Rectangle - SatCO2

Home > User Manual > 2.4 Data Analysis > 2.4.3 Rectangle >

Click the “rectangle” button and drag the mouse to draw a rectangle on the selected image (Figure 2-32). The system will conduct statistical analysis on the effective grid data contained in the rectangle. The histogram of the selected region is generated, and results such as maximum, minimum, and standard difference are outputs (Figure 2-33).

Figure 2‑32. Image of sea water transparency at 8-km resolution in the Taiwan Strait (a) before Typhoon Morakot passing through (on July 11) and (b) after Typhoon Morakot passing through (August 14). The green transparent rectangle represents the area selected for the rectangle analysis. After He et al. (2015). [Satellite views of the episodic terrestrial material transport to the southern Okinawa Trough driven by typhoon. Journal of Geophysical Research Oceans, 119(7), 4490-4504.]

Figure 2‑33. Rectangular analysis results. Statistical results show that the average chlorophyll concentration was 0.599 mg/m³ on July 30 (a) and was 1.099 mg/m³ on August 15 (b). As can be seen from the histogram and mean value, the chlorophyll concentration in the Taiwan Strait was higher after the typhoon passing through.

Links