{"id":11913,"date":"2024-02-15T22:12:47","date_gmt":"2024-02-15T21:12:47","guid":{"rendered":"https:\/\/www.swissfluxnet.ethz.ch\/?page_id=11913"},"modified":"2025-04-15T12:31:20","modified_gmt":"2025-04-15T10:31:20","slug":"conversion-sequences","status":"publish","type":"page","link":"https:\/\/swissfluxnet.ethz.ch\/index.php\/documentation\/conversion-sequences\/","title":{"rendered":"Conversion Sequences"},"content":{"rendered":"

Below are unit conversions of often needed flux variables.<\/p>\n

The individual steps are given so we can spot any errors more easily.<\/p>\n

Please use at your own risk, always double-check.<\/strong><\/p>\n

 <\/p>\n

CO2<\/strong><\/h2>\n

<\/i> umol CO2 m-2 s-1 \u2192 g CO2 m-2 30min-1<\/h3>\n\n\n\n\n\n\n\n\n\n\n
 <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\n <\/td>\n <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\nGain<\/strong><\/td>\nTotal Gain
\n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
umol<\/td>\nCO2<\/td>\nm-2<\/td>\ns-1<\/td>\n\u2192<\/td>\numol<\/td>\nCO2<\/td>\nm-2<\/td>\nmin-1<\/strong><\/td>\n60<\/strong><\/td>\n <\/td>\n<\/tr>\n
umol<\/td>\nCO2<\/td>\nm-2<\/td>\nmin-1<\/td>\n\u2192<\/td>\numol<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/strong><\/td>\n30<\/strong><\/td>\n <\/td>\n<\/tr>\n
umol<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\nug<\/strong><\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n44.0095<\/strong><\/td>\n <\/td>\n<\/tr>\n
ug<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\ng<\/strong><\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u202d0.000001\u202c (10-6<\/sup>)<\/strong><\/td>\n <\/td>\n<\/tr>\n
 <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
umol<\/strong><\/td>\nCO2<\/strong><\/td>\nm-2<\/strong><\/td>\ns-1<\/strong><\/td>\n\u2192<\/strong><\/td>\ng<\/strong><\/td>\nCO2<\/strong><\/td>\nm-2<\/strong><\/td>\n30min-1<\/strong><\/td>\n <\/td>\n\u202d0.0792171\u202c<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Example<\/h4>\n
    \n
  1. Half-hourly flux results from EddyPro show CO2 uptake: -20 umol CO2 m-2 s-1<\/li>\n
  2. The total amount of CO2 uptake in this half-hour is calculated by applying the total gain: -20 * 0.0792171<\/code><\/li>\n
  3. In this half-hour, the CO2 uptake was: -1.584342\u202c g CO2 m-2 30min-1<\/li>\n
  4. Simplified, the CO2 uptake over 30 minutes was 1.6 g m-2<\/li>\n<\/ol>\n

     <\/p>\n

    <\/i> umol CO2 m-2 s-1 \u2192 g C m-2 30min-1<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
     <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\n <\/td>\n <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\nGain<\/strong><\/td>\nTotal Gain
    \n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
    umol<\/td>\nCO2<\/td>\nm-2<\/td>\ns-1<\/td>\n\u2192<\/td>\numol<\/td>\nCO2<\/td>\nm-2<\/td>\nmin-1<\/strong><\/td>\n60<\/strong><\/td>\n <\/td>\n<\/tr>\n
    umol<\/td>\nCO2<\/td>\nm-2<\/td>\nmin-1<\/td>\n\u2192<\/td>\numol<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/strong><\/td>\n30<\/strong><\/td>\n <\/td>\n<\/tr>\n
    umol<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\nug<\/strong><\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n44.0095<\/strong><\/td>\n <\/td>\n<\/tr>\n
    ug<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\ng<\/strong><\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u202d0.000001\u202c (10-6<\/sup>)<\/strong><\/td>\n <\/td>\n<\/tr>\n
    g<\/td>\nCO2<\/td>\nm-2<\/td>\n30min-1<\/td>\n <\/td>\ng<\/td>\nC<\/strong><\/td>\nm-2<\/td>\n30min-1<\/td>\n\u202d0.2729115304650132\u202c<\/strong><\/td>\n <\/td>\n<\/tr>\n
     <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
    umol<\/strong><\/td>\nCO2<\/strong><\/td>\nm-2<\/strong><\/td>\ns-1<\/strong><\/td>\n\u2192<\/strong><\/td>\ng<\/strong><\/td>\nC<\/strong><\/td>\nm-2<\/strong><\/td>\n30min-1<\/strong><\/td>\n <\/td>\n\u202d0.02161926\u202c<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Example<\/h4>\n
      \n
    1. Half-hourly flux results from EddyPro show CO2 uptake: -20 umol CO2 m-2 s-1<\/li>\n
    2. The total amount of carbon uptake in this half-hour is calculated by applying the total gain: -20 * 0.02161926<\/code><\/li>\n
    3. In this half-hour, the carbon uptake was: \u202d-0.4323852\u202c\u202c g C m-2 30min-1<\/li>\n
    4. Simplified, the carbon uptake over 30 minutes was 0.4 g m-2<\/li>\n<\/ol>\n

       <\/p>\n

      \n

       <\/p>\n

      N2O<\/strong><\/h2>\n

      <\/i> nmol N2O m-2 s-1 \u2192 kg N2O-N2 ha-1 30min-1<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
       <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\n <\/td>\n <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\nGain<\/strong><\/td>\nTotal Gain
      \n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
      nmol<\/td>\nN2O<\/td>\nm-2<\/td>\ns-1<\/td>\n\u2192<\/td>\nnmol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/strong><\/td>\n60<\/strong><\/td>\n <\/td>\n<\/tr>\n
      nmol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/td>\n\u2192<\/td>\nnmol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/strong><\/td>\n30<\/strong><\/td>\n <\/td>\n<\/tr>\n
      nmol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\nnmol<\/td>\nN2O<\/td>\nha-1<\/strong><\/td>\n30min-1<\/td>\n10000<\/strong><\/td>\n <\/td>\n<\/tr>\n
      nmol<\/td>\nN2O<\/td>\nha-1<\/td>\n30min-1<\/td>\n\u2192<\/td>\nng<\/strong><\/td>\nN2O<\/td>\nha-1<\/td>\n30min-1<\/td>\n44.013<\/strong><\/td>\n <\/td>\n<\/tr>\n
      ng<\/td>\nN2O<\/td>\nha-1<\/td>\n30min-1<\/td>\n\u2192<\/td>\nkg
      \n<\/strong><\/td>\n      		N2O<\/td>\nha-1<\/td>\n30min-1<\/td>\n10-12<\/sup>
      \n<\/strong><\/td>\n      		 <\/td>\n<\/tr>\n
      kg<\/td>\nN2O<\/td>\nha-1<\/td>\n30min-1<\/td>\n\u2192<\/td>\nkg
      \n<\/strong><\/td>\n      		N2O-N2<\/strong><\/td>\nha-1<\/td>\n30min-1<\/td>\n0.63648<\/strong><\/td>\n <\/td>\n<\/tr>\n
       <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
      nmol<\/strong><\/td>\nN2O<\/strong><\/td>\nm-2<\/strong><\/td>\ns-1<\/strong><\/td>\n\u2192<\/strong><\/td>\nkg<\/strong><\/td>\nN2O-N2<\/strong><\/td>\nha-1<\/strong><\/td>\n30min-1<\/strong><\/td>\n <\/td>\n0.00050424109632<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Total gain:<\/strong><\/span> 0.00050424109632<\/code><\/strong><\/p>\n

       <\/p>\n

      <\/i> umol N2O m-2 s-1 \u2192 g N2O m-2 30min-1<\/h3>\n\n\n\n\n\n\n\n\n\n\n
       <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\n <\/td>\n <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\nGain<\/strong><\/td>\nTotal Gain
      \n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
      umol<\/td>\nN2O<\/td>\nm-2<\/td>\ns-1<\/td>\n\u2192<\/td>\numol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/strong><\/td>\n60<\/strong><\/td>\n <\/td>\n<\/tr>\n
      umol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/td>\n\u2192<\/td>\numol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/strong><\/td>\n30<\/strong><\/td>\n <\/td>\n<\/tr>\n
      umol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\nug<\/strong><\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n44.0128<\/strong><\/td>\n <\/td>\n<\/tr>\n
      ug<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\ng<\/strong><\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u202d0.000001\u202c (10-6<\/sup>)<\/strong><\/td>\n <\/td>\n<\/tr>\n
       <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
      umol<\/strong><\/td>\nN2O<\/strong><\/td>\nm-2<\/strong><\/td>\ns-1<\/strong><\/td>\n\u2192<\/strong><\/td>\ng<\/strong><\/td>\nN2O<\/strong><\/td>\nm-2<\/strong><\/td>\n30min-1<\/strong><\/td>\n <\/td>\n\u202d0.07922304\u202c<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Example<\/h4>\n
        \n
      1. \n
          \n
        1. Half-hourly flux results from EddyPro show N2O emission: 0.005 umol N2O m-2 s-1<\/li>\n
        2. The total amount of N2O uptake in this half-hour is calculated by applying the total gain: 0.005 * \u202d0.07922304\u202c<\/code><\/li>\n
        3. In this half-hour, the N2O emission was: \u202d0.0003961152\u202c\u202c\u202c g N2O m-2 30min-1<\/li>\n
        4. Simplified, the N2O emission over 30 minutes was 0.4 mg m-2<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

           <\/p>\n

          <\/i> nmol N2O m-2 s-1 \u2192 g N2O m-2 30min-1<\/h3>\n\n\n\n\n\n\n\n\n\n\n
           <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\n <\/td>\n <\/td>\nCompound<\/strong><\/td>\nArea<\/strong><\/td>\nTime<\/strong><\/td>\nGain<\/strong><\/td>\nTotal Gain
          \n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
          nmol<\/td>\nN2O<\/td>\nm-2<\/td>\ns-1<\/td>\n\u2192<\/td>\nnmol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/strong><\/td>\n60<\/strong><\/td>\n <\/td>\n<\/tr>\n
          nmol<\/td>\nN2O<\/td>\nm-2<\/td>\nmin-1<\/td>\n\u2192<\/td>\nnmol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/strong><\/td>\n30<\/strong><\/td>\n <\/td>\n<\/tr>\n
          nmol<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\nng<\/strong><\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n44.0128<\/strong><\/td>\n <\/td>\n<\/tr>\n
          ng<\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u2192<\/td>\ng<\/strong><\/td>\nN2O<\/td>\nm-2<\/td>\n30min-1<\/td>\n\u202d0.000000001\u202c (10-9<\/sup>)<\/strong><\/td>\n <\/td>\n<\/tr>\n
           <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n
          nmol<\/strong><\/td>\nN2O<\/strong><\/td>\nm-2<\/strong><\/td>\ns-1<\/strong><\/td>\n\u2192<\/strong><\/td>\ng<\/strong><\/td>\nN2O<\/strong><\/td>\nm-2<\/strong><\/td>\n30min-1<\/strong><\/td>\n <\/td>\n\u202d0.00007922304\u202c<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Example<\/h4>\n
            \n
          1. Half-hourly flux results from EddyPro show N2O emission: 5 nmol N2O m-2 s-1<\/li>\n
          2. The total amount of N2O uptake in this half-hour is calculated by applying the total gain: 5 * \u202d\u202d0.00007922304\u202c<\/code><\/li>\n
          3. In this half-hour, the N2O emission was: \u202d0.0003961152\u202c\u202c\u202c\u202c g N2O m-2 30min-1<\/li>\n
          4. Simplified, the N2O emission over 30 minutes was 0.4 mg m-2<\/li>\n<\/ol>\n

             <\/p>\n

            \n

             <\/p>\n

            CH4<\/strong><\/h2>\n