The findings and conclusions in this article are those of the author(s) and do not necessarily represent the views of the U.S. Citation of the source, as given above, is requested. doi: 10.3996/012014-JFWM-008Ĭopyright: All material appearing in the Journal of Fish and Wildlife Management is in the public domain and may be reproduced or copied without permission unless specifically noted with the copyright symbol. Historical retreat of alpine glaciers in the Ahklun Mountains, western Alaska. Received: JanuAccepted: DecemPublished Online Early: January 2015 Published: June 2015Ĭitation: Walsh P, Kaufman D, McDaniel T, Chowdhry Beeman J. Keywords: Ahklun Mountains Alaska glaciers recession At this rate, it is likely that all Ahklun Mountain glaciers will be extinguished by the end of the current century. Using aerial imagery of a subset of 76 glaciers at three time steps between 19, we determined the average rate of areal loss was 45% over 52 y. Of 109 glaciers originally mapped, 10 (9%) had disappeared. We surveyed for presence or absence of the glaciers by fixed-wing aircraft in 2006. Geological Survey using photogrammetry methods based on 1972-1973 aerial photos. The glaciers were originally mapped by the U.S. The flexible design of GLIMS make it easy to interface to other scales and instruments.The Ahklun Mountains support the only extant glaciers in southwestern Alaska north of the Alaska Peninsula. If you have instruments not listed please contact us. GLIMS imports from the following air samplers: Anderson, R&P (manual and sequential) and BGI and GLIMS links to both the Mettler and Sartorius Scales. GLIMS generates reports in both delimitated and non-delimitated formats. GLIMS can then generate reports for AIRS, net weight, particulate concentrations, scale accuracy, and quality control information. Additionally, full editing features allow the user to manually enter information directly into the database for documentation. The technician can import field sampler data into the database at this time. When filters are returned to the laboratory, each filter is weighed again and the program records the gross weight. Sampler Run Data Sheets are printed to accompany filters out to the field. Temperature and relative humidity information can be viewed in a graphic display, allowing technicians to easily monitor lab conditions. This data can be used for documenting ambient conditions to support quality control reporting. Additionally, the program records temperature and relative humidity in the laboratory, via a data translator. The filter is placed on the scale and the program reads the tare weight of the filter, adding it to the database record. Developed as a custom solution for a research laboratory, GLIMS is now a commercial product used by State and County Air Quality Management Districts to manage their collection, measurement and reporting of particulate data.įor each filter, GLIMS creates a database record and optionally generates a bar coded label which is applied to a filter container (and can be scanned at any time to recall the database record). GLIMS is a comprehensive Gravimetric Laboratory Information System that collects data from particulate dust monitors, reads filter labels via bar codes, records filter weights via a serial interface to a precision scale, collects temperature and humidity data required for quality assurance and creates formatted particulate air quality reports and quality assurance reports required by state and federal agencies.
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