwan) during the El Niño (La Niña) event. Flows east of this anomalous anticyclone (cyclone) weaken (strengthen) moisture transport from the South China Sea into Taiwan, leading to suppressed (enhanced) spring rainfall.It is also noted that the variability of the Pacific subtropical high (PSH) over the western Pacific is closely linked to these four relationship types. The EN-d (LN-w) type concurs with a moderate westward expansion (eastward retreat) in the western-Pacific sector, while the EN-w (LN-d) type is concurrent with a southward (great eastward) displacement.

show abstract

Decadal oscillation of spring rain in northern Taiwan

Cited by 42 publications

References 17 publications

On the Relationship between Teleconnections and Taiwan's Streamflow: Evidence of Climate Regime Shift and Implications for Seasonal Forecasting

On the Relationship between Teleconnections and Taiwan's Streamflow: Evidence of Climate Regime Shift and Implications for Seasonal Forecasting

Annual Cycle of Rainfall in the Western North Pacific and East Asian Sector

Asymmetry of the El Nino-Spring Rainfall Relationship in Taiwan

Contact Info

Product

Resources

About