Impact of SST reanalyzed using OGCM on weather simulation: A case of a developing cyclone in the Japan Sea area

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Abstract

It is difficult to estimate high-resolution sea surface temperature (SST) distributions in coastal areas under cloudy and rainy weather conditions. This study makes use of dynamical estimates of SST produced by combining satellite measurements into an eddy-resolving ocean general circulation model (OGCM). The reanalyzed SST provides an improved surface boundary condition for mesoscale atmospheric simulations. We examined a developing cyclone passing over the Japan Sea in comparative experiments undertaken using reanalyzed and satellite-measured SSTs. Mesoscale features of the SSTs resulting from ocean dynamics influence the development of the cyclone. In particular, the surface turbulent heat flux, precipitable water, and cloud water are sensitive to the difference between the two sets of SSTs. In these experiments, the simulation results obtained using the reanalyzed SST data are more similar to observed data than the results obtained using satellite-measured SST.

Original languageEnglish
Article numberL05808
JournalGeophysical Research Letters
Volume34
Issue number5
DOIs
Publication statusPublished - Mar 16 2007

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cyclones
sea surface temperature
weather
cyclone
general circulation model
Japan
oceans
ocean
simulation
ocean dynamics
estimates
water
heat flux
temperature distribution
sea
precipitable water
vortices
cloud water
boundary conditions
high resolution

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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title = "Impact of SST reanalyzed using OGCM on weather simulation: A case of a developing cyclone in the Japan Sea area",
abstract = "It is difficult to estimate high-resolution sea surface temperature (SST) distributions in coastal areas under cloudy and rainy weather conditions. This study makes use of dynamical estimates of SST produced by combining satellite measurements into an eddy-resolving ocean general circulation model (OGCM). The reanalyzed SST provides an improved surface boundary condition for mesoscale atmospheric simulations. We examined a developing cyclone passing over the Japan Sea in comparative experiments undertaken using reanalyzed and satellite-measured SSTs. Mesoscale features of the SSTs resulting from ocean dynamics influence the development of the cyclone. In particular, the surface turbulent heat flux, precipitable water, and cloud water are sensitive to the difference between the two sets of SSTs. In these experiments, the simulation results obtained using the reanalyzed SST data are more similar to observed data than the results obtained using satellite-measured SST.",
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AB - It is difficult to estimate high-resolution sea surface temperature (SST) distributions in coastal areas under cloudy and rainy weather conditions. This study makes use of dynamical estimates of SST produced by combining satellite measurements into an eddy-resolving ocean general circulation model (OGCM). The reanalyzed SST provides an improved surface boundary condition for mesoscale atmospheric simulations. We examined a developing cyclone passing over the Japan Sea in comparative experiments undertaken using reanalyzed and satellite-measured SSTs. Mesoscale features of the SSTs resulting from ocean dynamics influence the development of the cyclone. In particular, the surface turbulent heat flux, precipitable water, and cloud water are sensitive to the difference between the two sets of SSTs. In these experiments, the simulation results obtained using the reanalyzed SST data are more similar to observed data than the results obtained using satellite-measured SST.

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