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# Roger-20121030

Surface Particle Exchange between Western North Pacific Basin and Adjacent Marginal Seas Chang 1 , M.-C., Y.-L. Chang 2 , L. Oey 1 ,*and Y.-C. Lin 1 1: National Central University 2: National Taiwan Normal University * Corresponding author (lyo@princeton.edu). Roger-20121030. abstract.

## Roger-20121030

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### Presentation Transcript

1. Surface Particle Exchange between Western North Pacific Basin and Adjacent Marginal Seas Chang1, M.-C., Y.-L. Chang2, L. Oey1,*and Y.-C. Lin1 1: National Central University 2: National Taiwan Normal University * Corresponding author (lyo@princeton.edu) Roger-20121030

2. abstract 緣起：隨著數值化的物理海洋模式發展趨向完善，大部分的海洋參數都可以模擬，如海流，海面高度，海溫，鹽度等等。ATOP便是其中之一，從2012年3月起，ATOP模式提供了以真實時間軸的預報，且ATOP內也有浮標等模組。本研究希望利用這些浮標模組產生的資料來探討在西北太平洋,東海,南海間表面海水交換作用。

3. Method Use the model result data. Get the surf & wind velocity, and compute the angle of the model grid point. Then get every grid point's particle velocity(U&V). Sx=(Ucos+Vsin)*T ,Sy=(Vcos+Usin)*T if T>0, forward ,elseif T<0 backward. Get The Sx,Sy , then convert Sx,Sy to lonadd and latadd . lonadd=(Sxcos+Sysin)/(1852*60), latadd=(Sycos+Sxsin)/(1852*60) (lonnext,latnext)=(lonnow,latnow)+(lonadd,latadd ) 使用ATOP模式所產生出來的資料，取出洋流速度，風速，並計算模式中每個模式格點中的夾角。利用這些資料求出每個模式格點內浮標的流速，再求出流動的距離轉換回流動的經緯度，便可以求出下一步浮標的經緯度。

4. Area Divide W3 <200m W4 <200m E4 130E E3 18N W2 E2 12.5N W1 9N E1 ? 0-35N & 100-170E

5. Initial Particle Positions W4 E4 E3 W3 W2 E2 W1 E1

6. 1997_1

7. 1997_1 % bar_plot

8. 1997_7

9. 1997_7 % bar_plot

10. 2003_1

11. 2003_1 % bar_plot

12. 2003_7

13. 2003_7 % bar_plot

14. Taiwan & China Coast Drifter Example • Green: release point • Red: end point • Period1: 2/12~4/11

15. Backward Particle-Tracking for Apr/11 ~ Feb/12 (A) (B) (C) (D) (E) (F) (G) (H) (I) Start Stop

16. Taiwan & China Coast Drifter • Period2: 4/12~6/11

17. Taiwan & China Coast Drifter • Period3: 6/12~8/25

18. Taiwan & China Coast Drifter • Period4: 8/26~10/29

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