Remote effects of tropical cyclones on heavy rainfall over the Korean peninsula – statistical and composite analysis

Kun-Young Byun; Tae-Young Lee

doi:10.3402/tellusa.v64i0.14983

Remote effects of tropical cyclones on heavy rainfall over the Korean peninsula – statistical and composite analysis

Tellus

Volume 64 (2012): Issue 1

By: Kun-Young Byun and Tae-Young Lee

Open Access

|Dec 2012

Abstract

This study investigates the remote effects of tropical cyclones (TCs) on heavy rainfall (HR) over the Korean peninsula through statistical and composite analyses for 1981–2009. Statistical analysis indicates that the 29-year mean annual rainfall occurring with TCs within 3000 km of Korea is 658 mm, 49% of the 29-year total mean annual rainfall of 1340 mm. About 32% of the total mean annual amount occurs with TCs within the range of 1200–2800 km. The probability of HR over the peninsula is higher with TCs that make landfall on southern and eastern China compared to other regions. In the HR composite, the synoptic-scale pressure pattern during the remote TC events is characterised by a synoptic-scale trough to the northwest, a western Pacific subtropical high (WPSH) to the southeast and a TC to the southwest of the Korean peninsula. This pattern results in a region of strong rising motion located beneath the upper-level jet (ULJ) entrance region, concurrent with a region of convective instability enhanced by strong moisture transport and quasi-geostrophic (QG) forcing for ascent by warm-air advection. The composite analysis shows that remote TCs can influence HR over the peninsula by helping to establish a convectively unstable environment and a large-scale convergence of air.

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Articles in this issue

DOI: https://doi.org/10.3402/tellusa.v64i0.14983 | Journal eISSN: 3035-9554

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Language: English

Page range: 14983 - 14983

Submitted on: Apr 15, 2011

Accepted on: Nov 13, 2011

Published on: Dec 1, 2012

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

Keywords:

remote effects,

tropical cyclones,

heavy rainfall,

statistical analysis,

composite analysis

© 2012 Kun-Young Byun, Tae-Young Lee, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 64 (2012): Issue 1