Extraction and High-Resolution Analysis of Anomalies in Land Surface Temperature during Extreme Heat in East Asia

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K24379
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 1101:Environmental analyses and evaluation, environmental conservation measure and related fields
• Research Institution: Chiba University
• Principal Investigator: Yamamoto Yuhei 千葉大学, 環境リモートセンシング研究センター, 特任助教 (30845102)
• Project Period (FY): 2019-08-30 – 2021-03-31
• Keywords: ひまわり8号 / 地表面温度 / 猛暑

Outline of Final Research Achievements

Regarding the 2018 heat-wave that occurred around Japan and Korea, the land surface temperature (LST) were retrieved frequently (10 min) using Himawari-8 data, and the areas which had high anomaly of LST were extracted and analyzed. Regarding the vegetation area, it was found that the diurnal waveform of the LST retrieved from Himawari-8 changed due to vegetation stress. Regarding urban areas, it was found that areas where the temperature rises significantly during 2018 heat-wave were affected not only by land-use with low thermal inertia, but also by altitude and distance from the ocean, that is, meteorological factors.

Free Research Field

熱赤外リモートセンシング

Academic Significance and Societal Importance of the Research Achievements

植生域の解析で得られた結果：ひまわり8号を用いた地表面温度の高頻度観測が、植生ストレスの検出に応用できる可能性を初めて示したものであり、森林・農地における「植生の健康診断」への貢献が期待できる。
都市域の解析で得られた結果：猛暑で都市の熱環境がどれだけ悪化するかを、気温ではなく人間の体感温度に近い物理量である地表面温度で初めて調べた研究である。本成果は、今後地球温暖化によって発生頻度が増加する猛暑の影響が加わった際の都市の暑熱環境に関する重要な基礎資料となることが期待される。