Report to WGCV-23- Atmospheric Chemistry Subgrou

Report to WGCV-23- Atmospheric Chemistry Subgroup (ACSG) : Report to WGCV-23 - Atmospheric Chemistry Subgroup (ACSG) Ernest Hilsenrath NASA Goddard Space Flight Center March 7-10, 2005 Cordoba, Argentina

ACSG Goals : ACSG Goals Insure accurate and traceable calibration of remotely sensed atmospheric chemistry radiance data and validation of higher level products, for application to atmospheric chemistry and climate research, from Earth Observing satellite missions.   Support the calibration/validation recommendations of WMO/CEOS #140. 19 instruments on 10 missions for observing atmospheric chemistry will be flown by 2015.  

Atmospheric Chemistry Satellite Timeline (19 instruments, 10 Missions 2015) : In orbit TOMS SBUV/2 SAGE II, III OSIRIS ACE MAESTRO GOME-1 GOMOS MIPAS SCIAMACHY MOPITT HIRDLS/Aura 2004 OMI/Aura “ MLS/Aura “ TES/Aura “ To be launched OMPS/NPP/NPOES 2007-2015 GOME-2/Eumetsat 2006-2015 New chemistry TBD Atmospheric Chemistry Satellite Timeline (19 instruments, 10 Missions 2015)

ACSG Objectives-1 : ACSG Objectives-1 Promote international collaboration and technical exchange to ensure sufficient use and maintenance of calibration/validation resources required for atmospheric chemistry missions.   Verify accurate scientific products encouraging an end-to-end approach to the calibration and validation of Level 1 and Level 2 data products and subsequent re-calibration and reprocessing. Ensure that validation sensors are calibrated to traceable national standards with documented statements of accuracy and repeatability Encourage interaction between calibration scientists and data users to enable a better understanding of data uncertainties and user requirements.    

ACSG Objectives-2 : ACSG Objectives-2 Develop comprehensive data validation methods that employ ground, aircraft, balloon, and satellite measurements and data assimilation with chemical transport models. Recommend a network of validation sites and to encourage continuous observation and quality control of data through the use of standard procedures and inter-comparisons.   Specify a comprehensive, consistent and quality- controlled multi-mission validation data base in an accepted format employing user friendly tools.

ACSG - Status : ACSG - Status Participants (15 members): CNES, DLR, ESA, NASDA, NASA, KNMI, MSC, NOAA, IASB, EC, WMO, U. of Bremen, CSA (U of Tronto), Three new members: Eumetsat, British National Space Center (BNSC), WMO (Atmospheric Env. Program) Meetings: Four Subgroup meetings held: May ’02 (Ottawa), December ’02 (Frascati), July ‘03 (Toulouse), May ‘04 (Frascati) ACSG Projects Approved and Action Items closed: Collaboration between Aura and Envisat Validation Data Centers (Approved) Ground station cross calibration (Approved) Eureka (Canada) station re-opened (Approved) Collaboration on future missions: Metop, NPP, NPOESS, (Beginning)

ACSG Activities : ACSG Activities Envisat validation Envisat ACVT Workshop Upcoming plans Aura launch and validation program Aura validation NRA released, proposals under evaluation ESA/OMI AO selection in final stages Aura Validation Data Center Two aircraft (B57, DC8) missions conducted IGOS/IGACO Report Operational Metop and NPOESS ozone instrument cal/val requirements Chinese BUV ozone instrument?

Envisat Validation : Envisat Validation ESA Coordinated: Ground, aircraft, and balloon, main phase complete Additional balloon campaign planned this summer Slow start for chemistry instruments, but nominally successful Two ESA sponsored Validation Workshop Frascati, IT Dec 2002 May 2004 Two of Envisat’s Three chemistry instruments are no longer operational – impact on Aura?

EOS Aura – Atmospheric Chemistry : EOS Aura – Atmospheric Chemistry Third large EOS Observatory following Terra and Aqua Four instruments (UV to microwave) Polar orbit at 1:38 PM crossing Launch – July 15, 2004 Science Objectives Tracking ozone layer Global measurements of air quality Connecting atmospheric chemistry with climate Synergy with A-Train OMI TES HIRLDS MLS

Aura “First Light” : Aura “First Light” OMI tropospheric NO2

Aura Validation Program : Aura Validation Program Nine Aircraft field Campaigns - 2007 Three major tropical UT/LS campaigns (TC4) One tropospheric campaigns (Intex -B) Polar mini-campaign Frequent mini-aircraft missions (AVE) Targets different environments and seasons to exercise the algorithms UAV component Ground based measurements and possible mobile trailer system for in situ and profile measurements focused on the troposphere Special high altitude instrumented balloon flights Additional H2O and O3 sondes Aura Validation Data Center (AVDC) for inter-satellite data hosting and mission planning Collaboration: NASA Research Announcement and ESA AO

Preliminary Validation Results : Preliminary Validation Results TES B C

Aura Validation Data Center : Aura Validation Data Center Archive and distribution center for ground, balloon, aircraft, and some satellite data for Aura validation Collaborative effort with ESA-ESRIN Envisat Cal/Val and the Canadian ACE mission (data exchange) AVDC operational (February 10, 2005) Web access only: http://avdc.gsfc.nasa.gov Access restrictions: AVDC data protocol As of March 4: 62 registered users 85+ Gb of data

AVDC Functionality : AVDC Functionality Continuity in file format: AVDC/Envisat HDF Numerous tools for end users Collocation tools Relational Database Searchable (4-D, species, etc) Aura Instrument Field of View prediction tool Mission planning/scheduling Aura instrument data subsetting

IGOS/IGACO Theme : IGOS/IGACO Theme IGOS seeks to provide a framework to harmonize space-based and in-situ systems for global observation. Produce comprehensive global and regional data to satisfy the environmental information needs of policy-makers and support scientific and operational environmental programs. Cal/Val is a major component of IGOS and IGACO Strong connection between ACSG and IGACO

Metop and NPOESS AC Instruments Cal/Val Plans : Metop and NPOESS AC Instruments Cal/Val Plans GOME-2 Performance verification and long term tracking Validate Level-1 and Level-2 with feedback Algorithm revision data base for QC Validation data center planned Commitment to reprocessing is not clear IASI Technical Expert Center at CNES for Level 1 validation Level 2 validation TBD: AIRS heritage, Distributed responsibility OMPS Instrument contractor provides post launch cal to system contractor Government oversight Instrument tracking and NRT calibration update by contractor Level 2 validation responsibility of user (NOAA, NASA, DoD) Cal/Val formulation and implementation is immature

Chinese BUV Ozone Instrument : Chinese BUV Ozone Instrument NMSC China contacts NOAA Nov 2004 about flying SBUV-TOMS type instrument on FY-3 polar orbiter 2006 First contact dealt with algorithms and data processing NASA contacted NMSC about cal/val Instrument development just beginning NMSC will contact NASA in near future Is there a role for WGCV?

ACSG Action Items : ACSG Action Items Continue to lobby for stable funding from space agencies for ground based network to insure data quality and timely archiving Coordinate Envisat (chemistry) and Aura validation – NASA/ ESA discussions continue for near term and long term coordination Coordination of validation activities for next generation operational systems: Metop and NPOESS. Representatives are members of ACSG Include aerosol and met sounding validation in ACSG or form new subgroup – No consensus yet by Subgroup Include CO2 (NASA and JAXA initiatives) in ACSG – under consideration by ACSG Consider universal policy for publication, referencing and citation of validation data – on going by ACSG

ACSG Recommendations to WGCV : ACSG Recommendations to WGCV Establish uniform data protocols (nomenclature and formats) for collecting, archiving, and accessing validation data across Earth science disciplines. This could be a joint WGCV–WGISS Project Validation data are a global resource and cost effective archiving and access must be a high priority Aura and Envisat (chemistry) have agreed to maintain validation data protocol uniformity for their respective archives. ESA is funding future requirements for archiving cal/val data, across ES disciplines, using a generalized campaign data base (CDB) which is an expansion and departure from established Atmospheric Chemistry Cal/Val protocols. 2. Consider role of CEOS Cal/Val in upcoming operational systems (NPP/NPOESS and Eumetsat) Operational EO systems will be the major user for validation data US and European operational systems are behind in establishing validation requirements and insuring resources Consider roles of CEOS Cal/Val in context of IGOS, GEOSS, and GMES Next generation EO systems require validation and sharing global resources CEOS WGCV has experience and reach and should play a role

Fourth CEOS Cal/Val Atmospheric Chemistry Subgroup (ACSG-4)3 May 2004, Frascati, Italy : Fourth CEOS Cal/Val Atmospheric Chemistry Subgroup (ACSG-4) 3 May 2004, Frascati, Italy 0830 Introduction and Report from CEOS Cal/Val Plenary E. Hilsenrath 0845 Aura validation plans E. Hilsenrath 0905 Aura Validation Data Center B. Bojkov 0920 SCIAMACHY validation J-C. Lambert 0935 Envisat Validation Data Base A. Vik 0950 Envisat validation “lessons learned” and plans R. Koopman 1010 SciSat Validation activities K. Walker 1025 Break 1040 Eumetsat/GOME validation R. Munro NPP/NPOESS/OMPS validation L. Flynn 1110 Data assimilation and validation W. Lahoz 1125 Upcoming ESA AO for Envisat and OMI validation C. Zehner 1140 GOME algorithm for reprocessing. C. Zehner 1155 Integrated Global Atmospheric Chemistry Observations L. Barrie 1215 Discussions