2022 Summer Intern Program Posters

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2022.08.22
Using SPOT Images to Identify the Shoreline Changes over the Coastal Area in East Taiwan
Ping-Yu Chen, Yi-Ying Chen
參與「不同社會經濟發展情境下台灣土地利用變化之過程與分析」研習計畫

Abstract

The spatial and temporal changes in shorelines were among the most significant observations in coastal area monitoring (Bamdadinejad, et al., 2021). One environmental factor that may induce rapid changes in shorelines was the sea-level rise caused by climate change (Adebisi, et al., 2021). This research focused on the impact of rising sea levels on the Eastern Taiwanese shoreline.

Multi-spectrum satellite images (SPOT) were analyzed with the Normalized Difference Water Index (NDWI), the Normalized Difference Vegetation Index (NDVI), the Green-Red Vegetation Index (GRVI), and another self-defined index to identify the water and land (Abedelhady, et al., 2022). Principal component analysis (PCA) was used afterwards to improve image pixel classification. Finally, by way of a simple statistical approach, the study concludes that there was minimal change in the eastern coastal area of Taiwan and the status of the shoreline remained relatively stable between the years 2016 and 2021.

Keywords

Satellite image, shoreline, SPOT, classification, extraction, sea level rise

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2022.08.22
Taiwan summer temperature linked to the Pacific Meridional Mode
Chieh-Ting Tsai, Yi-Chi Wang
參與「運用數據分析了解氣候變遷中的降雨及溫度變化」研習計畫

Abstract

This study investigates the association between the Taiwan summer temperature (TST) and the Pacific meridional Mode (PMM), an anomalous north-south sea surface temperature gradient over the northeastern subtropical Pacific, during 1960-2018. It’s found that when the PMM was in the positive state, the summer temperature in Taiwan significantly increased. And the reverse happened during its negative phase. When the ENSO signal was removed, the correlation between the two was higher. During the PMM positive phase, Taiwan and the adjacent area became hotter and drier.

Keywords

the PMM、EOF analyze、summer temperature

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