Paper Review 2009.11.17 Kirsten Feng

Comparison of East Asian winter monsoon indices Gao Hui

Monsoon Circulation Components The Siberian high and the Aleutian low in the sea level pressure (SLP) field The deep trough in themiddle-higher level over the East Asian region The predominant northwesterlies over northeastern Asia in the lower troposphere, The strong westerly jet stream centers at southern Japan at higher level

4 Definitions and the Bases The land-sea pressure differences (Shi, 1996) The regional averaged meridional wind in the lower troposphere (Ji and Sun, 1997;Chen et al., 2001) The zonal wind in higher troposphere (Jhun and Lee, 2004) The East Asia trough (Sun and Sun, 1995).

Variables, Regions and Meanings

Time series of the 4 EAWM indices

Power spectra of the 4 EAWM indices

Correlation coefficients of the EAWM indices

Correlation coefficients of each index with SLP

Correlation coefficients of each index with 500 hPa

Correlation coefficients of each index with surface air temperature

Thank you!