The
ozone and aerosol sonde working group is responsible for
the activities pertaining to ozonesondes and various
aerosol sondes. The working group representatives on the
streering committe are: ---------------------------------- Notes on
Homogenization of ozone sonde data
------------------------------------------- New ------------ 2012/2013
- Guide
Lines for Homogenization of Ozone Sonde Data
(Nov. 19, 2012). Specific
guidelines on transfer functions to convert 1.0% KI
concentration measurements to either 0.5% KI
concentration, or ENSCI measurements to Science Pump
measurements. Section 8.1.2 of the overall guidelines -
Terry Deshler and Rene Stubi.
---------------------------------- Notes on
working group meeting
------------------------------------------------------------ Summary of
conclusions and recommended actions following the NDACC
ozonesonde working group meeting: 5 - 6 February 2009 at the Forschungszentrum
ICG-1/2, Juelich, Germany. 1) Data format recommendations for
submission of ozonesonde data to NDACC, using a NASA
AMES 2160 data format for all new data to be
submitted and, to the extent possible, for old data to be
resubmitted. The latter is desired to maintain consistency
of the data base. The following documents will guide you
in preparing newly formatted data files:. These files were
developed by Peter von der Gathen, Pavla Skrivankova, and
Terry Deshler. Questions on implementing these
recommendations may be addressed to any of us three. a) Word
document
describing the independent, dependent, and auxilliary
variables. c) Example when the
variables do not exceed the 132 character limit, Each
record is on a single line.
d) Code for data format
checker, requiring the arbirtrary limits on the number
of auxilliary variables and the number of auxilliary
character variables to be increased. This code is
slightly different than what you may already be using
by increasing the limits mentioned. All of this code
is to be run from a unix machine.
------------------------------------------------End
of
notes on working group meeting
-------------------------------------------------- DAAC Annual Report Form - required from each station once per year, prior to the steering committee meeting. Please email to Terry Deshler and Rene Stubi. The next steering committee meeting is in September 2009.Standard operating procedures ozonesondesThe standard operating procedures to be used for NDACC ozonesonde operation are those agreed upon after the JOSIE 1996, 1998, and 2000 experiments (Smit et al., 2007) and the BESOS experiment (Deshler et al., 2008). The working draft of the BESOS/JOSIE SOPS is in nearly final form. The recommendation concerning solution strengths is to use the manufacturer's recommended solution strengths, which are 1.0% KI for Science Pump and 0.5% KI for ENSCI. The 0.5% KI solution is to use half of the buffers used for the 1.0% KI. Current topics of concern: Data format. The variable options within the NASA-Ames format have allowed individual investigators to use a variety of data formats and to include a variety of ancillary variables. Rene and I feel this variability has led to some difficulties both for the data providers and for the data users. We propose to focus in the coming year on providing some standardized recommendations regarding these points. This will be accomplished by: 1) Summarizing the data formats and ancillary variables currently in use and reported on the NDACC data base. 2) Summarize the format used by the WOUDC 3) Prepare a document to suggest a common data format that could be recommended to the community. 4) Allow NDACC investigators the opportunity to comment on this document. 5) Organize a meeting in earlly 2009 to finalize the working group recommendations. 6) Distribute these recommendations to the community and offer some support for conversion of historical data to the common format. Homogenization of data sets which were collected using different ozonesonde manufacturers and non standard solution strengths. This may be particularly a problem for investigators which have used 1.0% KI in ENSCI sondes. Preliminary transfer functions have been proposed by Deshler et al. (2008) and Stubi et al. (2008), but additional work is required prior to acceptance of a more final transfer function. Work in this area is anticipated to continue. Ozonesonde background. There is still uncertainty about which is the best background to use and the best way to determine that background. Usually this background is determined by a filter measurement. Measurements with zero air are preferable particularly in tropical and humid regions; however, this is often not possible. Recent work in this area can be found in Voemel et al. (2009) and Stubi et al. (2008). We encourage additional discussion. Stations
Annual reports from the working groupThe ozone and aerosol sonde working group representatives assemble a yearly report on the activities of the measurement sites as well as other relevant activities. These reports are available as PDF documents and can be downloaded by clicking on the links below. From 2001 the reporting takes place via a standardised form (MS Word format) that the station PIs fill in and send to the working group representatives. 2005
Ozonesonde steering committee report to
Ozonesonde PIs. Letter from Mike Kurylo and Geir Braathen explaining the change of name from NDSC to NDACCReport presented at the SC meeting in Thun, Switzerland, Sept. 2000 (1853 kBytes) Report presented at the SC meeting in Sapporo, Japan, Oct. 1999 (2593 kBytes) Report presented at the SC meeting in St. Denis, France, Dec. 1998 (1031 kBytes) Report presented at the SC meeting in Ny-Ålesund, Norway, Aug. 1997 (59 kBytes) First Excel sheet that accompanies the 1997 report (374 kBytes). Second Excel sheet that accompanies the 1997 report (34 kBytes). Ozonesonde PI meeting, Potsdam, 1998A meeting for all the ozonesonde PIs of the NDSC and other stations was hosted by AWI, Potsdam in July 1998. The report from this meeting can be downloaded by clicking on the link below. |
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