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Viewing posts from July, 2003

HALOE and SAGE observations confirm expected ozone layer recovery
in Satellite data

NASA satellite observations have provided the first evidence the rate of ozone depletion in the Earth's upper atmosphere is decreasing. This may indicate the first stage of ozone layer recovery.

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ERA-40 dataset complete and monthly means available!
in ECMWF data
Update on BADC archive of ERA-40 data: 6-hourly data and monthly means
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1. The 6-hourly ERA-40 Re-analysis Dataset - is now complete.
2. The monthly means for the ERA-40 Re-analysis Dataset - are now available (Includes a special note about INCORRECT FILES during the extraction period).

More details follow:

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1. The 6-hourly ERA-40 Re-analysis Dataset
==========================================

The 6-hourly data for the ERA-40 dataset is NOW COMPLETE in the main BADC archive from 1958-2001. Details about the type of data available can be found at:

http://badc.nerc.ac.uk/data/ecmwf-e40  and the links from that page. 

A parameters page provides a list of those available on each level type:

http://badc.nerc.ac.uk/data/ecmwf-e40/params.html

=======================================================
2. The monthly means for the ERA-40 Re-analysis Dataset
=======================================================

Two types of monthly mean are now available for the ERA-40 dataset. These are the:

i. Monthly diurnal means (moda) - calculated from all time steps in a given month (i.e. one mean per month).
ii. Monthly synoptic (6-hourly) means (mm) - calculated from all values of a given time of day in a given month (i.e. 4 means exist per month, at 00, 06, 12 and 18UTC).

Details on these means are now available at:

http://badc.nerc.ac.uk/data/ecmwf-e40/means.html

SPECIAL NOTE FOR USERS ACCESSING ERA-40 MEANS DURING THE EXTRACTION PERIOD:
===========================================================================
Please note that during the extraction period (January - May 2003) some of the monthly mean files were incorrect. The means were not clearly visible and had not been advertised at this period so I am not aware of anyone having used them. 

However, if you did locate the means and you have used those located under one of the following directories then please obtain the new means as directed in the link above. The directories where errors occurred were /badc/ecmwf-e40/data/diags, /disks/tornado4/e40_means/mm and /disks/tornado4/e40_moda/moda. All the erroneous means were deleted on 20th June 2003.

BADC Support 03/07/03.

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