Erratum: Grasses of the Canadian Arctic Archipelago: a DELTA database for interactive identification and illustrated information retrieval

1997 ◽  
Vol 75 (3) ◽  
pp. 517-517
Author(s):  
S. G. Aiken ◽  
L. L. Consaul ◽  
M. J. Dallwitz
Keyword(s):  
Information Retrieval ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago

Saxifragaceae of the Canadian Arctic Archipelago: a contribution to a DELTA database for interactive identification and illustrated information retrieval

1998 ◽  
Vol 76 (12) ◽  
pp. 2020-2036 ◽  
Author(s):  
Susan G. Aiken ◽  
Michael J. Dallwitz ◽  
Cheryl L. McJannet ◽  
Lynn J. Gillespie ◽  
Laurie L. Consaul
Keyword(s):  
Information Retrieval ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago

Grasses of the Canadian Arctic Archipelago: a DELTA database for interactive identification and illustrated information retrieval

1996 ◽  
Vol 74 (11) ◽  
pp. 1812-1825 ◽  
Author(s):  
S. G. Aiken ◽  
L. L. Consaul ◽  
M. J. Dallwitz
Keyword(s):  
Information Retrieval ◽  
Canadian Arctic ◽  
Morphological Characters ◽  
Environmental Indicators ◽  
Herbarium Specimens ◽  
Canadian Arctic Archipelago ◽  
Type Specimens ◽  
Line Drawings ◽  
Additional Information ◽  
Annotated Checklist

A comprehensive re-assessment of grasses in the Canadian Arctic Archipelago is presented as an annotated checklist recognizing 49 taxa. Twenty-five names that have been associated with the flora of the islands are excluded. Information was recorded in a DELTA database. For taxa recognized, the following information is included: common name if applicable, place of valid publication, basionyms, limited synonymy, location of type specimens when known and whether we have seen them, 39 vegetative and 60 floral morphological characters, known chromosome number(s), distribution and habitat data, comments in an annotated checklist, and for many taxa, expanded notes conveying additional information. For 37 of the taxa, their usefulness as environmental indicators is recorded. The above information is also available for some of the excluded taxa; for all of them there are notes explaining why the taxon is excluded. The database is illustrated with 46 maps, 17 line drawings of characters useful for identifications, and photographs of 29 type specimens, 19 herbarium specimens, and 58 photographs of plants in their habitats or close up. The data are available as an INTKEY interactive identification and information-retrieval package for MS-Windows, and as natural-language descriptions in four formats: WWW pages, plain text, PostScript, and HP Laserjet files. Keywords: Poaceae, arctic, taxonomy, WWW, Internet, key.

Saxifragaceae of the Canadian Arctic Archipelago: a contribution to a DELTA database for interactive identification and illustrated information retrieval

1998 ◽  
Vol 76 (12) ◽  
pp. 2020-2036 ◽  
Author(s):  
Susan G Aiken ◽  
Michael J Dallwitz ◽  
Cheryl L McJannet ◽  
Lynn J Gillespie ◽  
Laurie L Consaul
Keyword(s):  
Information Retrieval ◽  
Habitat Preferences ◽  
Canadian Arctic ◽  
Morphological Characters ◽  
Canadian Arctic Archipelago ◽  
Environmental Indicator ◽  
Line Drawings ◽  
Additional Information ◽  
The Family ◽  
Annotated Checklist

A re-assessment of members of the family Saxifragaceae in the Canadian Arctic Archipelago is presented as a traditional key and annotated checklist that recognizes 17 taxa. The information on which this paper is based is recorded in a developing DELTA database that aims to collect the following data: place of valid publication; synonymy, usually limited to names that have been associated with the Canadian Arctic; common name(s), if applicable; vegetative and floral morphological characters; data on the distribution, including information about the northernmost record of the taxon; habitat preferences of each species; notes on the species as an environmental indicator; indigenous knowledge; and expanded notes conveying additional information. The database also contains maps, illustrations of characters useful for identification, and colour photographs and line drawings of the taxa. Appendices list characters recorded in the database, brief taxonomic notes, and a sample species description. The data are available on the Internet at http://biodiversity.uno.edu/delta/ as natural-language descriptions and as an INTKEY interactive identification and information-retrieval package for Windows.Key words: Arctic, Canada, DELTA, Internet, Saxifragaceae, taxonomy.

scholarly journals Regional variability of acidification in the Arctic: a sea of contrasts

2014 ◽  
Vol 11 (2) ◽  
pp. 293-308 ◽  
Author(s):  
E. E. Popova ◽  
A. Yool ◽  
Y. Aksenov ◽  
A. C. Coward ◽  
T. R. Anderson
Keyword(s):  
Climate Change ◽  
Primary Production ◽  
Arctic Ocean ◽  
Canadian Arctic ◽  
Atmospheric Co2 ◽  
The Arctic ◽  
Canadian Arctic Archipelago ◽  
Regional Variability ◽  
The Arctic Ocean ◽  
The Impact

Abstract. The Arctic Ocean is a region that is particularly vulnerable to the impact of ocean acidification driven by rising atmospheric CO2, with potentially negative consequences for calcifying organisms such as coccolithophorids and foraminiferans. In this study, we use an ocean-only general circulation model, with embedded biogeochemistry and a comprehensive description of the ocean carbon cycle, to study the response of pH and saturation states of calcite and aragonite to rising atmospheric pCO2 and changing climate in the Arctic Ocean. Particular attention is paid to the strong regional variability within the Arctic, and, for comparison, simulation results are contrasted with those for the global ocean. Simulations were run to year 2099 using the RCP8.5 (an Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) scenario with the highest concentrations of atmospheric CO2). The separate impacts of the direct increase in atmospheric CO2 and indirect effects via impact of climate change (changing temperature, stratification, primary production and freshwater fluxes) were examined by undertaking two simulations, one with the full system and the other in which atmospheric CO2 was prevented from increasing beyond its preindustrial level (year 1860). Results indicate that the impact of climate change, and spatial heterogeneity thereof, plays a strong role in the declines in pH and carbonate saturation (Ω) seen in the Arctic. The central Arctic, Canadian Arctic Archipelago and Baffin Bay show greatest rates of acidification and Ω decline as a result of melting sea ice. In contrast, areas affected by Atlantic inflow including the Greenland Sea and outer shelves of the Barents, Kara and Laptev seas, had minimal decreases in pH and Ω because diminishing ice cover led to greater vertical mixing and primary production. As a consequence, the projected onset of undersaturation in respect to aragonite is highly variable regionally within the Arctic, occurring during the decade of 2000–2010 in the Siberian shelves and Canadian Arctic Archipelago, but as late as the 2080s in the Barents and Norwegian seas. We conclude that, for future projections of acidification and carbonate saturation state in the Arctic, regional variability is significant and needs to be adequately resolved, with particular emphasis on reliable projections of the rates of retreat of the sea ice, which are a major source of uncertainty.

scholarly journals On the Thermal Regime of a High-Arctic Valley Glacier

1976 ◽  
Vol 16 (74) ◽  
pp. 119-133 ◽  
Author(s):  
Fritz Müller
Keyword(s):  
Thermal Regime ◽  
Energy Input ◽  
Canadian Arctic ◽  
High Arctic ◽  
Canadian Arctic Archipelago ◽  
Valley Glacier ◽  
Drilling Technique ◽  
Percolation Zone ◽  
Mean Annual Air Temperature ◽  
Upper Boundary

AbstractThe 10 m temperatures were measured over several years at 16 sites on the White Glacier (lat. 80° N.), Axel Heiberg Island, Canadian Arctic Archipelago. At three sites deep profiles were made using a new drilling technique, reaching a maximum depth of 280 m. Large differences in the 10 m temperatures between locations and from year to year were observed. The deviations of these temperatures from the almost isothermal mean annual air temperature over the glacier are discussed. The heating effect of the melt water in the lower percolation zone was found to be very important. A conceptual model is developed to assess the influence of these irregularities in the energy input at the upper boundary on the thermal regime of the entire glacier. So far a quantitative analysis has been made only for the relatively simple 30 m temperature profile measured on the tongue of the glacier.

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