Meteorological Observations in 1995 at the Arctic Station,Qeqertarsuaq (Godhavn), Central West Greenland/Concentrational Agriculture: Types,Functions, and Derivation/Den Danske Nationalkomité for Geografi     

Ole Humlum  Niels Nielsen  Morten Rasch  Birger Ulf Hansen  Sofus Christiansen 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2013,113(1):119-129

In October 1990 an automatic meteorological station was established at the Arctic Station (69°15'N, 53°31'W), Qeqertarsuaq (Godhavn), Central West Greenland, The station register parameters each 20 min, and the parameters have been described in an earlier paper in this journal by Nielsen et al. (1995). The present paper summarises main points of the climate during 1995.

Concentrational agriculture, defined as types of agriculture based on local concentration of plant nutrients, encompasses two main types: shifting cultivation and infield-outfield systems. They may ecologically be characterised by their mode of concentration: either by a vertical or a horisontal transfer (‘pumping’) of nutrients, respectively. The use of the general term ‘concentrational agriculture’ for the two forms is advocated by demonstrating that functional substitution of one by the other is possible, and by showing that the one type theoretically can be derived from the other. Historically, infield-outfield systems are supposed to be developed from some form of shifting cultivation.

Kort beretning om virksomheden i 1995

Justering af medlemskredsen. I forbindelse med valg af repræsentanter fandt en justering af repræsentationsområder sled (Århus Universilet har ikke længere fagområdet ‘kulturgeografi’). Videnskabernes Selskab har i samme forbindelse bifaldet, at fire observatører, repræsenterende undervisningstrinene i geografi deltager i møderne.  相似文献   

Editorial     

Ole Mertz PhD 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2013,113(2)

  相似文献   

Small island sustainability in the Pacific: Introduction to the special issue     

Katherine V. Gough  Tim Bayliss-Smith  John Connell  Ole Mertz 《Singapore journal of tropical geography》2010,31(1):1-9

  相似文献   

Holocene palaeoecology of southwest Greenland inferred from macrofossils in sediments of an oligosaline lake     

Ole Bennike  N. John Anderson  Suzanne McGowan 《Journal of Paleolimnology》2010,43(4):787-798

We retrieved a lake sediment record from an oligosaline, meromictic lake in southwest Greenland. The record spans the last 8,200 cal. years and was radiocarbon dated and analysed for macroscopic remains of plants and animals. The record extends the known history of several invertebrate species back in time, and provides minimum ages for their immigration to Greenland after the last deglaciation. Shells of the ostracod Ilyocypris bradyi were found in sediments dated to the time interval c. 7,000–6,500 cal. years BP. Shells of this species were found previously in a nearby oligosaline lake, where its occurrence was dated to about the same short time interval. The species is a thermophilous, non-arctic taxon that is absent from the present day Greenland fauna, and we suggest that its former occurrence in west Greenland marks the peak of the Holocene thermal maximum. This is in agreement with other records from Greenland.  相似文献   

Towards spatially distributed quantitative assessment of tsunami inundation models     

John Davis Jakeman  Ole M. Nielsen  Kristy Van Putten  Richard Mleczko  David Burbidge  Nick Horspool 《Ocean Dynamics》2010,60(5):1115-1138

This paper presents a framework and data for spatially distributed assessment of tsunami inundation models. Our associated validation test is based upon the 2004 Indian Ocean tsunami, which affords a uniquely large amount of observational data for events of this kind. Specifically, we use eyewitness accounts to assess onshore flow depths and speeds as well as a detailed inundation survey of Patong City, Thailand to compare modelled and observed inundation. Model predictions matched well the detailed inundation survey as well as altimetry data from the JASON satellite, eyewitness accounts of wave front arrival times and onshore flow speeds. Important buildings and other structures were incorporated into the underlying elevation model and are shown to have a large influence on inundation extent.  相似文献   

Non-equilibrium effects in steady relativistic e⁺e^−γ winds     

Ole M. Grimsrud  & Ira Wasserman 《Monthly notices of the Royal Astronomical Society》1998,300(4):1158-1180

  相似文献   

Inverse eigenvalue problems for the mantle     

Ole H. Hald 《Geophysical Journal International》1980,62(1):41-48

Summary. It is shown that if Adams—Williamson's equation is used in the lower mantle and if the mass of the core and the density at the core—mantle boundary are given then the density, the rigidity and the incompressibility are uniquely determined throughout the mantle and in the crust by the velocities of the P - and S -waves and by one torsional spectrum. The velocity of the S -waves in the upper mantle and in the crust can be replaced by an additional torsional spectrum.  相似文献   

How whales influence herring school dynamics in a cold-front area of the Norwegian Sea   总被引：1，自引：2，他引：1  

Nottestad  Leif; Ferno  Anders; Mackinson  Steve; Pitcher  Tony; Misund  Ole Arve 《ICES Journal of Marine Science》2002,59(2):393-400

  相似文献   

Target-strength estimates of schooling herring and mackerel using the comparison method   总被引：1，自引：0，他引：1  

Misund  Ole Arve; Beltestad  Arvid K. 《ICES Journal of Marine Science》1996,53(2):281-284

  相似文献   

The use of a LISST-100 laser particle sizer for in-situ estimates of floc size, density and settling velocity   总被引：12，自引：0，他引：12  

Ole Mikkelsen  Morten Pejrup 《Geo-Marine Letters》2001,20(4):187-195

  相似文献