Title :

Batal the balloon measurement campaigns of the asian tropopause aerosol layer

Author(s) :

Vernier, J. -P. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Fairlie, T. D. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Deshler, T. [Auteur]
University of Wyoming [UW]
Ratnam, M. Venkat [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Gadhavi, H. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Kumar, B. S. [Auteur]
Tata Institute for Fundamental Research [TIFR]
Natarajan, M. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Pandit, A. K. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Raj, S. T. Akhil [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Kumar, A. Hemanth [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Jayaraman, A. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Singh, A. K. [Auteur]
Banaras Hindu University [Varanasi, India] [BHU]
Rastogi, N. [Auteur]
Physical Research Laboratory [Ahmedabad] [PRL]
Sinha, P. R. [Auteur]
Tata Institute of Fundamental Research [Bangalore]
Kumar, S. [Auteur]
Banaras Hindu University [Varanasi, India] [BHU]
Tiwari, S. [Auteur]
Banaras Hindu University [Varanasi, India] [BHU]
Wegner, T. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Baker, N. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Vignelles, D. [Auteur]
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
Stenchikov, G. [Auteur]
King Abdullah University of Science and Technology [Saudi Arabia] [KAUST]
Shevchenko, I. [Auteur]
King Abdullah University of Science and Technology [Saudi Arabia] [KAUST]
Smith, J. [Auteur]
Bedka, K. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Kesarkar, A. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Singh, V. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Bhate, J. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Ravikiran, V. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Rao, M. Durga [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Ravindrababu, S. [Auteur]
National Atmospheric Research Laboratory [Tirupati] [NARL]
Patel, A. [Auteur]
Physical Research Laboratory [Ahmedabad] [PRL]
Vernier, H. [Auteur]
Virginia Institute of Marine Science [VIMS]
Wienhold, F. G. [Auteur]
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
Liu, H. [Auteur]
National Institute of Aerospace [Hampton] [NIA]
Knepp, T. N. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Thomason, L. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Ziemba, L. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Moore, J. [Auteur]
NASA Langley Research Center [Hampton] [LaRC]
Crumeyrolle, Suzanne [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Williamson, M. [Auteur]
Berthet, Gwenael [Auteur]
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
Jegou, Fabrice [Auteur]
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]
Renard, J. -B. [Auteur]
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace [LPC2E]

Journal title :

Bulletin of the American Meteorological Society

Abbreviated title :

Bull. Amer. Meteorol. Soc.

Volume number :

99

Publication date :

2018-05-01

ISSN :

0003-0007

HAL domain(s) :

Physique [physics]

English abstract : [en]

We describe and show results from a series of field campaigns using balloon-borne instruments launched from India and Saudi Arabia during the summers 2014-2017 to study the nature, formation and impacts of the Asian ...
Show more >We describe and show results from a series of field campaigns using balloon-borne instruments launched from India and Saudi Arabia during the summers 2014-2017 to study the nature, formation and impacts of the Asian Tropopause Aerosol Layer (ATAL). The campaign goals were to i) characterize the optical, physical and chemical properties of the ATAL, ii) assess its impacts on water vapor and ozone, and iii) understand the role of convection in its formation. In order to address these objectives, we launched 68 balloons from 4 locations, one in Saudi-Arabia and 3 in India, with payload weights ranging from 1.5 kg to 50 kg. We measured meteorological parameters, ozone, water vapor, and aerosol backscatter, concentration, volatility and composition in the Upper Troposphere and Lower Stratosphere (UTLS) region. We found peaks in aerosol concentrations of up to 25 part/cm3 for radius > 75 nm, associated with Scattering Ratio at 940 nm of ~1.9 near the cold point tropopause. During medium-duration balloon flights near the tropopause, we collected aerosols and found, after offline ion chromatography analysis, the dominant presence of nitrate ions with a concentration of about 100 ng/m3. Deep convection was found to influence aerosol loadings 1 km above the cold point tropopause. The BATAL project will continue for the next 3-4 years and the results gathered will be used to formulate a future NASA-ISRO airborne campaign with NASA high altitude aircraft.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Université de Lille

Collections :

• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Submission date :

2024-01-30T11:45:39Z
2024-02-26T10:08:44Z