ABoVE：2017 年北极地区大气 CO、CO2 和 CH4 浓度剖面图
【摘要】 ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017简介该数据集提供了 2017 年 4 月至 11 月期间北极碳飞机剖面 (Arctic-CAP) 月度采样活动期间阿拉斯加、育空地区和加拿大西北地区的大气一氧化碳 (CO)、二氧化碳 (CO2)、甲烷 (CH4) 和水蒸气浓...
ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017
简介
该数据集提供了 2017 年 4 月至 11 月期间北极碳飞机剖面 (Arctic-CAP) 月度采样活动期间阿拉斯加、育空地区和加拿大西北地区的大气一氧化碳 (CO)、二氧化碳 (CO2)、甲烷 (CH4) 和水蒸气浓度以及气温、气压、相对湿度和风速值的现场机载测量数据。观测结果平均间隔 10 秒，并报告样本数 (N) 和标准差。在六个月的每月活动中，北极-北方脆弱性实验 (ABoVE) 区域上空的飞行包括 25 个垂直剖面，从地表到 6 公里高度，所选位置旨在补充常规长期垂直剖面、遥感数据和地面通量塔测量数据。
这些数据是为北极 CAP 项目收集的，旨在捕捉作为 ABoVE 一部分的北半球高纬度碳循环的空间和时间动态。
摘要
| Variable | Units/format | Description |
|---|---|---|
| altitude | m.a.s.l. | Sample altitude (GPS altitude) in meters above sea level |
| flight_id | YYYYMMDD | A unique number identifying each flight. The format is the date in YYYYMMDD on which the flight began. See Table 1. |
| CH4 | nmol per mol | Mole fraction of methane in dry air. Average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion). Fill value: -9999 |
| CH4_nvalue | Number of individual measurements used to compute reported value. Fill value: -9 | |
| CH4_stdv | nmol per mol | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 |
| CH4_unc | nmol per mol | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 |
| CO2 | umol per mol | Mole fraction of carbon dioxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999 |
| CO2_nvalue | Number of individual measurements used to compute reported value. Fill value: -9 | |
| CO2_stdv | umol per mol | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999 |
| CO2_unc | umol per mol | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million).Fill value: -9999 |
| CO | nmol per mol | Mole fraction of carbon monoxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion). |
| CO_nvalue | Number of individual measurements used to compute reported value. Fill value: -9 | |
| CO_stdv | nmol per mol | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 |
| CO_unc | nmol per mol | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 |
| H2O | % | Water vapor; Average of all measurements made in the time interval. Fill value: -9999 |
| H20_nvalue | Number of individual measurements used to compute reported value. Fill value: -9 | |
| H20_stdv | % | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 |
| H2O_unc | % | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset |
| latitude | Decimal degrees | Latitude at which air sample was collected |
| longitude | Decimal degrees | Longitude at which air sample was collected |
| T | Degrees K | Air temperature from the Vaisala instrument; average of all measurements made in the time interval. Not calibrated |
| T_nvalue | Number of individual measurements used to compute reported value. Fill value: -9 | |
| T_stdv | Degrees K | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1 |
| T_unc | Degrees K | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 |
| P | Pa | Air pressure; average of all measurements made in the time interval. Not calibrated. Measuring instrument: Picarro G2401 |
| P_nvalue | Pa | Number of individual measurements used to compute reported value. Fill value: -9 |
| P_stdv | Pa | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 |
| P_unc | Pa | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 |
| profile_id | A unique integer greater than 0 for each profile on each flight number; a value of 0 means that those data are not part of a profile | |
| RH | % | Relative humidity; average of all measurements made in the time interval. Not calibrated |
| RH_nvalue | % | Number of individual measurements used to compute reported value. Fill value: -9 |
| RH_stdv | % | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 |
| RH_unc | % | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 |
| time | seconds since 1970-01-01T00:00:00Z | Number of seconds since January 1, 1970 in UTC. Time-averaged values are reported at the beginning of the averaging interval |
| time_components | YMDHMS | Calendar time components as integers. Times and dates are UTC. Time-averaged values are reported at the beginning of the averaging interval. Provided in the order: year, month, day, hour, minute, second |
| time_decimal | Decimal year in UTC. Time-averaged values are reported at the beginning of the averaging interval | |
| u | m/s | Eastward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999 |
| u_nvalue | m/s | Number of individual measurements used to compute reported value. Fill value: -9 |
| u_stdv | m/s | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 |
| u_unc | m/s | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 |
| v | m/s | Northward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999 |
| v_nvalue | m/s | Number of individual measurements used to compute reported value. Fill value: -9 |
| v_stdv | m/s | Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 |
| v_unc | m/s | Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 |
代码
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