Annual Reports
All the survey reports listed below detail the activities of the JIRP survey program during the summer field seasons. These reports discuss the methodology employed for the GPS surveys, identify the profiles surveyed, and present the results of the survey work. Evaluation of the temporal and spatial changes of movement vectors and surface elevation changes are also discussed. All data contained in these reports were collected via static, rapid static, and real-time methods in differential mode.

  Geodetic Activities During the 1994 JIRP Field Season (3.10 MB)
  Geodetic Activities During the 1995 JIRP Field Season (1.59 MB)
  Geodetic Activities During the 1996 JIRP Field Season (1.74 MB)
  Geodetic Activities During the 1997 JIRP Field Season (2.30 MB)
  Geodetic Activities During the 1998 JIRP Field Season (1.14 MB)
  Geodetic Activities During the 1999 JIRP Field Season (3.72 MB)
  Geodetic Activities During the 2000 JIRP Field Season (4.30 MB) 
  Geodetic Activities During the 2001 JIRP Field Season (5.70 MB)
  Geodetic Activities During the 2004 JIRP Field Season (3.20 MB)
  JIRP 2007 Survey Summary (5 MB PowerPoint presentation)

 

Other Survey-related Reports

  Geodetic Activities, Juneau Icefield, Alaska, 1981-1996 (103 MB)
This report summarizes survey activities on the Juneau Icefield from 1981 through 1996. It was compiled by Walter Welsch and Martin Lang.

  Surface Velocity Changes on the Taku Glacier System - 1993 to 2007 (1.4 MB)

  A Comparison of Methods for Determining the Surface Mass Balance of a GPS Surveyed Movement Profile (2.25 MB)
This paper evaluates two different methods of calculating volume and height change across the areal extent of a surveyed plot. One method relies on the interpolation and construction of a surface model via kriging. The other method is non-interpolative, relying instead on only the observed surface height change at each of the surveyed points.

  Using GPS to Determine Local Surface Mass Balance: A Case Study on the Taku Glacier, Alaska (0.64 MB)
This report applies the two methods described in the previous paper to the surface elevation data collected at Profile 4 of the Taku Glacier, Juneau Icefield, Alaska.

   JIRP Movement Profile Stake-out Coordinates (6.7 MB)
This booklet provides the Easting and Northing stake-out coordinates for all GPS-surveyed profiles on the Juneau Icefield. The coordinates are used in the annual establishment of the profiles with real-time GPS, thus ensuring that the proper locations are surveyed for annual comparisons of surface velocity and elevation. Last update: April, 2007.