Large-Scale Trends in Upper Air Sounding Data Across the United States (136)

Jaret Rogers, NOAA/NWS, Phoenix, AZ

Patrick Marsh, NOAA/NWS/NCEP/SPC

Richard Thompson, NOAA/NWS/NCEP/SPC

Patrick Skinner, CIMMS/Univ. of Oklahoma and NOAA/NSSL



Historical analyses of upper-air sounding data across the United States have largely been relegated to specific time periods and base weather elements, such as temperatures aloft. However, no known comprehensive study exists that has provided a thorough analysis of the complete upper-air sounding record. Utilizing the robust and quality-controlled upper-air sounding dataset archive from the Storm Prediction Center (SPC), which dates back to the 1950s for many routine upper-air sites, this study seeks to provide an in-depth analysis of large-scale trends in a variety of weather elements across the United States. Specifically, the goal of this study is to provide an examination of directly measured and derived parameters related to thermodynamic and kinematic properties. Examples of weather elements that have not been examined in-detail up to this point include various computed instability (e.g., Convective Available Potential Energy), kinematic (e.g., bulk-layer shear), and moisture parameters (e.g, precipitable water). Of particular interest, the interannual and interdecadal variability in the magnitude and spatial distribution across the United States will be examined to determine if any significant longer term trends exist within the historical upper-air sounding record.