南极海冰异常对南半球冬春季大气环流影响的年代际变化

陈奕冰, 吴其冈

Interdecadal changes in the impacts of Antarctic sea ice anomalies on the Southern Hemisphere winter and spring atmospheric circulation

Yibing CHEN, Qigang WU

图3 2000—2021年JAS季节500 hPa位势高度场异常与前期0~4个月和滞后1个月的南极SIC异常MCA首要模态的同质（左侧）和异质（右侧）协方差空间型［位势高度的等值线间隔为7.5 gpm，实线（虚线）为正（负）值，零线省略；阴影和打点区分别代表位势高度和海冰场关于首要MCA-SIC时间序列回归超过95%置信度区域］

Fig. 3 2000—2021 （left） homogeneous SIC and （right） heterogeneous Z500 covariance maps in the first MCA mode at lags from -4 to +1 months when Z500 is fixed on JAS seasons （Contour interval is 7.5 gpm for Z500； Negative contours are dashed and the zero line is omitted； The shaded and dotted areas indicate significance at 95% confidence levels）