NDACC News

September
2018

SHADOZ (an NDACC Cooperating Network) data have been re-processed over the past 2-3 years with four papers documenting the activity and evaluating changes in the data and uncertainties as follows.  You may be able to download some of the articles directly from the publisher.  Otherwise, all are downloadable at the website: https://tropo.gsfc.nasa.gov/shadoz/SHADOZ_PubsList.html.

December
2017

Ozonesonde data are among the most popular observations in NDACC because the profiles are a mainstay of satellite calibration and are used to develop climatologies used in atmospheric chemical-climate models. Sonde data are used for analysis of lower stratospheric ozone trends, where satellites alone often do a poor job.  However, the ozonesonde instrument that is used at ~100 stations worldwide shows biases at different stations and discontinuities in profile time-series due to a variety of measurement procedures.

December
2017

As part of the SPARC (Stratosphere-troposphere Processes And their Role in Climate) water vapour assessment (WAVAS-II), satellite measurements taken from, or coincident with, seven sites from which ground-based microwave instruments measured water vapor in the middle atmosphere.  Six of the ground-based instruments are part of the Network for the Detection of Atmospheric Composition Change (NDACC) and provide datasets which can be used for drift and trend assessment.

November
2017

The annual meeting of the international Steering Committee (SC) for NDACC was held 6-10 November 2017 in Boulder, CO, USA at the National Center for Atmospheric Research (NCAR).  James Hannigan of NCAR hosted the meeting.  Dr. James Hurrell, a climate scientist and Director of NCAR, welcomed the attendees and gave a brief introduction to the Center’s facilities, mission, and associated programs in atmospheric and related sciences.

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