• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2006 IEEE US/EU Baltic International Symposium >In situ and remote monitoring of water quality in Puget Sound: The ORCA time-series
【24h】

In situ and remote monitoring of water quality in Puget Sound: The ORCA time-series

机译：普吉特海湾水质的原位和远程监测：ORCA时间序列

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High frequency hydrological and meteorological measurements have been made in Puget Sound from 2001 to the present using remote profiling moorings. The moorings consists of a toroidal float upon which is mounted an electric winch that is powered by solar panels. Meteorological variables include, wind velocity and direction, air temperature, barometric pressure, and incident solar radiation while hydrographic variables include water temperature, salinity, dissolved oxygen, chlorophyll fluorescence and nitrate. Currently three moorings are operating in Puget Sound. All hydrographic variables displayed high frequency variability at all locations in Puget Sound, likely due to tidally advecting, patchy distributions. In the main basin of Puget Sound, the water column was well mixed during the winter months and water temperature was warmer than air temperature. With the onset of spring conditions plankton (fluorescence) bloomed and oxygen became supersaturated. However, there were numerous and frequent periods of destratification that could be correlated with wind events which mixed chlorophyll-containing surface waters downwards and nutrient-rich, oxygen-undersaturated water upwards. This process enhanced export production and injected oxygen into the deep waters. The chlorophyll maximum was found in the surface waters during the spring and fall bloom periods, but was located in the pycnocline during the summer months. By pooling all the oxygen data by hour of the day a diurnal oxygen curve was determined. The diurnal oxygen cycle was approximately sinusoidal with the minimum slightly before dawn and the maximum about at about 1800h and the amplitude was 17m moles of oxygen per liter. Primary production estimates derived from the oxygen cycle agreed with those determined from classical 14-C incubation methods. Statistical analysis of the data revealed that, at a minimum, daily sampling is necessary to assess the true values of the many measured variables. Without this s- mpling frequency resolving interannual differences or climate related changes would be difficult. However, given daily or greater sampling it should be possible to determine these types of changes as well as overall trends and cycles.
机译：从2001年到现在，普吉特海湾使用远程剖面系泊设备进行了高频水文和气象测量。系泊系统由一个环形浮子组成，在其上安装了由太阳能电池板供电的电动绞盘。气象变量包括风速和风向，气温，大气压力和太阳辐射，而水文变量包括水温，盐度，溶解氧，叶绿素荧光和硝酸盐。目前，普吉特海湾有3个系泊设施。所有水文变量在普吉特海湾的所有位置均表现出高频变化，这可能是由于潮汐平缓的，零散的分布所致。在普吉特海湾的主要盆地，冬季的水柱混合良好，水温高于气温。随着春季的到来，浮游生物（荧光）开始开花，氧气变得过饱和。但是，有许多频繁的分层过程与风事件有关，风事件将含叶绿素的地表水向下混合，而营养丰富的，氧不足的水向上混合。此过程提高了出口产量，并向深水注入了氧气。叶绿素最大值在春季和秋季开花期的地表水中发现，但在夏季月份位于比浓可可碱中。通过收集一天中所有小时的氧气数据，确定了每日氧气曲线。昼夜氧气循环近似正弦曲线，最小的是黎明前的最小，最大的大约是在1800h，振幅为每升17m摩尔的氧气。从氧气循环得出的初步产量估算值与经典14-C孵育方法得出的估算值相符。数据的统计分析表明，至少每天必须采样以评估许多测量变量的真实值。没有这种简单的频率解决年际差异或与气候相关的变化将是困难的。但是，在每天或更多次采样的情况下，应该有可能确定这些类型的变化以及总体趋势和周期。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号