Supplement 1. Limnological and chemical data for surface water and bottom water from seven stations at Clear Lake over 22 potential sampling dates from May 1994 through May 1997.

File List limno-chem-data.txt -- ASCII file. Description The file limno-chem-data.txt contains limnological and chemical data for surface water and bottom water from 7 stations at Clear Lake over 22 potential sampling dates from May 1994 through May 1997. Data for each station include: temperature (°C), pH, specific conductivity (mS/cm), total dissolved solids (Km/L), dissolved oxygen (mg/L), turbidity (NTU), reduction/oxidation potential (mV), total organic carbon (mg/L), dissolved organic carbon (mg/L), humic acids (mg/L), total suspended solids (mg/L), sulfate (mg/L), total mercury - filtered water (ng/L), methyl mercury - unfiltered water (ng/L), methyl mercury - filtered water (ng/L). Minimum, maximum, and mean values for each parameter at each station/depth are provided at the bottom of each of the 14 data tables. Also included in the last column on each data table is a ROW SUM value (cumulative sum of values for each data row) to assis in QA/QC of downloaded data.

文件列表：limno-chem-data.txt——ASCII格式文件。
说明：本文件limno-chem-data.txt包含1994年5月至1997年5月期间，克利尔湖（Clear Lake）7个采样站位的表层水与底层水的湖沼学及化学数据，共涉及22个预设采样日期。各站位的监测数据涵盖：温度（℃）、pH值、比电导率（mS/cm）、总溶解固体（Km/L）、溶解氧（mg/L）、浊度（NTU）、氧化还原电位（mV）、总有机碳（mg/L）、溶解有机碳（mg/L）、腐殖酸（mg/L）、总悬浮固体（mg/L）、硫酸盐（mg/L）、过滤水中总汞（ng/L）、未过滤水中甲基汞（ng/L）、过滤水中甲基汞（ng/L）。
14个数据表的底部均给出了各站位/水层各参数的最小值、最大值与平均值。每个数据表的最后一列还设有行总和（ROW SUM）值，即单条数据行的数值累加和，用于辅助对下载数据开展质量保证与质量控制（QA/QC）工作。