Catchment-scale aquatic C emissions

The csv file "Daily_aquatic_lateral_C_emissions_SRC" contains the daily data of - Stream discharge (missing data linearly interpolated) in L/s - DOC load (with interpolated DOC concentrations, see main text) in mg C/s - DIC load (with interpolated DIC concentrations, see main text) in mg C/s - DOC export in Mg C/d (1 Mg = 10^6 g) - DIC export in Mg C/d (1 Mg = 10^6 g) The file includes data for days excluding freezing temperatures. NA indicates no data - during these days the lakes were covered with ice and the streams were frozen with little or no flowing water. NA days differed between lakes and streams as the lakes were covered with ice for longer time. The csv file "Daily_aquatic_vertical_C_emissions_SRC" contains the daily data of - Mean total CH4 emissions in the three lakes in SRC (ebullition+diffusive flux; see main text) in mmol/m2/d - Mean CO2 emissions in the three lakes in SRC in mmol/m2/d - Lake C emissions, from the three lakes in SRC in Mg C/d (1 Mg = 10^6 g) - Mean CH4 emissions in the streams of SRC in mmol/m2/d - Mean CO2 emissions in the streams of SRC in mmol/m2/d - Stream C emissions from the stream network of SRC in Mg C/d (1 Mg = 10^6 g) The file includes data for days excluding freezing temperatures. NA indicates no data - during these days the lakes were covered with ice and the streams were frozen with little or no flowing water. NA days differed between lakes and streams as the lakes were covered with ice for longer time. The csv file "Stream_DIC_concentrations" contains DIC concentrations measured in the station near the outlet of SRC, in µM. The file includes the dates when the measurements were made and other dates were omitted. The csv file "Stream_DOC_concentrations" contains DOC concentrations measured in the station near the outlet of SRC, in mg/L. Multiple measurements were made in some days, and those are individual samples and not replicates. The file includes the dates when the measurements were made and other dates were omitted. The csv file "Stream_gas_concentrations_k_SRC" contains mean values of the following (mean of all the measurements in the different stream reaches in SRC for the given day). - measured pCO2 in µatm - measured CH4 concentrations in µM - modelled k values in m/d NA indicates no data. See main text for details. The dataset was originally published in DiVA and moved to SND in 2024.csv文件"Daily_aquatic_lateral_C_emissions_SRC"包含以下每日数据集： - 溪流流量（缺失数据采用线性插值法补充），单位：升每秒（L/s） - 溶解有机碳（Dissolved Organic Carbon, DOC）负荷（溶解有机碳浓度经插值处理，详见正文），单位：毫克碳每秒（mg C/s） - 溶解无机碳（Dissolved Inorganic Carbon, DIC）负荷（溶解无机碳浓度经插值处理，详见正文），单位：毫克碳每秒（mg C/s） - 溶解有机碳输出量，单位：兆克碳每天（Mg C/d，1 Mg = 10^6 克） - 溶解无机碳输出量，单位：兆克碳每天（Mg C/d，1 Mg = 10^6 克） 该文件收录了非冰冻期的日度数据。NA代表无有效数据——此类日期中湖泊被冰盖覆盖，溪流封冻，几乎无或完全无水流。不同湖泊与溪流的NA日期存在差异，因湖泊冰盖覆盖时长更长。 csv文件"Daily_aquatic_vertical_C_emissions_SRC"包含以下每日数据集： - SRC区域内3个湖泊的平均总甲烷（CH4）排放量（包含冒泡排放与扩散通量，详见正文），单位：毫摩尔每平方米每天（mmol/m²/d） - SRC区域内3个湖泊的平均二氧化碳（CO2）排放量，单位：毫摩尔每平方米每天（mmol/m²/d） - SRC区域内3个湖泊的总碳排放量，单位：兆克碳每天（Mg C/d，1 Mg = 10^6 克） - SRC区域内溪流的平均甲烷排放量，单位：毫摩尔每平方米每天（mmol/m²/d） - SRC区域内溪流的平均二氧化碳排放量，单位：毫摩尔每平方米每天（mmol/m²/d） - SRC区域溪流网络的总碳排放量，单位：兆克碳每天（Mg C/d，1 Mg = 10^6 克） 该文件收录了非冰冻期的日度数据。NA代表无有效数据——此类日期中湖泊被冰盖覆盖，溪流封冻，几乎无或完全无水流。不同湖泊与溪流的NA日期存在差异，因湖泊冰盖覆盖时长更长。 csv文件"Stream_DIC_concentrations"包含在SRC区域出水口附近监测站测得的溶解无机碳浓度，单位：微摩尔（µM）。该文件仅收录了实际开展监测的日期，其余日期未列入。 csv文件"Stream_DOC_concentrations"包含在SRC区域出水口附近监测站测得的溶解有机碳浓度，单位：毫克每升（mg/L）。部分日期开展了多次监测，此类数据为独立采样样本而非重复样。该文件仅收录了实际开展监测的日期，其余日期未列入。 csv文件"Stream_gas_concentrations_k_SRC"包含以下各项的日均值（为SRC区域内不同溪流段当日所有监测数据的平均值）： - 实测分压二氧化碳（pCO2），单位：微大气压（µatm） - 实测甲烷浓度，单位：微摩尔（µM） - 模拟得到的气体传输速率（k值），单位：米每天（m/d） NA代表无有效数据，详细信息详见正文。 该数据集最初发布于DiVA平台，并于2024年迁移至SND平台。