The 26th Chinese COMRA （China Ocean Mineral Resources Research ＆ Development Association） cruise was an important cruise. The Carlsberg Ridge （CR） of the Northwest Indian Ocean and the North Atlantic Ridge （NAR...The 26th Chinese COMRA （China Ocean Mineral Resources Research ＆ Development Association） cruise was an important cruise. The Carlsberg Ridge （CR） of the Northwest Indian Ocean and the North Atlantic Ridge （NAR）, in which less investigation has been carried out for hydrothermal activities, were investigated and studied during the first two legs of the 26th COMRA cruise. During the first leg, we found one hydrother- mal activity field located in the CR at 3.5^-3.8~ N on the Northwest Indian Ocean Ridge （NWIR）, and sampled seafloor polymetallic sulfide deposits where only abnormalities were found before. During the second leg, we found a new hydrothermal anomaly field located in the NAR at 4^-7~N. The discovery of two hydrother- real and anomaly fields filled in the gap of hydrothermal investigation and study in the corresponding re- ~ions for China.展开更多
The ionic compositions of aerosol samples collected during the 26th Chinese National Antarctic Research Expedition were analyzed and the sources of ions were distinguished. Cl-, Na＋, SO2-, NO3-, and Mg2＋ were the mo...The ionic compositions of aerosol samples collected during the 26th Chinese National Antarctic Research Expedition were analyzed and the sources of ions were distinguished. Cl-, Na＋, SO2-, NO3-, and Mg2＋ were the most abundant ionic components in the marine aerosols. Cl- and Na＋ contributed over 70% in the total ionic composition, indicating the sea salt is still the primary composition in marine aerosols, followed by the sulfate as the secondary ionic component existed as NH4N03, NH4HSO4, （NH4）2S04. The maximal sea salt concentrations were found at around 40~S and could be attributed to greater winds. The concentrations of methane sulfonic acid （MSA） appeared increasing trend from the low to high latitudes, possibly caused by lower temperature in air and higher marine biological processes in the marginal waters in Antarctica. The correlation and factor analyzes were used to investigate possible sources of these ions. Cl-, Br-, Na＋, K＋, Mg2＋ and Ca2＋ had predominantly marine sources; while F-, NO3 and NH＋ had mostly anthropogenic sources; MSA had marine biogenic sources. The concentrations of SO42- were influenced by both marine and anthropogenic sources.展开更多
对蒋丞稷100 m 蝶泳出发、途中游、转身、冲刺各阶段进行分析,并与国内外优秀选手比较显示,蒋丞稷出发反应时和出发15 m 技术达到世界先进水平;途中游划幅较大,划频较低;转身前7.5 m 较25～50 m 游速减慢0.03 m /s,这是其薄弱环节;终点...对蒋丞稷100 m 蝶泳出发、途中游、转身、冲刺各阶段进行分析,并与国内外优秀选手比较显示,蒋丞稷出发反应时和出发15 m 技术达到世界先进水平;途中游划幅较大,划频较低;转身前7.5 m 较25～50 m 游速减慢0.03 m /s,这是其薄弱环节;终点冲刺没有明显减速,但其冲刺前加速游能力还不如国内外优秀选手。展开更多
基金the National Basic Research Program of China under contract No. 2012CB417305China Ocean Mineral Resources Research & Development Association Project under contract No. DY125-11Endowment Fund of International Seabed Authority (the International Cooperative Study on Hydrothermal System at Ultraslow Spreading SWIR)
文摘The 26th Chinese COMRA （China Ocean Mineral Resources Research ＆ Development Association） cruise was an important cruise. The Carlsberg Ridge （CR） of the Northwest Indian Ocean and the North Atlantic Ridge （NAR）, in which less investigation has been carried out for hydrothermal activities, were investigated and studied during the first two legs of the 26th COMRA cruise. During the first leg, we found one hydrother- mal activity field located in the CR at 3.5^-3.8~ N on the Northwest Indian Ocean Ridge （NWIR）, and sampled seafloor polymetallic sulfide deposits where only abnormalities were found before. During the second leg, we found a new hydrothermal anomaly field located in the NAR at 4^-7~N. The discovery of two hydrother- real and anomaly fields filled in the gap of hydrothermal investigation and study in the corresponding re- ~ions for China.
基金supported by the National Natural Science Foundation of China (Grant no.40671062)the National High Technology Research Development Project (Grant no.2008AA121703)+2 种基金the Chinese International Cooperation Project from the Ministry of Science and Technology(Grant no.2009DFA22920)the Chinese International Cooperation Project from the Chinese Arctic and Antarctic Administration, SOA (Grant no.IC201114)the Special Fund for Marine Researches in the Public Interest(Grant no.201205013)
文摘The ionic compositions of aerosol samples collected during the 26th Chinese National Antarctic Research Expedition were analyzed and the sources of ions were distinguished. Cl-, Na＋, SO2-, NO3-, and Mg2＋ were the most abundant ionic components in the marine aerosols. Cl- and Na＋ contributed over 70% in the total ionic composition, indicating the sea salt is still the primary composition in marine aerosols, followed by the sulfate as the secondary ionic component existed as NH4N03, NH4HSO4, （NH4）2S04. The maximal sea salt concentrations were found at around 40~S and could be attributed to greater winds. The concentrations of methane sulfonic acid （MSA） appeared increasing trend from the low to high latitudes, possibly caused by lower temperature in air and higher marine biological processes in the marginal waters in Antarctica. The correlation and factor analyzes were used to investigate possible sources of these ions. Cl-, Br-, Na＋, K＋, Mg2＋ and Ca2＋ had predominantly marine sources; while F-, NO3 and NH＋ had mostly anthropogenic sources; MSA had marine biogenic sources. The concentrations of SO42- were influenced by both marine and anthropogenic sources.
文摘对蒋丞稷100 m 蝶泳出发、途中游、转身、冲刺各阶段进行分析,并与国内外优秀选手比较显示,蒋丞稷出发反应时和出发15 m 技术达到世界先进水平;途中游划幅较大,划频较低;转身前7.5 m 较25～50 m 游速减慢0.03 m /s,这是其薄弱环节;终点冲刺没有明显减速,但其冲刺前加速游能力还不如国内外优秀选手。
