Each file is a compresssed tar file containing 30/31 day files in netcdf format.To download, select the files needed and scroll down and choose 'zip' for Download file type. Click on "Create Download File....", wait till the zip file is created and click on the link provided to download the zip file. e.g. Picked three month of the .gz file and downloaded as a zip file. The file was named WWW-AIR_1552920507.zip i) unzip WWW-AIR_1552920507.zip Archive: WWW-AIR_1552920507.zip extracting: ACTIVATE-MET_Analysis_20170201_R0_20170228_MERRA2-MODIS.gz extracting: ACTIVATE-MET_Analysis_20170301_R0_20170331_MERRA2-MODIS.gz extracting: ACTIVATE-MET_Analysis_20180101_R0_20180131_MERRA2-MODIS.gz ii) gzip -d ACTIVATE-MET_Analysis_20170201_R0_20170228_MERRA2-MODIS.gz iii) to extract the daily files - tar xf ACTIVATE-MET_Analysis_20170201_R0_20170228_MERRA2-MODIS tar xvf ACTIVATE-MET_Analysis_20170301_R0_20170331_MERRA2-MODIS x 03/ x 03/ACTIVATE-MERRA2_MODIS_20170301.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170305.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170330.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170321.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170325.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170307.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170309.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170306.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170329.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170303.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170323.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170327.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170312.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170304.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170302.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170331.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170311.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170328.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170322.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170324.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170313.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170314.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170319.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170308.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170320.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170318.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170317.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170315.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170326.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170316.nc.gz x 03/ACTIVATE-MERRA2_MODIS_20170310.nc.gz iv) uncompress the individual file 03/ACTIVATE-MERRA2_MODIS_20170301.nc.gz