3D structure of Asian dust transport revealed by CALIPSO lidar and a 4DVAR dust model

2008 ◽  
Vol 35 (6) ◽  
Author(s):  
I. Uno ◽  
K. Yumimoto ◽  
A. Shimizu ◽  
Y. Hara ◽  
N. Sugimoto ◽  
...  
Keyword(s):  
3D Structure ◽  
Asian Dust ◽  
Dust Transport

scholarly journals Comparison of Surface Observations and a Regional Dust Transport Model Assimilated with Lidar Network Data in Asian Dust Event of March 29 to April 2, 2007

SOLA ◽  
2011 ◽  
Vol 7A (Special_Edition) ◽  
pp. 13-16 ◽  
Author(s):  
Nobuo Sugimoto ◽  
Yukari Hara ◽  
Atsushi Shimizu ◽  
Keiya Yumimoto ◽  
Itsushi Uno ◽  
...  
Keyword(s):  
Transport Model ◽  
Asian Dust ◽  
Network Data ◽  
Dust Event ◽  
Dust Transport ◽  
Surface Observations

scholarly journals The impact of channel effect on Asian dust transport dynamics: a case in southeastern Asia

2012 ◽  
Vol 12 (1) ◽  
pp. 271-285 ◽  
Author(s):  
C.-Y. Lin ◽  
Y.-F. Sheng ◽  
W.-N. Chen ◽  
Z. Wang ◽  
C.-H. Kuo ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
High Resolution ◽  
Coupling Effect ◽  
Numerical Study ◽  
Average Concentration ◽  
Asian Dust ◽  
Dust Transport ◽  
Transport Dynamics ◽  
Channel Effect ◽  
The Impact

Abstract. A super heavy dust event was identified with unprecedented PM10 in terms of speed and concentration in the southeastern Asia. The average concentration was observed exceeding the value of 1000 μg m−3 for the duration lasting more than 10 h, with the highest value reached 1724 μg m−3 in northern Taiwan on 21 March 2010. We found that this case exhibited an uneven and intriguing spatial distribution of PM10 concentration and transport speed between eastern and western Taiwan. Higher values were observed in the western and northern areas. The peak concentrations can vary up to 5-fold between western and eastern Taiwan, and ten-fold between the northern tip and southern tip of Taiwan, only about 400 km apart. A high resolution, 10 km, numerical study by Weather Research Forecast (WRF) and WRF-chem models revealed that this intriguing spatial distribution of the Asian dust transport was resulting from a strong coupling effect of the geographic channel effect and blocking of the easterly from the Pacific Ocean. We are confident that this coupling effect can be revealed only by applying a high resolution numerical study in other similar regions.

Orbital- and millennial-scale variations in Asian dust transport path to the Japan Sea

2007 ◽  
Vol 247 (1-2) ◽  
pp. 144-161 ◽  
Author(s):  
Kana Nagashima ◽  
Ryuji Tada ◽  
Hiroyuki Matsui ◽  
Tomohisa Irino ◽  
Atsushi Tani ◽  
...  
Keyword(s):  
Japan Sea ◽  
Asian Dust ◽  
Dust Transport ◽  
The Japan Sea ◽  
Transport Path ◽  
Millennial Scale

scholarly journals Asian dust transport during the last century recorded in Lake Suigetsu sediments

2016 ◽  
Vol 43 (6) ◽  
pp. 2835-2842 ◽  
Author(s):  
Kana Nagashima ◽  
Yoshiaki Suzuki ◽  
Tomohisa Irino ◽  
Takeshi Nakagawa ◽  
Ryuji Tada ◽  
...  
Keyword(s):  
Asian Dust ◽  
Dust Transport

scholarly journals Glacial and Interglacial Patterns for Asian Dust Transport

PAGES news ◽  
1998 ◽  
Vol 6 (1) ◽  
pp. 10-10
Author(s):  
Xiao Y Zhang ◽  
ZS An ◽  
R Arimoto
Keyword(s):  
Asian Dust ◽  
Dust Transport

scholarly journals Identification of atmospheric transport and dispersion of Asian dust storms

2017 ◽  
Vol 17 (8) ◽  
pp. 1425-1435 ◽  
Author(s):  
Raegyung Ha ◽  
Amarjargal Baatar ◽  
Yongjae Yu
Keyword(s):  
Atmospheric Transport ◽  
Inverse Correlation ◽  
Asian Dust ◽  
Dust Storms ◽  
Occurrence Rate ◽  
Air Concentration ◽  
Dust Transport ◽  
Backward Trajectories ◽  
Transport Path ◽  
Threshold Time

Abstract. Backward trajectories of individual Asian dust storm (ADS) events were calculated using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) at four representative stations in Korea. A total of 743 ADS events and associated 2229 (endings of altitudes at 1000, 1500, and 2000 m per ADS event) backward trajectories from four stations were traced from January 2003 to August 2015. Regardless of the locations of the observed stations and the threshold time divide, a recent increase in the ADS occurrence rate was statistically significant with a 99.9 % confidence limit. Winter and spring were high-occurrence seasons for the ADS, while it rarely occurred in summer. Angular distributions of dust transport indicated a dominance of northwesterly wind, as more than two-thirds of ADS events are azimuthally confined from 290 to 340°. In addition, there is a tendency for stronger PM10 dust air concentration to be from the northwest. We found a strong inverse correlation between the number of days with ADS events and cumulative PM10 dust air concentration, indicating that the total amount of cumulative PM10 discharge was rather constant over time. If so, relatively shorter transport distances and a more continental dust passage over the Shandong peninsular would yield less PM10 in a shorter transport path but with a stronger concentration.

scholarly journals Large Asian dust layers continuously reached North America in April 2010

2011 ◽  
Vol 11 (14) ◽  
pp. 7333-7341 ◽  
Author(s):  
I. Uno ◽  
K. Eguchi ◽  
K. Yumimoto ◽  
Z. Liu ◽  
Y. Hara ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North America ◽  
Asian Dust ◽  
Northwestern China ◽  
Central Pacific ◽  
Pressure System ◽  
Near Surface ◽  
Dust Transport ◽  
Aerosol Model ◽  
Central Pacific Ocean

Abstract. The NASA space-borne Mie-lidar system CALIPSO/CALIOP revealed that multiple large Asian dust layers with a horizontal scale of 2000–3000 km reached North America, occupying the full troposphere, in April 2010. This kind of dust layer transport has not been reported before. Our analysis of CALIOP data and global aerosol model results revealed that frequent dust emissions occurred in northwestern China because of stronger-than-average near-surface winds, and that strong stable westerly winds carried the Asian dust from northwestern China to the central Pacific Ocean. A negative pressure anomaly was located in the eastern Pacific Ocean, and the main dust transport path was split into two branches: a northern path and a southern path over North America. Northern-path dust was trapped and stagnant for a longer time than southern path dust and finally subsided under a high-pressure system. Dust along the southern path reached the central US. These complex conditions resulted in a multi-layered structure of dust over North America.

scholarly journals Investigation of Three-Dimensional Evolution of East Asian Dust Storm by Modeling and Remote Sensing Measurements

2015 ◽  
Vol 2015 ◽  
pp. 1-12
Author(s):  
Jiawei Li ◽  
Zhiwei Han
Keyword(s):  
Dust Storm ◽  
East Asian ◽  
3D Structure ◽  
Three Dimensional ◽  
Asian Dust ◽  
East China ◽  
Gobi Desert ◽  
Air Quality Model ◽  
Quality Model ◽  
Asian Dust Storm

The three-dimensional evolution of an East Asian dust storm during 23–26 April 2009 was investigated by utilizing a regional air quality model system (RAQMS) and satellite measurements. This severe dust storm hit Mt. Tai in east China with daily mean PM10concentration reaching 1400 μg/m3and the model captured the PM10variation reasonably well. Modeled spatial distributions of AOD and vertical profiles of aerosol extinction coefficient during the dust storm were compared with MODIS and CALIPSO data, demonstrating that RAQMS was able to reproduce the 3D structure and the evolution of the dust storm reasonably well. During early days of the dust storm, daily mean dust-induced AOD exceeded 2.0 over dust source regions (the Gobi desert and the Taklamakan desert) and was in a range of 1.2–1.8 over the North China Plain, accounting for about 98% and up to 90% of total AOD over corresponding areas, respectively. The top of the dust storm reached about 8 km over east China, with high dust concentration locating at around 40°N. Dust aerosol below 2 km was transported southeastward off the Gobi desert while dust above 2 km was transported out of China along 40°–45°N.

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