eda 20100915 tide gauge & aviso

Eda20100915

Tide Gauge&

AVISO

Time period of dataKeelung: 1980-2009Ishigaki: 1969-2008Gangfeng: 1997-2007Suao: 1999-2005Lanyu:1992-2009Dawu:2004-2009

Mean SSH from Rio et al.2009

Black dots are the locations of the tide gauge stations.

Blue contours are the isobaths.

outline

• EOF (AVISO SSH, ECMWF wind stress, curl)• Mean wind stress and curl

• Correlation Coef. , regression and time series of:North Taiwan (tide gauge & AVISO)South TaiwanEast Luzon

• AVISO SSHA Latitude-Time plot (eddy propagation)

EOF AVISO SSH: monthly

EOF AVISO SSH: 360d running mean

mode1: 67% mode2: 7.3% mode3: 3.9 %

Mean wind stress (Pa) and curl (Pa/m)1980~2008Wind filed is dominated by winter monsoon

EOF ECMWF wind stress curl: 720d running mean

EOF ECMWF wind stress: 720d running mean

Time series of SSHATide gauge (black solid)AVISO (red dash)

Comparison: tide gauge and AVISO

Time series of SSHAAVISO: south Taiwan

Time series of SSHAAVISO: east Luzon

Correlation and regression of AVISO SSHA & Tide Gauge North Taiwan

Correlation and regression of AVISO SSHA North Taiwan

Correlation and regression of AVISO SSHASouth Taiwan

Correlation and regression of AVISO SSHAEast Luzon

7 days

monthly

Comparison: tide gauge and AVISO

Comparison: tide gauge and AVISO

+ve

http://jisao.washington.edu/pdo/

SST (color), SLP (contours) and wind

stress (arrows) anomalies during +ve

and –ve PDO’s

-ve

1990

http://www.o3d.org/npgo/