A 1300‐year multi‐proxy,high‐resolution record from a rich fen in northern Poland: reconstructing hydrology,land use and climate change     

M. LAMENTOWICZ  M. GAŁKA  K. MILECKA  K. TOBOLSKI  Ł. LAMENTOWICZ  B. FIAŁKIEWICZ‐KOZIEŁ  M. BLAAUW 《第四纪科学杂志》2013,28(6):582-594

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Big Bend Megafold or Broken River Triple Junction?     

H. J. Harrington 《Australian Journal of Earth Sciences》2013,60(3-4):501-502

The Broken River Embayment is a major transverse structure in the Tasman Orogen in northern Queensland. Bell (1980) suggested that it is a hinge zone of an orocline, which he named the Big Bend Megafold. An alternative explanation, presented in this paper, involves a Silurian‐Devonian triple plate junction.  相似文献   

Comparing health status and access to health care in Canada’s largest metropolitan areas     

Daniel W. Harrington  Mark W. Rosenberg  Kathi Wilson 《Urban geography》2013,34(8):1156-1170

Research has shown persistent inequalities in access to health care between and within sociodemographic groups and geographic areas. Yet much of what we know about geographical disparities in access comes from studies of regional and urban/rural contrasts, or from studies of intra-urban, neighborhood-level variations. We know relatively little about variations in access to primary health care across different urban areas, and whether such variations translate into differences among residents’ health. This study examines how health status and access to primary care vary across five of Canada’s largest cities, paying particular attention to populations that may be particularly vulnerable based on age and income. Across all outcomes, there was a consistently strong relationship with individual socioeconomic status. We show that city of residence is important for access to health care but not for health status. Results are discussed in terms of their relevance for urban health-care policy and delivery, and impacts on health and access to care.  相似文献   

Temperature variations from Hubble Space Telescope imagery and spectroscopy of NGC 7009     

R. H. Rubin  N. J. Bhatt  R. J. Dufour  B. A. Buckalew  M. J. Barlow  X.-W. Liu  P. J. Storey  B. Balick  G. J. Ferland  J. P. Harrington  P. G. Martin 《Monthly notices of the Royal Astronomical Society》2002,334(4):777-786

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Spectropolarimetry of the Deep Impact target Comet 9P/Tempel 1 with HiVIS     

D.M. Harrington  K. Meech  J.R. Kuhn 《Icarus》2007,187(1):177-184

High resolution spectropolarimetry of the Deep Impact target, Comet 9P/Tempel 1, was performed during the impact event on July 4th, 2005 with the HiVIS spectropolarimeter and the AEOS 3.67-m telescope on Haleakala, Maui. We observed atypical polarization spectra that changed significantly in the few hours after the impact. The polarization of scattered light as a function of wavelength is very sensitive to the size and composition (complex refractive index) of the scattering particles as well as the scattering geometry. As opposed to most observations of cometary dust, which show an increase in the linear polarization with the wavelength (at least in the visible domain and for phase angles greater than about 30, a red polarization spectrum) observations of 9P/Tempel 1 at a phase angle of 41° beginning 8 min after impact and centered at 6:30 UT showed a polarization of 4% at 650 nm falling to 3% at 950 nm. The next observation, centered an hour later showed a polarization of 7% at 650 nm falling to 2% at 950 nm. This corresponds to a spectropolarimetric gradient, or slope, of −0.9% per 1000 Å 40 min after impact, decreasing to a slope of −2.3% per 1000 Å an hour and a half after impact. This is an atypical blue polarization slope, which became more blue 1 h after impact. The polarization values of 4 and 7% at 650 nm are typical for comets at this scattering angle, whereas the low polarization of 2 and 3% at 950 nm is not. We compare observations of Comet 9P/Tempel 1 to that of a typical comet, C/2004 Machholz, at a phase angle of 30° which showed a typical red slope, rising from 2% at 650 nm to 3% at 950 nm in two different observations (+1.0 and +0.9% per 1000 Å).  相似文献   

西天山伊犁地区石炭纪火山岩地球化学特征及构造环境   总被引：27，自引：13，他引：14  

龙灵利  高俊  钱青  熊贤明  王京彬  王玉往  高立明 《岩石学报》2008,24(4)

伊犁板块南北缘广泛发育石炭纪火山岩。其中阿希、巩乃斯和恰西石炭纪火山岩主要由玄武岩、安山玄武岩、玄武粗安岩、粗安岩和粗面岩组成,为基性冲性-酸性连续岩系,以中基性岩为主;它们多为钙碱性岩;轻稀土较重稀土元素富集,富集大离子亲石元素Rb,Ba,Th,U,K,相对亏损高场强元素Nb,Ta,Ti,具有大陆边缘火山岛弧火山岩亲缘性。其可能形成于准噶尔洋向南俯冲于伊犁板块之下的大陆边缘岛弧环境,伊犁板块南缘火山岩也有可能产出于南天山洋向伊犁-中天山板块之下俯冲的岛弧环境。  相似文献   

Extreme heat in New Zealand: a synthesis     

Harrington  Luke J.  Frame  Dave 《Climatic change》2022,170(1):1-31

Climatic Change - The usefulness of global integrated assessment model (IAM) results for policy recommendation in specific regions has not been fully assessed to date. This study presents the...  相似文献   

Impacts of a raw sewage spill on water and sediment quality in an urbanized estuary     

Mallin MA  Cahoon LB  Toothman BR  Parsons DC  McIver MR  Ortwine ML  Harrington RN 《Marine pollution bulletin》2007,54(1):81-88

A sewer main serving a large municipal wastewater system ruptured, discharging approximately 3,000,000 gallons (11,355,000 L) of raw human sewage into a multi-branched tidal creek estuary along the US East Coast. The biochemical oxygen demand caused severe hypoxia in the system, causing a large fish kill. The sewage load led to high fecal coliform bacteria concentrations in the creek (maximum of 270,000 CFU 100ml(-1)), which declined in an approximate logarithmic manner over the first few days. The spill caused elevated sediment fecal coliform bacteria and enterococcus counts that declined much more gradually than water column counts. Persistence of relatively high concentrations of fecal indicator bacteria in sediments for several weeks after the spill suggests that sediment sampling should be included in response to major sewage spills. The high concentration of nutrients in the spilled sewage led to several algal blooms. However, nutrient concentrations in the water column declined rapidly, demonstrating the value of conserving marshes because of their pollutant filtration function.  相似文献   

A review of astrometric observing     

R. S. Harrington 《Celestial Mechanics and Dynamical Astronomy》1985,37(3):325-328

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Solar Wind Control of Jupiter's H₃Auroras     

R.L. Baron  T. Owen  J.E.P. Connerney  T. Satoh  J. Harrington 《Icarus》1996,120(2):437-442

A program of observations of Jupiter's H⁺₃auroras was conducted during the first 4 months of 1992, a period that spanned the Ulysses encounter. Daily variations of auroral intensity are small in magnitude (∼20%) and well correlated with variations in the solar wind ram pressure arriving at Jupiter. A much larger (factor of 3) time variation is observed to occur on a time scale of approximately 2 months. During the first 2 months of observation, the inferred total intrinsic intensity of the northern aurora exceeded that of the southern aurora by a factor of 2. Throughout the latter 2 months, characterized by less intense auroral activity, the intensity of the northern aurora was comparable to that of the southern aurora.  相似文献