Tidal regime change due to the large scale of reclamation in the west coast of the Korean Peninsula in the Yellow and East China Seas

2013 ◽  
Vol 65 ◽  
pp. 254-259 ◽  
Author(s):  
Sok Kuh Kang ◽  
Kyung Tae Jung ◽  
Eun Jin Kim ◽  
Jae Kwi So ◽  
Jong Jin Park
Keyword(s):  
West Coast ◽  
Korean Peninsula ◽  
Large Scale ◽  
Regime Change ◽  
East China ◽  
China Seas ◽  
The West ◽  
Tidal Regime

scholarly journals Climatological Features of Korea-Landfalling Tropical Cyclones

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Jae-Won Choi ◽  
Yumi Cha ◽  
Hae-Dong Kim ◽  
Sung-Dae Kang
Keyword(s):  
East China Sea ◽  
West Coast ◽  
Korean Peninsula ◽  
High Frequency ◽  
Mainland China ◽  
Interdecadal Variation ◽  
East China ◽  
The West ◽  
China Sea ◽  
Fuzzy Clustering Method

The present study analyzed the interdecadal variation by applying the statistical change-point analysis to the frequency of the tropical cyclone (TC) that landed in the Korean Peninsula (KP) for the recent 54 years (1951 to 2004) and performed cluster classification of the Korea-landfall TC tracks using a Fuzzy Clustering Method (FCM). First, in the interdecadal variation analysis, frequency of TC that landed in the KP was largely categorized into three periods: high frequency period from 1951 to 1965, low frequency period from 1966 to 1985, and high frequency period from 1986 to 2004. The cluster analysis result of the Korea-landfall TC tracks produced the optimum number of clusters as four. In more detail, Cluster A refers to a pattern of landing in the southern coast in the KP starting from East China Sea followed by heading north while Cluster B refers to a pattern of landing in the west coast of the Korean Peninsula, also starting from East China Sea followed by heading north. Cluster C refers to a pattern of landing in the southern region of the west coast in the KP moving from mainland China while Cluster D refers to a pattern of landing in the mid-north region of the west coast in the Korean Peninsula, also moving from mainland China.

A Model of Seawater Structure Near the West Coast of Vancouver Island, British Columbia

1963 ◽  
Vol 20 (4) ◽  
pp. 939-967 ◽  
Author(s):  
Robert K. Lane
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Large Scale ◽  
Coastal Region ◽  
Vancouver Island ◽  
Structural Elements ◽  
The West ◽  
Characteristic Structure ◽  
Oceanographic Data ◽  
Vertical Sections

Oceanographic data collected in a line of stations extending seaward of the west coast of Vancouver Island, British Columbia, were reviewed and analyzed. On the basis of these data and the large-scale meteorological processes of wind, insolation, and precipitation, the characteristic structure of temperature and salinity in the coastal region was denned in five temporal stages throughout the year. These stages are presented as vertical sections along the line with characteristic ranges of values to be found in each of the structural elements.

scholarly journals Migration Patterns of the Emerging Plant Pathogen Phytophthora ramorum on the West Coast of the United States of America

2009 ◽  
Vol 99 (6) ◽  
pp. 739-749 ◽  
Author(s):  
S. Prospero ◽  
N. J. Grünwald ◽  
L. M. Winton ◽  
E. M. Hansen
Keyword(s):  
United States ◽  
Genetic Structure ◽  
West Coast ◽  
Large Scale ◽  
Reproductive Mode ◽  
The United States ◽  
Phytophthora Ramorum ◽  
The West ◽  
Migration Patterns ◽  
High Incidence

Phytophthora ramorum (oomycetes) is the causal agent of sudden oak death and ramorum blight on trees, shrubs, and woody ornamentals in the forests of coastal California and southwestern Oregon and in nurseries of California, Oregon, and Washington. In this study, we investigated the genetic structure of P. ramorum on the West Coast of the United States, focusing particularly on population differentiation potentially indicative of gene flow. In total, 576 isolates recovered from 2001 to 2005 were genotyped at 10 microsatellite loci. Our analyses of genetic diversity and inferences of reproductive mode confirm previous results for the Oregon and California populations, with the strong majority of the genotypes belonging to the NA1 clonal lineage and showing no evidence for sexual reproduction. The high incidence of genotypes shared among populations and the lack of genetic structure among populations show that important large-scale, interpopulation genetic exchanges have occurred. This emphasizes the importance of human activity in shaping the current structure of the P. ramorum population on the West Coast of the United States.

A WRF Modeling Study on the Effects of Land Use Changes on Fog Off the West Coast of the Korean Peninsula

2019 ◽  
Vol 176 (10) ◽  
pp. 4623-4640 ◽  
Author(s):  
Chang Ki Kim ◽  
Seong Soo Yum ◽  
Hyun-Goo Kim ◽  
Yong-Heack Kang
Keyword(s):  
Land Use ◽  
West Coast ◽  
Korean Peninsula ◽  
Land Use Changes ◽  
The West ◽  
Wrf Modeling ◽  
Effects Of Land Use ◽  
Modeling Study

scholarly journals Dynamics of Landfalling Atmospheric Rivers over the North Pacific in 30 Years of MERRA Reanalysis

2014 ◽  
Vol 27 (18) ◽  
pp. 7133-7150 ◽  
Author(s):  
Ashley E. Payne ◽  
Gudrun Magnusdottir
Keyword(s):  
Rossby Wave ◽  
West Coast ◽  
Wave Breaking ◽  
Moisture Transport ◽  
Large Scale ◽  
Eastern Pacific ◽  
The West ◽  
Atmospheric Rivers ◽  
Rossby Wave Breaking ◽  
Upper Level

Abstract A large-scale analysis of landfalling atmospheric rivers (ARs) along the west coast of North America and their association with the upper-tropospheric flow is performed for the extended winter (November–March) for the years 1979–2011 using Modern-Era Retrospective Analysis for Research and Applications (MERRA) reanalysis data. The climatology, relationship to the El Niño–Southern Oscillation and the Madden–Julian oscillation, and upper-level characteristics of approximately 750 landfalling ARs are presented based on the 85th percentile of peak daily moisture flux. AR occurrence along the West Coast is dominated by early season events. In composites of upper-level fields during AR occurrences, certain characteristics stand out irrespective of the tropical climate indices. This suggests that extratropical dynamical processes play a key role in AR dynamics. The influence of the large-scale circulation on AR intensity prior to landfall is examined by objectively selecting an extreme subset of 112 landfalling AR dates representing the 95th percentile of strongest cases. Each landfalling AR date that is identified is traced backward in time using a novel semiautomated tracking algorithm based on spatially and temporally connected organized features in integrated moisture transport. Composites of dynamical fields following the eastward progression of ARs show a close relationship of the location of the jet, Rossby wave propagation, and anticyclonic Rossby wave breaking in the upper troposphere of the eastern Pacific and moisture transport in the lower troposphere. Comparison between the strongest and the weakest ARs within the most extreme subset shows differences in both the intensity of moisture transport and the scale and development of anticyclonic Rossby wave breaking in the eastern Pacific.

Worming its way in—Polydora websteri (Annelida: Spionidae) increases the number of non-indigenous shell-boring polydorin pests of cultured molluscs in South Africa

Zootaxa ◽  
2021 ◽  
Vol 4969 (2) ◽  
pp. 255-279
Author(s):  
NICOLA RODEWALD ◽  
REINETTE SNYMAN ◽  
CAROL A. SIMON
Keyword(s):  
South Africa ◽  
West Coast ◽  
Large Scale ◽  
18S Rrna ◽  
Cyt B ◽  
The West ◽  
Modern Culture ◽  
Mitochondrial Coi ◽  
The Usa ◽  
Global Route

Polychaete worms of the Polydora-complex (commonly referred to as polydorins) include some of the most common pests of cultured molluscs. Modern culture of molluscs, particularly oysters, is associated with large-scale movement of stock which facilitates movement of polydorins either as “hitchhikers” on the transported molluscs or in the packaging. In 2009, a species identified as Polydora cf. ciliata Johnston, 1838 was reported from oysters in a culture facility in Port Elizabeth, South Africa. Since then, more specimens of this species were recorded on farmed oysters from Namibia, Kleinzee and Paternoster on the west coast of South Africa, but tentatively reidentified as Polydora cf. websteri Hartman in Loosanoff and Engle, 1943 based on morphology and limited genetic evidence. The main aim of this study is therefore to clarify the identity of these specimens by integrating morphological and genetic (mitochondrial COI, Cyt b and nuclear 18S rRNA) evidence. Specimens from South Africa match the morphology of the lectotype of P. websteri and are morphologically and genetically very similar to P. websteri from Australia, China, Japan, and the east, gulf and west coasts of the USA. This confirms the presence of P. websteri in South Africa, making this the second most widespread polydorin pest of aquaculture known. Understanding the full distribution range of the species will help to better understand its global route of invasion and consequently assist with preventing or at least minimising further spread. Polydora websteri increases the number of polydorin pests in South Africa to seven. 

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