ESA-JAXA Pre-Launch EarthCARE
Science and Validation Workshop
13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

Diego Alves Gouveia
Diego Alves Gouveia

EVID 25: Cabauw Lidar observations for ATLID L1and L2a product evaluation
D.P. Donovan, A Apituley, Diego Alves Gouveia
KNMI, De Bilt, The Netherlands

Primary Objectives (as written in 2018)• ATLID L2a profiles of aerosol/cloud extinction backscatter anddepolarization (A-PRO and ACM-CAP)

Primary Means:• Use Lidar measurements at Cabauw in the central Netherlands• 24/7 ground-based 355nm (elastic)depolarization lidar observations• Multi-wavelength (non-24/7) Raman lidar observations• Supported by other instruments on site (e.g. BSRN site, cloud radar etc..)(scanning) Doppler lidar
UV lidarRaman lidar(CAELI)AWS ceilometerUV lidar•••••

Diode-pumped laser - 355 nm, ~30 mJ/pulse, 50 Hz
355p, 355s, 387 - AN, PC and Standard Deviation
Fully ACTRIS/EARLINET compliant (QAQC)
Full overlap height < 300 m
24/7 unattended operation

Royal Netherlands Meteorological InstituteDecember 11, 2023

December 11, 2023

Royal Netherlands Meteorological Institute33

CÆLI: 3𝛽 + 2𝛼 + 1δ + H2 O••••Cabauw Earlinet lidar
355, 387, 407, 530, 532, 532p, 532s, 607, 1064 nm
Near field and far field telescopes
Raman daytime capabilities (𝛼, 𝛽 at UV)Water Vapor Mixing Ratio

Volcanic Ash4

Elastic depolarization lidar

Raman lidar

Original proposal
Direct L2 comparison.
Use lidar observations at Cabauw ➔ Process to L2➔Forward model L1 ATLID ➔ Compare with ATLID L1 !

A-PRO Depol Data
A-PRO Depol Data

A-PRO Ext Data

A-PRO Ext Data

A-PRO S Data
Comparison

A-PRO S Data
Comparison

Medium/long-term activity
Overpasses
within 100150 km
Preliminary
results will bereported

Uvlidar
Attenuatedbackscatterand Depol

Extinction
andForwardmodelled
Space-based
AttenuatedBackscatter

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

355nm+Raman
Attenuatedbackscatter

Extinction
andForwardmodelled
Space-based
AttenuatedBackscatter

EVID 25: Cabauw uvlidar

What has changed ?
• Cabauw UVlidar (Leosphere) has been decommissioned !
• But new 24/7 355 nm Raymetrics lidar (with Raman channel) is coming on-line !
• Several attempts to obtain specific Cal/Val projects were not successful…
• But recent EU project (e.g. CERTANITY) contains funding that could contribute !
• Ground L2 ➔ Space L1 simulator tool development has been funded by ESA through CARDINAL
and has evolved into the development of a community tool!
• Cabauw lidar data will be processed via ACTRIS .
• So..
• Cabauw will contribute !
• But maybe this specific formal Cal/Val proposal should be merged (subsumed) within thewider Cabauw activities for EarthCARE evaluation (CECARE) umbrella ?
➔(see next talk by A. Apitulay)
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

BACKUP Slides

ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

SCC retrievals:
Caeli + UV-lidar•••2023-07-13Caeli: 3𝛽 + 2𝛼 + δ532 above ~ 800 mUV-lidar: β355, 𝛼355, δ355 above ~ 300 m (24/7)
Mind the gap: Depolarization at UV and VIS, but from different
instruments

2023-07-13

88
Royal Netherlands Meteorological InstituteDecember 11, 2023

December 11, 2023

Royal Netherlands Meteorological InstituteSecond UV-Lidar @ Lutjewad station

By the end of2023

Royal Netherlands Meteorological InstituteDecember 11, 2023