Interdecadal variability of summer precipitation in the Three River Source Region: Influences of SST and zonal shifts of the East Asian subtropical westerly jet

Summer precipitation in the Three Rivers Source Region(TRSR)of China is vital for the headwaters of the Yellow,Yangtze,and Lancang rivers and exhibits significant interdecadal variability.This study investigates the influence of the East Asian westerly jet(EAWJ)on TRSR rainfall.A strong correlation is found between TRSR summer precipitation and the Jet Zonal Position Index(JZPI)of the EAWJ from 1961 to 2019(R=0.619,p<0.01).During periods when a positive JZPI indicates a westward shift in the EAWJ,enhanced water vapor anomalies,warmer air,and low-level convergence anomalies contribute to increased TRSR summer precipitation.Using empirical orthogonal function and regression analyses,this research identifies the influence of large-scale circulation anomalies associated with the Atlantic–Eurasian teleconnection(AEA)from the North Atlantic(NA).The interdecadal variability between the NA and central tropical Pacific(CTP)significantly affects TRSR precipitation.This influence is mediated through the AEA via a Rossby wave train extending eastward along the EAWJ,and another south of 45°N.Moreover,the NA–CTP Opposite Phase Index(OPI),which quantifies the difference between the summer mean sea surface temperatures of the NA and the CTP,is identified as a critical factor in modulating the strength of this teleconnection and influencing the zonal position of the EAWJ.

再论中国资本主义萌芽问题及其研究的史学意义——与杨师群先生再商榷

如何看待资本主义萌芽及萌芽发展中的不同阶段,是资本主义萌芽问题研究中的重要问题。以中国资本主义萌芽最终没有发展成为资本主义社会形态为依据否定中国资本主义萌芽的存在,在逻辑上是存在问题的。资本主义萌芽问题研究所具有的国际影响、资本主义萌芽问题研究的学理基础、资本主义萌芽问题研究的史学方法等方面体现出中国资本主义萌芽问题研究的史学意义。

“西化主义”:现代化的误区

现代化是由传统社会向现代社会演进、由农业文明向工业文明嬗变、由落后国家向先进国家变迁的过程。“西化主义”是指非西方社会在走向现代化的过程中，在心理、器物和制度层面都无条件地全盘仿效或移植欧美发达国家的社会思潮。从本世纪６０年代起，“西化主义”概念曾一度被弃置不用。但在最近几年，这一思想又重新抬头，出现了回春景象。因此，如何认识和评价“西化主义”，又成为广大非西方社会所面临的共同问题。本文作为作者《理论与经验：历史视野中的改革与现代化研究》一书的阶段性成果，对“西化主义”思想产生的渊源、演变的轨迹及其主要表现形式等作了深入的探讨，用大量有力的史实说明：“西化主义”是刻意照搬的“拿来主义”，是“西方中心论”的变种，是非此即彼的二维逻辑推断，是现代化的误区；对非西方社会而言，其唯一明智的选择是：从本民族、本国家、本地区的实际出发，以自身的文化作为内在驱动力。

民主社会主义性质辨析

本文旨在通过具体分析比较西欧东欧民主社会主义和科学社会主义两种思想体系的根本区别,通过认真总结东欧演变为民主社会主义的经验教训,揭露民主社会主义的实质,坚定我们科学社会主义的信念。

A dark October in Beijing 2016

In recent years, haze pollution events in Beijing have increased sharply, and the haze pollution of Beijing in October 2016 reached a new high. Meteorological conditions are thought to have influences on the haze occurrence, yet the associated atmospheric circulation of haze in October and why the most severe haze pollution occurred in 2016 is still unclear. Here, the authors show through daily observation and reanalysis data that key regions of North Atlantic and North Pacific sea surface temperature （SST） anomalies may be the main factors for this most severe haze event. Since 2013, the SSTs of these two key regions have increased dramatically and reached a peak, which could have induced the severe haze pollution by affecting the Eurasia teleconnection （EU） and the North Pacific Oscillation, with these factors then providing favorable dynamic and thermodynamic conditions for haze development.

The influence of elevation on soil properties and forest litter in the Siliceous Moncayo Massif,SW Europe

Understanding the effects of elevation and related factors(climate,vegetation) on the physical and chemical soil properties can help to predict changes in response to future climate or afforestation forcings.This work aims to contribute to the knowledge of soil evolution and the classification of forest soils in relation to elevation in the montane stage,with special attention to podzolization and humus forms.The northern flank of the Moncayo Massif(Iberian Range,SW Europe) provides a unique opportunity to study a forest soils catena within a consistent quartzitic parent material over a relatively steep elevation gradient.With increasing elevation,pH,base saturation,exchangeable potassium,and fine silt-sized particles decrease significantly,while organic matter,the C/N ratio,soil aggregate stability,water repellency and coarse sand-sized particles increase significantly.The soil profiles shared a set of properties in all horizons:loamy-skeletal particle-size,extreme acidity(pH-H_2O<5.6) and low base saturation(<50%).The most prevalent soil forming processes in the catena include topsoil organic matter accumulation and even podzolization,which increases with elevation.From the upper to lower landscape positions of wooded montane stage of the Moncayo Massif,mull-moder-mor humus and an UmbrisolCambisol-Podzol soil unit sequences were found.

Analysis of Winterbourne in Daisy Miller

Henry James is one of the greatest novelists, who enjoys great reputation in the English literary world. He spent many years in Europe. Fie had deep and subtle insights into the life of the upper class in America and Europe. He experienced the cultural differences between America and Europe profoundly, which was demonstrated in his literary works. Daisy Miller is one of the representative works of Henry James, reveals his ＂international theme＂, the American innocence in face of European sophistication, In D^dsy Miller, Winterbourne is an undeniable protagonist, embodies both narrative and symbolic meaning. Through his narration and his representative features of the sophistication of European culture, we can gradually realize that it is the inevitable collision between new world and old world that leads to the pathetic ending of Daisy Miller.

The Anomalous European Climates Linked to Different Euro-Atlantic Blocking

The impact on temperature and precipitation anomalies over the European continent of the different action centers of blocking events in the Euro-Atlantic sector was investigated. It was found that the position of the blocking action center in the Euro-Atlantic region seems to dominate European climates. When the center of the blocking action is in the Greenland region, there is a strong negative temperature anomaly over Central and Northern Europe, as well as a strong positive precipitation anomaly over southern Europe. However, there tends to be a strong negative temperature anomaly in the west(east) part of Europe when the center of the blocking action is shifted to the Eastern Atlantic and west Europe(east Europe). In particular, when the blocking action center is closer to the European continent, the fall in temperature becomes more evident over Central and south Europe than over other regions. Moreover, it was found that when the region where the blocking action center exists changes from the Eastern Atlantic and west Europe region to the east Europe region, the existing region of dominant positive precipitation anomalies varies from southwest Europe to southeast Europe and the Middle East.

European Explorers＇ Engagements with Sexuality in Indigenous Cultures： The Forsters＇ Interpretations of Tahitian Sexual Practices

While current analyses of European interpretations of non-western cultures are guided by a modern concept of sexuality, this article argues for a more encompassing, historical awareness by drawing historical constructs of sexuality into the analysis. To illustrate the point, it will analyze the accounts of indigenous sexual practices written by the botanist Johann Reinhold Forster and his son Georg, in the wake of Cook＇s voyages. These accounts differ starkly, even though the authors participated in the same expedition. As the post-structural textual analysis of the text makes apparent, each author has a specific concept of sexuality in mind. These perceptions affirm the change taking place in 18th-century European culture, as analyzed by Foucault. Moreover, the textual analysis strongly suggests that their respective views of sexuality impact upon their interpretations of Tahitian culture at large. As a consequence, the article furthers insight into ＂Western＂ ways of interpreting ＂non-western＂ cultures.

Durban Conference and Carbon Emission Challenge for China

In recent years,with the soaring development of its national strength,China has made the world hear its voice and gained strength in negotiations.However,China is still confronting huge pressure placed by the dominant western countries.During the Durban Conference,three main groups,namely the EU(Europe Union),the Umbrella Group,and the Group of 77 and China,played important roles,among which China is outstanding but is bearing a huge corresponding pressure on carbon emission reduction.China must continue to reinforce the coordination among those emerging developing countries and strive for the status and negotiation rights it deserves.Since energy conservation and emissions reduction is a key component of China's strategy for sustainable development,China should consider the low-carbon economy as an opportunity for development,strongly promote the development of clean energy technology and occupy the international strategic highland of the world economy.

Colonial and Gender Discourses in Modern European Travel Writing About East Asia

This article explains how modern European travelers, particularly European women adventurers, described East Asia. Travel writings that are expected to be truthful are not free from travelers＇ own personal, cultural, social, and political experiences and perceptions. At the turn of the 19th century, Europe was dominated by colonial discourse based on Western-centered textualized or imaginary knowledge of ＂the Orient＇＇1. The imaginary texts affected European travelers. In turn, their travel writings helped substantiate and reinforce the texts. European women travelers, who were in a relatively disadvantageous situation at home, enjoyed going beyond the sexual boundaries imposed on them at home by using their assumed racial superiority in the Orient. However, their marginal position in Western society helped them ponder their own understanding of other peoples and cultures, of themselves, and of their home societies. This article traces not only the surface discourse of travelogues on East Asia, particularly on Korea, but also travel writers＇ inner worlds, focusing on differences between men and women.

＂Collapse＂ of Europe in the Light of Energy Dependence

The issue of the future of Europe is becoming increasingly important what with the depth of the economic crisis that started in 2008. In addition to a continuous growth in the number of the unemployed, the crisis particularly emphasizes the chronic level of energy dependence. The energy saving measures ~energy efficiency）, diversification of sources （stability of supply）, and the creation of substitutes in renewable energy （energy transition）, intertwine with administrative measures and form the response of European countries to the growing energy dependence. At the same time, although facing the threatening warming （or cooling） of the Earth, Europe, as a big advocate of reducing CO2 remains passively dependent on NATO （North Atlantic Treaty Organization） policy in the field of defense in the context of energy dependence. However, for the first time after many decades, Europe and America do not have the same energy, and consequently geo-strategic objective： The US has become energy independent while Europe is chronically energy dependent.

从“西欧中心史观”到“文明形态史观”和“全球史观”20世纪世界历史的理论、方法与编纂实践

《历史研究》自1954年第1期发刊，到2004年第1期的50年来，共发表有关世界历史和中外关系史文章数百篇，从最初重点介绍和研究前苏联东欧社会主义国家、国际共运、民族解放运动开始，到今天已经发展到关注世界范围内的、各国各地区的、从古至今的。

Relationship between zonal position of the North Atlantic Oscillation and Euro-Atlantic blocking events and its possible effect on the weather over Europe

The North Atlantic Oscillation(NAO) exhibited a marked eastward shift in the mid-1970 s. Observations show that the extreme weather events in Europe have emerged frequently in the past decades. In this paper, based upon the daily NAO index, we have calculated the frequency of in-situ NAO events in winter during 1950-2011 by defining the Eastern-type NAO(ENAO) and Western-type NAO(WNAO) events according to its position at the east(west) of 10°W. Then, the composites of the blocking frequency, temperature and precipitation anomalies for different types of NAO events are performed. Results show that the frequency of Euro-Atlantic blocking events is distributed along the northwest-southeast(southwest-northeast) direction for the negative(positive) phase. Two blocking action centers in Greenland and European continent are observed during the negative phase while one blocking action center over south Europe is seen for the positive phase. The action center of blocking events tends to shift eastward as the NAO is shifted toward the European continent. Moreover, the eastern-type negative phase(ENAO) events are followed by a sharp decline of surface air temperature over Europe(especially in central, east, and south Europe), which have a wider and stronger impact on the weather over European continent than the western-type negative phase(WNAO) events do. A double- branched structure of positive precipitation anomalies is seen for the negative phase event, besides strong positive precipitation anomalies over south Europe for ENAO event. The eastern-type and western-type positive phase(ENAO+ and WNAO+) can lead to warming over Europe. A single-branched positive precipitation anomaly dominant in central and north Europe is seen for positive phase events.

Exploring the history of cultural exchange in prehistoric Eurasia from the perspectives of crop diffusion and consumption

The history of cultural exchange in prehistoric Eurasia(CEPE) has been widely investigated. Based on archaeological evidence, this process is thought to date back to at least the early Bronze Age, although details about timings and routes remain unclear. It is likely that CEPE promoted the spread and exchange of crops that originated in different parts of Eurasia; since these remains can be definitely identified and directly dated, they provide ideal research materials to explore the history of CEPE. In this paper, we review the available archaeobotanical evidence and direct radiocarbon dates for crop remains, alongside carbon isotopic data from human bones unearthed from prehistoric sites in Eurasia, in order to investigate the history of the spread of millet crops, and wheat and barley, that were first domesticated in the eastern and western parts of Eurasia during prehistoric times.In combination with other archaeological evidences, we discuss the history of CEPE. Our results suggest that wheat and barley were domesticated in western Asia around 10500 a BP, spread into Europe and western Central Asia before 8000 a BP, and reaching eastern Central Asia and northwestern China between 4500 and 4000 a BP. Data show that both broomcorn and foxtail millet were domesticated in eastern Asia before 7700 a BP, spread into eastern Central Asia between 4500 and 4000 a BP, and into western Asia and Europe prior to 3500 a BP. Wheat, barley, and millet crops were first utilized together in eastern Kazakhstan within Central Asia around 4400 a BP, the region where earliest CEPE is likely to have taken place. These crops were mixedly used mainly in eastern central Asia and northwest China between 4500 and 3500 a BP, and then across the Eurasia before 2200 a BP. The results of this study suggest that transcontinental CEPE might have been initiated during the fifth millennium, before intensifying during the Bronze Age to lay the foundations for the creation of the ancient Silk Road during the Han Dynasty(between 202 BC and 220AD).

How will climate change affect the potential distribution of Eurasian tree sparrows Passer montanus in North America？

Habitat suitability models have been used to predict the present and future potential distribution of a variety of spe- cies. Eurasian tree sparrows Passer montanus, native to Eurasia, have established populations in other parts of the world. In North America, their current distribution is limited to a relatively small region around its original introduction to St. Louis, Missouri. We combined data from the Global Biodiversity Information Facility with current and future climate data to create habitat suitability models using Maxent for this species. Under projected climate change scenarios, our models show that the distribution and range of the Eurasian tree sparrow could increase as far as the Pacific Northwest and Newfoundland. This is potentially important in-formation for prioritizing the management and control of this non-native species [Current Zoology 57 （5）： 648--654, 2011].

Chinese Social Relations ＆ Political Transformations in Historical ＆ Comparative Perspectives： A Preliminary Sketch of New Orientations in Social Science Research

This paper suggests some ways to relate the patterns of Chinese social and political change to those found in European history in order to better understand both. Since European historical experiences provide the material for formulating Western social theories, a comparative historical analysis of China suggests the ways in which Chinese materials can inform and transform more globally conceived social theories.

Global Challenges to Intellectual History： Regional Focus of Intellectual History in the West

The first part of the paper shows that in American and European academia, the field of intellectual history has continued to neglect the world outside of the West. The reasons for this Eurocentric bias are related to lasting hierarchies in the global landscape of historiography. To put it bluntly, Western scholars can afford to ignore historical approaches from other parts of the world, while the opposite is not the case. Whereas fields like subaltern studies have pointed at such problems, these hierarchies （and their historical roots ） have thus far hardly been considered in the debate about the future of intellectual history. In the second part, the paper outlines some important research agendas for the field of global intellectual history. For example, it argues that the transnational spread（ and local adaptation） of Eurocentric ideas since the 19th century remains insufficiently understood. The same is true for the changing facets of international hierarchies of knowledge, which have continued to influence historical scholarship around the world up until the present day.

Joining Hands for New Splendor In the New Era

I am delighted to visit Spain,a beautiful and richly endowed kingdom,at the kind invitation of King Felipe VI.This will be the first stop of my trip that takes me to Europe and Latin America for state visits and for the G20Buenos Aires Summit.