Update of stratospheric temperature interannual variability and trends from space

sounders and ground-based lidars observations.

Alain Hauchecorne1, Philippe Keckhut1, Chantal Claud2, Beatriz Funatsu2,3, Sergey Khaykin1, Guillaume

Angot1, Pauline Maury2

(1) LATMOS/IPSL, UVSQ, UPMC, CNRS, Guyancourt, France

(2) LMD/IPSL, Ecole Polytechnique, ENS, UMC, CNRS (3) LETG-Rennes-COSTEL, Université de Rennes, CNRS

IPCC-AR5 2014

AMSU data Advanced Microwave Sounding Unit On board NOAA, AQUA and MetOp satellites since 1998

NDACC Rayleigh lidar data • Observatoire de Haute-Provence,

OHP, 44N, 6E • Table Mountain, TMF, 34N, 118 • Mauna Loa, MLO, 19N, 156W

Les cookies assurent le bon fonctionnement de nos services. En utilisant ces derniers, vousacceptez l'utilisation des cookies.

En savoir plus OK

Page 2

Page 3

377 × 271 ­ sat.ltu.se

Web Images Vidéos Actualités Maps Outils de recherchePlus SafeSearch

amsu Connexion

SSU Stratospheric Sounding Unit 1979-2006

ARISE 1 (2012-2014)

ARISE 2 (2015-2018)

Atmospheric dynamics Research InfraStructure in Europe Infrastructure Design Study funded by FP7 and H2020 programs, coord. Elisabeth Blanc, CEA

Project objective: Better understanding of the dynamics

of the troposphere-stratosphere-mesosphere exchanges

including contribution of gravity waves (GW) and planetary waves (PW).

Validation of ECMWF operational data at OHP Le Pichon et al., 2015

Impact of the 11-year solar cycle Li et al., 2011

MLO TMF OHP

January 2013 stratospheric warming

SSW

cooling

warming

Figure 1. Combined time series of GW Ep from Rayleigh lidar at OHP (44° N, 6° E) and

COSMIC (5° × 5° domain centered at OHP). White areas represent the missing data. a) Monthly-

mean Ep (color map) and zonal wind (solid contours - westerly winds of 30 and 80 m/s, dotted

contour - zero wind, dashed contour - easterly wind of 10 m/s). b) Weekly means of Ep from

COSMIC and lidar (color map) and monthly means of MERRA Ep (gray-scaled contours, denoting

0.2, 0.3, 0.5, 1, 2, 4, 6 uni ts of J kg-1

).

Figure 2. Same as Fig. 1b for the period October 2012 – April 2013.

a)

b)

Gravity wave potential energy lidar + COSMIC-RO

SSW

950 K

475 K

Infrasound signal

OHP Rayleigh lidar profile

Acc

epte

d A

rtic

le

Figure 10: COSMIC CPT temperature anomalies averaged over January 2008,

January 2010 and January 2013.

This article is protected by copyright. All rights reserved.

Evan et al., 2015 Tropical Temp anomaly

OHP

TMF

MLO

Rayleigh lidar vs AMSU temperature trend

Full period

Since 2012

MLO TMF OHP

Stratospheric temperature trend AMSU 2002-2014

Tropical stratospheric trend COSMIC –RO 2006-2014

Conclusion

• The analysis of recent AMSU data indicates that the cooling in the stratosphere is still going on

• These results are also supported by the analysis of NDACC Rayleigh lidar data and the preliminary analysis of RO COSMIC data

• The full understanding of the evolution of the stratospheric temperature requires to take into account the role of the dynamics in the troposphere-stratosphere coupling (atmospheric waves, sudden stratospheric warmings, Brewer-Dobson circulation, ….), which is part of the objectives of ARISE