A comment on the chain subduction criterion

Lorenc, J.; Przystawa, J.; Cracknell, A. P.

doi:10.1088/0022-3719/13/10/015

Cited by 16 publications

(9 citation statements)

References 9 publications

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“…These data show the eastward propagating 30-50-day mode which interacted with the onset of the summer monsoon in 1979. Further description and interpretation is given by Lorenc (1984). The qualitative agreement between the two sets of analyses and this description is excellent.…”

Section: (A) Divergence and Vertical Motionmentioning

confidence: 60%

“…The vertical motion fields which result from the EC3B initialization, as provided in the standard analysis data tapes, are an example of this. Adiabatic nonlinear normal model initialization is related to the quasi-geostrophic balance equation (Leith 1980), and the results obtained by the EC3B system are in realistic agreement with this theory for synoptic-scale extra-tropical motion (Lorenc 1981a;Hollingsworth et al 1984). However, diabatically driven motions, particularly important in the tropics, are not accurately represented.…”

Section: (A) Divergence and Vertical Motionmentioning

confidence: 66%

“…in one case r.m.s. differences were 3.4 and 2 4 m b respectively : Lorenc 1981b). This, along with poorer data coverage and possibly model bias, caused the M03A analyses to underestimate the intensity of southern hemisphere eddies.…”

Section: ( C ) Sign$cant Differences Between Analysis Systemsmentioning

confidence: 98%

Section: (B) Ecmwf (Ec3b)mentioning

confidence: 99%

“…The ECMWF data assimilation scheme has been described by Lorenc (1981a), and Bengtsson et al (1982a). A 6-hour forecast was interpolated from sigma coordinates to standard pressure levels, and used as first guess for a multivariate statistical height and wind analysis (Lorenc 1981c) and a univariate humidity analysis. These were then interpolated back to sigma coordinates and initialized using a nonlinear normal mode initialization procedure (Machenhauer 1977;Temperton and Williamson 1981 ;Williamson and Temperton 1981).…”

Section: (B) Ecmwf (Ec3b)mentioning

confidence: 99%

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On the accuracy of general circulation statistics calculated from FGGE data—a comparison of results from two sets of analyses

Lorenc

Swinbank

1984

Quart J Royal Meteoro Soc

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S W R YBy comparing statistics from two independent sets of analyses, and relating the differences seen to known characteristics of the analysis system, an indication is given of the likely accuracy of typical general circulation statistics calculated from FGGE data. The analyses compared are those made by the European Centre for Medium Range Weather Forecasts using the main delayed mode observations, and those made in near real time by the Meteorological Office FGGE analysis system. Examples are given of the accuracy of both zonal means and geographical distributions, for basic time mean fields, for derived fields such as divergence, variances and fluxes, and for budget calculations.It was found that qualitative agreement between the two sets of statistics was very good, even in the tropics and southern hemisphere. Quantitative agreement was also in general good; most of the systematic differences could be traced to known characteristics of the analysis systems.

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Section: (A) Divergence and Vertical Motionmentioning

confidence: 60%

Section: (A) Divergence and Vertical Motionmentioning

confidence: 66%

Section: ( C ) Sign$cant Differences Between Analysis Systemsmentioning

confidence: 98%

Section: (B) Ecmwf (Ec3b)mentioning

confidence: 99%