News and Events

Progress continues on the migration of the NDACC DHF from its original home at NOAA's Climate Prediction Center (CPC) to its new home at NASA Langley Research Center (LaRC). New this month is the availability of the NCEP temperature and height extraction tool on the public LaRC NDACC DHF.

The latest SHADOZ Newsletter has been posted and SHADOZ was featured in NASA's bimonthly "Earth Observer." Both publications describe three recent SHADOZ regional meetups to build up communications while locked down and the change in PI from Anne Thompson to Ryan Stauffer.

The simulation has been rerun and new GMI CTM 2020 files are available for FTIR, Lidar, Sonde, and Dobson sites. Due to a peculiar error, all model inputs after May 4, 2020 had been flipped by 180º longitude.

Plans for the 2021 NDACC Steering Committee annual meeting are underway. Originally scheduled to take place at the NOAA Center for Weather and Climate Prediction (NCWCP) in College Park, MD, the meeting has been changed to a virtual format because of ongoing COVID-19 restrictions.

As presented at recent Steering Committee Meetings the NDACC DHF has been transitioning from service at NOAA/CPC to NASA Langley Research Center (LaRC). In the Fall 2020 meeting we noted that the DHF at LaRC was running in mirror mode, with all files running through the format/ingest codes.

A Cooperating Network Agreement between NDACC and the European Brewer Network (EUBREWNET) was finalized on 19 April 2021.

The new NDACC Lidar Working Group (LWG) website features a review of the NDACC lidar stations and instruments, with new links and functionality to check data availability and access them. Fine-tuning of the website content will continue over the upcoming weeks.

Updates and corrections to the GMI chemical mechanism and its input files have been used to create a new Hindcast simulation with MERRA2 meteorology. The changes compared to the previous GMI simulation are generally small and you probably won’t see any large impacts on chemical constituents.

Nitrous oxide (N2O) is the third most important greenhouse gas (GHG) after carbon dioxide (CO2) and methane (CH4). Its global warming potential is about 300 times larger than CO2 for a 100 year timescale. Surface in-situ observations show that N2O is steadily rising since the 1970's.

Worldwide efforts to contain spreading of the COVID-19 pandemic have reduced emissions from surface traffic by about 15% on average over the year 2020. Air-traffic (and emissions) went down by 40% on average.