SPECTROPHOTOMETER AND PROFILER FOR TERC FIELD STATION AND LABORATORY, LAKE TAHOE

加州大学戴维斯分校太浩湖环境研究中心（TERC）获得并保持了世界标志性湖泊之一太浩湖50年的长期生态变化记录。该地区位于加州州和内华达州的Sierra内华达州山脉，由于土地使用变化、引入物种变化和气候变化，该地区已经经历并预计将继续经历巨大的影响。这两个设备项目，分光光度计和水质分析传感器包，使这一完整的数据记录得以延续，使新一代光学传感器得以校准，并有助于分析和了解变化的原因和后果。分光光度计，独特的能够在超清澈的水典型的塞拉利昂内华达州湖泊使用，将提供一个区域资产的研究在干旱的西部水生生态系统。长期的、可公开访问的数据库继续被获取和存档，为科学家、决策者和公众提供了不可替代的资源。在太浩河流域TERC的两个公共教育中心的展览和学习计划的开发中使用这些数据，确保了对科学的投资被用来教育和激励学童和公众了解科学，生态系统管理和我们受到威胁的淡水资源。研究、监测和教育项目的详细信息可在terc.ucdavis.edu上查阅。使用这两种设备的主要目标是通过允许使用新仪器进行稳定和准确的测量来维持和延长太浩湖的长期生态系统记录。其次，该设备可用于内华达州和该地区其他湖泊的广泛范围。这些仪器非常适合在大范围的清澈、低浓度Sierra内华达州湖泊中使用。长光程分光光度计允许新的研究领域进行探索，通过高精度彩色溶解有机物（CDOM）校准现场样品的光谱响应。分析水质传感器包（Seabird CTD）可在多个湖泊中保持全年分析。这些仪器将允许扩大对高山湖泊中CDOM和密度分层影响的研究。目前的研究突出了CDOM作为水生生态系统变化指标和变化驱动力的作用。迫切需要CDOM数据来校准调查未来100年全球变化对生态系统健康的潜在影响的模型。 有关TERC的更多信息，请访问网站http://terc.ucdavis.edu/。

The UC Davis Tahoe Environmental Research Center (TERC) has acquired and maintained a 50-year record of long-term ecological change in one of the world's iconic lakes, Lake Tahoe. Located in the Sierra Nevada mountains of California and Nevada, this is an area that has experienced, and is predicted to continue experiencing, great impacts on account of land use change, introduced species change and climate change. The two equipment items, a spectrophotometer and a profiling water quality sensor package, allow for the continuation of this unbroken data record, permit the calibration of a new generation of optical sensors, and help in the analysis and understanding of the causes and the consequences of change. The spectrophotometer, uniquely capable of use in ultra-clear water typical of Sierra Nevada lakes, will provide a regional asset for the study of aquatic ecosystems in the arid west. The long-term, publicly accessible database that continues to be acquired and archived provides an irreplaceable resource for scientists, policy makers, and the general public. The use of the data in the development of exhibits and learning programs at TERC's two public education centers in the Tahoe basin ensures that investments in science are being used to both educate and inspire school children and the general public about science, ecosystem stewardship and our threatened freshwater resources. Details of the research, monitoring and educational programs are available at terc.ucdavis.edu.The primary goal for the use of both items of equipment is to maintain and extend the long-term ecosystem record for Lake Tahoe by allowing for stable and accurate measurements to be taken with new instruments. Secondarily, the equipment can be used in a broad range of Sierra Nevada and other lakes in the region. The instruments are ideal for use in a broad range of clear, low concentration Sierra Nevada lakes. The long path-length spectrophotometer permits new areas of research to be explored through high accuracy Colored Dissolved Organic Matter (CDOM) calibrations from the spectral response of field samples. The profiling water quality sensor package (Seabird CTD) enables year-round profiling to be maintained in multiple lakes. The instruments will permit an expansion of research on CDOM and density stratification impacts in high mountain lakes. Current research is highlighting the role of CDOM both as an indicator of change and as a driver of change in aquatic ecosystems. CDOM data are urgently needed to calibrate models investigating the potential impacts of global change on ecosystem health in the next 100 years. For more information about TERC, visit the website at http://terc.ucdavis.edu/.