Accession Number:

ADA413813

Title:

Surface Layer Stability Transition Research, Minimum Time Delay From Sunrise: 2001 March Case Study

Descriptive Note:

Final rept.

Corporate Author:

ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM BATTLEFIELD ENVIRONMENT DIRECTORATE

Report Date:

2003-05-01

Pagination or Media Count:

64.0

Abstract:

Near surface target acquisition and EO propagation significantly improve during the Surface Layer Stability Transition SLST. Thus, this research expands Army Chief of Staff Shinsekis vision from to see first to, to see better. The SLST is also starting and ending points for the atmospheric convection growth phase, an important factor in chemical warfare modeling. In 2001, the Meteorological-Sensors Integration Team of the Army Research Laboratory conducted the first of three field tests with the primary purpose of characterizing, modeling and exploiting repeatable patterns in the lower portion of the atmospheric boundary layer. The repeatable patterns investigated were the morning Stability Transitions ST or Neutral Events NE. The 2001 March 20-22 test dates were selected based on a forecasted minimal time interval between the local Sunrise and an Ideal case NE. Two subsequent field tests addressed the maximum June and a second minimum September Sunrise-to-NE time interval. These latter Tests are documented separately. The Surface Layer Stability Transition research pursued two measurement and analysis methods Eulerian Tower data and quasi-Lagrangian Rawinsonde data. The results included validation data for the Ideal Neutral Event Forecast Model and a characterization of a desert stable-neutral-unstable morning transition over the Equinox time period. The information documented here serves as a useful building block in support of the primary goal.

Subject Categories:

  • Atmospheric Physics
  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE