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1.
Distribution of Pacific-origin water in the region of the Chukchi Plateau in the Arctic Ocean in the summer of 2003 总被引：6，自引：1，他引：6
1Introduction Besidestheprecipitationandriverdischarges,the watersinthePacificOceanandtheAtlanticOceanare thesourcesoftheArcticOceanwater.TheAtlantic waterenterstheArcticOceanviatheFramStraitand theBarentsSea.Foritsdenserfeatureduetohigh salinity,mostofitsinkstothenorthofSvaldbardand circulatesinallthedeepbasinsintheArcticOcean, formingthedeepandbottomwatersoftheArcticO- cean(Aagaardetal.,1985;Rudelsetal.,1999).The BeringStraitistheonlychannelforthePacificwater toflowintotheArcticOce… 相似文献
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长江口外高盐水入侵分析 总被引：10，自引：0，他引：10
本文根据１９７５～１９８２，１９８７～１９９０年东海海洋调查、１９８２～１９８３年上海市海岸带海洋水文调查和１９８８～１９８９年长江口河口锋调查资料，分析了高盐水入侵长江口外的特征和规律，结果表明，高盐水入侵边界的多年平均位置与长江水下三角洲的东边界大致一致，入侵长江口外的高盐水主要源于台湾暖水，冬季尚有黄海混合水入侵的迹象。文中还探讨了高盐水的入侵机理，并阐述了高盐水入侵对入海泥沙输移和长江水下三角洲的发育起着控制作用。 相似文献
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Interaction of the Kuroshio water and shelf waterin the Tsushima Current region in summer 总被引：2，自引：0，他引：2
ＩｎｔｅｒａｃｔｉｏｎｏｆｔｈｅＫｕｒｏｓｈｉｏｗａｔｅｒａｎｄｓｈｅｌｆｗａｔｅｒｉｎｔｈｅＴｓｕｓｈｉｍａＣｕｒｒｅｎｔｒｅｇｉｏｎｉｎｓｕｍｍｅｒＧｕｏＢｉｎｇｈｕｏ,１Ｈｅｕｎｇ－ＪａｅＬｉｅ２ａｎｄＪａｅＨａｋＬｅｅ２（ＲｅｃｅｉｖｅｄＳｅ... 相似文献
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Concentrations of microbial ATP in 15 New Zealand lakes were determined using 2 extraction techniques. ATP was found in both the paniculate (>0.45 μm) and dissolved (<0.45 μm) fractions of the water samples. Higher concentrations of paniculate ATP were obtained when ATP was extracted directly from freshwater samples rather than following pre‐concentration on to membrane filters. Recovery of particulate ATP declined with increasing volumes of sample filtered. The magnitude of the filtration effect varied unpredictably between lakes and within lakes with time. Corrections for the presence of dissolved ATP were necessary before estimates of particulate ATP could be made by the direct extraction technique. Concentrations of dissolved ATP up to 1.2 μg L‐1 were observed. The direct extraction technique is recommended for more accurate determination of particulate ATP in New Zealand freshwaters. 相似文献
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白沙河平原区为青岛市蔬菜基地，农业为主要用水户，根据本区未来菜粮比例进一步提高、城乡生活水平不断提高、乡镇工业迅速发展、节水意识有所提高等特点．设计了包括工业、农业和生活需水的需水预测模型，预测结果表明，工业及生活用水比例将不断提高，农业用水仍占主要地位，但增幅不大。预测结果为管理模型设计提供了信息． 相似文献
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巴士海峡水文特征的差异分析 总被引：3，自引：0，他引：3
利用1965～1967年黑潮联合调查（CSK）温盐资料分析巴士海峡的水文特征，结果表明：海峡两侧的水文特征存在明显差异，其东侧的太平洋水具有高温高盐特征；西坝的南海水为高温低盐。依据200m层等温线的分布趋势，黑潮水只出现在该海区约120°～121°E以东海域而没有向西扩展，16℃等温线可视为该海区黑潮西边界的概略位置。在海峡500m以线的北端是以太平洋水进入南海；南端在约20°30′N以南是南海水流入太平洋。文中对各种差异的原因进行了讨论。 相似文献
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提出用Ｂ样条函数方法求解咸、淡水分界面的原理、方法和步骤，指出该方法原理简明、易于实现、计算可靠。作为实例，将此方法应用于莱州市滨海地区。 相似文献
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平原水网地区湖泊的水环境容量及允许负荷量 总被引：4，自引：0，他引：4
本文从平原水网地区的湖泊具体特征出发,探讨了平原水网地区的湖泊水面允许负荷量和水环境容量的计算方法,并对我国著名的淡水湖太湖进行了计算,为太湖的水质规划和保护提供了科学的依据。 相似文献
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Long-term variability in the intermediate layer of the eastern Japan Basin has been investigated to understand the variability
of water mass formation in the East Sea. The simultaneous decrease of temperature at shallower depths and oxygen increasing
at deeper depths in the intermediate layer took place in the late 1960’s and the mid-1980’s. Records of winter sea surface
temperatures and air temperatures showed that there were cold winters that persisted for several years during those periods.
Therefore, it was assumed that a large amount of newly-formed water was supplied to the intermediate layer during those cold
winters. Close analysis suggests that the formation of the Upper Portion of Proper Water occurred in the late 1960’s and the
Central Water in the mid-1980’s. 相似文献
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本文根据１９８８年１０月２０～２４日“向阳红０９号”调查船在奄美大岛以西海区进行调查时，在陆架斜坡上的表均温层的底部，即５０ｍ附近的深层上，出现一个黑潮锋面涡。不论在平面上形成的特点，还是在断面上水系配置的形式，它与春季黑潮锋面涡的特征极为相似。说明秋季东海同样存在陆架水与黑潮水在水平方向交换与混合。 相似文献
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Study on interaction between the coastal water, shelf water and Kuroshio water in the Huanghai Sea and East China Sea 总被引：3，自引：3，他引：3
The main processes of interaction between the coastal water, shelf water and Kuroshiowater in the Huanghai Sea (HS) and East China Sea (ECS) are analyzed based on the observation and study results in recent years. These processes include the intrusion of the Kuroshio water into the shelf area of the ECS, the entrainment of the shelf water into the Kuroshio, the seasonal process in the southern shelf area of the ECS controlled alternatively by the Taiwan Strait water and the Kuroshio water intruding into the shelf area, the interaction between the Kuroshio branch water, shelf mixed water and modified coastal water in the northeastern ECS, the water-exchange between the HS and ECS and the spread of the Changjiang diluted water. 相似文献
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Kathleen Agosta 《Estuarine, Coastal and Shelf Science》1985,21(3):389-400
Water moved into the creekbank sediments in direct response to the changing levels of the water table caused by the tides. The net water loss of the sediments was 3–30% on each low tide and this loss was confined to within 4 m (horizontal) of the creek. The replacement of this water by incoming tidal water could not supply sufficient nutrients for the growth of creekbank Spartina. However, during ebb tide there was a replacement of water in the creekbanks with nutrient-rich water from the marsh interior as demonstrated by the large changes in pore water chemistry over a tidal cycle. The concentration and the range of a chemical parameter depended upon the stage of the tide, the tidal range, the time of year and (for salinity) the rainfall patterns of the month preceding sampling. Over a single tidal cycle the maximum ranges were: salinity ‰, 26–33; alkalinity, 2·5–13·6 med 1?1, ammonia, 2–400 μm, sulfate, 23·5–29 mmol 1?1. Measurable concentrations of sulfide were only found in a few samples. This high nutrient water can supply nitrogen and probably other nutrients to Spartina. 相似文献
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The circulation of intermediate and deep waters in the Philippine Sea west of the Izu-Ogasawara-Mariana-Yap Ridge is estimated
with use of an inverse model applied to the World Ocean Circulation Experiment (WOCE) Hydrographic Program data set. Above
1500 m depth, the subtropical gyre is dominant, but the circulation is split in small cells below the thermocline, causing
multiple zonal inflows of intermediate waters toward the western boundary. The inflows along 20°N and 26°N carry the North
Pacific Intermediate Water (NPIW) of 11 × 109 kg s−1 in total, at the density range of 26.5σθ–36.7σ2 (approximately 500–1500 m depths), 8 × 109 kg s−1 of the NPIW circulate within the subtropical gyre, whereas the rest is conveyed to the tropics and the South China Sea. The
inflow south of 15°N carries the Tropical Salinity Minimum water of 35 × 109 kg s−1, nearly half of which return to the east through a narrow undercurrent at 15–17°N, and the rest is transported into the lower
part of the North Equatorial Countercurrent. Below 1500 m depth, the deep circulation regime is anti-cyclonic. At the density
range of 36.7σ2, – 45.845σ4 (approximately 1500–3500 m depths), deep waters of 17 × 109 kg s−1 flow northward, and three quarters of them return to the east at 16–24°N. The remainder flows further north of 24°N, then
turns eastward out of the Philippine Sea, together with a small amount of subarctic-origin North Pacific Deep Water (NPDW)
which enters the Philippine Sea through the gap between the Izu Ridge and Ogasawara Ridge. The full-depth structure and transportation
of the Kuroshio in total and net are also examined. It is suggested that low potential vorticity of the Subtropical Mode Water
is useful for distinguishing the net Kuroshio flow from recirculation flows.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
19.
厦门海域水体中有机锡的存在形态与含量分布 总被引：1，自引：0，他引：1
利用固相萃取-气相色谱-火焰光度检测(SPE-GC-FPD)对厦门海域表、底层海水中的有机锡化合物进行了分析检测。其中表层海水中检出的有机锡化合物以二丁基锡(DBT)为主,底层海水中以三丁基锡(TBT)为主,且TBT的浓度显著高于表层水。表层海水中总有机锡浓度在129.1—4 826.8 ng(Sn).L-1之间,底层海水则分布在321.6—1 954.5ng(Sn).L-1之间。结果显示,厦门港内及同安湾附近海域水体中的有机锡浓度远高于九龙江口及厦门西南海域,这与厦门海域船舶活动和网箱养殖密切相关。通过对鼓浪屿站点表层海水中有机锡化合物15 h的连续监测,推测光照对水体中有机锡的降解影响显著。 相似文献
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在野外实验取得了的大量数据的基础上,计算了地下水的给向弥散系数和平均流速,并用二维连续污染方程预测了西小漳垃圾场垃圾渗漏水对地下的影响,在沿着水流方向,最大的影响范围为６５ｍ,在垂直方向上,影响范围为３０ｍ。 相似文献