Geoscience Reference
In-Depth Information
Fig. 3. Composite of summer (JJA) precipitation anomaly in China for the quasi-
normal phase of ENSO mode (a), the quasi-normal phase of the PIM (b), the positive
phase (El Nino) of the ENSO mode (c), the positive phase of the PIM (d). Unit: mm/JJA.
The dark shading and light shading show the
t
-test significance at the 0.05 and 0.1 levels,
respectively.
south and southeast China, the Changjiang-Huaihe River Basin, and the
southern part of North China, but less rainfall is observed from south of
the Changjiang River to Yunnan Province (Fig. 3(a)). Corresponding to the
quasi-normal phase of the Pacific-Indian Ocean, south of the Changjiang
River, North China and the southern part of Northeast China receive
less rainfall, and the areas from the Changjiang-Huaihe River Basin to
Sichuan Province record more rainfall (Fig. 3(b)). Corresponding to the
pure El Nino year, there is more rainfall in the Changjiang-Huaihe River
Basin and Northeast China, less rainfall to the south of Changjiang River
(Fig. 3(c)). Corresponding to the positive phase of the PIM, we can find
more rainfall in southeast China coastal region and from the Changjiang-
Huaihe River Basin to Sichuan Province, and less rainfall in North China
and Northeast China (Fig. 3(d)). Comparing Fig. 3(a) with Fig. 3(b), and
Fig. 3(c) with Fig. 3(d), it clearly indicates that on the summer rainfall in
