cld cci results coloc 2019 - esa climate office€¦ · esa unclassified -for official use...
TRANSCRIPT
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ESA UNCLASSIFIED - For Official Use
Cloud_cciRainer Hollmann1, Martin Stengel1, Gareth Thomas2
1Deutscher Wetterdienst, 2STFC-RAL
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 2
Content
• Cloud_cci recent developments and available data sets
• Intercomparison of latest versions
• Cloud_cci+ objectives
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 3
Cloud_cci v3 datasets
Data Sensor(s) Satellite(s) Timeperiod
Algorithm Processing levels Properties included
Cloud_cciATSR2-AATSR v3
ATSR2, AATSR ERS-2 ENVISAT 1995-2012 CC4CL L2, L3U, L3C CMA/CFC,CPHCOT,CER,CTPCTH,CTT,LWP,IWP,JCH,CLA, TOA, BOA
Cloud_cciAVHRR-AM v3
AVHRR-2, AVHRR-3 NOAA-12, 15,17,Metop-A
1991-2016 CC4CL L2, L3U, L3C CMA/CFC,CPHCOT,CER,CTP,CTH,CTT,LWP,IWP,JCH,CLA, TOA, BOA,PAR
Cloud_cciAVHRR-PM v3
AVHRR-2, AVHRR-3 NOAA-7,9, 11,14,16,19 1982-2016 CC4CL L2, L3U, L3C CMA/CFC,CPHCOT,CER,CTP,CTH,CTT,LWP,IWP,JCH,CLA, TOA, BOA,PAR
Stengel et al., 2019 to besubmitted.
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 4
AVHRR-PMv3:
Cloud_cci v3 datasets - Radiative flux examples
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 5
Cloud_cci satellite simulators:SIMFERA (simplistic simulator)
Stengel et al., ACP, 2018
Multi-annual mean cloud phase (CPH), presented as liquid cloud fraction
(a-c) ERA-Interim for 3 optical thickness thresholds (COTth=0.0, 0.15, 1.0)(d) Cloud_cci(e) Zonal mean plot of CPH for all four sets.
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 6
Cloud_cci satellite simulators: (full-flavour online simulator)
Eliasson et al., GMD, 2019
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 7
Broadband flux products
AATSR L3C v3.0 2010-04
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 8
Application to SLSTR
• CC4CL applied to a small amount of SLSTR data: July-September 2017
• Essentially applying (A)ATSR processor to the new instrument
• Results in line with expectations
• Regular processing of SLSTR about to commence under Copernicus Climate Change Service (C3S_312b Lot1).
SLSTR L3C v3.0 2017-08
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 9
Cloud_cci used in GDAP Cloud Assessment
Global averages of total cloud amount (CA) (right)
amount of high-level, mid-level and low-level clouds relative to all clouds (CAHR, CAMR and CALR) (left).
The right panel presents cloud amount differences between ocean and land
Preliminary, Stubenrauch et al. 2019
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 10
Upcoming in Cloud_cci+
• SEVIRI and SLSTR with utilizing full spectral information from both(in contrast to AVHRR-heritage approach in Cloud_cci)
• With both sensors Cloud_cci+ will now strive for providing cloud and radiation data at higher temporal (SEVIRI) and spatial (SLSTR) resolution facilitating, among others, analyses of small scale cloud processes and their radiative impact at TOA and surface.
• Extending the utilization of machine learning techniques for cloud detection and cloud phase determination
• New forward modelling approaches for the optimal estimation of cloud properties through better accounting for the cloud vertical extent and the sensors’ SRF in modelling scattering
• Improving uncertainty characterizations of the products at all processing levels
• Intensify the link with climate modelling community through 1-2 user case studies
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ESA UNCLASSIFIED - For Official Use ESA | 01/01/2016 | Slide 11
Cloud_cci SummaryØ Two multi-decadal global data sets for the GCOS cloud property ECVs including uncertainty
estimates are available. Ø multi-decadal multi-instrument product from (A)ATSR – AVHRR – MODIS (1982 - 2016)Ø decadal product that uses complimentary information from AATSR and MERIS on-board
of ENVISAT (2002 - 2012)
Ø Final version V3 is available, now ToA and BoA radiation fluxes are consistently derived and included in the products
Ø For SLSTR an ICDR processing has been integrated into C3S_312b_Lot1
Ø Cloud_cci+ will strive for providing cloud and radiation data at higher temporal (SEVIRI) and spatial (SLSTR) resolution facilitating, among others, analyses of small scale cloud processes and their radiative impact at TOA and surface.