The 8th Implementation and Coordination Meeting (ICM-8) of the GCOS Reference Upper-Air Network (GRUAN) was held in Boulder, CO (25-29 April 2016). GRUAN and NDACC have had a long-standing collaboration (dating back to ICM-1 in 2009) that was further formalized by both GRUAN and NDACC becoming Cooperating Networks. NDACC scientists are playing increasingly important roles on the various GRUAN Task Teams and in the development of GRUAN Technical Documents for defining the needs and roles of ancillary measurements from other established networks such as NDACC.
NDACC News and Events
Tropospheric ozone is an important greenhouse gas and an air pollutant impacting human health and vegetation. Recent studies highlight the importance of increasing the number of tropospheric ozone profiling stations and long-term measurements to fully understand its sources and variability. The NDACC station of JPL-Table Mountain Facility (TMF, elev. 2285 m, California) has been operating a tropospheric ozone DIAL system since 1999, thus providing high vertical resolution profiles of ozone throughout the troposphere and lower stratosphere (3-24 km).
Like carbon dioxide, methane is one of the most important greenhouse gases. After a period of stagnation around 2000, atmospheric methane concentrations started to rise again in 2007. So far, the causes have been unknown. According to the recent study of climate scientists of Karlsruhe Institute of Technology (KIT), at least 40% of this increase result from the growing production of oil and natural gas in the northern hemisphere. The results are now published in the “Atmospheric Chemistry and Physics” journal. (DOI:10.5194/acp-16-3227-2016)
With help from the NDACC Data Host Facility, the Theory and Analysis Working Group has uploaded model support files to the NDACC data archive. There are two types of content, one customized for the FTIR group and the other for the Lidar, Dobson, and Sonde working groups. File content is based on each group’s request for constituent and meteorological fields. The support files were created from a Hindcast simulation produced by the NASA Global Modeling Initiative (GMI) chemistry transport model integrated with MERRA (reanalysis) meteorology.