Surface temperature, surface oxygen, water clarity, water chemistry and phytoplankton chlorophyll a data from Grasmere, 2014 to 2018

This is part of an ongoing long-term monitoring dataset of surface temperature, surface oxygen, water clarity, water chemistry and phytoplankton chlorophyll a from fortnightly sampling at Grasmere in Cumbria, England that began in 1968 for some variables. The data have been collected by the UK Centre for Ecology & Hydrology (UKCEH). The data available to download comprise surface temperature (TEMP) in degree Celsius, surface oxygen saturation (OXYG) in % air-saturation, Secchi depth (SECC) in metres, alkalinity (ALKA) in µg per litre as CaCO3 and pH. Ammonium (NH4N), nitrate (NO3N), soluble reactive phosphate (PO4P), total phosphorus (TOTP), dissolved reactive silicon expressed as SiO2 (SIO2) and phytoplankton chlorophyll a (TOCA) are all given in µg per litre. Measurements are made from a boat at a marked location (buoy) at the deepest part of the lake. When it was not possible to visit the buoy, samples were taken from the shore, thus water samples were not integrated on these occasions, marked as Flag 2. All data are from January 2014 until the end of March 2018. Unfortunately, due to funding shortages, the long-term monitoring of Grasmere ended in March 2018. This work was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability. Full details about this dataset can be found at https://doi.org/10.5285/86cce079-9410-4948-978a-1c92ff3d604c

此数据集构成了对英格兰库姆布里郡格拉瑟姆湖表面温度、表面氧气含量、水透明度、水质化学成分及浮游植物叶绿素a的长期监测的一部分，该监测始于1968年，部分变量至今仍在进行。数据由英国生态与水文中心（UKCEH）收集。可供下载的数据包括表面温度（TEMP，单位：摄氏度）、表面氧气饱和度（OXYG，单位：%空气饱和度）、塞奇深度（SECC，单位：米）、碱度（ALKA，单位：每升微克碳酸钙µg/L）及pH值。铵（NH4N）、硝酸盐（NO3N）、可溶性反应性磷酸盐（PO4P）、总磷（TOTP）、溶解性反应性硅（以SiO2表示，SIO2）及浮游植物叶绿素a（TOCA）均以每升微克（µg/L）为单位给出。测量是在湖中标记的浮标处进行的，该浮标位于湖底最深的位置。在无法访问浮标的情况下，样品从岸边采集，因此在这些场合，水样未进行整合，标记为标志2。所有数据均来自2014年1月至2018年3月底。遗憾的是，由于资金短缺，对格拉瑟姆湖的长期监测在2018年3月结束。该研究得到了自然环境研究委员会（Natural Environment Research Council）资助，资助编号为NE/R016429/1，作为英国-SCAPE计划的一部分，旨在提供国家能力。关于此数据集的详细信息可在以下链接找到：https://doi.org/10.5285/86cce079-9410-4948-978a-1c92ff3d604c