Aura Validation Meeting Report

1
Aura Validation Meeting
Report

• Main Goals
• To ensure that geophysical science data products
  have advertised and characterized accuracy and
  precision over the mission lifetime
• To combine Aura observations with
  science/campaign activities
• Approach
  
  gt Aura Validation Working Group
  (AVWG) and instrument validation representatives
  Aura Project have guided prioritization of
  products and campaign aspects related to
  validation
  gt Aura
  Validation Data Center (AVDC) at GSFC, now open
• http//avdc.gsfc.nasa.gov , contact
  Bojan Bojkov
  
  
  
  gt Aura
  Liaisons interface between Aura, val. data
  providers AVDC gt NASA HQ and
  international agencies (NRA, AO)
• Aura Documents 2001 Plan, 2004 Update, 2004 Val.
  Datasets Guide.
• Post-launch
• Campaigns Balloon/Ft. Sumner 04, AVE
  Houston 04, PAVE 05
• Balloon/Kiruna
  March 05, launch mishap
• Future plans
  depend on funding - not as large as expected
• Validation working group includes most of
  the Aura instrument science teams
  expanding rapidly to include more
  scientists providing validation correlative
  data some modeling efforts
  
• ? Will need several days for next, more
  leisurely, validation meeting
• need more validation subgroups leaders

2

3
Top Level Needs and Priorities
(1) If large volcanic eruption occurs (into
stratosphere) LS Lowermost Stratosphere ,
UT Upper Troposphere.
? Important aspects other satellites, grd-based
data, campaigns (aircraft/balloon), models.


gt Tropics Sondes
(O3 and H2O), CO, and related datasets

gt High latitudes Stratospheric
profiles and horizontal gradients (in/out of
polar vortex)
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Aura Validation Meeting Report
Aura Instrument Teams

Points of contact

lucien_at_mls.jpl.nasa.gov (Lucien
Froidevaux - MLS)
dkin_at_ucar.edu (Doug Kinnison HIRDLS)
Mark.Kroon_at_knmi.nl (Mark Kroon
OMI / The Netherlands) Richard.D.McPeters_at_n
asa.gov (Rich McPeters OMI / U.S.A.)
Stanley.P.Sander_at_jpl.nasa.gov (Stan Sander
TES)

• Aura Validation Data Center (Bojan.Bojkov_at_nasa.go
  v)
• - To host/distribute validation correlative
  data, in common HDF file formats
• - Now mirroring or pointing to other data
  repositories (satellites, campaigns)
• - Campaign planning, FOV predictions
• - Aura data subsets
• Current Top Priorities
• Ground-based data
• - Brewer/Dobson, O3 sondes, H2O sondes, NDSC
  data
• Need reasonable subset of these for next
  meeting - by June.
• Requires conversion program (ASCII or Ames to
  HDF),
• distribution to data providers, and return of
  formatted files to AVDC ASAP
• Liaisons should help Bojan Bojkov in making
  this data transfer happen faster.

5
Aura Validation Meeting
Report
Calibration, Spectroscopy

Ground-based Data
Long-term
Aircraft Balloon Campaigns
Core Validation
Validation
Satellite Data
Models
Algorithms, Assimilation
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Aura Validation Meeting
Report

• AGENDA AVWG, March 1, 2005, Pasadena
• Introduction Froidevaux/Douglass
• AVDC Status/Plans Bojkov
• ENVISAT Update Hilsenrath
• Aura Product Validation (satellites,
  ground/sondes, balloons, AVE 04, PAVE 05)
• General Kinnison, Jucks, Fahey, Kleinboehl
• Level 1 Revercomb
• Temperature Schwartz, Eldering
• O3 Profiles Wang/Cunnold, Froidevaux, Logan,
  Li, Thompson, Schmidlin , Filipiak, Worden
• O3 Columns Flynn, Osterman, Labow,
  Petropavlovskikh, Kroon, McPeters
• H2O Jimenez, Read, Eldering, Voemel, Herman
  
• CO Filipiak, Logan, Luo, Jost
• N2O Livesey
• HCl Froidevaux
• OH Pickett
• NO2 Columns Kroon

7
Aura Validation Meeting
Report HCl

MLS, HALOE, ACE
MLS tracks latitudinal variation of HALOE data
well, but with an offset of 10-40, depending on
altitude (or by about 0.3 ppbv). HALOE looks low
compared to ACE data as well ACE agrees well
with MLS. HALOE was on low side by 10-15
versus correlative data (JGR, 1996), so this may
not be surprising but is easier to show, given
the statistics.
8
Aura Validation Meeting
Report HCl
Campaigns with HCl data Ft. Sumner, Sep. 2004 -
MLS HCl appears to be in good agreement with
remote data from FIRS-2 and Mark IV. Also seems
consistent with ALIAS data from Sep. 17. Need to
look at error bars in a bit more detail also
need to use Sep. 17, not Sep. 16 was not
reprocessed. R. Salawitch has also looked at HCl
vs tracer (MLS and HALOE) ? MLS gt HALOE AVE
Oct./Nov. 2004, WB-57 CIMS HCl Just 1 day
compared so far. Looks reasonably close, given
error bars, for 70-100 hPa. Some indication of
low (or negative) bias in MLS HCl at 150 hPa. MLS
HCl recommended height range 100 to
0.2 hPa. Plans More of the same validation
efforts to come, including with HALOE, ACE, and
ASUR/PAVE .
FIRS-2, Sep. 23 (day), 24
(night) MkIV, Sep. 23 (sunset) ALIASin situ, Sep.
17 (day) MLS, Sep. 23 (day)

9
Aura Validation Meeting, Pasadena
March 1, 2005
L. Froidevaux et al.
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• Future Plans Aura Validation Meeting, Sep. 19-23
  ( days TBD)
  
  
• NEW SUBGROUPS (and Leaders) will be the approach
  for next meeting
• Aura Product Validation (satellites,
  ground/sondes, balloons, campaigns, models)
• First thoughts (not final)
• - Temperature
• - H2O
• - CO
• - O3 Profiles , stratospheric column
• - O3 Total column, trop. column
• - Tracers N2O, CH4, CFCs, HCN
• - HNO3
• - BrO, BrO column, OH, HO2, NO2 (includes
  columns), HCHO column (?)
• - HCl, ClO, ClONO2, HOCl, OClO col.
• Aerosols/Clouds, SO2
  S. Massie

1 whole day on ozone
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Aura and Related Campaigns Timeline
Core Validation Phase
Commissioning Phase
Aura Launch
M H MM
H M Low,
Mid, High latitude
Balloon launches (tentative) (non-NASA-led
underlined)
M
04
05
06
07
08
INTEX-NA-W
INTEX-NA-E
AVE
TC4 winter
TCSP/CAMEX
Pre-AVE
AVE
AVE
AVE
TC4 / AVE
SOWER (Soundings of Ozone and Water in the
Equatorial Region)
Mini-missions
Joint campaigns
Jan. 04 pre-AVE (base Ellington/Texas Costa
Rica) Jul. 04 INTEX-NA-E Oct. 04 AVE
(Ellington) (Radiance validation comp. data
WB-57) Jan. 05 PAVE polar Jul. 05
TCSP/AVE/CAMEX ?summer (Costa Rica ?, H2O,trace
gases) Jan. 06 TC4 /AVE (Darwin) DOE
(H2O, trace gases in TWP) Apr. 06 INTEX-NA-W /
AVE Sep. 06 AVE (Ellington or Dryden) Jan. 07
TC4 winter (Guam) (H2O, trace gases in TWP)
2007 AVE UAV TBD (earlier UAV plans also,
as available)
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Validation
subgroups/teams
How to best organize in subgroups? - Product
specific seems to make sense but more than 1
product may also (?) gt More than 1 team
already have individuals associated with 1
product (or more) - Should troposphere and
stratosphere be separated (in different
subgroups)? Common products and individual names
(strawman) may want to add liaison names
T O3 H2O
CO HNO3 N2O CH4 NO2
Aerosols Clouds Trop. HIRDLS
Lee Nardi Lyjak
Kinnison Khosravi MLS Schwartz
Filipiak Read Filipiak
Wu TES
OMI McPeters/Brinksma

Brinksma Torres deHaan Strat. HIRD
LS Lee Nardi Lyjak
Kinnison Khosravi MLS Schwartz
Froidevaux Pumphrey Filipiak Santee
Livesey
Wu TES OMI
Brinksma