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The Unprecedented Extreme Anticyclonic Anomaly over Northeast Asia in July 2021 and Its Climatic Impacts

Advances in atmospheric Sciences 2024年第4期41卷 608-618页

作者： Xingyan ZHOU riyu lu Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China State Key Laboratory of Numerical Modeling for atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

This study investigates the evolution of an extreme anomalous anticyclone(AA)event over Northeast Asia,which was one of the dominant circulation systems responsible for the catastrophic extreme precipitation event in July 2021 in Henan,and further explores the significant impact of this AA on surface temperatures beneath *** results indicate that this AA event over Northeast Asia was unprecedented in terms of intensity and *** AA was very persistent and extremely strong for 10 consecutive days from 13.to 22 July *** long-lived and unprecedented AA led to the persistence of warmer surface temperatures beyond the temporal span of the pronounced 500-hPa anticyclonic signature as the surface air temperatures over land in Northeast Asia remained extremely warm through 29 July ***,the sea surface temperatures in the Sea of Japan/East Sea were extremely high for 3. consecutive days from 13.July to 11 August 2021,persisting well after the weakening or departure of this *** results emphasize the extreme nature of this AA over Northeast Asia in July 2021 and its role in multiple extreme climate events,even over remote ***,possible reasons for this long-lasting AA are explored,and it is suggested to be a byproduct of a teleconnection pattern over extratropical Eurasia during the first half of its life cycle,and of the Pacific-Japan teleconnection pattern during the latter half.

关键词： anomalous anticyclone Northeast Asia surface air temperatures sea surface temperatures

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A teleconnection pattern of upper-tropospheric circulation anomalies over the Eurasian continent associated with the interannual variability of atmospheric convection over the tropical western North Pacific in July

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atmospheric and Oceanic Science Letters 2024年第3期17卷 20-24页

作者： Peishan Chen riyu lu State Key Laboratory of Numerical Modeling for atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences BeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

热带西北太平洋大气对流的年际变化对东亚夏季气候有着显著影响,而且受到前冬ENSO的影响.然而,还有相当多的西北太平洋对流年际变化不能由前冬ENSO解释.本文表明,7月西北太平洋对流受到欧亚大陆对流层上层遥相关型的显著影响,且这一影... 详细信息

热带西北太平洋大气对流的年际变化对东亚夏季气候有着显著影响,而且受到前冬ENSO的影响.然而,还有相当多的西北太平洋对流年际变化不能由前冬ENSO解释.本文表明,7月西北太平洋对流受到欧亚大陆对流层上层遥相关型的显著影响,且这一影响与前冬ENSO的影响程度相当.该遥相关型表现为位于欧洲的气旋式环流异常,中亚的反气旋式环流异常和东亚带状延伸的气旋式环流异常,并表现为7月对流层上层环流的第一主模态.基于本文的结果并结合前人的研究,作者认为这一遥相关型能通过亚洲急流出口区附近的罗斯贝波破碎引起西北太平洋对流异常.

关键词：遥相关大气对流西北太平洋年际变化

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Isolated deep convections over the Tibetan Plateau in the rainy season during 2001–2020

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atmospheric and Oceanic Science Letters 2024年第5期17卷 16-21页

作者： Ying Na Chaofan Li riyu lu School of atmospheric Science and Remote Sensing Wuxi UniversityWuxiChina Key Laboratory of Ecosystem Carbon Source and Sink China Meteorological Administration(ECSS-CMA)Wuxi UniversityWuxiChina Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina State Key Laboratory of Numerical Modeling for atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The Tibetan Plateau(TP)is a prevalent region for convection systems due to its unique thermodynamic *** study investigated isolated deep convections(IDCs),which have a smaller spatial and temporal size than mesoscale convective systems(MCSs),over the TP in the rainy season(June-September)during 2001–*** authors used satellite precipitation and brightness temperature observations from the Global Precipitation Measurement *** show that IDCs mainly concentrate over the southern *** IDC number per rainy season decreases from around 140 over the southern TP to around 10 over the northern TP,with an average *** initiation time of IDCs exhibits an obvious diurnal cycle,with the peak at 1400–1500 LST and the valley at 0900–1000 *** IDCs last less than five hours and more than half appear for only one *** generally have a cold cloud area of 7422.9 km^(2),containing a precipitation area of approximately 65%.The larger the IDC,the larger the fraction of intense precipitation it *** contribute approximately 20%–3.%to total precipitation and approximately 3.%–40%to extreme precipitation over the TP,with a larger percentage in July and August than in June and *** terms of spatial distribution,IDCs contribute more to both total precipitation and extreme precipitation over the TP compared to the surrounding plain *** over the TP account for a larger fraction than MCSs,indicating the important role of IDCs over the region.

关键词： Isolated deep convection Tibetan plateau Climatological characteristics Precipitation contribution Extreme precipitation

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Linear relationship between the interdecadal and interannual variabilities of North china rainfall in rainy season

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Chinese Science Bulletin 2003年第10期48卷 1040-1044页

作者： lu riyu institute of atmospheric physics, Chinese Academy of Sciences, beijing 100080, china institute of atmospheric physics Chinese Academy of Sciences Beijing 100080 China

Interdecadal and interannual timescales are dominant in the North china rainfall in rainy season (July and August). On the interdecadal timescale, the North china rainfall exhibited an abrupt decrease at the end of 1970s. In this study, we examined the effect of this abrupt rainfall decrease on the association between rainfall and circulation on the interannual timescale, and found that the interdecadal variation does not change the physical mechanism responsible for the interannual variation of North china rainfall. There is a linear relationship between the interdecadal and interannual variabilities of North china rainfall in rainy season.

关键词：线性关系中国北部降雨量大气环流

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Insights from the Second Tibetan Plateau Scientific Expedition: Unveiling the westerly–monsoon synergy and hydroclimate changes

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atmospheric and Oceanic Science Letters 2024年第5期17卷 1-2页

作者： Chaofan Li Yaoming Ma Tianjun Zhou riyu lu Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Land-Atmosphere Interaction and Its Climatic Effects Group State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina State Key Laboratory of Numerical Modeling for atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Hydraulic&Environmental Engineering China Three Gorges UniversityYichangChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina College of atmospheric Sciences Lanzhou UniversityLanzhouChina Qomolangma atmospheric and Environmental Observation and Research Station TingriChina Kathmandu Center for Research and Education Chinese Academy of Sciences-Tribhuvan UniversityBeijingChina china-Pakistan Joint Research Center on Earth Sciences IslamabadPakistan

The Tibetan Plateau(TP),often referred to as the“Asian Water Tower”,holds vast reserves of glaciers,snow,and permafrost,serving as the crucial source for major rivers that support billions of people across *** TP’s unique geographical positioning fosters significant interplay between the westerly and monsoon systems,the hydroclimate changes on the TP and its interactions with these two major atmospheric circulation systems through both the thermodynamic and dynamic processes,as well as the atmospheric water cycle of the *** interactions have far-reaching impacts on the weather and climate of china,Asia,and even the global atmospheric circulation.

关键词： Tibetan Plateau holds

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Precursory SST anomalies associated with the convection over the western Pacific warm pool

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Chinese Science Bulletin 2002年第8期47卷 696-699页

作者： lu riyuinstitute of {3. {3., Chinese Academy of Sciences, beijing 100080, china (e-mail: lr@***) institute of atmospheric physics Chinese Academy of Sciences Beijing China

The convection over the tropical western Pacific warm pool influences significantly the atmospheric circulation and climate in East Asia. Thus, the precursory signals of the convection may be used in the forecast of summer climate in china. According to the present results, the June-July-August (JJA) mean convection intensity over the warm pool is significantly related to the precursory positive and negative sea surface temperatures (SSTs) in the warm pool and in the equatorial central and eastern Pacific, respectively. It is also related to the simultaneous negative surface temperatures west to the Philippines. The analysis on the SSTs associated with the convection over the warm pool in individual month of summer shows that for the convection in June and July, there are precursory SST signals in the warm pool and the equatorial central and eastern Pacific. Therefore, this study shows that only the convection in June and July, rather than that in August, has precursory SST signals, despite the

关键词： warm pool convection precursory SSTs El Nino.

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Impacts of monsoon break events in the western North Pacific on the cross-equatorial flows over the Maritime Continent

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atmospheric and Oceanic Science Letters 2024年第2期17卷 33-38页

作者： Xiaoxuan Zhao Minghao Bi Ke Xu Jianqi Sun riyu lu Nansen-Zhu International Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina State Key Laboratory of Numerical Modeling for atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

本文利用ERA5逐日再分析资料,探讨了1979-2020年间西北太平洋季风中断事件对海洋性大陆越赤道气流的影响.合成结果表明,西北太平洋季风中断事件会造成高,低空越赤道气流减弱,即高层南风异常,低层北风异常,与此相关的环流异常表现为西北... 详细信息

本文利用ERA5逐日再分析资料,探讨了1979-2020年间西北太平洋季风中断事件对海洋性大陆越赤道气流的影响.合成结果表明,西北太平洋季风中断事件会造成高,低空越赤道气流减弱,即高层南风异常,低层北风异常,与此相关的环流异常表现为西北太平洋高层气旋,低层反气旋的斜压结构。特别的是,西北太平洋季风中断对高空越赤道气流的影响更为显著,92%的季风中断事件都导致高空越赤道气流减弱,而只有70%的事件造成低空越赤道气流减弱,这是由于低空越赤道气流同时还受到赤道中东太平洋海温异常的调控.

关键词：西北太平洋夏季风季风中断越赤道气流海洋性大陆

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RECENT ADVANCES IN SPACE STUDIES OF THE EATRH SURFACE, METEOROLOGY AND CLIMAfE IN china

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空间科学学报 1998年第S1期18卷 61-70页

作者： lu Da-ren(institute of atmospheric {3., The Chinese Academy of Sciences, {3. 100029)

During past 2 years, Chinese scientists have conducted a series of scientific,technical, and application research relating to earth observation for satellite and payload development, meteorological and environmental monitoring, disaster reduction, resources surveying, and sustainable development of national economy and society. An short and incomplete review is given in this paper.

关键词： Chinese space research Earth observation Satellite programs Remote sensing

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The abrupt northward shift of the East Asian upper-troposphericjet stream in late July

The abrupt northward shift of the East Asian upper-troposphe...

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第六次全国动力气象学术会议

作者： Zhongda Lin and riyu lu institute of {3. {3., Chinese Academy of Sciences, beijing 100080, china

＜正＞ The seasonal evolution of the East Asian upper-tropospheric jet stream （EAJS） is studied based on the data from the National Center for Environmental Prediction/ National Center for atmospheric Research （NCEP/NCAR） for 1958-2002. The results show that in climatology there is an abrupt northward shift of the EAJS in late July.

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Interannual variation of North china rainfall in rainy season and SSTs in the equatorial eastern Pacific

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Science Bulletin 2005年第18期 103-107页

作者： lu riyu LASG, institute of {3. {3., Chinese Academy of Sciences,beijing 100029, china

The rainfall in North china during rainy sea-son (July and August (JA)) exhibits a strong interannual variability. In this study, the atmospheric circulation and SST anomalies associated with the interannual variation of JA North china rainfall are examined. It is found that on the interannual timescale, the JA North china rainfall is associ-ated with significant SST anomalies in the equatorial eastern Pacific, and the North china rainfall and SST anomaly in the equatorial eastern Pacific correspond to the similar variation of the upper-level westerly jet stream over East Asia. A pos-sible mechanism is proposed for the influence of the SST anomalies in the equatorial eastern Pacific on the North china rainfall.

关键词： North china rainfall in rainy season the upper-level westerly jet stream over East Asia interannual variability SSTs in the equatorial eastern Pacific convection over the western Pacific.

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