Identification

Title

A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment

Alternative title(s)

106.ARCSS130

Abstract

In this study, the locations of 193 old aerial photographs of northern Alaskan landscapes were rephotographed and assessed for changes in vegetation. The original photographs were taken over northern Alaska between 1948 and 1951, and the new photographs were taken between 1999 and 2003. The region covered by the original and repeat photographs stretches from the southern extent of the Brooks Range in the south to the Coastal Plain in the north, and from the Chukchi Sea in the west to the Canning River in the east. The original photographs were taken by the U.S. military as part of geologic reconnaissance and exploration, and the method used to acquire them was to fly both sides of a river valley while photographing the river and the facing valley slopes. Of the several thousand original photographs, only a fraction were repeated for the purpose of assessing vegetation change. Repeat photographs were selected for geographic coverage and to produce the greatest likelihood of detecting vegetation change. The original and repeat photographs were then scanned and stored in TIFF format. Individual image file sizes range from 5 to 60 MB each, and the total file size for the data set is approximately 11 GB. The images should not be published without the consent of the investigators.

Resource type

dataset

Resource locator

https://data.eol.ucar.edu//dataset/106.ARCSS130

protocol: https

name: A Half-Century of Change in Arctic Alaskan Shrubs: A Photographic-Based Assessment homepage

description: Dataset homepage

Unique resource identifier

code

106.ARCSS130

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2014-10-16

Keyword set

keyword value

Aerial Photographs

Keyword set

keyword value

Arctic

Ancillary Info

Land Character

Photography

Keyword set

keyword value

EARTH SCIENCE > CLIMATE INDICATORS > BIOSPHERIC INDICATORS

EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER

EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > VEGETATION COVER

originating controlled vocabulary

title

reference date

date type

revision

effective date

2018-02-27

Geographic location

West bounding longitude

-165.00000

East bounding longitude

-145.00000

North bounding latitude

70.00000

South bounding latitude

68.00000

Temporal reference

Temporal extent

Begin position

1948-01-01T01:01:00Z

End position

2003-12-31T23:59:59Z

Dataset reference date

date type

publication

effective date

2011-05-17T09:08:45Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

none

Limitations on public access

none

Responsible organisations

Responsible party

contact position

EOL Data Support

organisation name

UCAR/NCAR - Earth Observing Laboratory

full postal address

PO Box 3000

Boulder

80307-3000

email address

datahelp@eol.ucar.edu

web address

https://data.eol.ucar.edu/

name: homepage

responsible party role

pointOfContact

Responsible party

organisation name

US Army

full postal address

Cold Regions Research and Engineering Laboratory PO Box 35170

Ft Wainwright

99703-0170

telephone number

(970) 353-5183

email address

msturm@crrel.usace.army.mil

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

contact position

EOL Data Support

organisation name

UCAR/NCAR - Earth Observing Laboratory

full postal address

PO Box 3000

Boulder

80307-3000

email address

datahelp@eol.ucar.edu

web address

https://data.eol.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata date

2024-02-07T22:49:59Z

Metadata language