An Assessment of Data from the Advanced Technology Microwave Sounder at the Met Office
Joint Authors
Doherty, Amy
Atkinson, Nigel
Bell, William
Smith, Andrew
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-06
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
An appraisal of the Advanced Technology Microwave Sounder (ATMS) for use in numerical weather prediction (NWP) is presented, including an assessment of the data quality, the impact on Met Office global forecasts in preoperational trials, and a summary of performance over a period of 17 months operational use.
After remapping, the noise performance (NEΔT) of the tropospheric temperature sounding channels is evaluated to be approximately 0.1 K, comparing favourably with AMSU-A.
However, the noise is not random, differences between observations and simulations based on short-range forecast fields show a spurious striping effect, due to 1/f noise in the receiver.
The amplitude of this signal is several tenths of a Kelvin, potentially a concern for NWP applications.
In preoperational tests, adding ATMS data to a full Met Office system already exploiting data from four microwave sounders improves southern hemisphere mean sea level pressure forecasts in the 2- to 5-day range by 1-2%.
In operational use, where data from five other microwave sounders is assimilated, forecast impact is typically between −0.05 and −0.1 J/kg (3.4% of total mean impact per day over the period 1 April to 31 July 2013).
This suggests benefits beyond redundancy, associated with reducing already small analysis errors.
American Psychological Association (APA)
Doherty, Amy& Atkinson, Nigel& Bell, William& Smith, Andrew. 2015. An Assessment of Data from the Advanced Technology Microwave Sounder at the Met Office. Advances in Meteorology،Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052862
Modern Language Association (MLA)
Atkinson, Nigel…[et al.]. An Assessment of Data from the Advanced Technology Microwave Sounder at the Met Office. Advances in Meteorology No. 2015 (2015), pp.1-16.
https://search.emarefa.net/detail/BIM-1052862
American Medical Association (AMA)
Doherty, Amy& Atkinson, Nigel& Bell, William& Smith, Andrew. An Assessment of Data from the Advanced Technology Microwave Sounder at the Met Office. Advances in Meteorology. 2015. Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1052862
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1052862