Size-Dependent Geochemical Characteristics of Asian Dust : Sr and Nd Isotope Compositions as Tracers for Source Identification(<Special Issue>ADEC-Aeolian Dust Experiment on Climate Impact-)

スポンサーリンク

概要

• 論文の詳細を見る

• Aerosol samples, which are dust suspended in the atmosphere, were collected in Qira, Aksu, and Shapotou in 2001 and Qira, Dunhuang and Shapotou in 2002, which are located between north-western and central China, one of the possible source areas of Asian dust. Their chemical and isotopic compositions, mainly Sr and Nd isotopic compositions, in the total suspended particles (TSP) and finer fraction (φ<5μm) in the TSP were analysed. There is a slight difference in the chemical compositions of TSP and the φ<5μm fraction that can probably be attributed to the relative increase of silt and/or clay in the φ<5μm fraction. ^<87>Sr/^<86>Sr ratios were 0.71770-0.72030 in the TSP and 0.72349-0.72737 in the φ<5μm fraction over all sampling sites, although ε_<Nd>(0) values were relatively constant, from -11.3 to -9.3. The isotopic characteristics due to the variation of particle size are clearly seen in Rb-Sr and Sr-Nd isotopic correlation diagrams, which are useful aids to identify the sources of Asian dust. In addition to the possible isotopic change with particle size, results of Sr and Nd isotopic measurements suggest that the broad area from the north-western to the central part of China, i.e. from the Taklimakan Desert to the Central Loess Plateau, is characterized as a single possible source component of Asian dust. Clarifying the correlation between geochemical features and particle size is an important requirement that may allow the correlation of long-range transported Asian dust to possible source materials.

• 社団法人日本気象学会の論文
• 2005-03-31

著者

• YABUKI Sadayo

  The Institute of Physical and Chemical Research (RIKEN)

• SHEN Zhibao

  Cold and Arid Regions Environmental & Engineering Research Institute, CAS

• Shen Z

  Cold And Arid Regions Environmental And Engineering Res. Inst. Chinese Acadmy Of Sciences Lanzhou

• Yabuki S

  Inst. Physical And Chemical Res.(riken) Saitama Jpn

• Abe O

  Nagaoka Inst. Of Snow And Ice Studies National Res. Inst. For Earth Sci. And Disaster Prevention Shi

• KANAYAMA Shinji

  RIKEN (The Institute of Physical and Chemical Research)

• YABUKI Sadayo

  RIKEN (The Institute of Physical and Chemical Research)

• ZENG Fanjiang

  Xinjiang Institute of Ecology and Geography, Chinese Academy of Science

• LIU Mingzhe

  Xinjiang Institute of Ecology and Geography, Chinese Academy of Science

• LIU Lichao

  Cold and Arid Region's Environmental and Engineering Research Institute, Chinese Academy of Science

• YANAGISAWA Fumitaka

  Faculty of Science, Yamagata University

• ABE Osamu

  National Research Institute for Earth Science and Disaster Prevention

• KANAYAMA Shinji

  The Institute of Physical and Chemical Research (RIKEN)

• Liu Lichao

  Cold And Arid Regions Environmental And Engineering Research Institute Chinese Academy Of Sciences

• Liu Lichao

  Cold And Arid Region's Environmental And Engineering Research Inst.

• Liu Mingzhe

  Xinjiang Institute Of Ecology And Geography Cas.

• Zeng Fan

  Xinjiang Institute Of Ecology And Geography Chinese Academy Of Sciences

• Zeng Fanjiang

  Xinjiang Institute Of Ecology And Geography Cas.

• Zeng Fanjiang

  Xinjiang Institute Of Biology Pedology And Desert Research

• Shen Zhibao

  Cold And Arid Region's Environmental And Engineering Research Inst.

• Yanagisawa Fumitaka

  Yamagata University

• Liu Mingzhe

  Xinjiang Inst. Of Ecology Ancl Geography Chinese Acad. Of Sci.s Urumqi

• Yabuki Sadayo

  RIKEN (The Institute of Physical and Chemical Research

• Kanayama Shinji

  RIKEN (The Institute of Physical and Chemical Research

関連論文

• 風送ダストの気候への影響--日中共同プロジェクトADEC
• Measurements of Soil Water Content Using Time Domain Reflectometry Sensor and Water Vapor in Surface Soil at the Gobi Site in the Taklimakan Desert
• Size-Dependent Geochemical Characteristics of Asian Dust : Sr and Nd Isotope Compositions as Tracers for Source Identification(ADEC-Aeolian Dust Experiment on Climate Impact-)
• 2001年1月,3月に山形県で降った赤い雪中の黄砂粒子の地球化学的特徴及びSr同位体比による起源特定
• アジア大陸の砂漠地域上空のエアロゾル数密度-サイズ分布--中国敦煌で2001年夏と秋に行われた自由大気中での気球観測
• Sensitivity Experiments of Direct Radiative Forcing Caused by Mineral Dust Simulated with a Chemical Transport Model(ADEC-Aeolian Dust Experiment on Climate Impact-)
• The Characteristics of Atmospheric Aerosol at Aksu, an Asian Dust-Source Region of North-West China : A Summary of Observations over the Three Years from March 2001 to April 2004(ADEC-Aeolian Dust Experiment on Climate Impact-)
• Relationship between the Climate Change and Dust Storm Occurrence in China
• Dust Emission over Different Land Surface in the Arid Region of Northwest China
• Spectral Albedo of Desert Surfaces Measured in Western and Central China(ADEC-Aeolian Dust Experiment on Climate Impact-)
• 中国の風送ダスト発生域で採取したダスト粒子の粒子物性--日本の和光市で採取した都市型エアロゾルとの比較
• Aeolian Dust Transportation on Fine Days over the Slopes in Mountainous Areas around the Taklimakan Desert, China(ADEC-Aeolian Dust Experiment on Climate Impact-)
• Vertical Profiles of Aeolian Dust in a Desert Atmosphere Observed using Lidar in Shapotou, China(ADEC-Aeolian Dust Experiment on Climate Impact-)
• 沙坡頭上空風送ダストのライダー観測--2001年春季観測結果の予備解析
• Observation of Number Concentration of Desert Aerosols in the South of the Taklimakan Desert, China(ADEC-Aeolian Dust Experiment on Climate Impact-)
• Numerical Simulation of Mesoscale Circulations in the Tarim Basin Associated with Dust Events(ADEC-Aeolian Dust Experiment on Climate Impact-)
• Sr and Nd isotope ratios and REE abundances of moraines in the mountain areas surrounding the Taklimakan Desert, NW China
• Time Series Analyses of Dust Concentrations Measured at Dunhuang Gobi Desert Site: Analyses of Asymmetry Property of Dust Concentration Index
• Tillage Effects on Aeolian Dust Emission in Bare Agricultural Fields at Dunhuang, China
• HEIFE領域における砂漠とオアシス上の地表面放射収支
• 中国西北部におけるダストストームの特徴

もっと見る 閉じる

スポンサーリンク