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Plan for U.S. Participation in the GARP Atlantic Tropical Experiment (1971) / Chapter Skim
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OBSERVATIONAL STRATEGY
Pages 13-18

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From page 13...
... 3.1 Definition of the Synoptic-Scale Fields Definition of the synoptic-scale fields will be accomplished primarily by satellite observations, which must be routinely available by the time of the experiment. These will be supplemented by radiosonde observations from land and ship stations in the region of the experiment together with reports from commercial aircraft and ships of opportunity (in addition to the ordinary net13
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From page 14...
... A certain number of dropsonde or ship-based radiosonde observations may be required to provide additional definition over the remote midoceanic regions. The number of ships that can be used for this purpose will be limited to those that are available over and above what is needed for monitoring bulk properties of convective ensembles (see Sec.
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From page 15...
... In order to obtain the necessary vertical and time resolution it will be necessary to supplement the radiosonde data with soundings made with tethered balloons. 3.2.4 The network should be fixed in space and should operate on a regular schedule for radiosonde ascents (6-hour intervals during undisturbed periods and 2- or 3-hour intervals during disturbed periods)
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From page 16...
... the rate of sensible heat flux and evaporation from the sea surface under disturbed conditions; (b) typical distribution of drop sizes, liquid water content, and relative humidity in and around deep convective clouds; (c)
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From page 17...
... Definition of the synoptic-scale fields will be based on a refined version of current operational analysis techniques, which already make extensive use of a mix of satellite, radiosonde, commercial aircraft, and surface observations.
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From page 18...
... The observational plan outlined above will rely on radar and satellite data for determining the position, size, shape, and intensity of the mesoscale convective systems within the network. Since both vorticity and divergence of the horizontal wind field tend to be concentrated within the mesoscale convective elements, there is reason to hope that the area integrals obtained from rather widely spaced stations, if carefully interpreted, can serve to define the gross features of the mesoscale wind field.
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Key Terms

  • bulk properties
  • active convection
  • mesoscale convective
  • convective elements
  • observational program

  • internal structure
  • intensive sampling
  • monitoring bulk
  • convective clouds
  • encountering active

  • instrumented aircraft
  • radiosonde network
  • world weather
  • western pacific
  • radiosonde observations

  • wind field
  • commercial aircraft
  • representative statistics
  • sufficient accuracy
  • weather watch

  • deep convective
  • active convective
  • observational plan
  • observational strategy
  • total observational

  • observational requirements
  • observational tools
  • greatly reduced
  • field tend
  • sea surface


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