Comments on “The search for standardized methods in analysis of environmental samples for hydrocarbons”     

K.A. Burns 《Marine Chemistry》1983,13(1):75-76

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The Alaskan shelf: Hydrographic,sedimentary and geochemical environment | G.D. Sharma, 1979. Springer-Verlag,Berlin, 498 pp., DM 59.00     

Robert E. Burns 《Earth》1982,18(1):80-81

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“An oasis for us”: ‘in-between’ spaces of training for people with mental health problems in the Scottish Highlands     

Chris Philo  Hester Parr  Nicola Burns 《Geoforum》2005,36(6):778-791

Training and Guidance (TAG) units in the Scottish Highlands are sites that people with mental health problems can access for training and learning activities designed to prepare them for (re-)entry into the labour market. These units also perform other, perhaps more intangible, roles in assisting trainees to cope with their mental health problems, thereby offering a supportive setting with therapeutic dimensions (albeit one not explicitly configured as delivering therapy). In this paper we explore the ‘in-between’ quality of the TAG units as spaces that might be said to possess dual economic and social roles. Using primarily qualitative evidence, we investigate both sets of roles, debating the extent to which the economic and social imperatives complement or contradict one another. The paper contributes to critical commentary on how ‘workfare’ initiatives articulate with the experiences and concerns of disabled trainees, the novelty arising in part from centralising the material spaces at the heart of such initiatives.  相似文献   

Stable isotope study of cave percolation waters in subtropical Brazil: Implications for paleoclimate inferences from speleothems     

Francisco W. Cruz  Jr.  Ivo Karmann  Oduvaldo Viana  Jr.  Stephen J. Burns  Jos A. Ferrari  Mathias Vuille  Alcides N. Sial  Marcelo Z. Moreira 《Chemical Geology》2005,220(3-4):245-262

We analyze the interannual monthly variability of oxygen isotope ratios in data from IAEA stations along the Atlantic coast of South America between 23° and 34° S to evaluate the influence of parameters such as temperature, rainfall amount and moisture source contribution on meteoric water recharging two karst systems in subtropical Brazil. In addition, a 2 year monitoring program performed on soil and cave drip and rimstone pool waters from sampling sites with contrasting discharge values and located at 100 and 300 m below the surface in the Santana Cave System (24°31′ S; 48°43′ W), is used to test the influence of hydrologic and geologic features on the temporal variations of seepage water δ¹⁸O.

Interannual monthly variations in δ¹⁸O of rainfall reflect primarily regional changes in moisture source contribution related to seasonal shifts in atmospheric circulation from a more monsoonal regime in summer (negative values of δ¹⁸O) to a more extratropical regime in winter (positive values of δ¹⁸O). Variations in groundwater δ¹⁸O indicate that the climatic signal of recent rainfall events is rapidly transmitted through the relatively deep karst aquifer to the cave drip waters, regardless of location of collection in the cave. In addition, the data also suggest that water replenishment in the system is triggered by the increase in hydraulic head during periods when recharge exceeds the storage capacity of the soil and epikarst reservoirs. Significant perturbations in the groundwater composition, characterized by more positive values of δ¹⁸O, are probably connected to an increased Atlantic moisture contribution associated with extratropical precipitation. This implies that the δ¹⁸O of speleothems from caves in this region may be a suitable proxy for studying tropical–extratropical interactions over South America, a feature that is intrinsically related to the global atmospheric circulation.  相似文献   

Shallow Drainage Flows   总被引：1，自引：1，他引：0  

L. Mahrt  Dean Vickers  Reina Nakamura  M. R. Soler  Jielun Sun  Sean Burns  D.H. Lenschow 《Boundary-Layer Meteorology》2001,101(2):243-260

Two-dimensional sonic anemometers and slowresponse thermistors were deployedacross a shallow gully during CASES99. Weak gully flow of a few tenths of m s^-1 anda depth of a few metres develops in the earlyevening on most nights with clear skies.Flow down the gully developed sometimes evenwhen the opposing ambient wind exceeded10 m s^-1 at the top of the60–m tower. Cold air drainage fromlarger-scale slopes flows over the top ofthe colder gully flow. The gully flowand other drainage flows are generally eliminated in the middle of the night in conjunctionwith flow acceleration abovethe surface inversion layer and downwardmixing of warmer air and highermomentum. As the flow decelerates later inthe night, the gully flow may re-form.The thin drainage flows decouple standard observational levels of3–10 m from the surface.Under such common conditions, eddy correlationflux measurements cannot be used toestimate surface fluxes nor even detect thethin gully and drainage flows. The gentlegully system in this field program is typical ofmuch of the Earths land surface.  相似文献   

Survey of tar,hydrocarbon and metal pollution in the coastal waters of Oman     

K.A. Burns  J.P. Villeneuve  V.C. Anderlin  S.W. Fowler 《Marine pollution bulletin》1982,13(7):240-247

Quantitative beach sampling conducted after the S. W. monsoon season yielded average standing stocks of tar ranging from 5 to 2325 g m^?1 of shoreline with overall average of 224 g m^?1. Values are among the highest reported for any world area and show a trend of increasing levels of oil residues close to the Strait of Hormuz. Data support the premise that tanker deballasting is a major source of oil pollution on the Omani coast. Locally high levels were seen near offshore tanker loading facilities. Petroleum hydrocarbons in rock oysters increased in a south to north gradient consistent with beach tar observations. But relatively low hydrocarbon levels in biota coupled with observations of very little floating tar suggests that oil released in Omani coastal waters aggregates, sinks, and reaches the coast as heavy tar lumps. Except for elevated levels of Cd at two stations, heavy metal and chlorinated hydrocarbon concentrations were low compared to more industrialized world areas. Suggestions are made to improve the effectiveness of future pollution studies in the Gulf Region.  相似文献   

Critical Data,Critical Technology in Theory and Practice     

Ryan Burns  Craig M. Dalton  Jim E. Thatcher 《The Professional geographer》2018,70(1):126-128

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An example of a highly bioturbated,storm‐influenced shoreface deposit: Upper Jurassic Ula Formation,Norwegian North Sea     

Greg M. Baniak  Murray K. Gingras  Beverly A. Burns  S. George Pemberton 《Sedimentology》2014,61(5):1261-1285

Integrated ichnological and sedimentological analyses of core samples from the Upper Jurassic Ula Formation in the Norwegian Central Graben were undertaken to quantify the influence of storm waves on sedimentation. Two main facies associations (offshore and shoreface) that form a progradational coarsening upward succession are recognizable within the cores. The offshore deposits are characterized by massive to finely laminated mudstones and fine‐grained sandstones, within a moderately to highly bioturbated complex. The trace fossil assemblage is dominated by deposit‐feeding structures (for example, Planolites, Phycosiphon and Rosselia) and constitutes an expression of the proximal Zoophycos to distal Cruziana ichnofacies. The absence of grazing behaviours and dominance of deposit‐feeding ichnofossils is a reflection of the increased wave energies present (i.e. storm‐generated currents) within an offshore setting. The shoreface succession is represented by highly bioturbated fine‐grained to medium‐grained sandstones, with intervals of planar and trough cross‐bedding, thin pebble lags and bivalve‐rich shell layers. The ichnofossil assemblage, forming part of the Skolithos ichnofacies, is dominated by higher energy Ophiomorpha nodosa ichnofossils and lower energy Ophiomorpha irregulaire and Siphonichnus ichnofossils. The presence of sporadic wave‐generated sedimentary structures and variability in ichnofossil diversity and abundance attests to the influence of storm‐generated currents during deposition. As a whole, the Ula Formation strongly reflects the influence of storm deposits on sediment deposition; consequently, storm‐influenced shoreface most accurately describes these depositional environments.  相似文献