estec 11-13 march 2004 cost action #723 wg2 overview “an assimilated ozone and humidity dataset”...

ESTEC 11-13 March 2004

COST Action #723

WG2 OVERVIEW “An assimilated Ozone and

Humidity Dataset”

W.A. LahozDARC, Reading, UK

http://darc.nerc.ac.uk

Thanks to Alan Geer & Dominique Fonteyn


COST Action #723

• Aims• Participants• Workplan• Deliverables• Timetable

• Research themes• Future work

COST Action plan

Topics

COST workshop & WG2 presentations


COST Action #723

• Algorithms to assimilate UTLS datasets into troposphere/stratosphere GCMs & CTMs Build on theory Retrieval/forward model algorithms -> radiance assimilation Synergy (limb/nadir, different tools, chemistry/dynamics,…) Apply to NWP, chemical forecasting systems

• QC-datasets of UTLS O3 & H2O for use by scientific community cal-val (e.g. Envisat,…)

Use algorithms & QC-datasets -> (co-operation) ->• Assess state of UTLS & “understand” processes, using data

(analyses, …)• Information -> comprehensive analysis of anthropogenic impact

on UTLS region

Aims


COST Action #723Statistics are a global mean at 10hPa

Ozone monitoring statistics at 10hPa in DARC assimilation

Analysis

O-B Residuals

Number of accepted

observations

Observations

Background

Cal-val: MIPAS


COST Action #723

MIPAS ozone O-B22 –29 Sep 2002

global mean

Gaussian curve

bias

Gaussian errors


COST Action #723

Nadir/limb synergy (see Struthers et al. JGR 2002)

•Assimilation of MLS ozone (limb) & GOME total ozone (nadir)

•Ozone analyses using both geometries are objectively “better” (more consistent with a BLUE) than those using just one or other of the geometries

-> apply to Envisat

Synergy


COST Action #723

Global map of ozone column amount 21 April 1997 12 GMTMLS ozone profile + GOME column ozone

(Dobson units: red high, blue low)

9-10 September 2002 COST Action #723

Synergy of Envisat data

Ozone distributionin space + time(+more species)

Limb geometry:Height resolved

information

Nadir geometry:Constraint on total

information

Partition information betweentroposphere and stratosphere

Atmosphere

Atmosphere

Envisat

Envisat

hν

hν

MIPAS (limb), SCIAMACHY (limb), GOMOS (occultation)

SCIAMACHY (nadir)


COST Action #723

The SH polar vortex split of Sep 2002

MIPAS ozone

DARC analyses

Blue: low ozone; Red: high ozone; 10 hPa

CourtesyAlan Geer

Filling in gaps in knowledge


COST Action #723

O3 evolution 31.5hPa;22 Sep -> 25 Sep 2002ACRI GOMOS analysesRed (high), blue (low)

Synergy: different tools


COST Action #723

COST WG2

N2O from ODIN/SMR

Assimilated into MSDOL

55 hPa Sep 2002 SH

Laaziz EL Amraoui &

Philippe Ricaud

Obs. Bordeaux

Synergy: different tools


COST Action #723

Ozone 475K ClOx = ClO+2*Cl2O2 475K

24 Sep 2002 12UTC: Ozone photochemistryBIRA-IASB MIPAS analyses: red (high), blue (low)

unobserved

Synergy: different tools & unobserved species


COST Action #723

Assimilated and measured ozone profiles over Lerwick

GOME

CourtesyKNMI

Better agreementwith profileassimilation

Algorithms


COST Action #723

GOME Total ozone assimilated 7-yr dataset:

GOA

www.knmi.nl/goa

Henk Eskes &

Arjo Segers

KNMI

QC-dataset


COST Action #723

ASSET partners (NWP systems, sophisticated photochemical models, retrievals, data dissemination) -> links with theory & instrument teams

Lab studies / atmospheric photochemistry (J. Heyrovský, IPC, Ac. Sciences Czech Rep., Prague & Obs. Aquitain des Sciences de l’Univers, Lab. d’Astrodynamique, d’Astronomie et d’Aéronomie, Bordeaux)

More…

COST action a basis for co-operation: meetings, workshops, visits, summer schools,…

Co-operation


COST Action #723

• Studies of Sep SH 2002 & other periods (e.g. for cal-val of Envisat data)

• Assimilation of MIPAS & ODIN (ongoing), GOMOS (started), SCIAMACHY,…

• H2O QC-datasets• Radiance assimilation• Studies with data from future missions (Eos Aura,…)

-> Co-operation between all actors: instrument teams, theory, NWP, modellers, DA, EO…

Encourage groups to use Short-Term Scientific Mission (STSM) funds for visits

-> Basis to consolidate group members & workplan

Future


COST Action #723

Material for WG2 discussion on Friday


COST Action #723

• DARC, University of Reading, UK (W. Lahoz)• KNMI, The Netherlands (P. Siegmund, H.

Kelder)• U. Köln, Germany (H. Elbern)• Bordeaux Observatory, France (J. Urban, P.

Ricaud)• CNR, Rome, Italy (F. Fierli)• Academy of Sciences, Czech Republic (Z.

Zelinger)• Others (ASSET partners & associates,…)

Group members


COST Action #723

• Algorithms to assimilate research satellite data in UTLS (retrievals/forward models; radiance assimilation)

• Assimilation of L2 data (T, O3, H2O,…) into GCMs & CTMs

• Evaluation of models & observations (assimilation,…)

• Evaluation of key parameters in UTLS

• Synergy: limb/nadir geometries, chemistry/dynamics,…

• QC-datasets (+metadata) in UTLS (T, O3, H2O)

• Deliverables (algorithms, QC-datasets, reports,…)

Workplan


COST Action #723

• Algorithms to assimilate data into GCMs & CTMs

• Report/evaluation on UTLS assimilated datasets

• Report on UTLS: (i) dynamics, (ii) chemistry, & (iii) climate • Report on synergies: nadir/limb,…

• QC-datasets (+metadata) in UTLS (T, O3, H2O)

• Report on assimilation of limb radiances into GCMs & CTMs

Deliverables


COST Action #723

• Summary progress reports for WG2 (Months 12, 24, 36, 48)

• Report of algorithms (Month 48)

• Quality –controlled datasets (Month 48)

• Preliminary studies on radiances (Month 48)

Timetable

estec 11-13 march 2004 cost action #723 wg2 overview “an assimilated ozone and humidity dataset”...

Documents