Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 8711324 |
| China and America Air/Sea Experiments | |
| Richard Arimoto | |
| 主持机构 | University of Rhode Island |
| 开始日期 | 1987-09-01 |
| 结束日期 | 1991-08-31 |
| 资助经费 | 300000(USD) |
| 项目类别 | Continuing Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | ATMOSPHERIC CHEMISTRY |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | There is growing awareness that atmospheric transport delivers geochemically significant quantities of trace substances to the remote atmosphere and to inland waters, coastal waters of various regions and the open ocean. Interest in the atmospheric transport and deposition of trace substances has increased significantly in the past 10 to 20 years in part because this pathway is now recognized as an important means for dispersing chemical contaminants throughout the environment. The natural biogeochemical cycles of a variety of trace substances have, in fact, been altered by air pollutants in various regions, but the composition of gases and particles in the atmosphere of the People's Republic of China is unique. This uniqueness is a result of material derived from anthropogenic sources as well as those from naturally occurring sources. The major source of air pollutants in China is the combustion of coal and intense agricultural development in China. Naturally occurring trace substances, including mineral dust particles, are important components of the atmosphere, and chemical reactions between naturally occurring and anthropogenic materials are now known to be important. High concentrations of atmospheric dust occur in China during the spring and early summer due to the eolian transport of mineral particles from arid regions in central and western China. Understanding the chemistry, atmospheric transport, and air/sea exchange of Asia dust is an important biogeochemical research issue. The objectives for the cooperative atmospheric and ocean science studies between the U.S. and China are: (1) to characterize the chemical composition of aerosol particles and rainwater from Asian and determine the areal and temporal variability in the concentrations of mineral aerosol, trace elements, nitrate, phosphate, and sulfate; (2) to determine the integrated atmospheric deposition rates of these substances to coastal waters; (3) to evaluate the extent to which anthropogenic emissions from China, particularly those that result from the combustion of coal, affect the chemistry of the atmosphere and waters of the western North Pacific; and (4) to identify probable source areas for mineral dust through meteorological analyses. The concentrations of selected trace elements (Al, As, Br, Ca, Cd, Cl, Co, Cr, Cu, Fe, I, Mn, Na, Pb, Sb, Sc, Se, Sn, Th, V, and Zn) will be determined in aerosol particle samples and atmospheric deposition samples from the near surface troposphere at three sites along the coast of the People's Republic of China (PRC) and at one site in the Central Loess Plateau in China. The concentrations of sulfate, nitrate, and phosphate also will be determined in aliquots of the samples by scientists from China and verified by analyses in the U.S. |
| 来源学科分类 | Geosciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711324 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/342019 |
| 推荐引用方式 GB/T 7714 | Richard Arimoto.China and America Air/Sea Experiments.1987. |
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