Seasonal and diurnal variability of differences between satellite-derived and in situ sea surface temperatures in the south of the Sea of Okhotsk

Yoshimi Kawai, Hiroshi Kawamura

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In order to detect the biases between satellite-derived SSTs and in situ SSTs accurately, we produced a match-up data set from the satellite-derived SSTs (MCSSTs) and the in situ sea water temperature profile data which were observed in the Sea of Okhotsk during July-November, 1992. Using the analysis, we have found seasonal and diurnal variations of the difference between the MCSST and the in situ temperature. At night, the monthly mean MCSST is lower than the monthly mean 1 m-temperature in both summer and autumn. The difference between them in summer is about 0.6∼0.8°C, and that in autumn is about 0.9∼1.1°C. The difference becomes smaller with sun altitude, e.g., in autumn daytime, it is 0.4∼0.7°C. The MCSST is always lower than the 1 m-temperature in autumn; nevertheless, the temperatures at depths of more than 1 m are almost constant. During the day in August, the mean MCSST is higher than the mean 1 m-temperature by some 0.5°C. Analysis of the wind speed data shows that the weaker the wind, the larger the maximum of the differences between the MCSSTs and the 1 m-temperatures. These results suggest that the large differences found in this paper are mainly due to vertical temperature differences between the sea skin and at 1 m depth.

Original languageEnglish
Pages (from-to)343-354
Number of pages12
JournalJournal of Oceanography
Volume53
Issue number4
Publication statusPublished - 1997 Aug 1

Keywords

  • Diurnal variation
  • MCSST
  • MCSST-in situ SST difference
  • Sea of Okhotsk
  • Sea surface temperature
  • Seasonal variation
  • Skin effect
  • Turbulent layer

ASJC Scopus subject areas

  • Oceanography

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