نتایج جستجو برای: arctic oscillationao
تعداد نتایج: 23724 فیلتر نتایج به سال:
The ability to make a living in the Arctic represents one of humanity’s truly exceptional achievements. The fact that it was accomplished by people who depended exclusively on wild (that is, uncultivated) resources attests to the levels of human imagination and ingenuity in creating cultural systems that effectively buffered against the physical elements of the Arctic. For these reasons, studie...
Though many global aerosols models prognose surface deposition, only a few models have been used to directly simulate the radiative effect from black carbon (BC) deposition to snow and sea ice. Here, we apply aerosol deposition fields from 25 models contributing to two phases of the Aerosol Comparisons between Observations and Models (AeroCom) project to simulate and evaluate within-snow BC con...
High-latitude rivers supply the Arctic Ocean with a disproportionately large share of global riverine discharge and terrigenous dissolved organic matter (DOM). We used the abundance of lignin, a macromolecule unique to vascular plants, and stable carbon isotope ratios (d13C) to trace the high molecular weight fraction of terrigenous DOM in major water masses of the Arctic Ocean. Lignin oxidatio...
The opportunity to comment on "Misalliances in the Barrow Alcohol Study" by Dr. Edward Foulks opens the door to the discussion of a wide range of issues in sociocultural research. These comments will focus on issues specific and relevant to the Barrow study. I will confine myself to discussion of the Arctic and the immediate relevance of Arctic Research to the larger scene. Arctic research has ...
Arctic Options: Holistic Integration for Arctic Coastal-Marine Sustainability is a new three-year research project to assess future infrastructure associated with the Arctic Ocean regarding: (1) natural and living environment; (2) built environment; (3) natural resource development; and (4) governance. For the assessments, Arctic Options will generate objective relational schema from numeric da...
Our goal is to greatly increase access to the Arctic Ocean by creating and demonstrating a safe and economical platform capable of basin-scale surveys. Specifically, we are developing a Autonomous Underwater Vehicle for Arctic research with unprecedented endurance, and the capability to relay data through the ice to satellites. We will provide a means of monitoring changes taking place in the A...
This study used several model-based tools to analyse the dynamics of the Arctic Basin between 1997 and 2006 as a linked system of land-ocean-atmosphere C exchange. The analysis estimates that terrestrial areas of the Arctic Basin lost 62.9 Tg C yr−1 and that the Arctic Ocean gained 94.1 Tg C yr−1. Arctic lands and oceans were a net CO2 sink of 108.9 Tg C yr−1, which is within the range of uncer...
We investigated the diet of arctic foxes (Alopex lagopus) in the Karupelv valley, East Greenland, during the summer of 1997. Despite a low density, lemmings were the most utilized prey, comprising 65.3% of dry fecal weight in fresh feces. This demonstrates the importance of lemming species as prey for arctic foxes all through a lemming cycle. Birds, arctic hare (Lepus arcticus), and insects als...
Arctic residents, whose diets comprise a large proportion of traditional terrestrial and freshwater foodstuffs, have received the highest radiation exposures to artificial radionuclides in the Arctic. Doses to members of both the average population and selected indigenous population groups in the Arctic depend on the rates of consumption of locally-derived terrestrial and freshwater foodstuffs,...
Understanding how internal climate variability influences arctic regions is required to better forecast future global climate variations. This paper investigates an annually-laminated (varved) record from the western Canadian Arctic and finds that the varves are negatively correlated with both the instrumental Pacific Decadal Oscillation (PDO) during the past century and also with reconstructed...
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