Aerosol typing and characterization for applications in satellite cal/val activities

Postgraduate Thesis uoadl:2775529 103 Read counter

Unit:
Κατεύθυνση Φυσική Περιβάλλοντος (ΕΦΑΡΜΟΣΜΕΝΗ ΦΥΣΙΚΗ)
Library of the School of Science
Deposit date:
2018-06-25
Year:
2018
Author:
Tetoni Eleni
Supervisors info:
Ελένη Γιαννακάκη, Λέκτορας, Τμήμα Φυσικής, Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών
Βασίλειος Αμοιρίδης, Ερευνητής Α' Βαθμίδας, Εθνικό Αστεροσκοπείο Αθηνών
Iwona Stachlewska, Επίκουρη Καθηγήτρια, Πανεπιστήμιο Βαρσοβίας
Original Title:
Χαρακτηρισμός και τυποποίηση αιωρούμενων σωματιδίων για χρήση σε μελέτες διακρίβωσης δορυφορικών δεδομένων
Languages:
Greek
Translated title:
Aerosol typing and characterization for applications in satellite cal/val activities
Summary:
In this dissertation, an extended validation study for the aerosol Level 2 / Version 4.10 product of the Lidar system on board the Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) has been carried out. The aim of this work was to evaluate cloud-free atmospheric scenes during CALIPSO overpasses compared to ground based measurements from Lidar PollyXT instruments of the National Observatory of Athens (NOA) and the University of Warsaw (UW). After finding the nearest satellite overpasses from each station, the optical properties of the aerosol particles were retrieved and fully characterized. The comparison of satellite and ground-based measurements is focused on the vertical profiles of backscatter coefficients at 532nm and 1064nm showing an underestimation of atmospheric scenes from the Lidar system on board the satellite relatively to ground-based measurements. A comparison was also made for CALIPSO Version 3 so as to check possible improvements for Version 4.10. A significant improvement in satellite products was observed for the new Version 4.10, which reached 81% at both 532nm and 1064nm wavelengths, demonstrating a lower underestimation from CALIPSO’s Lidar compared to Version 3 and Lidar PollyXT measurements.
Main subject category:
Science
Keywords:
validation, backscatter coefficient, CALIPSO, Lidar
Index:
Yes
Number of index pages:
1
Contains images:
Yes
Number of references:
49
Number of pages:
131

Master_Tetoni.pdf
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