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Enhancing Understanding of Cloud Processes through Blind Test Case Studies

This document discusses two significant blind test cases from the FIRE (First ISCCP Regional Experiment) and ASTEX (Atlantic & Stratocumulus Transition Experiment), focusing on cloud life cycles, radiative properties, and their interactions. Conducted in the Eastern North Atlantic Ocean, these cases utilize large eddy simulations (LES) without explicit microphysics for accurate modeling. The summary includes various retrieval methodologies, including radar reflectivity, lidar backscatter, and microwave radiometer (MWR) measurements, showcased during the Retrieval Blindtest Workshop held on February 7-9, 2012.

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Enhancing Understanding of Cloud Processes through Blind Test Case Studies

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  1. Simulation and real measurement cases

  2. Blindtest cases • FIRE: First ISCCP Regional Experiment • ASTEX: Atlantic & Stratocumulus Transition Experiment • conducted in the eastern North Atlantic Ocean • designed to improve the understanding of the physical processes involved in the life cycles of cirrus and marine stratocumulus systems, the radiative properties of these clouds and their interactions • both cases from LES: • no explicit microphysics for FIRE case? assumption of constant N • ASTEX? Retrieval Blindtest Workshop, 7.-9.2.2012

  3. ASTEX – radar reflectivity and cloud boundaries Retrieval Blindtest Workshop, 7.-9.2.2012

  4. ASTEX – LWP and IWV Retrieval Blindtest Workshop, 7.-9.2.2012

  5. ASTEX – lidar backscatter and LDR Retrieval Blindtest Workshop, 7.-9.2.2012

  6. ASTEX – MWR brightness temperatures Retrieval Blindtest Workshop, 7.-9.2.2012

  7. FIRE – radar reflectivity and cloud boundaries Retrieval Blindtest Workshop, 7.-9.2.2012

  8. FIRE – LWP and IWV Retrieval Blindtest Workshop, 7.-9.2.2012

  9. ASTEX – lidar backscatter and LDR Retrieval Blindtest Workshop, 7.-9.2.2012

  10. FIRE – MWR brightness temperatures Retrieval Blindtest Workshop, 7.-9.2.2012

  11. Real cases • 8 Sep 2007: stratocumulus cloud layer 0-24 UTC,less inhomogeneous 12:30 UTC 11:13 UTC two days of ARM deployment in the Black Forest 11 June 2007: broken clouds 10-15 UTC,convective type Retrieval Blindtest Workshop, 7.-9.2.2012

  12. 11 June 2007 – CloudNet classification Retrieval Blindtest Workshop, 7.-9.2.2012

  13. 11 June 2007 – Radar measurements Retrieval Blindtest Workshop, 7.-9.2.2012

  14. 11 June 2007 – Lidar measurements Retrieval Blindtest Workshop, 7.-9.2.2012

  15. 11 June 2007 – MWR LWP and IWV Retrieval Blindtest Workshop, 7.-9.2.2012

  16. 8 Sep 2007 – CloudNet classification Retrieval Blindtest Workshop, 7.-9.2.2012

  17. 8 Sep 2007 – Radar measurements Retrieval Blindtest Workshop, 7.-9.2.2012

  18. 8 Sep 2007 – Lidar measurements Retrieval Blindtest Workshop, 7.-9.2.2012

  19. 8 Sep 2007 – MWR LWP and IWV Retrieval Blindtest Workshop, 7.-9.2.2012

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