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Advances in Atmospheric Sciences 2002年第5期19卷 914-926页

作者： Jianjun Xu Johnny C.L Chan Department of Physics&Materials Science City University of Hong KongChina Department of Earth&Environmental Science New Mexico Tech801 Leroy PlaceSocorro87801 New MexicoUSA

Based on the method of rotated principal component (RPC) analysis and wavelet transforms, the winter precipitation from 36 stations over China for the period 1881-1993 is examined. The results show that the three leading space-time modes correspond, in sequence, to winter rainfall anomalies over the reaches of the Yangtze River, the bend of the Yellow River, and the northeastern region of China. The three modes exhibit interannual oscillations with quasi-biennial and 8-year periods as well as interdecadal oscillations with 16- and 32-year periods. The interannual oscillation (precipitation over East China increases noticeably. The linkage between the rainfall over China and the SLP anomalies apparently results from the strength of the East Asian winter monsoon and its associated temperature and moisture advection.

关键词： wavelet transform winter precipitation China SLP

Analysis on the relationship between winter precipitation and the annual variation of horse stomach fly community in arid desert steppe, Northwest China (2007–2019)

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Integrative Zoology 2022年第1期17卷 128-138页

作者： Heqing HUANG Ke ZHANG Boru ZHANG Shanhui LIU Hongjun CHU Yingjie QI Dong ZHANG Kai LI Key Laboratory of Non-Invasive Research Technology for Endangered Species School of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina Chongqing Academy of Environmental Science ChongqingChina Qinhuangdao Forestry Bureau QinhuangdaoChina Office of Educational Administration Beijing Language and Culture UniversityBeijingChina Institute of Forest Ecology Xinjiang Academy of ForestryUrumqiChina Mt.Kalamaili Ungulate Nature Reserve ChangjiXinjiangChina

Gasterophilus *** been found to be widespread in reintroduced Przewalski’s horses in the Kalamaili Nature Reserve(Northwest China).However,data on the annual variation in Gasterophilus infections are *** analyze the epidemiological features and determine the cause of the annual variation in Gasterophilus infections,we treated 110 Przewalski’s horses with ivermectin and collected Gasterophilus larvae from fecal samples each winter from 2007 to *** 110 Przewalski’s horses studied were found to be infected by Gasterophilus spp.,and a total of 141379 larvae were *** species of Gasterophilus were identified with the following prevalence:***(100%),***(96.36%),***(94.55%),***(56.36%),***(59.09%),and ***(3.64%).The mean infection intensity of Gasterophilus *** in Przewalski’s horses was 1285±***(92.96%±6.71%)was the most abundant *** intensity of Gasterophilus spp.(r=–0.561,Pwinter *** findings confirmed that,in the Kalamaili Nature Reserve,gasterophilosis is a severe parasitic disease in Przewalski’s *** precipitation at the beginning of the year can indirectly affect the intensity and composition of Gasterophilus *** Przewalski’s horses at the end of the ***,the water-related ecological regulation should be carried out to help reduce the parasite infection of Przewalski’s horses.

关键词： annual infection arid desert steppe Gasterophilus Przewalski’s horses winter precipitation

Decadal Anomalies of winter precipitation over Southern China in Association with El Nio and La Nia

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Journal of Meteorological Research 2014年第1期28卷 91-110页

作者：袁媛李崇银杨崧 Laboratory of Climate Studies of CMA National Climate Center LASG Institute of Atmospheric PhysicsChinese Academy of Sciences Institute of Meteorology PLA University of Science and Technology School of Environmental Science and Engineering Sun Yat-Sen University

Using multiple datasets, this paper analyzes the characteristics of winter precipitation over southern China and its association with warm and cold phases of E1 Nifio-Southern Oscillation during 1948 2011. The study proves that E1 Nifio is an important external forcing factor resulting in above-normal winter precipitation in southern China. The study also reveals that the impact ofLa Nifia on the winter precipitation in southern China has a decadal variability. During the winter of La Nifia before 1980, the East Asian winter monsoon is stronger than normal with a deeper trough over East Asia, and the western Pacific subtropical high weakens with its high ridge retreating more eastward. Therefore, anomalous northerly winds dominate over southern China, leading to a cold and dry winter. During La Nifia winter after 1980, however, the East Asian trough is weaker than normal, unfavorable for the southward invasion of the winter monsoon. The India-Burma trough is intensified, and the anomalous low-level cyclone excited by La Nifia is located to the west of the Philippines. Therefore, anomalous easterly winds prevail over southern China, which increases moisture flux from the tropical oceans to southern China. Meanwhile, La Nifia after 1980 may lead to an enhanced and more northward subtropical westerly jet over East Asia in winter. Since southern China is rightly located on the right side of the jet entrance region, anomalous ascending motion dominates there through the secondary vertical circulation, favoring more winter precipitation in southern China. Therefore, a cold and wet winter, sometimes with snowy and icy weathers, would occur in southern China during La Nifia winter after 1980. Further analyses indicate that the change in the spatial distribution of sea surface temperature anomaly during the La Nifia mature phase, as well as the decadal variation of the Northern Hemisphere atmospheric circulation, would be the important reasons for the decadal variability of

关键词： East Asian winter monsoon winter precipitation E1 Nifio and La Nifia asymmetry decadalvariability

A Hybrid Dynamical-Statistical Approach for Predicting winter precipitation over Eastern China

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Acta meteorologica Sinica 2011年第3期25卷 272-282页

作者：郎咸梅 International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of Sciences

Correlation analysis revealed that winter precipitation in six regions of eastern China is closely related not only to preceding climate signals but also to synchronous atmospheric general circulation fields. It is therefore necessary to use a method that combines both dynamical and statistical predictions of winter precipitation over eastern China （hereinafter called the hybrid approach）, in this connection, seasonal real-time prediction models for winter precipitation were established for the six regions. The models use both the preceding observations and synchronous numerical predictions through a multivariate linear regression analysis. To improve the prediction accuracy, the systematic error between the original regression model result and the corresponding observation was corrected. Cross-validation analysis and real-time prediction experiments indicate that the prediction models using the hybrid approach can reliably predict the trend, sign, and interannual variation of regionally averaged winter precipitation in the six regions of concern. Averaged over the six target regions, the anomaly correlation coefficient and the rate with the same sign of anomaly between the cross-validation analysis and observation during 1982-2008 are 0.69 and 78%, respectively. This indicates that the hybrid prediction approach adopted in this study is applicable in operational practice.

关键词： winter precipitation dynamical and statistical predictions multivariate linear regression analysis seasonal prediction model hybrid approach

A tripole winter precipitation change pattern around the Tibetan Plateau in the late 1990s

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Atmospheric and Oceanic Science Letters 2022年第6期15卷 15-21页

作者： Yali Zhu Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Key Laboratory of Meteorological Disaster/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Classical monsoon dynamics considers the winter/spring snow amount on the Tibetan Plateau(TP)as a major factor driving the East Asian summer monsoon(EASM)for its direct influence on the land-sea thermal ***,the TP snow increased and decreased after the late 1970s and 1990s,respectively,accompanying the two major interdecadal changes in the *** studies have explored the possible mechanisms of the EASM interdecadal variations,and change in TP snow is considered as one of the major drivers,few studies have illustrated the underlying mechanisms of the interdecadal changes in the winter TP *** study reveals a tripole pattern of change,with decreased winter precipitation over the TP and an increase to its north and south after the late *** analyses through numerical experiments demonstrate that the tropical Pacific SST changes in the late 1990s can robustly affect the winter TP precipitation through regulating the Walker and regional Hadley *** cooling over the tropical central-eastern Pacific can enhance the Walker circulation cell over the Pacific and induce ascending motion anomalies over the Indo-Pacific *** anomalies further drive descending motion anomalies over the TP and ascending motion anomalies to the north through regulating the regional Hadley ***,the positive-negative-positive winter precipitation anomalies around the TP are *** study improves the previously poor understanding of TP climate variation at interdecadal timescales.

关键词： winter precipitation Tibetan plateau Interdecadal change East asian westerly jet stream Westerly-monsoon interaction

A New Statistical Downscaling Scheme for Predicting winter precipitation in China

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Atmospheric and Oceanic Science Letters 2013年第5期6卷 332-336页

作者： LIU Ying FAN Ke YAN Yu-Ping Laboratory for Climate Studies National Climate Center China Meteorological Administration Institute of Atmospheric Physics Chinese Academy of Sciences Institute of Atmospheric Physics Chinese Academy of Sciences

An effective statistical downscaling scheme was developed on the basis of singular value decomposition to predict boreal winter(December-January-February)precipitation over *** variable geopotential height at 500 hPa(GH5)over East Asia,which was obtained from National Centers for Environmental Prediction’s Coupled Forecast System(NCEP CFS),was used as one predictor for the *** preceding sea ice concentration(SIC)signal obtained from observed data over high latitudes of the Northern Hemisphere was chosen as an additional *** downscaling scheme showed significantly improvement in predictability over the original CFS general circulation model(GCM)output in cross *** multi-year average spatial anomaly correlation coefficient increased from–0.03 to 0.31,and the downscaling temporal root-mean-square-error(RMSE)decreased significantly over that of the original CFS GCM for most China ***,large precipitation anomaly centers were reproduced with greater accuracy in the downscaling scheme than those in the original CFS GCM,and the anomaly correlation coefficient between the observation and downscaling results reached～0.6 in the winter of 2008.

关键词： statistical downscaling winter precipitation China Coupled Forecast System

The climate shift of interannual variability of winter precipitation over China

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The climate shift of interannual variability of winter preci...

Soil drainage combined with tillage in winter season reduces more global warming p otential of a double-rice field in China

第33届中国气象学会年会

作者：葛敬文贾晓静 Hai Lin 浙江大学地球科学学院加拿大环境部

The interdecadal change of the leading mode of the mean winter precipitation over China has been investigated using observational data for the period from 1960 to *** leading empirical orthogonal function（EOF）mode（EOF1）of the winter precipitation over China displays a mono-sign pattern over southeastern China,accounting for 49.7%of the total variance in the *** the El Ni?o-Southern Oscillation（ENSO）and the East Asian winter monsoon（EAWM）can impact EOF1.A positive（negative）EOF1 is accompanied by warm（cold）ENSO events and weak（strong）EAWM,and the latters can cause anomalous southerlies（northerlies）along the coast of southeastern China,accompanied by the transportation of water vapor from the Bay of Bengal and the South China Sea favoring a wet（dry）winter over southeastern *** abrupt transition of the EOF1 is observed around the ***,the data are divided into two subperiods,i.e.,1960 to 1987（P1）and 1988 to 2009（P2）.Significant differences in the large scale atmospheric circulation and sea surface temperature（SST）anomalies associated with EOF1 during these two subperiods are ***1 is closely related to the mid-to high-latitude atmospheric circulation in P1,while its relationship to the tropics obviously increases during *** partial regression analysis results show that the interdecadal change of EOF1 is caused by both the interdecadal changes of the EAWM and ENSO around the *** P1,the lower-level anomalous southerlies along the coastal southeastern China accompanied by water vapor transportation that causes above-average precipitation are related to an anti-cyclonic system centered over the mid-latitude western North Pacific associated with *** P2,the influence of the EAWM is weaker,and the southerly anomaly over the coastal southeastern China is mainly caused by the anticyclone over Philippines,which is related to the ENSO.

关键词： Interdecadal change winter precipitation EAWM ENSO

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Soil drainage combined with tillage in winter season reduces...