ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 1

ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017

Aeolus L2A/L2B aerosol, cloud and wind product validation using the Cabauw Experimental Site for Atmospheric Research CESAR – AO5188

Arnoud Apituley, KNMI

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 2

Proposal objectives

1. Validation of Aeolus wind, aerosol and cloud profiles of backscatter, extinction and lidar-ratio using CESAR observations during close proximity overpasses.

2. Assessment of representativeness of Aeolus wind, aerosol and cloud products using time series of CESAR observations.

3. Assessment of local cloud and aerosol conditions on Aeolus retrieved wind profiles based on CESAR records of the atmospheric state.

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 3

CESAR Observatory Cabauw Experimental site for Atmospheric Research A “Field Laboratory”

Raman Lidar Wind profiler Remote Sensing Site

In-situ Aerosol/ Trace Gases

Radiation site (BSRN, Aeronet)

Drizzle suveillance

radar

In-situ

Aerosol inlet

Transport line

Manifold

Ceilometer UV-Lidar

MAXDOAS

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 4

Satellite Validation Main Instruments

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 5

Description of CAL/VAL techniques applied

• The objectives will be accomplished through correlation between ground based remote sensing data from the Cabauw station.

• Data will be used from the operational CESAR suite of instrumentation, in particular the wind profiler, radars and lidars.

• Additional correlative measurements can performed by manually or semi-automated instruments during close proximity Aeolus overpasses.

• Synergy is possible with other validation activities, e.g. – Airborne Aeolus CAL/VAL campaigns – Sentinel-5p/TROPOMI validation

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 6

Contribution to Aeolus CAL/VAL requirements

• Quantify accuracy of L2A and L2B data products by measurements obtained from the CESAR station for integrated atmospheric profiling.

• Characterise deviations of the Aeolus-L2A products from ground truth established by the station.

• Recommendations for improvement to processing algorithms based on intercomparison between observations from space and ground.

• Monitoring of product stability over the observational period foreseen in the proposal.

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 7

Contribution to Aeolus CAL/VAL requirements

• How to improve the CAL/VAL coverage in the Tropics and Southern Hemisphere? – Existing long-term collaboration of KNMI with

Meteorological Service Paramaribo, Surinam

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 8

MDS personnel launching an ozone sonde

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 9

Status of manpower, tools and funding

• Additional manpower needed for tools and analysis

• Synergy with national funded projects for S5p/TROPOMI validation

ESA UNCLASSIFIED - For Official Use, ADM-Aeolus CAL/VAL Rehearsal Workshop, Toulouse, France, 28-30 March 2017 | Slide 10

Next steps • Proposal perparation for

data analysis support • For long-term observations –

proposal to reinforce the CESAR atmospheric observatory

• Campaign planning in collaboration with S5p/TROPOMI validation

• Opportunities for campaign in tropics