Journal of Oceanography

, Volume 75, Issue 1, pp 23–36 | Cite as

Satellite-borne detection of high diurnal amplitude of sea surface temperature in the seas west of the Tsugaru Strait, Japan, during Yamase wind season

  • Anindya WirasatriyaEmail author
  • Hiroshi Kawamura
  • Magaly Koch
  • Muhammad Helmi
Original Article


The purpose of this study is to investigate the variation of diurnal SST amplitude (∆SST) in the seas west of the Tsugaru Strait, Japan, which exhibit complex topography that affects the wind pattern during “Yamase” season, when cold easterly winds blow around northeastern Japan. We used infrared based satellite SSTs to obtain strong ∆SST signals. The objective analysis data on surface wind, air temperature and relative humidity patterns was used to explain possible mechanisms responsible for the observed phenomena. Although easterly winds are frequently accompanied by clouds that hinder frequent observation of SSTs from space, four cases of high ∆SST were obtained under clear sky conditions. The results show that high resolution satellite data can capture ∆SSTs of more than 5 °C. Further, the ∆SST variation was strongly influenced by topography. The existence of mountains near the study area have the effect of blocking the easterly winds, creating a low wind speed area on the lee side of the mountain range, which is responsible for the generation of high ∆SST, especially in the offshore area. In addition to the topographic effect, the ∆SST values measured in the in-shore area were influenced by the sea breeze. The warm-dry air mass is advected to the coastal seas by the anti-sea breeze which heats the in-shore area and keeps the ∆SST at the same level as that of the offshore area. This finding highlights the importance of understanding air, sea and land interactions in terms of the variation observed in ∆SST in the study area.


Diurnal SST Yamase wind Topographic effect Anti-sea breeze Tsugaru Strait Infrared SST 



We gratefully thank the support from the Ministry of Research, Technology and Higher Education (KEMENRISTEKDIKTI) of the Republic of Indonesia through the World Class Professor Program (No. 168.A10/D2/KP/2017). The first author thanks Prof. Futoki Sakaida for providing A-HIGHERS data. A-HIGHERS data is the property of the Center for Atmospheric and Oceanic Studies, Tohoku University, Japan. The contact person for this data is Prof. Futoki Sakaida (email: GPV data is available at


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Copyright information

© The Oceanographic Society of Japan and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Oceanography, Fisheries and Marine Science FacultyDiponegoro UniversitySemarangIndonesia
  2. 2.Center for Coastal Rehabilitation and Disaster Mitigation StudiesDiponegoro UniversitySemarangIndonesia
  3. 3.Center for Atmospheric and Oceanic Studies, The Graduate School of ScienceTohoku UniversitySendaiJapan
  4. 4.Center for Remote SensingBoston UniversityBostonUSA

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