Centro de Investigaciones en Láseres y Aplicaciones

(LASER RESEARCH CENTER AND APPLICATIONS ) (CITEFA-CONICET)

Buenos Aires - Argentina

Collaboration between CEILAP, LATMOS-IPSL and JICA

Province of Santa Cruz, Argentine Patagonia.

Lat: 51º 36’ S, Lon: 69º 19’ W.

Military Air Force Base, Río Gallegos - Fuerza Aérea Argentina (FFAA)

Río Gallegos Site (CEILAP-RG)

Little History of RG Site Events

2004Jun 2005Aug 2005-Dec 2006Sep 2007

DIAL Ozo

ne In

stru

men

t

Ready

to m

easu

re

Tran

spor

tatio

n

Of Ins

trum

ent

to

Rio G

alle

gos

Site

SOLA

R Cam

paig

nSt

art w

ith

UVO3P

atag

onia

Proj

ect

Dec 2008Ad

mission

of D

IAL

Ozone

Inst

. To

NDACC

Networ

k

Firs

t Ozo

ne S

onde

Campa

ign

in R

ío G

alle

gos

Mar 2010

Argentina – Chile collaboration3 sondes launched in Río Gallegos site, collocated withDIAL during first week of March

Time Evolution of Total Ozone in Río Gallegos (2009)

Study case 1(October 3 and 4)

Prolonged O3 Reduction Extreme Event (November 2009)

Study Case 1 of Ozone Hole overpass in RG Site during 2009

OMI/AURA

Oct 22009

Oct 42009

Oct 62009

New Capability of Temperature Lidar Profile in RG SiteComparison Lidar with HIRDLS/AURA-NASA

Mean ± 1σ dev HIRDLS

Error bars are plus and minus 1σ dev

ΔS < 500 Km

ΔT ± 12 Hs

N = 94 Measurements

Temperature Profiles Without Correction by Aerosols using Lidar Rayleigh

Temperature Profiles With Correction by Aerosols using Lidar Rayleigh

1 Km Resolution HIRDLS

UVI & partial ozone loss column changes

Regions of potential UV enhancements linked to vortex occurrences in a cloudiness diminution

scenario

October (no cloud discrimination)Vortex

occurrencesTOC changes

Vortex occurrences

TOC changes

UVI changes

Regions R1 & R6, the most affected by vortex occurrences & polar ozone loss

Maximum UV increase are observed in region R1 due to low cloud clover conditions

If changes in cloud clover, R6 is the most sensitive region

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October (quasi-clear sky)

[40°S-60°S] latitude band

Polar region: Antarctica

Evolution of chemical ozone loss over Antarctica since 1980

Increased variability since 2000

2002 2004

1st major warming observed over Antarctica: split of the polar vortex and the ozone hole

spring 2002

2006

Perspectives

Monitoring of atmospheric composition at Rio Gallegos (ozone, aerosol, UV, temperature) Very few measurement stations in the SH for long term

trend studies and cross-validation of satellite time series Network for the Detection of Atmospheric Composition

Changes (NDACC) southern mid-latitudes stations: Lauder (NZ) and Rio Gallegos (Argentina)

More instruments are being implemented (microwave radiometer, U. Nagoya)

Study of the recovery of the Antarctic ozone hole in relation with climate change