Street Patterns Research Articles

Impact of the Eastward Shift in the Negative‐Phase NAO on Extreme Drought Over Northern China in Summer

AbstractThe frequency of extreme drought events in northern China has increased since the mid‐1990s, and such a decadal anomalous trend may have a vital influence on national economics and food supply. Based on the analysis of observational datasets and experiments conducted by a linear baroclinic model, this study claims that the intraseasonal circulation anomalies related to extreme drought are linked to the eastward shift in the negative phase of the summer North Atlantic Oscillation (SNAO). When the SNAO is in a negative phase, the cyclonic eddy‐driven jet can enhance the eastward extension of the North Atlantic jet stream (NAJS), contributing to a closer connection between the NAJS and the Asian‐African jet stream and enhancing the waveguide. The cyclonic eddy in the exit of the jet stream excites anomalous Rossby wave energy that originates from the NAJS exit and spreads to the Caspian Sea, Mongolia, and northern China; this associated wave train, which is similar to the Silk Road Pattern (SRP), enhances the anticyclonic anomaly over northern China, establishing a pronounced link with extreme drought in northern China. Thus, the negative phase of the SNAO may be a contributing driver of extreme drought in northern China.

Built Environment Approaches to Increase Physical Activity: A Science Advisory From the American Heart Association.

Engaging in regular physical activity is one of the most important things people can do to improve their cardiovascular health; however, population levels of physical activity remain low in the United States. Effective population-based approaches implemented in communities can help increase physical activity among all Americans. Evidence suggests that built environment interventions offer one such approach. These interventions aim to create or modify community environmental characteristics to make physical activity easier or more accessible for all people in the places where they live. In 2016, the Community Preventive Services Task Force released a recommendation for built environment approaches to increase physical activity. This recommendation is based on a systematic review of 90 studies (search period, 1980-June 2014) conducted using methods outlined by the Guide to Community Preventive Services. The Community Preventive Services Task Force found sufficient evidence of effectiveness to recommend combined built environment strategies. Specifically, these strategies combine interventions to improve pedestrian or bicycle transportation systems with interventions to improve land use and environmental design. Components of transportation systems can include street pattern design and connectivity, pedestrian infrastructure, bicycle infrastructure, and public transit infrastructure and access. Components of land use and environmental design can include mixed land use, increased residential density, proximity to community or neighborhood destinations, and parks and recreational facility access. Implementing this Community Preventive Services Task Force recommendation in communities across the United States can help promote healthy and active living, increase physical activity, and ultimately improve cardiovascular health.

Pattern and Extent of Street Food Consumption in Hohoe, Volta Region, Ghana: A Community-Based Cross-Sectional Survey

Background. For most people in developing countries, street food is a major source of sustenance, and Ghana is no exception. Street food vending has seen tremendous growth in Ghana as a result of the insurgence of urbanisation. Despite being one of the largest sectors of national economy in terms of employment and sales of food, very little is known about street food consumption patterns in Ghana. The current study explored the patterns and extent of street food consumption in the Hohoe township. Methods. A cross-sectional design which recruited 403 subjects through a multistage sampling technique. A semistructured questionnaire was used to gather information on demographics, types of street foods, extent of street food consumption, safety concerns, and diversity of street foods patronised. Means, standard deviations, and Chi-square tests were used to determine the association between selected variables at <0.05 level of significance. Results. The top 5 foods mostly patronised by respondents are porridge foods-Koko (17.9%), rice and stew (17.4%), banku (12.6%), waakye (11.5%), and kenkey (8.7%) with porridge foods consumed almost on a daily basis. Convenience (37.2%) and affordability (17.1%) greatly influenced the choice of street foods among consumers. Occupation and the level of education are strongly correlated with the concern for safety of street foods {(X2 = 17.3094, P<0.008); (X2 = 17.1731, P<0.002)}. The dietary diversity score of most respondents was in the high tercile (77.7%) (≥6 food groups), whilst the cereals dominate the food group mostly consumed by respondents. Conclusion. The study suggests that patronising street food is very high in Hohoe municipality, irrespective of the gender, occupation, or educational level. As an “informal” sector of food business, street foods often escape formal inspection and control. They can, therefore, both be the source of food safety problems and contribute to the deterioration of environmental hygiene. This is a call on policy makers and regulators to take a critical look at the sector.

Influence of Community Design and Sociodemographic Characteristics on Teleworking

The traffic on the roads in many countries has been increasing in recent decades, and the increases in congestion and carbon emission are contributing significantly to climate change. To minimize these adverse effects, the use of more sustainable travel modes, such as public transit, walking, bicycling, carpool and ridesharing, has been widely promoted. Apart from these travel modes, alternatives, such as teleworking, which reduces commute trips, should also be promoted. The objective of this study is to identify different neighborhood design and social characteristics that are associated with teleworking. In this case study, a multiple regression model is applied to 2011 census data and road infrastructure data of 185 communities from the city of Calgary in Canada. In addition, a random intercept model is estimated to account for unobserved heterogeneity. We find that different street patterns, geographical size, land use, mass rapid transit, and road types have a significant effect on teleworking or working-at-home and should be considered when designing new communities. We also find several significant sociodemographic characteristics, including family size, marital status, children, housing type and language. Policy implications based on this research are then provided.

An Interdecadal Change of the Boreal Summer Silk Road Pattern around the Late 1990s

AbstractThe Silk Road pattern (SRP) is a well-known teleconnection pattern along the upper-level westerly jet over the Eurasian continent during boreal summer. The SRP has experienced an interdecadal change around the late 1970s. The present study identified a new change of the SRP around the late 1990s, which is characterized by significant weakening and zonal phase shift of the major centers of the SRP during the recent decades. The recent reshaping of the SRP is attributed to an enhanced impact of precipitation anomalies over the northeastern Indian summer monsoon (ISM), which is associated with the leading mode change of the ISM precipitation anomalies around the late 1990s. The interdecadal weakening of the upper-level westerly jet over central and East Asia also favors the southward movement of the SRP during recent periods. The differences of the features, climate impact, and causes related to the recent SRP change from those related to the SRP change around the late 1970s are also contrasted in this study.

Re-locating the identity of Amman’s city through the hybridization process

PurposeThe purpose of this paper is to define the identity, city identity and architectural identity; to review, analyze and synthesize different pieces from literature to explore and define the factors that shape the city identity; to define the strategies of hybridization process that can be used to re-locate (re-define) the city identity; to examine the most effective factors that shape the identity of Amman city from various perspectives, to examine the relationships/interrelationships between all the factors that shape any city identity from the designers’ perspective, finally, to apply the strategies of hybridization process to re-locate (re-define) Amman’s city identity.Design/methodology/approachThis research used two research methods to collect data as follows: literature review, content analysis and face-face questionnaire. Descriptive statistics were used to examine the most effective factors that shape the Amman’s identity from different perspectives. The Pearson product-moment correlation coefficient (Pearson r) was computed to assess the relationships between all factors that shape the identity of any city from the perspective of Jordanian designers and experts.FindingsThis research concluded that the factors that shape the city identity are cultural factors (socio-cultural, historical, economical and globalization factors), environmental factors (geographic, climate and building materials factors) and urban and architectural factors (spatial design organization, architectural style, open spaces and parks, urban structure factors). Additionally, the six urban development factors that responsible for the hybridization process in a city are new architectural typology and new special configuration, urban edges and hybrid textures, public hybridization open spaces, roads highway-scapes, urban redevelopment through super sites by star architects and downtown urban developments. This research found that there are different perspectives about the definition and factors that shape the identity of Amman’s city because of differences in cultures, experiences, knowledge, education level and personal preferences. The city identity is not a constant concept. It is changed according to time, place, people, culture, global trends, economic status and experience. Moreover, the correlation results revealed that the relationships/interrelationships between all the factors that shape the identity of any city have strong/very strong positive linear associations and significant relationships (r > 0.89).Practical implicationsGreater Amman Municipality (GAM) should provide a vision to redefine the identity of Amman city and control over the development pressure, built form and image of the city. This vision should be based on research, analysis and adoption of the most effective road map. GAM and all stakeholders should establish and enforce using specific architectural styles, urban design guidelines, building codes, policy tools and land use regulations to re-define the city identity. GAM should review, assess, approve and supervise all development projects through all design and construction phases especially in sensitive areas. GAM should focus on building capacity, empower its architects and planners, and re-organize (re-structure) their units and administrations especially planning and licensing departments to improve the city image and guide development. This research recommended that architects should design new, diverse and innovative architectural concepts, typologies and spatial configurations. Rapid development and new edges should be planned, designed and managed from the parts to the whole. The heterogeneous landscape and everyday activities will improve the vitality of urban and open public spaces and form of public culture. Architects and star architects ought not to make a clear and sharp separation between old and new development, architectural styles and typologies. Architects and urban designers ought to design hybrid physical urban environments, urban morphology, urban multi-functional activities, mix-use buildings, open spaces for social life, street patterns and furniture, squares, architectural style and typologies, spatial connectivity, green spaces and landscape entities. The designers and planners should consider how to create a city for living, working and recreation.Originality/valueThis research defined the identity, city identity, architectural identity and the factors that may shape the city identities. This research proposed and used the hybridization process as a tool to re-locate (re-define) the identity of Amman city and any city to be more obvious. Additionally, this research examined the relationships/interrelationships between the factors that shape the city identity.

Large-Scale Atmospheric Circulation Related to Frequent Rossby Wave Breaking near Japan in Boreal Summer

AbstractRossby wave propagation along the Asian jet during boreal summer, such as the Silk Road pattern, frequently causes wave breaking near the Asian jet exit region. This study examines the statistical relationship between interannual variability of the Rossby wave breaking frequency near Japan and large-scale atmospheric circulation during the boreal summer. The Rossby wave breaking frequency in the midlatitudes climatologically shows its maximum near Japan, and significantly increases during La Niña years. The upper-tropospheric circulation regressed onto the Rossby wave breaking frequency near Japan in August shows large-scale anomalous convergence from the tropical central to eastern Pacific and divergence around the Indian Ocean. The consequent northward anomalous divergent wind over Eurasia contributes to enhancement and northward shift of the Asian jet. The Asian jet also shows meridional meandering with a phase of anomalous anticyclonic circulation near Japan accompanied by the frequent Rossby wave breaking, which is associated with the Silk Road pattern. The frequent Rossby wave breaking is related to southwestward intrusion of anomalous low potential temperature air mass toward the subtropical western North Pacific associated with an enhanced mid-Pacific trough. West of the southwestward cold-air intrusion, enhanced cumulus convection is seen around the northern Philippines, and the Pacific–Japan pattern is significantly seen in the lower troposphere. This result is consistent with a previous study that revealed a linkage mechanism between the Rossby wave breaking near Japan and the Pacific–Japan pattern through dynamically induced ascent resulting in an intrusion of high potential vorticity associated with the Rossby wave breaking.

Collision Avoidance Method Using Vector-Based Mobility Model in TDMA-Based Vehicular Ad Hoc Networks

The rapid development of wireless technology has accelerated the development of Vehicular Ad Hoc Networks (VANETs) to support accident prevention and the safety of a vehicle driver. VANET is a form of Mobile Ad Hoc Network (MANET), and it differs from MANET in that the network topology of a VANET changes dynamically in response to the high mobility of a vehicle and the unstable link quality due to various types of road patterns. Since most access and merging conflicts occur due to vehicle movement patterns and traffic conditions, the collision rate can be reduced if each vehicle can predict the location, movement direction, and resource occupancy information of other vehicles. In this paper, we propose a collision avoidance method based on the vehicle mobility prediction model in TDMA-based VANET. The proposed algorithm allocates time-slots of TDMA to avoid access and merging collisions by predicting the mobility of nearby vehicles using control time-slot occupancy information, vehicle ID, hop information, vehicle movement direction, and longitude and latitude of a vehicle. Simulation results show that the proposed algorithm can reduce access and merging collision rates compared with other legacy algorithms, and the performance gain of the proposed algorithm is enhanced in road environments when traffic density is high and where vehicles have high mobility and change their travel directions frequently.

Neighborhood Dynamics and Long‐Term Change

Patterns of change in neighborhoods can be discordantly different, even within the same city district. A little understood factor in how urban neighborhoods form and grow is structural inertia, which is the tendency of an urban area to resist change due to its existing physical and socio‐economic fabric. This study explores how patterns of buildings, plots, blocks, and streets affect change or inertia in neighborhoods over time. We integrate Conzenian morphology and space syntax approaches within a geographic information system (GIS) framework to study two historic neighborhoods in Charlotte and Raleigh, N.C. at four points in time over a 96‐year span. Aerial images, historic maps, and GIS sources help to create spatial configuration and building data for each time period. We then analyze these data to identify statistical and map‐pattern morphological and syntactic relationships both in the aggregate and in detail. Our research finds that most of the independent variables of block size, plot size, building footprint, global integration, local integration, and connectivity predicted long‐term change measured in building inventory in almost every occurrence. Our study also suggests design implications and possible future tools and research for measuring change and its relation to the physical characteristics of our cities.

Assessment of the Teleconnection Patterns Affecting July Precipitation in China and Their Forcing Mechanisms in the Met Office Unified Model

AbstractIn this study, we evaluate the ability of the MetUM to reproduce the Silk Road (SR) and Europe–China (EC) teleconnection patterns and their relationship with precipitation over China. The SR and EC patterns are the main modes of interannual variability of July upper-tropospheric meridional wind. The three main factors to the formation of these patterns are analyzed: 1) the tropical precipitation anomalies, which act as a forcing mechanism; 2) the emission of Rossby waves in the Mediterranean–Caspian Sea region; and 3) the basic state of the tropospheric jet over Eurasia. It was found that the model has some difficulty reproducing the main modes of variability in atmosphere-only mode (SR and EC pattern correlation of 0.31 and 0.54, respectively) with some improvement in coupled mode (pattern correlations of 0.56 and 0.44, respectively). Relaxation experiments were used to assess the impact that improving circulation in key regions has on the teleconnections. It was found that nudging wind and temperatures in the forcing regions within the tropics improved the Silk Road pattern whereas nudging in the region where the jet transitions between the North Atlantic Ocean and Eurasian continent—correcting the basic state—had the most impact on the EC teleconnection pattern. This suggests that while the Silk Road pattern is more sensitive to changes in the forcing, the Europe–China pattern is more sensitive to the basic state.

Spatial inequality of bus transit dependence on urban streets and its relationships with socioeconomic intensities: A tale of two megacities in China

The dependence of urban bus transit on their covered streets is expected to be significant and heterogeneous in megacities. Using a bipartite network approach, we develop several weighted centrality-based connectivities to quantify the degree of dependencies of urban bus transit on streets. Two megacities with different road patterns, i.e., Beijing and Shanghai in China are taken as examples to depict comparatively spatial inequalities of the centrality-based dependencies at both local and global scales. Then, a series of spatial cross-section regression models are introduced to explore the colocation relationships between the dependencies of bus transit and urban socioeconomic intensities. The methodology of kernel density estimation (KDE) is used to convert all data with different scales into the same unit of measurement. Results indicate that there are significant statistical and spatial inequalities of the centrality-based dependencies of bus transit on urban streets. These inequalities with evident hierarchies, variances and clusters were validated by statistical analysis including power-law function, rank-size distribution, multiple variance indices, together with Global Moran's I. Besides, a majority of bus transit rely heavily on minor streets concentrating on circumferential expressways in central urban areas and radial highways oriented to outer suburbs under industrial or residential suburbanization. The unequal distribution is found to be strongly related to population, nighttime light intensity, transport-related services, and commercial and leisure services by the spatial regression models. A good spatial matching between bus routes' dependencies and socioeconomic activities intensities is found both in these two megacities.

Evolution, density and completeness of OpenStreetMap road networks in developing countries: The case of Iran

OpenStreetMap (OSM) is a volunteered platform designed to provide up-to-date and freely available geographic information data. OSM is known as one of the most extensively used instances of Crowdsourcing Geographic Data (CSGD)/Crowdsourced Geographic Information (CGI), Volunteered Geographic Information (VGI), or the Neogeography paradigm. Economically, OSM development can be beneficial for governments, especially in developing countries such as Iran, where financial support is limited. This paper analyzes the spatial pattern, evolution, density, and diversity of OSM road (OSMr) networks in Iran between 2008 and 2016 and looks to find casual relations between the OSM and census statistics. This is due to the fact that OSMr completeness reflects the importance of OSM data in human life. The diversity of OSM roads further reflects the concerns, requirements, and worthiness of clients about different roads’ information. The results show that the road network in Iran considerably increased from 2008 to 2016, with road length increasing to 489,400 km in 2016 from 4300 km in 2008. In addition, road density grew while road diversity and evenness declined, which could be due to an increase in main roads. These results propose a more considerable need for a more comprehensive approach using VGI to supplement gaps in authoritative data in developing countries.

THE RELATIONSHIP OF PHYSICAL FITNESS TOWARDS GAIT SPEED IN ELDERLY IN THE EAST DENPASAR SUMERTA KELOD VILLAGE

Someone who has experienced an increase in age usually called the elderly. The health of the elderly population must be a concern because of the impact of aging, the elderly experience many changes in terms of structure and function of the body, mental and psychosocial. One that affects the health of the elderly is physical fitness. will decrease. One component of physical fitness related to motor skills is speed. In the elderly, there is a change in road pattern, where the speed decreases. Measuring the speed of walking in the elderly is one way to assess and monitor functional status and overall health in the elderly. The purpose of this study was to determine the relationship of physical fitness with gait speed in the elderly in the Sumerta Kelod Village. The research method used was analytic observational with the cross-sectional design carried out in March - April 2019. Sampling was done by purposive sampling technique with a sample of 40 people. The dependent variable measured is the gait speed with 4 Meters Gait Speed ??Test. The independent variable measured is physical fitness using the 2 Minutes Step Test. Obtained research results with a p-value of 0.0 (p < 0.05). So it can be concluded that there is a relationship between physical fitness towards gait speed in the elderly in the East Denpasar Sumerta Kelod Village.

Social Sustainability in the Use of Public Space

Public space is a bone of contention between different groups that try to impose their own values and interests. Both the way of devising the pattern of roads and their names, monuments, architectural works, and the uses and transits given to all these elements, result in a subjective construction that when imposed unilaterally or in a context of plurality consensus, give rise to social conflict or sustainability in relations, exchanges and coexistence within the “polis”. A review of the manner in which the public space of the city of Temuco has been organized can provide an intimation for, on one hand, understanding the conflicts arising therein, and, on another, thinking of social sustainability solutions to those conflicts where interacting groups can identify with and feel represented by that public space.

North Atlantic Modulation of Interdecadal Variations in Hot Drought Events over Northeastern China

AbstractBased on the long-term reanalysis datasets and the multivariate copula method, this study reveals that the frequency of summer hot drought events (SHDEs) over northeastern China (NEC) shows interdecadal variations during 1925–2010. It is revealed that the summer sea surface temperature (SST) over the North Atlantic has a significant positive correlation with the frequency of SHDEs over NEC on the decadal time scale, indicating a potential influence of the Atlantic multidecadal oscillation (AMO). Further analyses indicate that during the positive phases of the AMO, the warming SST over the North Atlantic can trigger a stationary Rossby wave originating from the North Atlantic, which splits into two wave trains propagating along two different routes. One is a zonally orientated wave train that resembles the Silk Road pattern, whereas the other is an arching wave train that resembles the polar–Eurasian pattern. A negative (positive) phase of the Silk Road pattern (polar–Eurasian pattern) may result in the weakened westerly wind along the jet stream, the downward vertical motion, and the anomalous positive geopotential center over NEC, providing favorable conditions for precipitation deficiency and high temperature and resulting in increased SHDEs. Thus, the Silk Road pattern and the polar–Eurasian pattern serve as linkages between the AMO and SHDEs over northeastern China in summer on the interdecadal time scale. Model simulations from CAM4 perturbed with warmer SST in the North Atlantic show precipitation deficiency and high temperature conditions over northeastern China in summer, supporting the potential impacts of the North Atlantic SST on SHDEs over northeastern China. The results suggest that the phase of the AMO should be taken into account in the decadal prediction of SHDEs over northeastern China in summer.

Impact of the September Silk Road Pattern on the South China Sea summer monsoon withdrawal

AbstractThe Silk Road Pattern (SRP) is the dominant teleconnection in the upper troposphere and is closely linked to the Asian summer monsoon in both India and subtropical East Asia. This study reveals a close interannual relationship between the SRP in September and the South China Sea (SCS) summer monsoon (SCSSM) withdrawal. During positive phases of the September SRP (characterized by negative geopotential height anomalies over eastern Europe and central China and positive geopotential height anomalies over western Europe, western and central Asia, and Northeast Asia), withdrawal of the SCSSM tends to be later than normal. The September SRP could impact the SCSSM withdrawal via modulating atmospheric circulation anomalies over the SCS. In particular, the notable low‐level cyclonic anomaly over central China related to the positive phase of the September SRP induces significant southwesterly wind anomalies over the northern SCS, which favour a late withdrawal of the SCSSM. This study suggests that besides the tropical factors that have been identified by previous studies, the climate systems over mid‐latitudes may also play an important role in contributing to interannual variability of the SCSSM withdrawal.

Dynamic mechanisms of summer Korean heat waves simulated in a long‐term unforced Community Climate System Model version 3

AbstractWe investigate the natural variability of summer Korean heat waves through a long‐term (500 year) unforced simulation using the Community Climate System Model version 3. A total of 82 extreme heat wave frequency (HWF) years are identified with positive barotropic geopotential height (GPH) anomalies over the Korean Peninsula. These anomalies represent the most important atmospheric pattern that causes Korean heat waves via adiabatic warming by anomalous subsidence. From a composite analysis of the extreme Korean HWF years, the silk road pattern (SRP) and central Pacific (CP) sea surface temperature (SST) anomalies are selected as the driving factors of extreme Korean heat waves. The positive SRP is a west–east upper‐level Rossby wave train from the North Atlantic to East Asia under which positive barotropic GPH anomalies develop over the Korean Peninsula, thereby producing extreme heat waves. Cold CP SST anomalies induce cyclonic circulation and enhance convection over the subtropical western North Pacific through wind–evaporation–SST feedback, thereby acting as a source of the Pacific–Japan teleconnection pattern. They also cause positive barotropic GPH anomalies over the Korean Peninsula and intensify surface warming.

Reinforcing identity: Bringing the new face of Malioboro Historic Place, Yogyakarta, Indonesia

The significant character of architecture for the majority places in the world will shape unique identity of place. Malioboro Street is a main commercial, historic and cultural corridor in the historic city of Yogyakarta, Indonesia. For couple of years, because of the modern development and economic reasons, the unique characters of buildings in Malioboro was going to fade away, covered mostly by commercial signboard, and some others had a different appearance from street walls pattern. This paper aims to examine to what extent the changes in the character of Malioboro street facades before and after the interference from the local government and how far the commercial signboard ‘hides’ the uniqueness of the building facades before and after the government initiatives was published. A qualitative method is carried out to examine to what extent the modernity and commercial interests influence the continuity of typical building facades in Malioboro Street. This method attempts to measure the degree of continuity in facade of significant buildings through calculation of the coverage percentage and placement of commercial signboard. The result shows there are significant positive change in bringing back the identity of Malioboro regarding the type, size, and placement of building façade commercial signboard.

A Hybrid Method to Incrementally Extract Road Networks Using Spatio-Temporal Trajectory Data

With the rapid development of urban traffic, accurate and up-to-date road maps are in crucial demand for daily human life and urban traffic control. Recently, with the emergence of crowdsourced mapping, a surge in academic attention has been paid to generating road networks from spatio-temporal trajectory data. However, most existing methods do not explore changing road patterns contained in multi-temporal trajectory data and it is still difficult to satisfy the precision and efficiency demands of road information extraction. Hence, in this paper, we propose a hybrid method to incrementally extract urban road networks from spatio-temporal trajectory data. First, raw trajectory data were partitioned into K time slices and were used to initialize K-temporal road networks by a mathematical morphology method. Then, the K-temporal road networks were adjusted according to a gravitation force model so as to amend their geometric inconsistencies. Finally, road networks were geometrically delineated using the k-segment fitting algorithm, and the associated road attributes (e.g., road width and driving rule) were inferred. Several case studies were examined to demonstrate that our method can effectively improve the efficiency and precision of road extraction and can make a significant attempt to mine the incremental change patterns in road networks from spatio-temporal trajectory data to help with road map renewal.

Impact of late spring Siberian snow on summer rainfall in South-Central China

Located in the Yangtze River Valley and surrounded by mountains, South-Central China (SCC) frequently suffered from natural disasters such as torrential precipitation, landslide and debris flow. Here we provide corroborative evidence for a link between the late spring (May) snow water equivalent (SWE) over Siberia and the summer (July–August, abbr. JA) rainfall in SCC. We show that, in May, anomalously low SWE over Siberia is robustly related to a large warming from the surface to the mid-troposphere, and to a stationary Rossby wave train from Siberia eastward toward the North Atlantic. On the one hand, over the North Atlantic there exhibits a tripole pattern response of sea surface temperature anomalies in May. It persists to some extent in JA and in turn triggers a wave train propagating downstream across Eurasia and along the Asian jet, as the so-called Silk Road pattern (SRP). On the other hand, over northern Siberia the drier soil occurs in JA, accompanied by an overlying anomalous anticyclone through the positive feedback. This anomalous anticyclone favors the tropospheric cooling over southern Siberia, and the meridional (northward) displacement of the Asian jet (JMD) due to the change in the meridional temperature gradient. The combination of the SRP and the JMD facilitates less water vapor transport from the tropical oceans and anomalous descending motion over SCC, and thus suppresses the precipitation. These findings indicate that May Siberian SWE can be exploited for seasonal predictability of SCC precipitation.