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| 1 | Extreme Cold Events from East Asia to North America in Winter 2020/21:Comparisons,Causes,and Future Implications显示文摘Three striking and impactful extreme cold weather events successively occurred across East Asia and North America during the mid-winter of 2020/21.These events open a new window to detect possible underlying physical processes.The analysis here indicates that the occurrences of the three events resulted from integrated effects of a concurrence of anomalous thermal conditions in three oceans and interactive Arctic-lower latitude atmospheric circulation processes,which were linked and influenced by one major sudden stratospheric warming(SSW).The North Atlantic warm blob initiated an increased poleward transient eddy heat flux,reducing the Barents-Kara seas sea ice over a warmed ocean and disrupting the stratospheric polar vortex(SPV)to induce the major SSW.The Rossby wave trains excited by the North Atlantic warm blob and the tropical Pacific La Nina interacted with the Arctic tropospheric circulation anomalies or the tropospheric polar vortex to provide dynamic settings,steering cold polar air outbreaks.The long memory of the retreated sea ice with the underlying warm ocean and the amplified tropospheric blocking highs from the midlatitudes to the Arctic intermittently fueled the increased transient eddy heat flux to sustain the SSW over a long time period.The displaced or split SPV centers associated with the SSW played crucial roles in substantially intensifying the tropospheric circulation anomalies and moving the jet stream to the far south to cause cold air outbreaks to a rarely observed extreme state.The results have significant implications for increasing prediction skill and improving policy decision making to enhance resilience in“One Health,One Future”. | Xiangdong ZHANG Yunfei FU Zhe HAN James E.OVERLAND Annette RINKE Han TANG Timo VIHMA Muyin WANG | 2022 | Advances in Atmospheric Sciences2022，39，4： | 7 |
| 2 | Climate and Forecast Mode Simulations for Antarctica:Implications for Temperature and Wind显示文摘Climate and forecast mode simulations with the regional climate model HIRlam-ECHAM(HIRHAM) are evaluated over a pan-Antarctic domain. The ability of the model to simulate temperature and wind profiles in the troposphere is quantified by comparing its results with radiosonde data acquired from the Davis station for January and July 2007. Compared to the climate mode, the forecast mode was found to deliver improved results for temperature and wind simulations at the near surface and in the lower troposphere. The main remaining model bias found was the under-representation of low-level wind jets. Based on ensemble simulations, it is shown that a distinct internal variability is inherent in the climate mode simulations, and associated areas of reduced predictability over Antarctica are identified. | 辛羽飞 Annette RINKE 卞林根 Klaus DETHLOFF 效存德 Moritz MIELKE | 2010 | Advances in Atmospheric Sciences2010，27，6： | 2 |
| 3 | Simulation and evaluation of 2-m temperature over Antarctica in polar regional climate model显示文摘The European Centre for Medium-Range Weather Forecasts Reanalysis ERA40,National Centers for Environmental Prediction(NCEP) 20th-century reanalysis,and three station observations along an Antarctic traverse from Zhongshan to Dome-A stations are used to assess 2-m temperature simulation skill of a regional climate model.This model(HIRHAM) is from the Alfred Wegener Institute for Polar and Marine Research in Germany.Results show:(1) The simulated multiyear averaged 2-m temperature field pattern is close to that of ERA40 and NCEP;(2) the cold bias relative to ERA40 over all of Antarctic regions is 1.8℃,and that to NCEP reaches 5.1℃;(3) bias of HIRHAM relative to ERA40 has seasonal variation,with a cold bias mainly in the summer,as much as 3.4℃.There is a small inland warm bias in autumn of 0.3℃.Further analysis reveals that the reason for the cold bias of 2-m temperature is that physical conditions of the near-surface boundary layer simulated by HIRHAM are different from observations:(1) During the summer,observations show that near-surface atmospheric stability conditions have both inversions and non-inversions,which is due to the existence of both positive and negative sensible heat fluxes,but HIRHAM almost always simulates a situation of inversion and negative sensible heat flux;(2) during autumn and winter,observed near-surface stability is almost always that of inversions,consistent with HIRHAM simulations.This partially explains the small bias during autumn and winter. | XIN YuFei BIAN LinGen Annette RINKE Klaus DETHLOFF | 2014 | Science China Earth Sciences2014，57，4： | 1 |
| 4 | Winter Weather Patterns over Northern Eurasia and Arctic Sea Ice Loss显示文摘 | Wu Bingyi Handorf D?rthe Dethloff Klaus Rinke Annette Hu Aixue | 2013 | Monthly Weather Review2013，，11： | 1 |
| 5 | ‘Modelling the Arctic Boundary Layer: An Evaluation of Six Arcmip Regional-Scale Models using Data from the Sheba Project’显示文摘 | Michael Tjernstr?m Mark ?agar Gunilla Svensson John J. Cassano Susanne Pfeifer Annette Rinke Klaus Wyser Klaus Dethloff Colin Jones Tido Semmler Michael Shaw | 2005 | Boundary - Layer Meteorology2005，，2： | 1 |
| 6 | Delayed Antarctic melt season reduces albedo feedback显示文摘Antarctica’s response to climate change varies greatly both spatially and temporally.Surface melting impacts mass balance and also lowers surface albedo.We use a 43-year record(from 1978 to 2020)of Antarctic snow melt seasons from space-borne microwave radiometers with a machine-learning algorithm to show that both the onset and the end of the melt season are being delayed.Granger-causality analysis shows that melt end is delayed due to increased heat flux from the ocean to the atmosphere at minimum sea-ice extent from warming oceans.Melt onset is Granger-caused primarily by the turbulent heat flux from ocean to atmosphere that is in turn driven by sea-ice variability.Delayed snowmelt season leads to a net decrease in the absorption of solar irradiance,as a delayed summer means that higher albedo occurs after the period of maximum solar radiation,which changes Antarctica’s radiation balance more than sea-ice cover. | Lei Liang Huadong Guo Shuang Liang Xichen Li John C.Moore Xinwu Li Xiao Cheng Wenjin Wu Yan Liu Annette Rinke Gensuo Jia Feifei Pan Chen Gong | 2023 | National Science Review2023，10，9： | 0 |
| 7 | 一个区域气候模式对南极2m气温的模拟及其评估显示文摘利用ERA40、NCEP 20世纪再分析资料和中国南极中山站到Dome-A断面考察资料,对德国极地与海洋研究所区域气候模式-HIRHAM模拟的南极2 m气温进行了评估,结果发现:(1)模拟的多年平均场空间特征与ERA40和NCEP 20世纪再分析较为接近.(2)模拟存在冷偏差,整个南极地区与EAR40偏冷1.8℃,与NCEP 20世纪再分析偏冷5.1℃.(3)与EAR40偏差存在季节差异,夏季偏冷3.4℃,秋季偏暖0.004℃.进一步分析发现,HIRHAM模式模拟的近地层大气湍流状况与实际状况不同是2 m气温模拟偏差产生的原因:(1)南极夏季近地层观测样本中逆温和非逆温并存,原因是感热通量正负并存,但HIRHAM模式模拟基本全为逆温状况和负感热通量.(2)南极秋、冬季观测基本全为逆温,HIRHAM与之较为吻合,这部分解释了秋、冬季节模式模拟偏差不大的原因. | 辛羽飞 卞林根 Annette RINKE Klaus DETHLOFF | 2014 | 中国科学:地球科学2014，44，4： | 0 |
| 8 | Workshop on Polar Climate Changes and Extreme Events显示文摘Polar climate systems have experienced a number of dramatic changes(Wang et al.,2017;Turner et al.,2016;Gordon,2014;Rignot et al.,2013;Meier et al.,2012;Kwok and Rothrock,2009;Thompson and Solomon,2002),which have influenced climatic conditions across large parts of the globe through large-scale atmospheric and oceanic teleconnections(Dou and Wu,2018;Zhang et al.,2018; | Zhaomin WANG Xiangdong ZHANG John TURNER Annette RINKE | 2018 | Advances in Polar Science2018，29，3： | 0 |
| 9 | Atmospheric feedbacks on Arctic summer sea-ice anomalies in ensemble simulations of a coupled regional climate model显示文摘Ensemble simulations with the Arctic coupled regional climate model HIRHAM-NAOSIM have been analyzed to investigate atmospheric feedbacks to September sea-ice anomalies in the Arctic in autumn and the following winter. Different 'low minus high ice' composites have been calculated using selected model runs and different periods. This approach allows us to investigate the robustness of the simulated regional atmospheric feedbacks to detected sea-ice anomalies. Since the position and strength of the September sea-ice anomaly varies between the different 'low minus high ice' composites, the related simulated atmospheric patterns in autumn differ depending on the specific surface heat flux forcing through the ocean-atmosphere interface. However, irrespective of those autumn differences, the regional atmospheric feedback in the following winter is rather insensitive to the applied compositing. Neither the selection of simulations nor the considered period impacts the results. The simulated consistent large-scale atmospheric circulation pattern shows a wave-like pattern with positive pressure anomaly over the region of the Barents/Kara Seas and Scandinavia/western Russia('Scandinavian-Ural blocking') and negative pressure anomaly over the East Siberian/Laptev Seas. | Annette RINKE Dorthe HANDORF Wolfgang DORN Klaus DETHLOFF John C.MOORE Xiangdong ZHANG | 2018 | Advances in Polar Science2018，29，3： | 0 |
| 10 | Structure and seasonal changes in atmospheric boundary layer on coast of the east Antarctic continent显示文摘The temperature,humidity,and vertical distribution of ozone in the Antarctic atmospheric boundary layer(ABL)and their seasonal changes are analyzed,by using the high-resolution profile data obtained during the International Polar Year 2008 to2009 at Zhongshan Station,to further the understanding of the structure and processes of the ABL.The results show that the frequency of the convective boundary layer in the warm season accounts for 84%of its annual occurrence frequency.The frequency of the stable boundary layer in the cold season accounts for 71%of its annual occurrence frequency.A neutral boundary layer appears rarely.The average altitude of the convective boundary layer determined by the parcel method is 600 m;this is 200 to 300 m higher than that over inland Antarctica.The average altitude of the top of the boundary layer determined by the potential temperature gradient and humidity gradient is 1 200 m in the warm season and 1 500 m in the cold season.The vertical structures of ozone and specific humidity in the ABL exhibit obvious seasonal changes.The specific humidity is very high with greater vertical gradient in the warm season and very low with a lesser gradient in the cold season under 2 000 m.The atmospheric ozone in the ABL is consumed by photochemical processes in the warm season,which results in a slight difference in altitude.The sub-highest ozone center is located in the boundary layer,indicating that the ozone transferred from the stratosphere to the troposphere reaches the low boundary layer during October and November in Antarctica. | BIAN Lingen ZOU Han LIN Zhong ZHANG Dongqi Annette Rinke Klaus Dethloff | 2013 | Advances in Polar Science2013，24，3： | 0 |
| 11 | Arctic sea ice and atmospheric circulation under the abrupt4xCO2 scenario显示文摘We analyze sea ice changes from eight different earth system models that have conducted experiment abrupt4xCO2 of the Coupled Model Intercomparison Project Phase 5(CMIP5). In response to abrupt quadrupling of CO2 from preindustrial levels, Arctic temperatures dramatically rise by about 10°C—16°C in winter and the seasonal sea ice cycle and sea ice concentration are significantly changed compared with the pre-industrial control simulations(pi Control). Changes of Arctic sea ice concentration are spatially correlated with temperature patterns in all seasons and highest in autumn. Changes in sea ice are associated with changes in atmospheric circulation patterns at heights up to the jet stream. While the pattern of sea level pressure changes is generally similar to the surface air temperature change pattern, the wintertime 500 h Pa circulation displays a positive Pacific North America(PNA) anomaly under abrupt4xCO2-pi Control. This large scale teleconnection may contribute to, or feedback on, the simulated sea ice cover change and is associated with an intensification of the jet stream over East Asia and the north Pacific in winter. | YU Xiaoyong Annette Rinke JI Duoying CUI Xuefeng John C.Moore | 2014 | Advances in Polar Science2014，25，4： | 0 |
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