elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Small-Scale Wind Fluctuations in the Tropical Tropopause Layer from Aircraft Measurements: Occurrence, Nature, and Impact on Vertical Mixing

Podglajen, Aurelien and Bui, T. Paul and Dean-Day, Jonathan M. and Pfister, Leonhard and Jensen, Eric J. and Alexander, M. Joan and Hertzog, Albert and Kärcher, Bernd and Ploungonven, Riwal and Randel, William J. (2017) Small-Scale Wind Fluctuations in the Tropical Tropopause Layer from Aircraft Measurements: Occurrence, Nature, and Impact on Vertical Mixing. Journal of the Atmospheric Sciences, 74 (22), pp. 3847-3869. American Meteorological Society. doi: 10.1175/JAS-D-17-0010.1. ISSN 0022-4928.

[img] PDF - Only accessible within DLR - Published version
9MB

Official URL: https://journals.ametsoc.org/doi/10.1175/JAS-D-17-0010.1

Abstract

The contribution of turbulent mixing to heat and tracer transport in the tropical tropopause layer (TTL) is poorly constrained, partly owing to a lack of direct observations. Here, the authors use high-resolution (20 Hz) airborne measurements to study the occurrence and properties of small-scale (,100 m) wind fluctuations in the TTL (14–19 km) over the tropical Pacific. The fluctuations are highly intermittent and appear localized within shallow (100 m) patches. Furthermore, active turbulent events are more frequent at low altitude, near deep convection, and within layers of low gradient Richardson number. A case study emphasizes the link between the turbulent events and the occurrence of inertio-gravity waves having small horizontal or vertical scale.

Item URL in elib:https://elib.dlr.de/118741/
Document Type:Article
Title:Small-Scale Wind Fluctuations in the Tropical Tropopause Layer from Aircraft Measurements: Occurrence, Nature, and Impact on Vertical Mixing
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Podglajen, AurelienCNRS-UMR, Universite Pierre et Marie Curie, Paris, FUNSPECIFIEDUNSPECIFIED
Bui, T. PaulNASA, Moffett Field, CA, USAUNSPECIFIEDUNSPECIFIED
Dean-Day, Jonathan M.NASA, Moffett Field, CA, USAUNSPECIFIEDUNSPECIFIED
Pfister, LeonhardNASA, Moffett Field, CA, USAUNSPECIFIEDUNSPECIFIED
Jensen, Eric J.NASA, Moffett Field, CA, USAUNSPECIFIEDUNSPECIFIED
Alexander, M. JoanCoRA Office, NorthWest Research Associates, Boulder, ColoradoUNSPECIFIEDUNSPECIFIED
Hertzog, AlbertUPMC University Paris 06, CNRS, Palaiseau, FranceUNSPECIFIEDUNSPECIFIED
Kärcher, BerndDLR, IPAhttps://orcid.org/0000-0003-0278-4980UNSPECIFIED
Ploungonven, RiwalLab. de Météorologie Dynamique/IPSL, Paris-Saclay University, Palaiseau, FranceUNSPECIFIEDUNSPECIFIED
Randel, William J.National Center for Atmospheric Research, Boulder, CO, USAUNSPECIFIEDUNSPECIFIED
Date:17 November 2017
Journal or Publication Title:Journal of the Atmospheric Sciences
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:74
DOI:10.1175/JAS-D-17-0010.1
Page Range:pp. 3847-3869
Publisher:American Meteorological Society
ISSN:0022-4928
Status:Published
Keywords:turbulence, Tropical Tropopause, cirrus
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Kärcher, Prof. Bernd
Deposited On:11 Nov 2019 14:39
Last Modified:26 May 2020 22:47

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.