Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2003JD004270 |
A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model | |
Mukai, M; Nakajima, T; Takemura, T | |
通讯作者 | Mukai, M |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
![]() |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2004 |
卷号 | 109期号:D19 |
英文摘要 | Dust events have been observed in Japan with high frequency since 2000. On the other hand, the frequency of dust storms is said to have decreased in the desert regions of China since about the middle of the 1970s. This study simulates dust storms and transportation of mineral dust aerosols in the east Asia region from 1981 to 2001 using an aerosol transport model, Spectral Radiation-Transport Model for Aerosol Species (SPRINTARS), implemented in the Center for Climate System Research/National Institute for Environmental Studies atmospheric global circulation model, in order to investigate the main factors that control a dust event and its long-term variation. The model was forced to simulate a real atmospheric condition by a nudging technique using European Centre for Medium-Range Weather Forecasts reanalysis data on wind velocities, temperature, specific humidity, soil wetness, and snow depth. From a comparison between the long-term change in the dust emission and model parameters, it is found that the wind speed near the surface level had a significant influence on the dust emission, and snow is also an important factor in the early spring dust emission. The simulated results suggested that dust emissions from northeast China have a great impact on dust mass concentration in downwind regions, such as the cities of northeastern China, Korea, and Japan. When the frequency of dust events was high in Japan, a low-pressure system tended to develop over the northeast China region that caused strong winds. From 2000 to 2001 the simulated dust emission flux decreased in the Taklimakan desert and the northwestern part of China, while it increased in the Gobi desert and the northeastern part of China. Consequently, dust particles seem to be transported more from the latter region by prevailing westerlies in the springtime to downwind areas as actually observed. In spite of the similarity, however, there is still a large disagreement between observed and simulated dust frequencies and concentrations. A more realistic land surface and uplift mechanism of dust particles should be modeled to improve the model simulation. Desertification of the northeastern China region may be another reason for this disagreement. |
英文关键词 | dust Asia aerosol |
类型 | Article |
语种 | 英语 |
国家 | Japan |
收录类别 | SCI-E |
WOS记录号 | WOS:000224430000002 |
WOS关键词 | CHINA ; SIMULATION ; TRANSPORT ; CLIMATE ; EROSION ; REGION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/147375 |
作者单位 | (1)Univ Tokyo, Ctr Climate Syst Res, Meguro Ku, Tokyo 1538904, Japan;(2)Kyushu Univ, Appl Mech Res Inst, Fukuoka 8168580, Japan |
推荐引用方式 GB/T 7714 | Mukai, M,Nakajima, T,Takemura, T. A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model[J],2004,109(D19). |
APA | Mukai, M,Nakajima, T,&Takemura, T.(2004).A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,109(D19). |
MLA | Mukai, M,et al."A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 109.D19(2004). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。