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| 1 | Will boreal winter precipitation over China increase in the future? An AGCM simulation under summer “ice-free Arctic” conditions显示文摘Frequent winter snowstorms have recently caused large economic losses and attracted wide attention.These snowstorms have raised an important scientific question.Under scenarios of future global warming,will winter precipitation in China increase significantly and produce more snow in the north? Using Coupled Model Intercomparison Project phase 3 (CMIP 3) model projections under the Special Report on Emissions Scenario A1B scenario,we generated a possible future Arctic condition,the summer (September) 'ice-free Arctic' condition.We then used corresponding monthly sea surface temperature (SST) values and a set of CO 2 concentrations to drive an atmospheric general circulation model (AGCM),for simulating East Asian climate change.The experimental results show that during the boreal winter (December-January-February;DJF),global surface air temperature would increase significantly under this scenario,producing substantial warming in Arctic regions and at high latitudes in Asia and North America.The Siberian High,Aleutian Low and East Asian winter monsoon would all weaken.However,because of increased transport of water vapor to China from the north,winter precipitation would increase from south to north.In addition,the significant increase in winter temperature might cause fewer cold surges. | MA JieHua WANG HuiJun ZHANG Yin | 2012 | Chinese Science Bulletin2012，57，8： | 15 |
| 2 | Relationship between Hadley circulation and sea ice extent in the Bering Sea显示文摘The linkage between Hadley circulation(HC)and sea ice extent in the Bering Sea during March-April is investigated through an analysis of observed data in this research.It is found that HC is negatively correlated to the sea ice extent in the Bering Sea,namely,strong(weak)HC is corresponding to less(more)sea ice in the Bering Sea.The present study also addresses the large-scale atmospheric general circulation changes underlying the relationship between HC and sea ice in the Bering Sea.It follows that a positive phase of HC corresponds to westward located Aleutian low,anomalous southerlies over the eastern North Pacific and higher temperature in the Bering Sea,providing unfavorable atmospheric and thermal conditions for the sea ice forming,and thus sea ice extent in the Bering Sea is decreased,and vice versa.In addition,it is further identified that East Asian-North Pacific-North America telecon-nection may play an important role in linking HC and changes of atmospheric circulations as well as sea ice in the Bering Sea. | ZHOU Bomao WANG HuiJun | 2008 | Chinese Science Bulletin2008，53，3： | 6 |
| 3 | Review of China's scientific research progress in polar meteorology in the last 30 years显示文摘The Antarctic and Arctic are sensitive to global climate change;therefore,they are key regions of global climate change research.This paper,the progress in scientific investigations and research regarding the atmosphere in the polar regions over the last 30 years by Chinese scientists is summarized.Primary understanding of the relationship between the polar regions and global change,especially,the variations in time and space in the Antarctic and Arctic regions with respect to climate change is indicated.Operational weather forecasts for investigation of the polar regions have also been established.Moreover,changes in sea ice and their impact on the atmosphere of polar regions have been diagnosed and simulated.Parameterization of the atmospheric boundary layer of different underlying layers and changes in the atmospheric ozone in the polar region has also been experimented.Overall,there has been great progress in studies of the possible impact of changes in the atmospheric environment of polar regions on circulation in East Asia and the climate of China. | LU LongHua BIAN LinGen | 2011 | Chinese Journal of Polar Science2011，22，1： | 2 |
| 4 | Interannual and interdecadal variations in the North Atlantic Oscillation spatial shift显示文摘The spatial shift of the North Atlantic Oscillation (NAO) is analyzed by using the Twentieth Century Reanalysis version 2 dataset and identifying NAO action centers directly on winter mean sealevel pressure (SLP) anomaly maps. The spatial shift of the NAO is characterized by four NAO spatial shift indices: the zonal and meridional shifts of the NAO southern and northern action centers. It is found that the zonal and meridional shift trends of the NAO action centers move along a path of southwest-northwest direction. Spectral analysis shows that the four NAO spatial shift indices have periodicity of 2-6 years and the NAO index has periodicity of 2-3 years in terms of high-frequency variations. On a decadal time scale, the NAO spatial shift indices are closely (positively) related to the NAO index, which is in agreement with previous studies of the relationship between the NAO index and the spatial shift of the NAO pattern. However, there is no relationship between the NAO index and the meridional shift of the northern action center on an interannual time scale. The significant relationship between the NAO index and the interannual variability of NAO spatial shift indices is very likely to be associated with synopticscale Rossby wave breaking, which generates surface pressure anomalies and thus affects the phase and pattern of the NAO. The correlations of winter westerly winds over 90°W-0° and the NAO index and the NAO spatial shift indices have a '+ - + -' structure from the Equator to the North Pole. Although there is close correlation between the NAO spatial shift indices and the strength of the zonal winds in the North Atlantic region, the effect of the zonal winds on the NAO spatial shift differs at different latitudes. Hence, the role of the zonal winds is probably a result of the NAO spatial shifts. | ZHANG XiaoJian JIN LiYa CHEN ChunZhu GUAN DongSheng LI MingZhi | 2011 | Chinese Science Bulletin2011，56，24： | 1 |
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