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）已经获得并维护了50年来世界标志性湖泊之一太浩湖的长期生态变化记录。位于加州和内华达州的内华达山脉，这是一个已经经历并预计将继续经历土地利用变化、引进物种变化和气候变化的巨大影响的地区。两个设备项目，分光光度计和分析水质传感器包，允许这个不间断的数据记录的延续，允许新一代光学传感器的校准，并有助于分析和理解的原因和变化的后果。分光光度计具有独特的能力，能够在内华达山脉湖泊的典型超清水中使用，将为干旱西部水生生态系统的研究提供区域资产。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。TERC在太浩盆地的两个公共教育中心将这些数据用于展览和学习项目的开发，确保科学投资被用于教育和激励学生和公众对科学、生态系统管理和我们受到威胁的淡水资源的认识。有关研究、监测和教育计划的详细信息可在terc.ucdavis.edu上找到。使用这两种设备的主要目的是通过使用新仪器进行稳定和准确的测量，来维持和扩展太浩湖的长期生态系统记录。其次，该设备可广泛用于内华达山脉和该地区的其他湖泊。该仪器是理想的使用范围广泛的清澈，低浓度内华达山脉湖泊。长径长度分光光度计允许通过高精度彩色溶解有机物（CDOM）校准现场样品的光谱响应来探索新的研究领域。分析水质传感器包（海鸟CTD）可以全年在多个湖泊进行分析。这些仪器将允许扩大对CDOM和高山湖泊密度分层影响的研究。目前的研究正在强调CDOM在水生生态系统中作为变化指标和变化驱动因素的作用。目前迫切需要CDOM数据来校准研究未来100年全球变化对生态系统健康潜在影响的模型。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/.