The 23rd Conference on Hurricanes and Tropical Meteorology

J1.8
SOME OUTSTANDING PRODUCTS FROM THE GATE CONVECTION DATA SET- A PERSONAL VIEW (INVITED)

Joanne Simpson, NASA/GSFC, Greenbelt, MD; and W. K. Tao

<HTML>
<BODY>

<FONT FACE="Courier New" SIZE=2><P>The GATE data set is clearly the best and most beneficially used than that from any other field program in atmospheric sciences, despite many participants' initial qualms concerning "big science". The GATE convection data are being continually revisited for new purposes. The main reasons for the outstanding success were careful planning and particularly careful quality controls and accessible data archiving for these 25 years and beyond. Indispensable for this unique productivity was the funding for the first five-year analysis period. It is ironic that the stated goal of GATE was to properly parameterize convective processes in the large-scale numerical models, which has not and may not be accomplished. Directly following the field phase, years of intensive labor were devoted to quantitative descriptions of cloud and boundary layer processes, of which some will be illustrated. The analyses were returned to again and again as new ideas evolved. Major results include:</P>


<UL>
<LI>Recognition and documentation of the contributions of both convective and stratiform rain in convective cloud clusters, later called MCS's</LI>
<LI>Recognition and documentation of key organization of convection, into fast moving squall lines and nearly stationary or slow moving clusters</LI>
<LI>Greatly improved documentation on cloud-subcloud layer interactions</LI>
<OL TYPE="a">

<LI>cumulus "roots" below cloud base, unlike strong trade conditions</LI>
<LI>Wake of cloud clusters in term of stabilization and drying, often lasting 10-20 hours, from bringing down mid-level, low qe air.</LI></OL>

<LI>Vast improvements in cumulus modeling, from single clouds to cloud ensemble models which will use the GATE data set forever, with each major model improvement.</LI>
<LI>The birth of the TRMM concept using the GATE shipboard radar data set to show that precipitation sampling would be adequate for a space mission to measure rainfall over the global tropics and diurnal cycle.</LI></UL>


<P>The last two bullets will be discussed in more detail in the presentation.</P></FONT></BODY>
</HTML>

The 23rd Conference on Hurricanes and Tropical Meteorology