SCILOV10 - Final PresentationSCILOV10 Overview

M. WeberInstitute of Environmental Physics (IUP)

University of Bremen weber@uni-bremen.de

Frascati, 26/27 February, 2014

SCILOV FP/FM Agenda

Meeting Agenda• Location: ESA/ESRIN, Room F, Frascati, Italy• 1st day: February 26, 2014, 14:00h-18:00h• 2nd day: February 27, 2014, 08:30h-12:00h• Participants in Frascati: B. Bojkov, G. Brizzi, S. Cassado, A. Dehn, T. Fehr (all ESA), F. Azam, M. Weber (all U. Bremen) ,

… • Participants per Webex: S. Bötel, L. Lelli, N. Rahpoe, A. Richter, K. Weigel (all U. Bremen), …

– Wednesday, Feb. 26 (U. Bremen WEBEX participants in room NW1/U2115):14:00h-14:30h: Setup of Webex conference, Approval of Agenda, Introduction of participants14:30h-15:00h: SCILOV overview /Weber15:00h-15:30h: Irradiance Validation /Weber15:30h-16:00h: Reflectance validation / Lelli (on behalf of Schlundt)16:00h-16:30h: UV radiance validation /Bötel 16:30h-17:00h: Cloud validation / Lelli17:00h-17:30h: Total ozone validation /Weber17:30h-18:00h: NO2 nadir validation /Azam

– Thursday, Feb. 27 (U. Bremen WEBEX participants in room NW1/U2110):08:30h-09:00h: Setup of Webex conference09:00h-09:30h: Validation strategy for minor trace gases /Richter09:30h:10:00h: Limb ozone validation /Rahpoe10:00h-10:30h: Limb NO2 validation /Azam10:30h-11:00h: Limb BrO validation /Azam11:00h-12:00h: Project & management issues , future activities, AOB /Weber

SCILOV „history“

SCILOV = SCIAMACHY Long-term Validation

• SCILOV Phase A/B/C/D (ESRIN Contract No. 18809/05-I-LG)

– Phase A: 2005/02 to 2006/02

– Phase B: 2006/02 to 2007/02

– Phase C: 2007/02 to 2008/02

– Phase D: 2008/06 to 2009/05

• 2010/11: Request for Quotation and SOW from ESA/ESRIN

• 2010/12: SCILOV10 proposal submitted

• 2011/03: Contract signed

– Official start according to contract: 2011/02

• 2011/06: Kick-Off Telecon

– Change in time plan agreed

• 2012/10: MTR in Frascati

• 2013/10: application for cost-neutral contract extension

• 2014/02: FP in Frascati

Goals of SCILOV10

• validation of operational SCIAMACHY Level 2 data version 5 (and higher) from 2002 to present (now 2012) using available correlative data from satellites and ground network

• SCIAMACHY solar irradiance and reflectance/cloud validation

• Inter-comparison of limb data products with GOMOS and MIPAS (O3 and NO2)

• SQWG support by validation of verification data sets

• multi-year comparison of scientific IUP SCIAMACHY retrievals to operational data products

Goals of SCILOV10 (2)

• documenting of validation results on a designated web page with particular emphasis on demonstration of improvements in operational data version upgrades

–Operational validation (regular bi-annual updates)

–Non-operational validation (~annual update)

– Adhoc-validation (in response to SQWG needs)

• establishing a validation strategy plan for nadir minor trace gases where suitable reference measurements are lacking preparation for Sentinel 4, 5P, and 5

Shift of focus in SCILOV 10

• ENVISAT mission ended in April 2012– more relevant: validation for SQWG verification and after

data version upgrades & reprocessing• ACVE-3 meeting (March 2013)• Valdiation activities from ENVISAT to Sentinels– See „valdiation strategy for minor trace gases“• SCIAMACHY as a climate data record: O3 limb– SPARC Data Initiative (DI)– ESA Ozone cci• http://www.esa-ozone-cci.org/

– SI2N (SPARC/IGACO-O3/IOC/NDCC) initiative: „Activity on Past changes in the Vertical Distribution of Ozone” • http://igaco-o3.fmi.fi/VDO

List of data products to be validated (1)-Level 1-Limb

List of molecules to be validated (2)

• b

-nadir-clouds

Adjusted work plan

• 2011/06: Extension of the project until end 2013/09• 2013/11: extension to 2014/02

MTR ACVE-3 FP

Delivery time table (after KO meeting)

√√

web-portal (1st draft)

AG _Italy paper

Status

ACVE-3 papers/MTR9 papers/Management rep.

?

Obsolete actions

• Web-portal:– 1st draft installed– No IT capacity for this– Obsolete as ENVISAT mision ended– Only a final documentation website

• CEOS EO Calval site correlated SCIA reflectances– Poor statistics/lcoud contamination– MERIS provides best collocations and stable ten year record

major focus for cloud/reflectance validation– Addon: UV reflectance verification (Bötel)

Personnel

– Personnel involved:• Sebastian Dikty Faiza Azam (nadir validation, paid by SCILOV)• Katja Weigel Faiza Azam (limb validation, postdoc, paid by SCILOV)• Luca Lelli (1 year postdoc, radiance/clouds, paid by SCILOV)• Cornelia Schlundt (6 months,postdoc, MERIS comparisons,paid by

SCILOV)• Stefan Bötel (PhD), UV reflectance validation• Andreas Richter (validation strategy report for minor trace gases,

advisor NO2 nadir)• Joseph Pagaran (irradiance validation) • Nabiz Rahpoe (ozone-cci: O3 limb validation)• Mark Weber (project management, TO3/irradiance validation)• Patricia Liebing, Stefan Noel, Heinrich Bovensmann (support level1

issues/SQWG/SOST) • Wolfgang Gurlit (web implementation)

Papers as final reports• Azam, F., K. Weigel, A. Rozanov, M. Weber, H. Bovensmann, and J. P. Burrows, Validation of

SCIAMACHY ESA/DLR NO2 limb stratospheric profiles version 5.02, to be submitted to AMT.• Azam, A., K. Weigel, A. Rozanov, M. Weber, H. Bovensmann, and J. P. Burrows Validation of

SCIAMACHY ESA/DLR BrO limb stratospheric profiles version 5.02, to be submitted to AMT.• Azam F., A. Richter, M, Weber, H. Bovensmann, and J.P. Burrows, Validation of SCIAMACHY

ESA/DLR NO2 total column version 5.02 • Boetel S., M. Weber, A. Rozanov, and J. P. Burrows, An Instrument Independent Soft

Calibration for UV Nadir Radiances for the Radiance Validation and Improvement of Ozone-profile Retrievals for Multi-Instrument Datasets, to be submitted to AMT.

• Lelli, L., M. Weber, J.P. Burrows, Evaluation of SCIAMACHY ESA/DLR cloud parameters version 5.02 by comparison to ground-based and other atellite data, to be submitted to AMT.

• Rahpoe, N., K. Weigel, A. Rozanov, M. Weber, Validation of SCIAMACHY ESA/DLR limb ozone product version 5.02 by comparisons to other satellite data, to be submitted to AMT

• Richter, A., M. Weber, J. P. Burrows, J.-C. Lambert, A. van Gijsel, Validation strategy for satellite observations of tropospheric reactive gases, Ann. Geophys. - Italy, 56, 1-10, doi:10.4401/ag-6335, 2013.

• Schlundt, C., S. Noel, and M. Weber, Intercomparison study of top-of-atmosphere reflectances measured by SCIAMACHY and MERIS onboard ENVISAT from August 2002 to March 2012, to be submitted to AMT.

• Weber, M., Dikty, S., V. E. Fioletov, M. Coldewey, M. Coldewey-Egbers, S. M. Frith, D.Loyola, Validation of two SCIAMACHY total ozone column data products (SGP 5.02 and WFDOAS V2) by comparisons to groundbased and other satellite data

• Weber, M., S. Noel, J, P. Burrows, Comparison of SCIAMACHY solarirradiance data with other solar data, to be submitted to Sol. Phys.

Documentation deliverables

• 10 scientific papers– 1st draft sufficient for project closure• 1 management report• documentation collection on a dedicated

website (either at ESA CALVAL or link to IUP)• plotting data made available to ESA (not public)• CEOS EO calval site– only reference to Meris validation with CEOS EO site

data

Issues and Recommendations

• Solar irradiance:– Still some issues with NIR channels in V8 (quick icing a problem, 850 nm) needs

further evaluation– Improving degradation (optical throughput model) by allowing for natural SSI

variability (EU Solid, BMBF ROMIC)– Corrections from pre-flight condition is still not complete (WLS correction

• UV/NIR reflectance– Trace back SCIAMACHY validation to MERIS validation using CEOS EO Calval sites– LOS dependence

• UV reflectance (soft calibration)– LOS dependence

• Clouds– CTP- CTH conversion (AATSR): standard atmosphere vs ECMWF– Surface: snow, coastal line, aerosol– Further improvements in algorithms (ice/water clouds, improved OCRA thresholds)

• Total ozone– GODFIT better than SGP5

• NO2 total columns– LOS dependence– Ground validation

Issues and Recommendations

• Limb ozone– ESA/DLR algorithm needs to add Hartley/Huggins band (IUP algorithm

needs to add Huggins band)– Drop after 2011– Cloud filtering– Bump in differences at 30 km (Huggins wavelengths)

• Limb NO2– Too strong regularization in ESS/DLR (L-curve)– Large polar bias between ESA and IUP (nut NO2 is very low in polar

night, IUP shows seasonality)– Optimization of photochemical correction

• Limb BrO– Use variable BrO climatology in ESA/DLR retrievals– Improve SNR by integrating 4 azimuth angles before retrieval– Improve regularisation (see NO2)

Issues and Recommendations

• Minor trace gas validation strategy (towards S5P)– Good and adaptive spatial (temporal) coverage (specific events)

lightweight and mobile instrumentation, continuous measurements (reference)

– Establishment of a reference/standard– Standardisation procedures/tools/data format/apriori/input data, e.g.

albedo, aerosol, climatologies, …– data assimilation– A combination of long-term observations and dedicated campaigns

“mobile” and flexible reference network (e.g. commercial platforms) “crowd” validation (high number instruments more important than few very accurate instruments but both needed)

Capacity building– Need for surface proberties: NO2, albedo

Future activities

• Validation of SCIA L1-V8 (V9) and L2-V6 (V7) (collaboration with SQWG)– What to cover? Limited resources, verification support, links

to other valdiation activities (SCIAVALIG), carry over to S5P• Formation of an air quality validation network with

instrumentations from simple (many, movable) to sophisticated (supersites, stationary) for minor trace gas validation– Dedicated measurement sites, mobile instrumentations,

commercial piggy backs, dedicated campaigns, standardisation by intercomparison campaigns, tools, auxiliary input,…

– Preparation for Sentinel