East Asian Winter Monsoon and the relationship bet

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East Asian Winter Monsoon and the relationship between drought and flood in Huaihe River Basin in summer

Weather dependents ∞ 1997 No. 6 in January cut the tropical western Pacific Figure 6 Xi Xi high latitude anomalies compliance practice {dagger month change in the solid line for the flood. Dotted line for the early years; vertical axis for the month, the abscissa is willing not only in the line of latitude anomaly intensity long wave trough and ridge, and but also in the subtropical ridge on the strength or position changes from winter to summer anomalies toward their the opposite direction. 3 Summary and discussion of the East Asian winter monsoon circulation changes in the world a very important part, it has significant interannual variations. It's unusual for the late circulation and weather will inevitably have an impact. We explore the Huaihe River Basin from the summer drought and flood forecasting into projects and starting to study the early stage of their differences in large-scale circulation features,[link widoczny dla zalogowanych], as well as the relationship between winter and summer circulation. The main conclusion is: 3.1 early summer flood of Huaihe River before the winter weather can be found in its obvious sign. For the earlier years of winter,[link widoczny dla zalogowanych], its large scale circulation features are: the radial-degree circulation in Europe and Asia, East Asia and stronger than normal trough extending southwards, Eurasia and the E g of the thumb region Huo spinach strong ridge of high pressure, Acute high-altitude Tibetan strong and expanded to the west end of Asian winter monsoon is strong cold wave activities between the Central Tibetan situation; and winter floods years ago, the circulation is relatively flat, weak and North East Asia trough shrink, cold wave activity is weak, Asia cold high on the mainland are also weak. 3.2 The circulation characteristics of the tropics is different: For the early years, due to strong cold surge events,[link widoczny dla zalogowanych], the Asian continent along the thumb of the northerly wind is stronger than the year round,[link widoczny dla zalogowanych], it makes 105 ~ E at the cross-equatorial flow to strong, the western Pacific warm pool area of the vapor activity much stronger than normal. Cover is bound to strong local ey circulation puppets; and the characteristics of winter floods years ago, the opposite. Since we are using the season average and more than one example of the homes into, so in time and space above reflects the difference between large-scale circulation features. Significant difference of 3.3 years of drought and flood is also reflected in the seasonal transition from summer on the winter solstice. Early in summer, winter and spring circulation started by the previous degree of strong radial evolution toward the zonal circulation, to May,[link widoczny dla zalogowanych], the situation is completely similar to the summer drought; and floods and vice versa. Subtropical high ridge line position and intensity of seasonal evolution of the trend is opposite. 3.4 these results are given in winter and summer circulation and weather links between the evidence. Winter Monsoon is a very strong signal, it not only affects the flow patterns of atmospheric circulation at that time, and continues to affect the underlying surface conditions and post-circulation and weather. These results also with the foreign long-term drought forecast for the summer to provide effective physical basis.