ISLSCP II GLOBALVIEW: ATMOSPHERIC CO2 CONCENTRATIONS

The GlobalView Carbon Dioxide (CO2) data product contains synchronized and smoothed time series of atmospheric CO2 concentrations at selected sites that were created using the data extension and integration techniques described by Masarie and Tans, (1995). The information needed to derive this time series is also in this data set, along with extensive documentation. The longest period of coverage is from 1979 to 2001 with some sites having longer or shorter temporal coverage.
Note that the GlobalView CO2 data products are derived from measurements but contain no actual data. To facilitate heterogeneous CO2 data use in carbon cycle modeling studies, the measurements have been processed (smoothed, interpolated, and extrapolated) resulting in extended records that are evenly incremented in time.
There are 92 files with this data set which includes 89 *.zip data files. The other three files include 2 files with site information, one comma-delimited ASCII file (.csv), and one .dat file, and one .dat file which is a single reference marine boundary layer matrix file which contains CO2 mixing ratios as a function of time and sine of latitude and is a by-product of the data extension procedure.

GlobalView二氧化碳（CO₂）数据产品包含了选定站点的大气CO₂浓度同步平滑时间序列，此类序列采用Masarie与Tans（1995）所述的数据扩展与整合技术生成。本数据集还涵盖推导该时间序列所需的全部信息，以及详尽的文档资料。数据覆盖的最长时段为1979年至2001年，部分站点的时间覆盖时长或长或短。

请注意，GlobalView CO₂数据产品源自实测数据，但本身并未包含原始实测数据。为便于碳循环建模研究中异构CO₂数据的使用，研究人员对实测数据进行了处理（平滑、插值与外推），生成了时间步长均匀的扩展数据集。

本数据集共包含92个文件，其中89个为*.zip格式的数据文件。剩余3个文件分别为：2份站点信息文件（包含1份逗号分隔ASCII格式（.csv）文件与1份.dat文件），以及1份作为数据扩展程序副产品的海洋边界层参考矩阵文件（.dat），该文件包含了随时间与纬度正弦值变化的CO₂混合比数据。