scholarly journals Northeast Asian Dust Transport: A Case Study of a Dust Storm Event from 28 March to 2 April 2012

Atmosphere ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 69 ◽  
Author(s):  
Purevsuren Tsedendamba ◽  
Jugder Dulam ◽  
Kenji Baba ◽  
Katsuro Hagiwara ◽  
Jun Noda ◽  
...  
Keyword(s):  
Lower Layer ◽  
Northeast Asia ◽  
Source Area ◽  
Northern China ◽  
Storm Event ◽  
Dust Transport ◽  
Lidar Measurements ◽  
Dust Storm Event ◽  
Northeast Asian ◽  
The Vertical Distribution

The distribution and transport of windblown dust that occurred in Northeast Asia from 28 March to 2 April 2012 was investigated. Data of particulate matter less than 10 micrometers (PM10) near the surface and light detection and ranging (LiDAR) measurements from the ground up to 18 km were used in the study. A severe dust event originated over southern Mongolia and northern China on 28 March 2012, and the widespread dust moved from the source area southeastward toward Japan over several days. Windblown dust reached Japan after two days from the originating area. LiDAR measurements of the vertical distribution of the dust were one to two km thick in the lower layer of the atmosphere, and increased with the increasing distance from the source area.

scholarly journals Observations and transport modeling of dust storm event over Northeast Asia using HYSPLIT: case study

2019 ◽  
Vol 99 ◽  
pp. 02002
Author(s):  
Gantuya Ganbat ◽  
Dulam Jugder
Keyword(s):  
Dust Storm ◽  
Northeast Asia ◽  
Thick Layer ◽  
Northern China ◽  
Storm Event ◽  
Hysplit Model ◽  
Lidar Measurements ◽  
Dust Storm Event ◽  
High Concentrations ◽  
Dust Events

This study analyzes a regional dust storm event that occurred in spring 2016 using data from observation sites, Lidar measurements, and satellite imageries. PM10 concentrations at surface observation stations are considered as a primary indicator of the dust events. The dust events occurred on 3-12 March with PM10 reaching a maximum beyond 1682, 1498, 706, and 165 μg m−3 at observation sites in Mongolia, China, Korea and Japan, respectively. The dust event in Northeast Asia is captured by time series of PM10 concentrations at observation sites. On 3-4 March, the dust storm event originated from Mongolia move toward China, Korea and Japan. Vertical distributions of dust observed by Lidar measurements from stations in AD-Net capture a thick layer of nearly 2.2 km of high concentrations above surface in the area of origin. The maximum PM10 concentration drops with downwind transport. Dust source identification and dust-loaded air parcel trajectories are calculated using the HYSPLIT model. According to the HYSPLIT model, the dust storm started on 3-4 March from Mongolia and reached northern Japan in about 4 days passing over northern China and Korea.

scholarly journals Revealing the dust transport processes of the 2021 mega dust storm event in northern China

2021 ◽  
Author(s):  
Peng Liang ◽  
Bo Chen ◽  
Xiaoping Yang ◽  
Qianqian Liu ◽  
Airui Li ◽  
...  
Keyword(s):  
Dust Storm ◽  
Northern China ◽  
Transport Processes ◽  
Storm Event ◽  
Dust Transport ◽  
Dust Storm Event

scholarly journals Simulation of an Asian Dust Storm Event in May 2017

Atmosphere ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 135 ◽  
Author(s):  
Ping Song ◽  
Jianfang Fei ◽  
Changshun Li ◽  
Xiaogang Huang
Keyword(s):  
Size Distribution ◽  
Dust Storm ◽  
Source Region ◽  
Dust Emission ◽  
Northern China ◽  
Dust Particles ◽  
Storm Event ◽  
Dust Size Distribution ◽  
Dust Storm Event ◽  
Local Dust

Dust particles in the atmosphere play an important role in air pollution, climate change, and biogeochemical cycles. Some of the dominant sources of dust in mid-latitude regions are in Asia. An intense dust storm engulfed Northern China at the beginning of May 2017, and PM10 mass concentrations of 1500–2000 μg m−3 were measured near the dust source region. We combined numerical simulations, air quality monitoring data, and satellite retrievals to investigate dust emission and transport during this event. We found that the event was closely related to cold front activity, characterized by increased wind speed, which increased dust emission. We improved the dust scheme using a local dust size distribution to better simulate the dust emission flux. We found that accurate parametrization of the dust size distribution was important to effectively simulate both dust emission and ambient particle concentration. We showed that using a local dust size distribution substantially improved the accuracy of the simulation, allowing both the spatial distribution of pollution caused by the dust storm and temporal variability in the pollution to be captured.

scholarly journals Dust Transport from Inland Australia and Its Impact on Air Quality and Health on the Eastern Coast of Australia during the February 2019 Dust Storm

Atmosphere ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 141
Author(s):  
Emilie Aragnou ◽  
Sean Watt ◽  
Hiep Nguyen Duc ◽  
Cassandra Cheeseman ◽  
Matthew Riley ◽  
...  
Keyword(s):  
Air Quality ◽  
Dust Storm ◽  
New South ◽  
New South Wales ◽  
The State ◽  
Dust Storms ◽  
Eastern Coast ◽  
Storm Event ◽  
South Wales ◽  
Dust Storm Event

Dust storms originating from Central Australia and western New South Wales frequently cause high particle concentrations at many sites across New South Wales, both inland and along the coast. This study focussed on a dust storm event in February 2019 which affected air quality across the state as detected at many ambient monitoring stations in the Department of Planning, Industry and Environment (DPIE) air quality monitoring network. The WRF-Chem (Weather Research and Forecast Model—Chemistry) model is used to study the formation, dispersion and transport of dust across the state of New South Wales (NSW, Australia). Wildfires also happened in northern NSW at the same time of the dust storm in February 2019, and their emissions are taken into account in the WRF-Chem model by using Fire Inventory from NCAR (FINN) as emission input. The model performance is evaluated and is shown to predict fairly accurate the PM2.5 and PM10 concentration as compared to observation. The predicted PM2.5 concentration over New South Wales during 5 days from 11 to 15 February 2019 is then used to estimate the impact of the February 2019 dust storm event on three health endpoints, namely mortality, respiratory and cardiac disease hospitalisation rates. The results show that even though as the daily average of PM2.5 over some parts of the state, especially in western and north western NSW near the centre of the dust storm and wild fires, are very high (over 900 µg/m3), the population exposure is low due to the sparse population. Generally, the health impact is similar in order of magnitude to that caused by biomass burning events from wildfires or from hazardous reduction burnings (HRBs) near populous centres such as in Sydney in May 2016. One notable difference is the higher respiratory disease hospitalisation for this dust event (161) compared to the fire event (24).

Experiences in the Blue Economy Development of Northeast Asia Countries in the Context of Industrial Revolution 4.0 – Implication for Vietnam

2021 ◽  
Vol 12 (6) ◽  
pp. 2167-2175
Author(s):  
Dr. Pham Ngoc Tram Et al.
Keyword(s):  
Development Strategy ◽  
Industrial Revolution ◽  
Northeast Asia ◽  
National Development ◽  
Coastal Development ◽  
Asian Countries ◽  
Economic Sectors ◽  
Marine Economy ◽  
Global Concern ◽  
Northeast Asian

In the 21st century, in addition to the growing population and the depletion of land-based mineral and energy resources, the development of coastal economic sectors has become a new global concern.  Therefore, all marine countries in the world consider the development and use of marine resources an essential part of their national development strategy. The marine economy gradually stimulates competition among nations. This article is based on the synthesis of documents to learn and analyze experiences of coastal development in some Northeast Asian countries in the context of the Industrial Revolution 4.0. From there, draw reference lessons for Vietnam.

scholarly journals Study of the effect of different type of aerosols on UV-B radiation from measurements during EARLINET

2003 ◽  
Vol 3 (5) ◽  
pp. 4671-4700
Author(s):  
D. S. Balis ◽  
V. Amiridis ◽  
C. Zerefos ◽  
A. Kazantzidis ◽  
S. Kazadzis ◽  
...  
Keyword(s):  
Total Ozone ◽  
Single Scattering ◽  
Single Scattering Albedo ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Combined Use ◽  
Lidar Measurements ◽  
The Vertical Distribution ◽  
Aerosol Type

Abstract. Routine lidar measurements of the vertical distribution of the aerosol extinction coefficient and the extinction-to-backscatter ratio have been performed at Thessaloniki, Greece using a Raman lidar system in the frame of the EARLINET project since 2000. Spectral and broadband UV-B irradiance measurements, as well as total ozone observations, were available whenever lidar measurements were obtained. From the available measurements several cases could be identified that allowed the study of the effect of different types of aerosol on the levels of the UV-B solar irradiance at the Earth's surface. The TUV radiative transfer model has been used to simulate the irradiance measurements, using total ozone and the lidar aerosol data as input. From the comparison of the model results with the measured spectra the effective single scattering albedo was determined using an iterative procedure, which has been verified against results from the 1998 Lindenberg Aerosol Characterization Experiment. It is shown that the same aerosol optical depth and same total ozone values can show differences up to 10% in the UV-B irradiance at the Earth's surface, which can be attributed to differences in the aerosol type. It is shown that the combined use of the estimated single scattering albedo and the measured extinction-to-backscatter ratio leads to a better characterization of the aerosol type probed.

scholarly journals Distribusi Vertikal Logam Pb, Zn, Cr dan Keterkaitannya Terhadap Karbon Organik Sedimen di Pantai Marunda, Jakarta

2020 ◽  
Vol 9 (2) ◽  
pp. 125-132
Author(s):  
Triyanti Nurhidayah ◽  
Lilik Maslukah ◽  
Sri Yulina Wulandari ◽  
Kurnia Kurnia
Keyword(s):  
Heavy Metals ◽  
Vertical Distribution ◽  
Lower Layer ◽  
Middle Layer ◽  
Average Concentration ◽  
Anthropogenic Activity ◽  
Sediment Texture ◽  
The Relationship ◽  
The Vertical Distribution ◽  
Very High

Pantai Marunda terletak di Teluk Jakarta dan berdekatan dengan muara Sungai Tiram. Kegiatan antropogenik di sekitar Pantai Marunda sangat tinggi, sehingga dapat menyumbang limbah yang mengandung logam berat Pb, Zn dan Cr. Limbah logam berat yang terakumulasi dalam perairan, akan  mengendap dalam sedimen dan seiring berjalannya waktu akan mengalami peningkatan. Tujuan dari penelitian ini, untuk mengetahui konsentrasi Pb, Zn, dan Cr berdasarkan kedalaman vertikal, hubungannya dengan karbon organik total (KOT) dan ukuran butir sedimen di Pantai Marunda. Sampel sedimen diambil menggunakan polietylen sediment core dan dipisahkan berdasarkan kedalamannya (1-3 cm, 4-6 cm, dan 7-9 cm). Logam berat dalam sedimen dianalisis menggunakan metode destruksi asam dan diukur nilai absorbansinya menggunakan AAS, karbon organik total menggunakan metode loss of ignition (LOI) dan analisa tekstur sedimen dengan metode pengayakan dilanjutkan pemipetan. Hasil menunjukkan bahwa konsentrasi rerata logam berat Pb, Zn, Cr secara berurutan pada lapisan atas sebesar 5,14; 107,19; dan 12,79 ppm, lapisan tengah sebesar 4,41; 100,20; 12,28  ppm serta lapisan bawah sebesar 4,8; 101,30; 14,10 ppm. Logam berat Zn dan Cr berkorelasi positif kuat terhadap KOT dan persentase lumpur, sedangkan terhadap Pb berkorelasi negatif. Hasil penelitian ini menggambarkan bahwa distribusi logam berat Pb, Zn dan Cr secara vertikal menunjukkan konsentrasi tinggi pada lapisan permukaan yaitu pada kedalaman sedimen 1-3 cm dan keberadaanya ditentukan oleh konsesntrasi  KOT dan fraksi sedimen jenis lumpur. The Marunda Beach is located on the Jakarta Bay and adjacent to the mouth of the Tiram River. Anthropogenic activity around Marunda Beach is very high, so it can contribute the heavy metals such as Pb, Zn and Cr. The heavy metal will accumulate in the sediment and over time will be increase. The purpose of this study was to determine the vertical distribution of Pb, Zn, Cr, and their relationship to total organic carbon (TOC) and the grain size. Sediment samples were taken using polyethylene cores and this sample separated based on their depth (1-3 cm, 4-6 cm, and 7-9 cm). The heavy metals were analyzed using acid destruction and absorbance values were measured using AAS, TOC using the loss of ignition (LOI) and sediment texture with a sifting method, followed by pipetting. The results showed that the average concentration of Pb, Zn, Cr in the upper layer was 5.14; 107.19; 12.79 ppm, in the middle layer of 4.41; 100.20; 12.28 ppm and in the lower layer 4.8; 101.30; 14.10 ppm, respectively. Zn and Cr are strongly positively correlated to TOC and mud, and vice versa, the relationship to Pb is negative. The results of this study found that the vertical distribution of Pb, Zn and Cr was high in the surface layer (1-3 cm) and their presence was determined by TOC concentration and mud fraction.

Language dispersals and the “Secondary Peoples’ Revolution”

2020 ◽  
pp. 806-814
Author(s):  
Mark James Hudson
Keyword(s):  
Bronze Age ◽  
Northeast Asia ◽  
Ryukyu Islands ◽  
State Control ◽  
Hunter Gatherers ◽  
Population Movements ◽  
The Ryukyu Islands ◽  
Northeast Asian ◽  
Cattle Husbandry ◽  
The Bronze Age

Population growth and demic diffusion help explain the early Neolithic expansions of agriculture and Transeurasian languages in Northeast Asia. By the Bronze Age, alluvial agrarian states had come to possess considerable political and economic dominance over their subjects in the civilizational centers of Eurasia. At the same time, however, Bronze Age economies offered new opportunities for trade and secondary expansion into areas outside state control. This chapter argues that the resulting population movements—here termed the “secondary peoples’ revolution”—were of great significance in the post-Neolithic dispersals of Transeurasian languages. Four examples are briefly discussed: steppe nomadic pastoralism, Sakha horse and cattle husbandry, northeast Asian hunter-gatherers, and agriculture associated with trade/piracy networks in the Ryukyu Islands.

Substantive Provisions of the East Asian Trilateral Investment Agreement and their Implications

2019 ◽  
pp. 222-242
Author(s):  
Won-Mog Choi
Keyword(s):  
Host Country ◽  
Dispute Settlement ◽  
East Asian ◽  
Northeast Asia ◽  
International Investment ◽  
Investment Climate ◽  
Investment Promotion ◽  
Investment Agreement ◽  
Northeast Asian ◽  
Regulatory Actions

The Korea–China–Japan Investment Promotion, Facilitation and Protection Agreement is the first treaty in the economic field that binds the three Northeast Asian countries together under a single legal instrument. The existence of effective dispute settlement procedures under the treaty will contribute to the creation of a favourable investment climate in the host country. Nevertheless, there have been fears about frivolous or vexatious claims that could inhibit legitimate regulatory actions by governments. How to compose an investment chapter of the Korea–China–Japan FTA that is being negotiated is a pressing demand for all in the region. Any pertinent answers to such a quest require a thorough comparison of the benefits and drawbacks of any development of relevant rules and governance. In the end, a quest for better international investment governance in Northeast Asia in the future requires sound evaluation of lessons from the past and present.

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