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An Extrapolation Technique of Cloud Characteristics Using Tropical Cloud Regimes
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2006 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis tests a technique based on objectively identified tropical cloud regimes, in

which some cloud characteristics are extrapolated from a single site in the tropics to

the entire tropics. Information on cloud top pressure, cloud optical thickness and

total cloud cover from 1985-2000 has been derived from the ISCCP D1 data set and

has been used to create maps of tropical cloud regimes and maps of total cloud cover

over the tropics. The distribution and characteristics of the tropical cloud regimes has

been discussed after which total cloud cover values were extrapolated to the cloud

regimes over the tropics. After a qualitative and quantitative assessment was used to

evaluate the success of the extrapolating method, it was found that the method

worked especially well for time averaged extrapolated data sets using the median

values of total cloud cover values.

Abstract [sv]

I detta magisterexamensarbete testas en metod som baseras på objektivt framtagna

molnregimer, där några molnegenskaper extrapoleras från en plats i tropikerna till

resten av tropikerna. Informationen om molntoppstrycket, molnens optiska djup och

det totala molntäcket från 1985-2000 har hämtats från ISCCP D1 data set och har

använts till att skapa kartor för tropiska molnregimer och för det totala molntäcket

över tropikerna. Distributionen och egenskaperna av de tropiska molnregimerna har

diskuterats och användes sedan för att extrapolera det totala molntäcket över

tropikerna. En kvalitativ och kvantitativ undersökning användes för att utvärdera

framgångarna med extrapoleringsmetoden. Det framkom att metoden fungerade

särskilt bra för extrapolerade data set med median totala molntäcksvärden över

längre tidsperioder.

Place, publisher, year, edition, pages
Examensarbete vid Institutionen för geovetenskaper, ISSN 1650-6553 ; 126
Keyword [en]
tropical cloud regime identification, cloud characterisation, satellite remote sensing
National Category
Meteorology and Atmospheric Sciences
URN: urn:nbn:se:uu:diva-303881OAI: diva2:974325
Subject / course
Available from: 2016-10-04 Created: 2016-09-26 Last updated: 2016-10-04Bibliographically approved

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