Planetary-scale tropopause folds in the southern subtropics

J. L. Baray; V. Daniel; G. Ancellet; B. Legras

doi:10.1029/1999GL010788

Planetary-scale tropopause folds in the southern subtropics

J. L. Baray
, V. Daniel
, G. Ancellet
, B. Legras

Université de La Réunion

Research output: Contribution to journal › Article › peer-review

Abstract

Daily measurements of tropospheric ozone at La Reunion Island (55 E, 21 S) in July 1998 show that ozone layers are quasi-permanent in the troposphere between 6 and 10 km with values reaching 80 to 100 ppbv. Meridional cross sections of potential vorticity reveal that these layers are related to tropopause folds beneath the subtropical jet. Folding is persistent and extends over a considerable longitude range from mid-Atlantic to mid-Pacific. We suggest that this structure is due to the convergent flow associated to the descent branch of the Hadley circulation during austral winter.

Original language	English
Pages (from-to)	353-356
Number of pages	4
Journal	Geophysical Research Letters
Volume	27
Issue number	3
DOIs	https://doi.org/10.1029/1999GL010788
Publication status	Published - 1 Feb 2000
Externally published	Yes

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10.1029/1999GL010788

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title = "Planetary-scale tropopause folds in the southern subtropics",

abstract = "Daily measurements of tropospheric ozone at La Reunion Island (55 E, 21 S) in July 1998 show that ozone layers are quasi-permanent in the troposphere between 6 and 10 km with values reaching 80 to 100 ppbv. Meridional cross sections of potential vorticity reveal that these layers are related to tropopause folds beneath the subtropical jet. Folding is persistent and extends over a considerable longitude range from mid-Atlantic to mid-Pacific. We suggest that this structure is due to the convergent flow associated to the descent branch of the Hadley circulation during austral winter.",

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T1 - Planetary-scale tropopause folds in the southern subtropics

AU - Baray, J. L.

AU - Daniel, V.

AU - Ancellet, G.

AU - Legras, B.

PY - 2000/2/1

Y1 - 2000/2/1

N2 - Daily measurements of tropospheric ozone at La Reunion Island (55 E, 21 S) in July 1998 show that ozone layers are quasi-permanent in the troposphere between 6 and 10 km with values reaching 80 to 100 ppbv. Meridional cross sections of potential vorticity reveal that these layers are related to tropopause folds beneath the subtropical jet. Folding is persistent and extends over a considerable longitude range from mid-Atlantic to mid-Pacific. We suggest that this structure is due to the convergent flow associated to the descent branch of the Hadley circulation during austral winter.

AB - Daily measurements of tropospheric ozone at La Reunion Island (55 E, 21 S) in July 1998 show that ozone layers are quasi-permanent in the troposphere between 6 and 10 km with values reaching 80 to 100 ppbv. Meridional cross sections of potential vorticity reveal that these layers are related to tropopause folds beneath the subtropical jet. Folding is persistent and extends over a considerable longitude range from mid-Atlantic to mid-Pacific. We suggest that this structure is due to the convergent flow associated to the descent branch of the Hadley circulation during austral winter.

U2 - 10.1029/1999GL010788

DO - 10.1029/1999GL010788

M3 - Article

AN - SCOPUS:0034353476

SN - 0094-8276

VL - 27

SP - 353

EP - 356

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 3

ER -

Planetary-scale tropopause folds in the southern subtropics

Abstract

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