Browsed by
Month: May 2013

LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

LI-COR Analyzers Monitoring Carbon Dioxide Worldwide as Atmospheric Levels Reach 400 parts per million

On May 13, the National Oceanic and Atmospheric Administration (NOAA) reported a preliminary daily average carbon dioxide (CO2) reading of 400.07 parts per million (ppm) at the Mauna Loa Observatory on the Big Island of Hawaii.

On May 9, a reading over 400 ppm was reported at the site for the first time ever. But that reading (400.03 ppm) was later revised to 399.89 ppm. The first CO2 measurement at the observatory was 313 ppm in 1958. According to the…

Read More Read More

Adjusting Timestamps for Daylight Savings Time (DST)

Adjusting Timestamps for Daylight Savings Time (DST)

In flux data analysis it is common to compare the local site data with data from other sites that are in regional or global flux networks (eg. AmeriFlux, FluxNet, AsiaFlux).  The issue of timestamp is important for such comparisons and using a time stamp that adjusts for Daylight Savings Time (DST) complicates the comparison because DST is not applied in all regions. Therefore the consensus in the community is to use standard time without adjusting for DST.

In the LI-COR…

Read More Read More