Characterising runoff generation processes in a lake-rich thermokarst landscape (Old Crow Flats, Yukon, Canada) using δ18 O, δ2 H and d-excess measurements
Canada ; Deuterium ; Geochemistry ; Isotope analysis ; Lake ; Oxygen 18 ; Runoff ; Space time ; Thermokarst ; Tracer ; Yukon Territory
In Old Crow Flats, a lake-rich thermokarst landscape in northern Yukon Territory (Canada), local land users have concerns over the effects of recent lake drainage and fluctuating river discharge on their traditional way of life. In the absence
of hydrometric stations, the AA. evaluate the utility of isotopic monitoring of the lower Old Crow River, which is fed by several tributaries and drains the flats, for tracking runoff generation. Isotopic snapshots obtained from 2007, 2008 and 2009 during
processes in the Old Crow Flats and other northern lake-rich landscapes drained by rivers.
The importance of natural variability in lake areas on the detection of permafrost degradation : A case study in the YukonFlats, Alaska
Alaska ; Années 1999-2002 ; Bilan hydrologique ; Dégradation de l'environnement ; LANDSAT ; Lac ; Pergélisol ; Périglaciaire ; Télédétection ; Variabilité climatique ; Variabilité interannuelle ; YukonFlats
the YukonFlats. Both intra- and interannual area variability in August and September were smaller than in June and July, suggesting that images from later in summer are more reliable for detecting long-term change in lake area. Variability of no-closure
Extending airborne electromagnetic surveys for regional active layer and permafrost mapping with remote sensing and ancillary data, YukonFlats Ecoregion, Central Alaska
The goal of this study was to map active-layer thickness (ALT) and the presence or absence of near-surface permafrost at 30-m resolution throughout the YukonFlats Ecoregion (YFE) of central Alaska. The AA. 1) compiled airborne electromagnetic (AEM
[b7] YukonFlats National Wildlife Refuge, Fairbanks, Etats-Unis
Vegetation-permafrost relations within the forest-tundra ecotone near Old Crow, Northern Yukon, Canada
Années 2008-2011 ; Canada ; Distribution spatiale ; Ecotone ; Forêt ; Neige ; Northwest Territories ; Old Crow ; Pergélisol ; Température du sol ; Toundra ; Végétation ; Yukon ; Zone froide
Canada ; Cold area ; Ecotone ; Forest ; Northwest Territories ; Permafrost ; Snow ; Soil temperature ; Spatial distribution ; Tundra ; Vegetation ; Yukon
Old Crow Flats is a glaciolacustrine plain that straddles the forest-tundra ecotone in northern Yukon. Annual mean near-surface permafrost temperatures (Tps) measured on the Flats between 2008 and 2011 in patches of taiga, tall shrubs and low shrubs
Crafting a sense of place : media's use of the Bonneville Salt Flats
Esthétique du paysage ; Etats-Unis ; Lieu ; Montagne ; Paysage ; Paysage culturel ; Slat Flats ; Utah
The Salt Flats, near the Utah-Nevada state line, are a scenic but chameleon-like landscape. Study identifies the factors that make the Salt Flats so appealing to filmmakers and to classify the types of places they create with it. The Salt Flats
Behaviour of heavy metals in a mud flat of the Scheldt Estuary, Belgium
On the Ballasplaat intertidal mud flat pollution is not uniform, due to varying physico-chemical conditions (essentially variable redox profiles). The transportation of heavy metals across the sediment water interface is very much depending upon
Properties of talus slopes composed of flat blocks
In this paper the AA. draw attention to a rarer kind of talus slopes, the ones mostly formed by flat stones as building blocks. One case study in Norway is examined as an example typifying the properties of flat-blocks taluses. From comparisons
the headwall. To understand the formation dynamics of flat-block taluses, the AA. also carried out some simple experiments with flat blocks falling onto an experimental board.
Possible effects of recent changes in sea level on the biota of a Caribbean reef flat and predicted effects of rising sea levels in Proceedings. Volume 3. Symposia and seminars.
Prediction of the changes in biota that would result on a semi-intertidal reef flat of Panama from a slight rise in sea level.
All landscapes (in humid climates) can be considered as a superposition and juxtaposition of catenas , each catena consisting on top of a flat eluvial, in the middle of a steep colluvial and at the bottom of a flat alluvial zone. Catenas had
Evidence for loess in northwest Lower Michigan : characterizing the silty mantle on the Buckley Flats outwash plain
The AA. report on a silt-rich mantle on a section of the Outer Port Huron outwash plain in northwest Lower Michigan, known locally as the Buckley Flats. They examine various hypotheses on the origin of the silt-rich sediment. Data derived from 67
sites were kriged to create smoothed surfaces of cap thickness and various textural attributes. The AA. suggest that, during the latter phases of the Port Huron advance, while the Manistee River was still carrying glacial meltwater, the Buckley Flats
would have been a dry, stable, upland landscape, relatively near to the river. They conclude that the silty mantle on the Buckley Flats is loess.
Characteristics and tidal flat trends of soil organic matter (SOM) turnover were studied for the Chrongmingdongtan Salt Marsh in the Yangtze River estuary, based on analyses C 13, grain sizes and contents of particulate organic carbon, total
nitrogen and inorganic carbon for 3 cores excavated from high tidal flat, middle tidal flat and bare flat. The muddy tidal flat processes exerted direct influences on sequestration and turnover of SOM in the salt marsh, and had great constraints
The variation of sediments organic carbon content in Chongming east tidal flat during Scirpus mariqueter growing stage
The AA. selected Chongming east tidal flat as the typical Yangtze estuary intertidal flat research site, focused on investigating the relationship between sediments organic content variation and S. mariqueter growing stage, and tried to expand
the study of carbon cycle in the Yangtze estuary and other estuarine and coastal tidal flats.
Productivity of eroded rangelands on the Njemps Flats
Factors limiting productivity of overgrazed, semi-arid rangelands on the Njemps Flats, Kenya were investigated, conducting fertilization and irrigation experiments. Productivity was evaluated in terms of yield, vegetation quality and soil chemical
Two time scales of micro-tidal flat erosion and accumulation, I : sediment changes
The paper describes a study of the changes in grain-size parameters associated with erosion and deposition on a microtidal flat. Seasonal variations were found to be greater than the long-term changes. Hyperbolic grain-size parameters were found