The Relationship between Anthropogenic Nitrogen Oxides and Ozone Trends in the Arctic Troposphere

1993 ◽  
pp. 105-115 ◽  
Author(s):  
Dan Jaffe
Keyword(s):  
Nitrogen Oxides ◽  
The Arctic ◽  
Ozone Trends ◽  
Anthropogenic Nitrogen ◽  
The Relationship

The seasonal cycle of nitrogen oxides in the Arctic troposphere at Barrow, Alaska

1992 ◽  
Vol 97 (D18) ◽  
pp. 20615 ◽  
Author(s):  
Richard E. Honrath ◽  
Daniel A. Jaffe
Keyword(s):  
Nitrogen Oxides ◽  
Seasonal Cycle ◽  
The Arctic

scholarly journals Energy Cost of Running in an Arctic Fox, Alopex lagopus

2003 ◽  
Vol 117 (3) ◽  
pp. 430 ◽  
Author(s):  
Eva Fuglei ◽  
Nils A. Øritsland
Keyword(s):  
Heart Rate ◽  
Metabolic Rate ◽  
Energy Cost ◽  
The Arctic ◽  
Arctic Fox ◽  
Alopex Lagopus ◽  
Energy Cost Of Running ◽  
Radio Transmitters ◽  
The Relationship ◽  
Determine Effect

This work was conducted to determine effect of season and starvation on metabolic rate during running in the Arctic Fox (Alopex lagopus) on Svalbard (78°55’N, 11°56’E), Norway. Indirect calorimetry was used to measure metabolic rate of foxes running on a treadmill and heart rate was monitored using implanted radio transmitters. The relationship between heart rate and metabolic rate was also examined. Metabolic rate increased with running speed. In July the metabolic rate during running almost fitted general equations predicted for mammals, while it was up to 20% lower in January, indicating seasonal variation in metabolic rate. There was a significant positive linear relationship between heart rate and weight specific metabolic rate, suggesting that heart rate can be used as an indicator of metabolic rate. Starvation for 11 days decreased the net cost of running by 13% in January and 17% in July, suggesting that a starved fox runs more energetically efficient than when fed. Heart rate measured in July decreased by 27% during starvation. Re-feeding reversed the starvation-induced reduction in metabolic rate and heart rate during running almost up to post-absorptive levels. The present results are from one fox, and must be considered as preliminary data until further studies are conducted.

scholarly journals Issues of wind mode visualization and pedestrian comfort assessment when designing residential buildings on sloping territories in the Arctic zone

2019 ◽  
Vol 64 ◽  
pp. 03013 ◽  
Author(s):  
Ilya V. Dunichkin ◽  
Emanuele Naboni ◽  
Anna E. Korobeinikova ◽  
Olga I. Poddaeva
Keyword(s):  
Urban Areas ◽  
Residential Buildings ◽  
The Arctic ◽  
Wind Regime ◽  
Local Climate ◽  
Factors Affecting ◽  
Aerodynamic Roughness ◽  
The Stability ◽  
Relationship Of ◽  
The Relationship

Subject of research: visualization of the wind regime of residential buildings on the slope area in the Arctic. Goals: the purpose of the study is to identify the problems of visualization of the wind regime on the slopes and the analysis of patterns of airflow around the sloping territories, affecting the comfort of pedestrians. Materials and methods: airflow patterns of slope areas with different characteristics and comfort assessment for humans are analyzed in the course of work. Geotechnical methods are presented in solving the problems of wind erosion and the stability of hillsides and complex terrain within the city limits. Results: The importance and novelty of the research in studying the relationship of slope geometry and environmental quality, as a decrease in comfort inevitably leads to a decrease in the development of nearby urban areas in settlements on the coast of the Arctic Ocean, problems with climate and local climate, as well as a decrease in the quality of life of people. The article considers the relationship of plastic relief with the aeration regime of the territory, the dependence of aerodynamic roughness on their height, features of aeration of the slope and hilly terrain, factors affecting the direction and speed of the wind and methods for studying the aeration regime of slope areas. Findings: The possibilities of applying existing approaches to research and visualization for slope areas are demonstrated. The direction of development of the technique for visualization of slope areas has been determined.

Cultural continuity and Inuit health in Arctic Canada

2019 ◽  
Vol 74 (1) ◽  
pp. 64-70 ◽  
Author(s):  
Sarah Lynn Newell ◽  
Michelle L Dion ◽  
Nancy C Doubleday
Keyword(s):  
First Nations ◽  
Community Involvement ◽  
Positive Association ◽  
Aboriginal Peoples ◽  
The Arctic ◽  
Cultural Continuity ◽  
Research Association ◽  
Access To Services ◽  
Self Rated Health ◽  
The Relationship

BackgroundPrevious research association increased levels of cultural continuity and decreased rates of youth suicide in First Nations communities. We investigate the relationship between cultural continuity and self-rated health looking specifically at Inuit living in the Canadian Arctic.MethodsThe Arctic Supplements of the Aboriginal Peoples Survey from years 2001 and 2006 were appended to explore the relationship between various measures of cultural continuity and self-rated health. These measures include access to government services in an Aboriginal language, Inuit cultural variables, community involvement and governance. Literature related to Inuit social determinants of health and health-related behaviours were used to build the models.ResultsAll measures of cultural continuity were shown to have a positive association with self-rated health for Inuit participants. Background and other control variables influenced the strength of the association but not the direction of the association. Access to services in an Aboriginal language, harvesting activities and government satisfaction were all significantly related to the odds of better health outcomes. Finally, the study contributes a baseline from a known data horizon against which future studies can assess changes and understand future impacts of changes.ConclusionThe Canadian government and other agencies should address health inequalities between Inuit and non-Inuit people through programmes designed to foster cultural continuity at a community level. Providing access to services in an Aboriginal language is a superficial way of promoting cultural alignment of these services; however, more inclusion of Inuit traditional knowledge is needed to have a positive influence on health.

scholarly journals Are Hotspots Always Hotspots? The Relationship between Diversity, Resource and Ecosystem Functions in the Arctic

PLoS ONE ◽  
2013 ◽  
Vol 8 (9) ◽  
pp. e74077 ◽  
Author(s):  
Heike Link ◽  
Dieter Piepenburg ◽  
Philippe Archambault
Keyword(s):  
The Arctic ◽  
Ecosystem Functions ◽  
The Relationship

Major influence of BrO on the NOx and nitrate budgets in the Arctic spring, inferred from Δ17O(NO3 - ) measurements during ozone depletion events

2007 ◽  
Vol 4 (4) ◽  
pp. 238 ◽  
Author(s):  
S. Morin ◽  
J. Savarino ◽  
S. Bekki ◽  
A. Cavender ◽  
P. B. Shepson ◽  
...  
Keyword(s):  
Nitrogen Oxides ◽  
Isotopic Composition ◽  
Atmospheric Chemistry ◽  
Ozone Depletion ◽  
Lower Atmosphere ◽  
The Arctic ◽  
Major Influence ◽  
Peroxy Radicals ◽  
Bromine Oxide ◽  
Atmospheric Nitrate

Environmental context. Ozone depletion events (ODEs) in the Arctic lower atmosphere drive profound changes in the chemistry of nitrogen oxides (NOx) because of the presence of bromine oxide (BrO). These are investigated using the isotopic composition of atmospheric nitrate (NO3–), which is a ubiquitous species formed through the oxidation of nitrogen oxides. Since BrO is speculated to play a key role in the atmospheric chemistry of marine regions and in the free troposphere, our studies contribute to the improvement of the scientific knowledge on this new topic in atmospheric chemistry. Abstract. The triple oxygen isotopic composition of atmospheric inorganic nitrate was measured in samples collected in the Arctic in springtime at Alert, Nunavut and Barrow, Alaska. The isotope anomaly of nitrate (Δ17O = δ17O–0.52δ18O) was used to probe the influence of ozone (O3), bromine oxide (BrO), and peroxy radicals (RO2) in the oxidation of NO to NO2, and to identify the dominant pathway that leads to the production of atmospheric nitrate. Isotopic measurements confirm that the hydrolysis of bromine nitrate (BrONO2) is a major source of nitrate in the context of ozone depletion events (ODEs), when brominated compounds primarily originating from sea salt catalytically destroy boundary layer ozone. They also show a case when BrO is the main oxidant of NO into NO2.

scholarly journals Coming of age? Asian Arctic research, 2004–2013

Polar Record ◽  
2015 ◽  
Vol 52 (2) ◽  
pp. 134-143 ◽  
Author(s):  
Iselin Stensdal
Keyword(s):  
Climate Change ◽  
Social Science ◽  
Science Studies ◽  
Coming Of Age ◽  
Publication Output ◽  
Political Influence ◽  
Natural Sciences ◽  
The Arctic ◽  
Asian Countries ◽  
The Relationship

ABSTRACTThis article surveys ten years of Asian involvement with Arctic research, from 2004 to 2013. The Asian countries have consolidated their Arctic research efforts, with publication output, funding and infrastructure showing a marked increase from 2008. Most of this research is in the natural sciences and relates to climate change, but there is also an emerging branch of social science studies. National polar institutes play important roles as links between the science communities and governments. Asian polar research still focuses more on Antarctica than the Arctic. As to the relationship between research and policies, there is little evidence that the Asian governments have aspirations of gaining political influence through their Arctic research.

scholarly journals Trends of ozone total columns and vertical distribution from FTIR observations at eight NDACC stations around the globe

2015 ◽  
Vol 15 (6) ◽  
pp. 2915-2933 ◽  
Author(s):  
C. Vigouroux ◽  
T. Blumenstock ◽  
M. Coffey ◽  
Q. Errera ◽  
O. García ◽  
...  
Keyword(s):  
Time Series ◽  
Southern Oscillation ◽  
Multiple Regression Model ◽  
Atmospheric Composition ◽  
The Arctic ◽  
Stepwise Multiple Regression ◽  
Quasi Biennial Oscillation ◽  
Solar Absorption ◽  
Ozone Trends ◽  
Stepwise Multiple Regression Model

Abstract. Ground-based Fourier transform infrared (FTIR) measurements of solar absorption spectra can provide ozone total columns with a precision of 2% but also independent partial column amounts in about four vertical layers, one in the troposphere and three in the stratosphere up to about 45km, with a precision of 5–6%. We use eight of the Network for the Detection of Atmospheric Composition Change (NDACC) stations having a long-term time series of FTIR ozone measurements to study the total and vertical ozone trends and variability, namely, Ny-Ålesund (79° N), Thule (77° N), Kiruna (68° N), Harestua (60° N), Jungfraujoch (47° N), Izaña (28° N), Wollongong (34° S) and Lauder (45° S). The length of the FTIR time series varies by station but is typically from about 1995 to present. We applied to the monthly means of the ozone total and four partial columns a stepwise multiple regression model including the following proxies: solar cycle, quasi-biennial oscillation (QBO), El Niño–Southern Oscillation (ENSO), Arctic and Antarctic Oscillation (AO/AAO), tropopause pressure (TP), equivalent latitude (EL), Eliassen–Palm flux (EPF), and volume of polar stratospheric clouds (VPSC). At the Arctic stations, the trends are found mostly negative in the troposphere and lower stratosphere, very mixed in the middle stratosphere, positive in the upper stratosphere due to a large increase in the 1995–2003 period, and non-significant when considering the total columns. The trends for mid-latitude and subtropical stations are all non-significant, except at Lauder in the troposphere and upper stratosphere and at Wollongong for the total columns and the lower and middle stratospheric columns where they are found positive. At Jungfraujoch, the upper stratospheric trend is close to significance (+0.9 ± 1.0% decade−1). Therefore, some signs of the onset of ozone mid-latitude recovery are observed only in the Southern Hemisphere, while a few more years seem to be needed to observe it at the northern mid-latitude station.

scholarly journals Photochemistry in the Arctic Free Troposphere: Ozone Budget and Its Dependence on Nitrogen Oxides and the Production Rate of Free Radicals

2004 ◽  
Vol 47 (2) ◽  
pp. 107-138 ◽  
Author(s):  
Craig Stroud ◽  
Sasha Madronich ◽  
Elliot Atlas ◽  
Christopher Cantrell ◽  
Alan Fried ◽  
...  
Keyword(s):  
Free Radicals ◽  
Nitrogen Oxides ◽  
Production Rate ◽  
The Arctic ◽  
Free Troposphere ◽  
Troposphere Ozone
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