Some computations of the variation of vertical velocity with pressure on a synoptic scale

Knighting, E.

doi:10.1002/qj.49708636904

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…In spring 1954 the new director, O. G. Sutton, attended a computer conference in California which made a great impression on him (Sutton 1954a(Sutton , 1955b (Knighting 1956b(Knighting , 1956c(Knighting , 1960a(Knighting , 1960bKnighting et al 1959Knighting et al , 1960. He also wrote review articles (Knighting 1961a(Knighting , 1961b, reports from international meetings (Knighting 1957a(Knighting , 1957b(Knighting , 1962b(Knighting , 1962c(Knighting , 1965 and numerous popular articles where he promoted NWP (Knighting 1951(Knighting , 1956a(Knighting , 1958(Knighting , 1961c(Knighting , 1961d(Knighting , 1962a.…”

Section: Impressions From Abroadmentioning

confidence: 99%

Early operational Numerical Weather Prediction outside the USA: an historical introduction Part III: Endurance and mathematics – British NWP, 1948–1965

Persson

2005

Meteorological Applications

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Section: Impressions From Abroadmentioning

confidence: 99%

Early operational Numerical Weather Prediction outside the USA: an historical introduction Part III: Endurance and mathematics – British NWP, 1948–1965

Persson

2005

Meteorological Applications

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“…A linearised form can be obtained from equations (2.6)-(2.S) by eliminating the time derivatives. This is the so-called 'omega' equation which takes the form (Knighting 1960):…”

Section: Dtmentioning

confidence: 99%

Numerical modelling of the atmosphere

Gilchrist¹

1979

Rep. Prog. Phys.

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Motions in the atmosphere on scales large enough to be useful in prediction for periods of a day and upwards are quasi-two-dimensional with wind speeds much greater in the horizontal than in the vertical. The first successful numerical forecast models were based on the barotropic equation which treats the motions as horizontal. Vertical motion is, however, essential for the conversion of potential to kinetic energy and later models have included a more adequate representation of the vertical structure and baroclinic processes. Most models at the present time use the dynamical equations in their general or 'primitive' form, allowing them to be applied to all parts of the global atmosphere. The boundary conditions generally include the mountain effect and assume no vertical motion at the top of the atmosphere. There are conflicting views on the adequacy of the latter assumption.For integrations simulating the atmosphere over extended periods the diabatic sources and sinks of energy need to be included parametrically in terms of the largescale flow. They are primarily radiative heating and cooling, the exchange of momentum heat and moisture with the Earth's surface, the spread of heat and moisture through the depth of the atmosphere by local instabilities (convection), and the effective dissipation caused by the transfer of energy to scales too small to be represented explicitly in the model. A large part of current research effort is devoted to deriving adequate parametrisations of these processes.The numerical methods used in models have to cope with strong non-linear interactions, the possible presence of non-meteorological motions with high phase speeds and the exponential growth of instabilities which are primarily responsible for the conversion of potential to kinetic energy, The existence of the latter sets a theoretical limit to atmospheric predictability.The success achieved in forecasts is much less than that indicated by the theoretical limit. The Global Atmospheric Research Programme (GARP) has as one of its main aims the assembling of global data sets of adequate quality to enable predictive capability to be tested realistically and, it is hoped, improved.

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The General Circulation of the Atmosphere*

Tucker

1962

Weather

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Some computations of the variation of vertical velocity with pressure on a synoptic scale

Cited by 11 publications

References 5 publications

Early operational Numerical Weather Prediction outside the USA: an historical introduction Part III: Endurance and mathematics – British NWP, 1948–1965

Early operational Numerical Weather Prediction outside the USA: an historical introduction Part III: Endurance and mathematics – British NWP, 1948–1965

Numerical modelling of the atmosphere

The General Circulation of the Atmosphere*

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