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Articles 31 - 38 of 38
Full-Text Articles in Physical and Environmental Geography
Unlocking Pre-1850 Instrumental Meteorological Records: A Global Inventory, Stefan Bronnimann, Rob Allan, Linden Ashcroft, Saba Baer, Mariano Barriendos, Fiona Williamson, Et Al
Unlocking Pre-1850 Instrumental Meteorological Records: A Global Inventory, Stefan Bronnimann, Rob Allan, Linden Ashcroft, Saba Baer, Mariano Barriendos, Fiona Williamson, Et Al
Research Collection School of Social Sciences
A global inventory of early instrumental meteorological measurements is compiled. It comprises thousands of series, many of which have not been digitized, pointing to the potential of weather data rescue.Instrumental meteorological measurements from periods prior to the start of national weather services are designated “early instrumental data”. They have played an important role in climate research as they allow daily-to-decadal variability and changes of temperature, pressure, and precipitation, including extremes, to be addressed. Early instrumental data can also help place 21st century climatic changes into a historical context such as to define pre-industrial climate and its variability. Until recently, the …
Malaya's Greatest Menace? Slow-Onset Disaster And The Muddy Politics Of British Malaya, C. 1900–50, Fiona Williamson
Malaya's Greatest Menace? Slow-Onset Disaster And The Muddy Politics Of British Malaya, C. 1900–50, Fiona Williamson
Research Collection School of Social Sciences
In 1948, a chilling statement from British Malaya’s Director of Agriculture, F. Burnett, made headline news. According to Burnett, unchecked soil erosion across hillside Malaya would soon render the country’s precious agricultural land infertile. Erosion had worsened considerably after the 1880s due to widespread, indiscriminate agricultural and industrial clearing. By the 1920s, it had become a sizeable socioeconomic and environmental issue, thought also to contribute to the scale and intensity of flooding and the likelihood of dangerous landslips. The British Government raised a series of empire-wide inquiries across the first half of the twentieth century, tied to an emerging global …
Disasters Fast And Slow: The Temporality Of Hazards In Environmental History, Fiona Williamson, Chris Courtney
Disasters Fast And Slow: The Temporality Of Hazards In Environmental History, Fiona Williamson, Chris Courtney
Research Collection School of Social Sciences
Popular representations of disasters tend to focus upon dramatic moments of chaos. They envision panicked communities desperately scrambling for safety as earthquakes reduce cities to rubble or lava turns villages to ashes. Yet disasters actually unfold on numerous temporal scales. Media reports tend to reduce disasters to discrete events, initiated on the shallow causal timescale of a meteorological fluctuation or seismic disruption. Social scientists, by contrast, have often sought to emphasise the processual nature of disasters—embedding causality in the deeper timescale of a community, in which risk and vulnerability build over months or years.2 Environmental historians elongate causality even further, …
Climate Change And Technology: Examining Opinion Formation Of Geoengineering, Christopher L. Cummings, Sonny Rosenthal
Climate Change And Technology: Examining Opinion Formation Of Geoengineering, Christopher L. Cummings, Sonny Rosenthal
Research Collection College of Integrative Studies
The term “climate change” has evolved from what was originally a technical term employed by scientists into a symbolic referent involving complex social, political, and moral considerations that have spurred worldwide debate. As evidence of the anthropogenic influence on the Earth’s climate has grown over the past few decades, climate change has come to be viewed as a primary challenge to be confronted in the twenty-first century. Geoengineering, or climate engineering, is a set of large-scale technological interventions proposed to offset climatic changes. This study seeks to understand which factors contribute to, or alternatively, detract from public acceptance of geoengineering …
Landscape Configuration And Urban Heat Island Effects: Assessing The Relationship Between Landscape Characteristics And Land Surface Temperature In Phoenix, Arizona, John Patrick Connors, Christopher S. Galletti, Winston T. L. Chow
Landscape Configuration And Urban Heat Island Effects: Assessing The Relationship Between Landscape Characteristics And Land Surface Temperature In Phoenix, Arizona, John Patrick Connors, Christopher S. Galletti, Winston T. L. Chow
Research Collection School of Social Sciences
The structure of urban environments is known to alter local climate, in part due to changes in land cover. A growing subset of research focuses specifically on the UHI in terms of land surface temperature by using data from remote sensing platforms. Past research has established a clear relationship between land surface temperature and the proportional area of land covers, but less research has specifically examined the effects of the spatial patterns of these covers. This research considers the rapidly growing City of Phoenix, Arizona in the United States. To better understand how landscape structure affects local climate, we explored …
Vulnerability To Extreme Heat In Metropolitan Phoenix: Spatial, Temporal, And Demographic Dimensions, Winston T. L. Chow, Wen-Ching Chuang, Patricia Gober
Vulnerability To Extreme Heat In Metropolitan Phoenix: Spatial, Temporal, And Demographic Dimensions, Winston T. L. Chow, Wen-Ching Chuang, Patricia Gober
Research Collection School of Social Sciences
This study assessed the spatial distribution of vulnerability to extreme heat in 1990 and 2000 within metropolitan Phoenix based on an index of seven equally weighted measures of physical exposure and adaptive capacity. These measures were derived from spatially interpolated climate, normalized differential vegetation index, and U.S. Census data. From resulting vulnerability maps, we also analyzed population groups living in areas of high heat vulnerability. Results revealed that landscapes of heat vulnerability changed substantially in response to variations in physical and socioeconomic factors, with significant alterations to spatial distribution of vulnerability especially between eastern and western sectors of Phoenix. These …
Quasi‐Hidden Markov Model And Its Applications In Cluster Analysis Of Earthquake Catalogs, Zhengxiao Wu
Quasi‐Hidden Markov Model And Its Applications In Cluster Analysis Of Earthquake Catalogs, Zhengxiao Wu
Research Collection School of Economics
We identify a broad class of models, quasi-hidden Markov models (QHMMs), which include hidden Markov models (HMMs) as special cases. Applying the QHMM framework, this paper studies how an earthquake cluster propagates statistically. Two QHMMs are used to describe two different propagating patterns. The “mother-and-kids” model regards the first shock in an earthquake cluster as “mother” and the aftershocks as “kids,” which occur in a neighborhood centered by the mother. In the “domino” model, however, the next aftershock strikes in a neighborhood centered by the most recent previous earthquake in the cluster, and therefore aftershocks act like dominoes. As the …
A Cluster Identification Framework Illustrated By A Filtering Model For Earthquake Occurrences, Zhengxiao Wu
A Cluster Identification Framework Illustrated By A Filtering Model For Earthquake Occurrences, Zhengxiao Wu
Research Collection School of Economics
A general dynamical cluster identification framework including both modeling and computation is developed.The earthquake declustering problem is studied to demonstrate how this framework applies.A stochastic model is proposed for earthquake occurrences that considers the sequence of occurrencesas composed of two parts: earthquake clusters and single earthquakes. We suggest that earthquake clusterscontain a “mother quake” and her “offspring.” Applying the filtering techniques, we use the solution offiltering equations as criteria for declustering. A procedure for calculating maximum likelihood estimations(MLE’s) and the most likely cluster sequence is also presented.