Investigation of clear-sky occurrence rate estimated from CALIOP and MODIS observations

Nawo Eguchi, Tatsuya Yokota

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We derived the global 6distribution of the clear-sky occurrence rate during the daytime using Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) and Moderate-resolution Imaging Spectrometer (MODIS) data. Our goal was to estimate the frequency of likely successful CO2 and CH4 column concentration retrievals by the Greenhouse gases Observing Satellite (GOSAT). Clear-sky regions over land were frequently found around desert regions throughout the year, and at northern mid-latitudes in the winter hemisphere. Overall, clear-sky regions covered approximately 11% of the globe annually, on average. From a comparison of the CALIOP and MODIS cloud data for June 2007, we found that MODIS overestimated the clear-sky ratio by approximately 5%, except for in the tropics.

Original languageEnglish
Article numberL23816
JournalGeophysical Research Letters
Volume35
Issue number23
DOIs
Publication statusPublished - Dec 16 2008
Externally publishedYes

Fingerprint

imaging spectrometers
clear sky
optical radar
MODIS
sky
aerosols
occurrences
polarization
GOSAT
globes
deserts
greenhouses
daytime
hemispheres
tropical regions
winter
retrieval
desert
CALIOP
rate

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Investigation of clear-sky occurrence rate estimated from CALIOP and MODIS observations. / Eguchi, Nawo; Yokota, Tatsuya.

In: Geophysical Research Letters, Vol. 35, No. 23, L23816, 16.12.2008.

Research output: Contribution to journalArticle

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