Spatial patterns of crime among Indian cities

An analysis of inter-city patterns of crime in India was undertaken. Using data for fourteen different types of crime and for 99 cities, standard correlation techniques were used to analyze the inter-relationships between different types of crime and the spatial distribution of these types. Factor analysis was applied to regionalize crime groups. An attempt is made to explain the crime patterns which emerge from the analysis, and the concentration of crime in the north-central region of India.     

On the abnormally high natural remanent magnetization of certain lavas

Summary The rock specimens found to have natural remanent magnetization of abnormally high intensity, have been generally from hill sides or tops, or from ridges high up from the local surroundings. A field of several hundred oersteds has been found sufficient to produce in some of the artificially demagnetized specimens an isothermal magnetization of the same order as the abnormal natural ones, and this magnetization has shown a similar degree of stability as the natural one. Variations in the direction and magnitude of the natural magnetic vector have been found over a distance of a few centimetres. Laboratory tests indicate a normal chemical composition for the specimens. The lightning discharge seems to be the plausible cause of abnormally high magnetization of rocks, which is generally isothermal and might have originated in the recent past, but the magnetization is sometimes complicated probably by the thermal effect of the discharge.     

Novelist Sarat Chandra's perception of his Bengali home region: a literary geographic study

Sarat Chandra, a Bengali novelist of the first half of the 20th century, has described the landscape of his southern Bengal Region and has interacted through his characters a deep psychological response appropriate to the region and time. His work forms an excellent resource base to reconstruct the region of his time and establish phenomenological relationship through the feelings expressed by the characters of his novels. Sarat Chandra's Home Region is a stream-filled area with people's activity directed to agriculture, though Calcutta was already established as a center of westernization and modernization. Feudal exploitation, Zamindars' tyrrany, degenerative caste-division, child marriage, prohibition of widow's right to remarry, decaying extended family and losing person-to-person relationship of the traditional Bengal were some of the characteristics of the regional cultural geography. The cities, particularly Calcutta, had started to show signs of modernization: industries, equal rights to women, widow re-marriage and elitist ideas. Bramho Samaj was pioneering the social modernization. In summation, the Home Region, being a transitional stage of decaying feudalism and incipient industrialization, was engaged in a struggle between the old and the new, decadent traditional and modern, rural and urban, caste rigidity and liberal social customs, religious fanaticism and rationalism. Sarat Chandra's work, particularly, provides an inroad to understand the cultural aspects of his Home Region.     

Climate simulation over CORDEX Africa domain using the fifth-generation Canadian Regional Climate Model (CRCM5)

The new fifth-generation Regional Climate Model (CRCM5) was driven by ERA reanalyses for the period 1984–2008 over the African continent following the CORDEX experimental protocol. Overall the model succeeds in reproducing the main features of the geographical distribution and seasonal cycle of temperature and precipitation, the diurnal cycle of precipitation, and the West African Monsoon (WAM). Biases in surface temperature and precipitation are discussed in relation with some circulation defects noted in the simulation. In the African regions near the equator, the model successfully reproduces the double peak of rainfall due to the double passage of the tropical rainbelt, although it better simulates the magnitude and timing of the second peak of precipitation. CRCM5 captures the timing of the monsoon onset for the Sahel region but underestimates the magnitude of precipitation. The simulated diurnal cycle is quite well simulated for all of the regions, but is always somewhat in advance for the timing of rainfall peak. In boreal summer the CRCM5 simulation exhibits a weak cold bias over the Sahara and the maximum temperature is located too far south, resulting in a southward bias in the position of the Saharan Heat Low. The region of maximum ascent in the deep meridional circulation of the Hadley cell is well located in the CRCM5 simulation, but it is somewhat too narrow. The core of the African Easterly Jet is of the right strength and almost at the right height, but it is displayed slightly southward, as a consequence of the southward bias in the position of the Saharan Heat Low and the thermal wind relationship. These biases appear to be germane to the WAM rainfall band being narrower and not moving far enough northward, resulting in a dry bias in the Sahel.     

The role of temperature in drought projections over North America

The effects of future temperature and hence evapotranspiration increases on drought risk over North America, based on ten current (1970–1999) and ten corresponding future (2040–2069) Regional Climate Model (RCM) simulations from the North American Regional Climate Change Assessment Program, are presented in this study. The ten pairs of simulations considered in this study are based on six RCMs and four driving Atmosphere Ocean Coupled Global Climate Models. The effects of temperature and evapotranspiration on drought risks are assessed by comparing characteristics of drought events identified on the basis of Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspration Index (SPEI). The former index uses only precipitation, while the latter uses the difference (DIF) between precipitation and potential evapotranspiration (PET) as input variables. As short- and long-term droughts impact various sectors differently, multi-scale (ranging from 1- to 12-month) drought events are considered. The projected increase in mean temperature by more than 2 °C in the future period compared to the current period for most parts of North America results in large increases in PET and decreases in DIF for the future period, especially for low latitude regions of North America. These changes result in large increases in future drought risks for most parts of the USA and southern Canada. Though similar results are obtained with SPI, the projected increases in the drought characteristics such as severity and duration and the spatial extent of regions susceptible to drought risks in the future are considerably larger in the case of SPEI-based analysis. Both approaches suggest that long-term and extreme drought events are affected more by the future increases in temperature and PET than short-term and moderate drought events, particularly over the high drought risk regions of North America.