Stratéole 2
Investigating the Tropical Tropopause Layer using Instruments Deployed on Long Duration Balloons
Long duration balloon ready for release Seychelles
long duration
                balloon around the world

Stratéole 2:  White Paper    Data Policy    Flight Configuration and Instruments 
Time line:
March 2018: Delivery of instruments to Toulouse.
October - December 2018: Five test flights, one with each the five scientific instrument gondolas.
November 2020 - February 2021: Twenty science flights.
                                       Ten flights at the top of
the tropical tropopause layer for the three in situ gondola configurations.
                                       Ten flights in the lower stratosphere for the remote sensing gondolas.

Laboratoire de Métérologie Dynamique (LMD), Paris, France
Centre National d'Etudes Spatiales (CNES), Toulouse, France
National Science Foundation (NSF), Arlington, Virginia, United States      
Laboratory for Atmospheric and Space Physics (LASP), Boulder, Colorado, United States
Scripps Institute of Oceanography (SIO), La Jolla, California, United States
European Investigations
Fine scale measurement of winds, temperature,pressure, LMD, PI: Albert Hertzog
In situ measurements of upwelling infrared flux, CNRS-LATMOS, PI: Alain Hauchercorne
In situ measurements at flight level of water vapor and ozone, LMD, GMSA, PIs: Albert Hertzog, Georges Durry
In situ measurements at flight level of aerosol particles, CNRS-LPC2E, PI: Baptiste Renard
Nadir cloud detection using lidar, CNRS-LATMOS/CNR, Albert Hertzog, France; Federico Fierli, Italy

 US Investigations
     Investigating thermal structure, dynamics, and dehydration in the tropical tropopause layer with fiber optic temperature profiling from stratéole 2 balloons, LASP CU, PI: Lars Kalnajs, CoI: Joan Alexander.
    Tropical waves and their effects on circulation from 3D GPS radio occultation sampling from stratospheric balloons in Strateole-2, SIO, PI: Jennifer Haase, CoI: Joan Alexander. Radio Occultation.
    Investigating water vapor, clouds, and aerosol in the tropical tropopause layer with in situ and profiling measurements from long duration Strateole-2 balloons, LASP CU, PI: Terry Deshler, CoIs: Sean Davis, Lars Kalnajs