• 検索結果がありません。

Resent Characteristics of the Asian dust in Korea

N/A
N/A
Info
ダウンロード
Protected

Academic year: 2021

シェア "Resent Characteristics of the Asian dust in Korea"

Copied!
2
0
0

読み込み中.... (全文を見る)

今ダウンロードする ( 2 ページ )

全文

(1)

Resent Characteristics of the Asian dust in Korea

著者 Kim Yoon‑Shin journal or

publication title

金沢21世紀COEプログラム主催国際シンポジウム「

東アジアの大気環境汚染と健康生態系への影響」講 演要旨集（東京）

page range 9‑9

year 2006‑09‑23

URL http://hdl.handle.net/2297/2414

(2)

Recent Characteristics of the Asian Dust in Korea

Yoon-Shin Kim

Institute of Environment & Industrial Medicine, Hanyang University, Seoul, Korea

Abstract

This study aims to investigate basic characteristics by understanding the trajectory and analyzing its components of Asian dust which is largely increasing its effect recently on Korean peninsula. This study uses the data observed in Global Atmospheric Watch at Ahan Myeon-Do located in the middle of western Korean peninsula. And ȕ-ray PM

10

sampler for detecting particles, high volume air PM

10

sampler for collection sample to analysis the component of the Asian dust, and ion-chromatography (DX-500) for analyzing water soluble components is instruments used in this study. The statistical processes such as correlation analysis and factor analysis are gone through with the Statistical Version 4.2, HYSPLIT model is used to estimate the trajectory of pollutant.

The results of the study can be summarized as following. First, based on the analysis of the mass concentration observed by the ȕ-ray PM

10

at the Ahan Myeon-Do in each Spring from 2000 to 2002, the ratio between clear and cloudy day is 6.37, 3.48, and 5.05 respectively each year and it proves that the Asian dust has large influence over the Korean Peninsula. Second, the aerosol was collected by Optical Particle Counter (OPC) at Ahan Myoun-Do during the same period and its size distribution is analyzed. It is found that the size of the most effective Asian dust particle is between 3.67 and 6.06ȝm and that of the second most effective particles is between 6.60-10.0ȝm. Third, the water soluble ion component in the sample which was collected by PM10 from 2003 to 2005. In 2003, NOx concentration shows low value of 4.0ȝg/m3, while in 2004 and 2005 its concentration is up to 12.0ȝg/m3 and 3 times higher than that of 2003. Forth, it is found that the characteristics of water soluble component seems to depend on the wind system. The concentration of salt of sulfuric acid is 4 times higher with a air flow from the ocean than that of the flow from the land. However, chlorine shows weak dependency on the air flow system. Lastly, the most dominant heavy metal component in the Asian dust is the magnesium. The density of the magnesium is 1799.8 ȝg/m3 and it is larger than the summation of all the other component of the Asian dust. It seems that the magnesium is the main component of the Asian dust. The second most dominant component is aluminum and its density is 7.31ȝg/m3. The iron and natrium shows similar concentration.

The Asian Dust differs its trajectory depending on the atmospheric conditions in the inflow, Therefore, not only regular monitoring but also scientific analysis should be continuously undertaken and international corporation is necessary because recent characteristics of the Asian dust in Korea may have an more effects on the climate change and ecological balance in the future.

- 9 -

参照

今ダウンロードする ( PDF - 2 ページ - 66.00 KB )

関連したドキュメント

The unique solvability of the problem is established

Kilbas; Conditions of the existence of a classical solution of a Cauchy type problem for the diffusion equation with the Riemann-Liouville partial derivative, Differential Equations,

On the Structure of Isometries between Noncommutative L

Related to this, we examine the modular theory for positive projections from a von Neumann algebra onto a Jordan image of another von Neumann alge- bra, and use such projections

(3.) In the statement of the criterion

Then it follows immediately from a suitable version of “Hensel’s Lemma” [cf., e.g., the argument of [4], Lemma 2.1] that S may be obtained, as the notation suggests, as the m A

The Rational Homotopy of the

Our method of proof can also be used to recover the rational homotopy of L K(2) S 0 as well as the chromatic splitting conjecture at primes p > 3 [16]; we only need to use the

An Analytical Approach to the Analysis of

This paper presents an investigation into the mechanics of this specific problem and develops an analytical approach that accounts for the effects of geometrical and material data on

and universality in the matrix model

[Mag3] , Painlev´ e-type differential equations for the recurrence coefficients of semi- classical orthogonal polynomials, J. Zaslavsky , Asymptotic expansions of ratios of

On the Invariant Theory of the B´ ezoutiant

We study the classical invariant theory of the B´ ezoutiant R(A, B) of a pair of binary forms A, B.. We also describe a ‘generic reduc- tion formula’ which recovers B from R(A, B)

The Analysis of the Artifacts due to

While conducting an experiment regarding fetal move- ments as a result of Pulsed Wave Doppler (PWD) ultrasound, [8] we encountered the severe artifacts in the acquired image2.