Stephen C Porter
Biographic Data
| ID | 3608508 |
|---|---|
| NAME | Stephen C Porter |
| GIVEN NAMES | Stephen C |
| FAMILY NAME | Porter |
| SIGNATURE | PORTER S C |
| AFFILIATIONS | University of Washington |
| ORCID | 0000-0003-4416-5387 |
| VERIFIED | Yes |
| TOTAL WORKS | 46 |
| TOTAL CITATIONS | 29 |
| AUTHOR COUNT | 46 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1964 |
| LATEST PUBLICATION YEAR | 2017 |
| H-INDEX | 4 |
Development and feasibility testing of the Pediatric Emergency Discharge Interaction Coding Scheme
BACKGROUND: Discharge communication is an important aspect of high-quality emergency care. This study addresses the gap in knowledge on how to describe discharge communication in a paediatric emergency department (ED). OBJECTIVE: The objective of this feasibility study was to develop and test a coding scheme to characterize discharge communication between health-care providers (HCPs) and caregivers who visit the ED with their children. DESIGN: Th…
A framework for improving the responsiveness of policy through development evaluation
Development evaluation, which prioritizes poverty reduction, potentially can increase the responsiveness of policy to poor people. Power imbalances, however, mean that although development evaluation has the possibility to be an important contributor to poverty reduction efforts, the interests of the poor are often excluded from the process of evaluation. In this article a framework that utilizes principal–agent concepts is detailed and applied, …
Detection and characterisation of Black Death burials by multi-proxy geophysical methods
A Comparison of Domestic and Non-Domestic Homicides
What Can be Done About High-Risk Perpetrators of Domestic Violence
Holocene variability in hydrology, vegetation, fire, and eolian activity in the Nebraska Sand Hills, USA
This study combined multiple aquatic and terrestrial proxies, including diatoms, pollen, grain size, and bulk-sediment chemistry to reconstruct the history of three lake sites located in the central Sand Hills of Nebraska, USA. Long-term changes in effective moisture are evident at all sites, with significant changes occurring at ~6000, ~4000, and ~ 2000 cal. yr BP. Both aquatic and terrestrial indicators suggest that effective moisture was low b…
Who will guard the guardians? Amartya Sen's contribution to development evaluation
An Action Learning process integrated with Sen's Capability Approach can support development agencies to formulate interventions that enhance freedom. The authors show that putting this approach into practice has important implications for the manner in which ‘development’ is undertaken as an ideological project. It may help to examine and challenge those who hold power in development: the guardians. This finding is the result of an emergent Acti…
A. Lincoln Washburn (1911–2007)
died in Seattle on
Synchronism of Holocene East Asian monsoon variations and North Atlantic drift-ice tracers
Eighteen radiocarbon-dated eolian and paleosol profiles within a 1500-km-long belt along the arid to semi-arid transition zone of north-central China record variations in the extent and strength of the East Asian summer monsoon during the Holocene. Dated paleosols and peat layers represent intervals when the zone was dominated by a mild, moist summer monsoon climate that favored pedogenesis and peat accumulation. Brief intervals of enhanced eolia…
Episodic gullying and paleomonsoon cycles on the Chinese Loess Plateau
Buried gullies exposed in road excavations along the margin of a loess tableland on the Loess Plateau of central China lie within a thick loess-paleosol succession that spans ≥780,000 years. Constraining ages for gully cutting and filling are provided by dates of loess and soil units cut by and capping the paleogullies. An episode of gully cutting begins at the onset of an interglaciation and ceases as the gullies begin to fill with colluvium and…
Reconstruction of equilibrium-line altitudes for tropical and sub-tropical glaciers
Pleistocene snowlines and glaciation of the Hawaiian Islands
Last Interglacial Climates
The last interglacial, commonly understood as an interval with climate as warm or warmer than today, is represented by marine isotope stage (MIS) 5e, which is a proxy record of low global ice volume and high sea level. It is arbitrarily dated to begin at approximately 130,000 yr B.P. and end at 116,000 yr B.P. with the onset of the early glacial unit MIS 5d. The age of the stage is determined by correlation to uranium–thorium dates of raised cora…
Dependence of Near-Surface Magnetic Susceptibility on Dust Accumulation Rate and Precipitation on the Chinese Loess Plateau
Magnetic susceptibility (MS) of surface sediment varies systematically across the Loess Plateau in central China, decreasing exponentially from >200×10 −8 m 3 /kg at the northern margin of the Qinling Shan to ≤30×10 −8 m 3 /kg near the southern margin of the Mu Us Desert. MS correlates highly with loess median grain size ( r 2 =0.79), which decreases south-southeastward across the plateau. It also correlates with mean annual temperature (MAT) and…
Evolution of Asian monsoons and phased uplift of the Himalaya–Tibetan plateau since Late Miocene times
High-Resolution Paleoclimatic Information from Chinese Eolian Sediments Based on Grayscale Intensity Profiles
Grayscale intensity profiles from photographic images offer a rapid means of obtaining paleoclimate proxy records from Chinese loess, dune sand, and paleosols. Although the data can be obtained using conventional 35-mm film images, a digital camera and laptop computer will produce a high-resolution grayscale profile at a field site within minutes. Comparison of grayscale profiles with profiles of magnetic susceptibility measured down loess and du…
Asynchronous Holocene optimum of the East Asian monsoon
Inqua and Quaternary science at the Millennium
Radiocarbon Age Constraints on Rates of Advance and Retreat of the Puget Lobe of the Cordilleran Ice Sheet during the Last Glaciation
Calibrated radiocarbon dates of organic matter below and above till of the last (Fraser) glaciation provide limiting ages that constrain the chronology and duration of the last advance–retreat cycle of the Puget Lobe in the central and southeastern Puget Lowland. Seven dates for wood near the top of a thick proglacial delta have a weighted mean age of 17,420 ± 90 cal yr B.P., which is the closest limiting age for arrival of the glacier near the l…
Henry Purcell and the Charterhouse. Composer in Residence
A Tribute to Minze Stuiver Upon his Retirement
The renowned lab, which Minze founded 29 years ago, will close when he leaves. Throughout his long and produc- tive career, Minze's integrity
Late Pleistocene Eolian Sediments Related to Pyroclastic Eruptions of Mauna Kea Volcano, Hawaii
Loess and dune sands that mantle volcanic rocks on the northwest flank of Mauna Kea volcano consist predominantly of fine-grained pyroclasts of the alkalic Laupahoehoe Volcanics produced by explosive eruptions. The loess is divided into lower and upper units, separated by a well-developed paleosol, while older and younger dune sands are separated by loess. Four interstratified tephra marker horizons aid in regional stratigraphic correlation. Radi…
Variability of Monsoon Climate in East Asia at the End of the Last Glaciation
High-resolution paleomonsoon proxy records from peat and eolian sand–paleosol sequences at the desert–loess transition zone in China denote a rapid oscillation from cold–dry conditions (11,200–10,600 14 C yr B.P.) to cool–humid conditions (10,600–10,200 14 C yr B.P.), followed by a return to cold–dry climate (10,200–10,000 14 C yr B.P.). Variations in precipitation proxies suggest that significant climatic variability occurred in monsoonal easter…
Grain Size of Quartz as an Indicator of Winter Monsoon Strength on the Loess Plateau of Central China during the Last 130,000 Yr
The Chinese loess-paleosol sequence constitutes an important record of variations in Asian monsoon climate over the past 2.4 myr. Magnetic susceptibility of loess and paleosols has been used as a proxy for summer monsoon intensity, while median grain size has been regarded as a measure of the strength of winter monsoon winds that were responsible for most of the dust transport. However, median grain size is only an approximate index of winter mon…
Correlation between climate events in the North Atlantic and China during the last glaciation
A Comparison of Domestic and Non-Domestic Homicides
Detection and characterisation of Black Death burials by multi-proxy geophysical methods
What Can be Done About High-Risk Perpetrators of Domestic Violence
Holocene variability in hydrology, vegetation, fire, and eolian activity in the Nebraska Sand Hills, USA
This study combined multiple aquatic and terrestrial proxies, including diatoms, pollen, grain size, and bulk-sediment chemistry to reconstruct the history of three lake sites located in the central Sand Hills of Nebraska, USA. Long-term changes in effective moisture are evident at all sites, with significant changes occurring at ~6000, ~4000, and ~ 2000 cal. yr BP. Both aquatic and terrestrial indicators suggest that effective moisture was low b…
Henry Purcell and the Charterhouse. Composer in Residence
A Tribute to Minze Stuiver Upon his Retirement
The renowned lab, which Minze founded 29 years ago, will close when he leaves. Throughout his long and produc- tive career, Minze's integrity
The Fire-raid in the English Civil War
Antiquity of Man at Anaktuvuk Pass, Alaska
Geologic evidence from Anaktuvuk Pass indicates that the latest ice advance during the Itkillik glaciation reached its maximum stand between 8000 and 9000 years ago. Archaeological sites at the pass lie behind a terminal moraine built during this advance and therefore must postdate it. In view of the probable time involved for deglaciation, habitable ice-free areas near the axis of the valley could not have been available for campsites until an a…
Antiquity of Man at Anaktuvuk Pass, Alaska
Geologic evidence from Anaktuvuk Pass indicates that the latest ice advance during the Itkillik glaciation reached its maximum stand between 8000 and 9000 years ago. Archaeological sites at the pass lie behind a terminal moraine built during this advance and therefore must postdate it. In view of the probable time involved for deglaciation, habitable ice-free areas near the axis of the valley could not have been available for campsites until an a…
Glaciation of Chagvan Bay Area, Southwestern Alaska
Morphologic and stratigraphic evidence in this area indicates that a four-fold succession of glaciers originating in the Ahklun Mountains, spread over the coastal lowlands as broad piedmont lobes. The Kemuk and Clara Creek glaciations are considered Pre-Wisconsin, the Chagvan and Unaluk glaciations Wisconsin in age. Radiocarbon dates for the Unavuk and Chagvan drifts are 8910 ± 110 yr and >45,000 yr respectively. A broad bedrock channel buried be…
Life, Land, and Water
Problems of Interpreting Radiocarbon Dates from Dead-Ice Terrain, with an Example from the Puget Lowland of Washington
Radiocarbon dates of organic matter collected from ablation till or from the base of peat bogs in dead-ice deposits may postdate retreat of an active glacier terminus by hundreds or even thousands of years, and therefore provide only minimum estimates for the time of glacial maximum and the beginning of ice recession. Logs incorporated in Vashon till close to the drift border postdate recession of the Puget Lobe of the Cordilleran Ice Sheet by so…
Itkillik Glaciation in the Brooks Range, Northern Alaska
During the Itkillik Glaciation the Brooks Range supported an extensive mountain-glacier complex that extended for 750 km between 141° and 158°W longitude. Individual ice streams and piedmont lobes flowed as much as 50 km beyond the north and south margins of the range. Glaciers in the southern Brooks Range were longer than those farther north because of a southerly precipitation source, whereas those in the central and eastern part of the range w…
Equilibrium-line Altitudes of Late Quaternary Glaciers in the Southern Alps, New Zealand
Equilibrium-line altitudes (ELA's) of former glaciers in the Tasman River-Lake Pukaki drainage basin of the Southern Alps were reconstructed from glacial-geologic data on former ice limits by using an assumed accumulation-area ratio of 0.6 ± 0.05. Late Holocene (Neoglacial) ELA's were depressed 140 m below present levels, whereas those of four late Pleistocene ice advances were depressed 500 m (Birch Hill), 750 m (Tekapo), 875 m (Mt. John), and 1…
Glacier Peak Tephra in the North Cascade Range, Washington
Pumiceous tephra, resulting from multiple eruptions of Glacier Peak volcano in late-glacial time, mantles much of the landscape in the eastern North Cascade Range and extends eastward beyond the Columbia River as a thinner discontinuous deposit. Within about 25 km of the source, the tephra is divisible into as many as nine layers, distinguishable in the field on the basis of color, grain size, thickness, and stratigraphic position. Three principa…
Hawaiian Glacial Ages
Four glacial drifts that are interstratified with lava flows and tephra layers on the upper slopes of Mauna Kea demonstrate that an ice cap formed repeatedly at the summit of the volcano during the middle and late Pleistocene. The oldest drift (Pohakuloa Formation) probably was deposited shortly after eruption of a lava flow having a K/Ar age of 278,500 ± 68,500 yr. Drift of the Waihu Formation, marked by a belt of subdued end moraines, is correl…
Klutlan Glacier Issue
The Social and Economic Structure of an Early Modern Suburb
IAN ROY, STEPHEN PORTER; The Social and Economic Structure of an Early Modern Suburb: the Tything at Worcester, Historical Research, Volume 53, Issue 128
Pleistocene Glaciation in the Southern Lake District of Chile
Relative-age criteria permit deposits of successive Andean glacier advances in the southern Lake District of Chile to be divided into four mappable drift sheets, the oldest two of which overlie Tertiary bedrock along the eastern flank of the Cordillera de la Costa. Only the youngest drift (Llanquihue) is datable by radiocarbon. During the most extensive ice advance of the last glaciation the Lago Llanquihue glacier was about 95 km long and reache…
Holocene Sea-Level Changes Along the Strait of Magellan and Beagle Channel, Southernmost South America
Radiocarbon-dated marine sediments from five coastal sites along the Strait of Magellan and Beagle Channel in southernmost Chile permit construction of a curve of relative sea-level fluctuations during the Holocene. Morphologic and stratigraphic data point to coastal submergence during the early Holocene as the sea rose to a maximum level at least 3.5 m higher than present about 5000 yr ago. Progressive emergence then followed during the late Hol…
The Fire-raid in the English Civil War
The Oxford Fire Regulations of 1671
Journal Article The Oxford Fire Regulations of 1671 Get access Stephen Porter Stephen Porter Search for other works by this author on: Oxford Academic Google Scholar Bulletin of the Institute of Historical Research, Volume 58, Issue 138, November 1985, Pages 251–255, https://doi.org/10.1111/j.1468-2281.1985.tb01174.x Published: 12 October 2007
Pattern and Forcing of Northern Hemisphere Glacier Variations During the Last Millennium
Time series depicting mountain glacier fluctuations in the Alps display generally similar patterns over the last two centuries, as do chronologies of glacier variations for the same interval from elsewhere in the Northern Hemisphere. Episodes of glacier advance consistently are associated with intervals of high average volcanic aerosol production, as inferred from acidity variations in a Greenland ice core. Advances occur whenever acidity levels …
A. Lincoln Washburn—An Appreciation
Some Geological Implications of Average Quaternary Glacial Conditions
Analyses of Quaternary landscape evolution tend to focus on events associated with culminations of glacial and interglacial ages, but for most of Quaternary time, environments were intermediate in character. Average Quaternary glacial conditions, based on assessment of the marine isotope record, approximated those near the stage 2/stage 1 transition and during substages 5b and 5d; isotope stages 3 and 4 and substages 5a-d lie within one standard …
Magnetic susceptibility evidence of monsoon variation on the Loess Plateau of central China during the last 130,000 years
The magnetic susceptibility of loess and paleosols in central China represents a proxy climate index closely related to past changes of precipitation and vegetation, and thus to summer monsoon intensity. Time series of magnetic susceptibility constructed for three loess-paleosol sequences in the southern part of the Chinese Loess Plateau document the history of summer monsoon variation during the last 130,000 yr. They correlate closely with the o…
Cyclic Quaternary alluviation and terracing in a nonglaciated drainage basin on the north flank of the Qinling Shan, central China
Pleistocene alluvial terraces of the nonglaciated Ba River drainage basin on the north flank of the Qinling Shan are capped by a succession of loess units and paleosols that correlate with the standard marine isotope chronology and are used to date the subjacent alluvial gravels. Alluvial fills were deposited during isotope stages 2, 6, 8, 12, and 16, whereas terracing occurred during interglacial stages 1, 5, 7, 11, and 15. The apparent absence …
A dictionary of English place-names
Episode of Strengthened Summer Monsoon Climate of Younger Dryas Age on the Loess Plateau of Central China
The Baxie loess section, just east of the Tibetan Plateau, contains evidence showing that the Asian monsoon climate experienced an abrupt reversal near the end of the last glacial age. Rapid deposition of dust under cool, dry full-glacial conditions gave way to an interval of soil development and reduced dust influx attributed to a strengthening of the warm, moist summer monsoon. A subsequent abrupt increase in dust deposition, a response to a we…
Grain Size of Quartz as an Indicator of Winter Monsoon Strength on the Loess Plateau of Central China during the Last 130,000 Yr
The Chinese loess-paleosol sequence constitutes an important record of variations in Asian monsoon climate over the past 2.4 myr. Magnetic susceptibility of loess and paleosols has been used as a proxy for summer monsoon intensity, while median grain size has been regarded as a measure of the strength of winter monsoon winds that were responsible for most of the dust transport. However, median grain size is only an approximate index of winter mon…
Correlation between climate events in the North Atlantic and China during the last glaciation
Variability of Monsoon Climate in East Asia at the End of the Last Glaciation
High-resolution paleomonsoon proxy records from peat and eolian sand–paleosol sequences at the desert–loess transition zone in China denote a rapid oscillation from cold–dry conditions (11,200–10,600 14 C yr B.P.) to cool–humid conditions (10,600–10,200 14 C yr B.P.), followed by a return to cold–dry climate (10,200–10,000 14 C yr B.P.). Variations in precipitation proxies suggest that significant climatic variability occurred in monsoonal easter…
Late Pleistocene Eolian Sediments Related to Pyroclastic Eruptions of Mauna Kea Volcano, Hawaii
Loess and dune sands that mantle volcanic rocks on the northwest flank of Mauna Kea volcano consist predominantly of fine-grained pyroclasts of the alkalic Laupahoehoe Volcanics produced by explosive eruptions. The loess is divided into lower and upper units, separated by a well-developed paleosol, while older and younger dune sands are separated by loess. Four interstratified tephra marker horizons aid in regional stratigraphic correlation. Radi…
Geology (30 works) · Geology and Paleoclimatology Research (29 works) · Physical geography (26 works) · Geography (24 works) · Paleontology (20 works) · Geomorphology (19 works) · Glacial period (18 works) · Oceanography (14 works) · Glacier (12 works) · Loess (12 works)