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Sökning: id:"swepub:oai:DiVA.org:ltu-10424" > The recent state of...

  • Dim, J.R.Earth Observation Research Center, JAXA, 2-1-1 Sengen, Tsukuba (författare)

The recent state of the climate : Driving components of cloud-type variability

  • Artikel/kapitelEngelska2011

Förlag, utgivningsår, omfång ...

  • 2011
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:ltu-10424
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-10424URI
  • https://doi.org/10.1029/2010JD014559DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Validerad; 2011; Bibliografisk uppgift: Article number D11117 ; 20110701 (andbra)
  • To reduce the Earth's radiation budget uncertainty related to cloud types' changes, and better understand the climate constraints resulting from long-term clouds' variability, frequent and finer (than actually existing) observations are necessary. This is one of the aims of future satellite programs such as the Global Change Observation Mission-Climate (GCOM-C) satellite, to be launched by the Japan Aerospace Exploration Agency (JAXA). To facilitate the transition from past to future observations, the actual state of climate variables (e.g., cloud types) needs to be evaluated. This evaluation is attempted in the present work with the analysis of long-term cloud types' distribution and amounts. The data set used for this study is 25 years (1982-2006) of global daytime cloud properties observed by the National Oceanic and Atmospheric Administration- Advanced Very-High-Resolution Radiometer (NOAA-AVHRR) satellites sensors. Though various calibrations have been applied on NOAA-AVHRR data, the effects of the orbit drift experienced by these satellites need to be corrected. A signal processing decomposition method allowing the filtering of the cloud types' amount trend affected by the orbit drift is used to perform the necessary corrections. The results obtained show a quantifiable improvement of the cloud amount estimation and trends of the individual NOAA satellites initial observations, at the global and regional scales. The corrected global cloud amount shows a slight decrease in its linear trend. The driving factors of this trend are the decrease in mid and low clouds overwhelming the increase in high clouds (+0.04% cloud amount/yr). A comparison with other cloud climatology studies such as the International Cloud Satellite Climatology Project (ISCCP) data set shows that the global cloud decrease noticed in NOAA-AVHRR's data is smaller. And, contrary to the NOAA-AVHRR's data, the driving force of the ISCCP linear trend is a sharp decrease in low clouds (-0.20% cloud amount/yr).

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Murakami, H.Earth Observation Research Center, JAXA, 2-1-1 Sengen, Tsukuba (författare)
  • Nakajima, T.Y.Earth Observation Research Center, JAXA, 2-1-1 Sengen, Tsukuba (författare)
  • Nordell, BoLuleå tekniska universitet,Arkitektur och vatten(Swepub:ltu)bon (författare)
  • Heidinger, A.K.CIMSS, University of Wisconsin-Madison/NOAA, Madison (författare)
  • Takamura, T.Center for Environmental Remote Sensing, Chiba University (författare)
  • Earth Observation Research Center, JAXA, 2-1-1 Sengen, TsukubaArkitektur och vatten (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Journal of Geophysical Research116:110148-02272156-2202

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