Weddell Sea region is the key region for summer temperature in Northeast China. If the sea ice of this key region in September is in light ice condition, the next June temperature in Northeast China also tends to be deficit.

• Weddell海区是影响我国夏季东北温度的海冰关键区,若该区上一年9月海冰偏多,则来年6月我国东北温度偏低。