Preprints
https://doi.org/10.5194/amt-2020-347
https://doi.org/10.5194/amt-2020-347

  27 Oct 2020

27 Oct 2020

Review status: a revised version of this preprint was accepted for the journal AMT and is expected to appear here in due course.

A Reel-Down Instrument System for Profile Measurements of Water Vapor, Temperature, Clouds and Aerosol Beneath Constant Altitude Scientific Balloons

Lars E. Kalnajs1, Sean M. Davis2, J. Douglas Goetz1, Terry Deshler1, Sergey Khaykin3, Alex St. Clair1, Albert Hertzog4, Jerome Bordereau5, and Alexey Lykov6 Lars E. Kalnajs et al.
  • 1Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, Boulder, Colorado, 80303, USA
  • 2NOAA Chemical Sciences Laboratory, Boulder, Colorado, 80305, USA
  • 3LATMOS/IPSL, UVSQ, Sorbonne Université, CNRS, Guyancourt, 78280 France
  • 4Laboratoire de météorologie dynamique, Sorbonne Université, Palaiseau, 91128, France
  • 5Laboratoire de météorologie dynamique, CNRS, Palaiseau, 91128, France
  • 6Central Aerological Observatory of Roshydromet, Dolgoprudny, 141700 Moscow Region, Russia

Abstract. The Tropical Tropopause Layer (14–18.5 km) is the gateway for most air entering the stratosphere, and therefore processes within this layer have an outsized influence in determining global stratospheric ozone and water vapor concentrations. Despite the importance of this layer there are few in situ measurements with the necessary detail to resolve the fine scale processes within this region. Here, we introduce a novel platform for high resolution in situ profiling that lowers and retracts a suspended instrument package beneath drifting long duration balloons in the tropics. During a 100-day circumtropical flight, the instrument collected over 100 two-kilometer profiles of temperature, water vapor and aerosol at one-meter resolution, yielding unprecedented geographic sampling and vertical resolution. The instrument system integrates proven sensors for water vapor, temperature, pressure and cloud and aerosol particles with an innovative mechanical reeling and control system. A technical evaluation of the system performance demonstrated the feasibility of this new measurement platform for future missions with minor modifications. Six instruments planned for two upcoming field campaigns are expected to provide over 4000 profiles through the TTL, quadrupling the number of high-resolution aircraft and balloon profiles collected to date. These and future measurements will provide the necessary resolution to diagnose the importance of competing mechanisms for the transport of water vapor across the TTL.

Lars E. Kalnajs et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Lars E. Kalnajs et al.

Lars E. Kalnajs et al.

Viewed

Total article views: 213 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
154 57 2 213 7 6
  • HTML: 154
  • PDF: 57
  • XML: 2
  • Total: 213
  • BibTeX: 7
  • EndNote: 6
Views and downloads (calculated since 27 Oct 2020)
Cumulative views and downloads (calculated since 27 Oct 2020)

Viewed (geographical distribution)

Total article views: 298 (including HTML, PDF, and XML) Thereof 298 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 02 Mar 2021
Download
Short summary
This work introduces a novel instrument system for high resolution atmospheric profiling, that lowers and retracts a suspended instrument package beneath drifting long duration balloons. During a 100-day circumtropical flight, the instrument collected over 100 two-kilometer profiles of temperature, water vapor, clouds and aerosol at one-meter resolution, yielding unprecedented geographic sampling and vertical resolution measurements of the tropical tropopause layer.