【摘 要】
：
The associations between autumn Arctic sea ice and East Asia winter climate have been investigated for three sub-periods during 1979-2013 that are classified using the regime shift method.During the p
【机 构】
：
LASG, Institute of Atmospheric Physics, Chinese A
论文部分内容阅读
The associations between autumn Arctic sea ice and East Asia winter climate have been investigated for three sub-periods during 1979-2013 that are classified using the regime shift method.During the period with rapid decline of and low sea ice extent (2007-2012), the atmospheric circulation shows an enhanced Siberian high, strengthened East Asia trough, and amplified anticyclone activities at north Siberia.This results in the cold anomalies in central and East Asia.Associated with the Arctic amplification (mainly confined to the 700-hPa), the zonal wind decreases in mid-latitudes (40-60°N) according to the thermal wind balance.This is linked to the slow-down and equatorward shift of jet stream and the intensified of wave amplitude.
其他文献
The main thrust of this paper is to identify the role of different high-resolution wind forcing fields for the model representation of Antarctic coastal sea ice.Resolving 4-hourly winds from the opera
Extreme cold winter weather events have more frequently occurred during the recent decade than before over the Eurasian continent.Various contributing factors have been examined, such as changes in th
Chronostratigraphic control of the core BN05 collected from Arctic Ocean was provided by AMS14C dating and paleomagnetic methods, as well as correlation to earlier established Arctic Ocean stratigraph
Subglacial ecosystem has been recognized as an environment with considerable methanogenic activity, and therefore is of significant impact on global methane budget and climate change.However, the char
As the leading mode of the global atmospheric mass inter-annual variability, the Southern Hemisphere (SH) annular mode (SAM) may exert potential influences to the Northem Hemisphere (NH) climate, but
本文重点分析了2013年夏季格陵兰冰盖表面的融化特征,并将2013年与2012融化极值年的异常进行对比,探讨二者之间存在的动力和热力差异及其对冰盖表面融化的影响和机制.结果表明：2013年夏季格陵兰冰盖表面最大融化范围仅为44％,远小于2012年的97％,持续的时间也比2012年短20天左右,平均的融化面积和持续时间都接近气候平均态.2013年夏季大气环流异常与2012年近乎完全相反,格陵兰及附近
The wintering filed observations of the landfast ice off Zhongshan Station, Prydz Bay, Antarctica,were carried out in 2012.The landfast ice was partly broken in January and re-frozen into new ice in t
Based on the monthly sea ice concentration data of Hadley Center, the NCEP/NCAR reanalysis data and the Best Track Data of the Japan Meteorological Agency RSMC Tokyo-Typhoon Center from 1977 to 2011,
Fram海峡的海冰输出被认为是北极多年冰质量平衡的主要贡献者，也是北大西洋深层对流变化的驱动源之一。海冰输出量很大程度上受到海冰运动的制约，而海冰运动又极大地受到表面风场和海流的影响。近来的研究发现，风暴路径有向极地转移的现象，风暴活动的强度也在加强，这些变化自然会影响到表面风应力，也反过来影响到海洋环流和海冰的运动。位于Fram海峡以南的冰岛附近地区，是气旋多发的区域， 这些气旋进一步向高纬地区
利用2004/05年度中国第21次南极考察获取的Dome A冰盖高频冰雷达探测数据,选取依次穿过昆仑站、Dome A冰穹点以及S和N(与AWI测线的交点)位置点的断面,示踪出其内部等时层结构,结合德国AWI高频冰雷达测线(连接Dome A冰穹点与Vostok冰芯)和Vostok冰芯年代数据,得到了DomeA冰盖内部六个不同埋深等时层的埋深-年代关系.将此数据作为输入,应用D-J模式,反演出了Dom