MOD10 MODIS Snow product for New Zealand

This Report assembles an eleven year time series for the period 2001 to 2011 of snow cover area in New Zealand. A dataset is prepared based on the MODIS/Terra Snow Cover 8-Day L3 Global 500m Grid, Version 5 data (MOD10A2.5, available from the National Snow and Ice Data Center NSIDC, Boulder, Colorado USA). The MOD10A2.5 dataset indicates the maximum snow cover extent over an eight-day compositing period. It provides a seamless coverage of snow presence at regularly spaced time intervals, while minimizing the obscuration by clouds. Each year is composed of 46 epochs, each of 8 consecutive days starting on the first day of the year and extending in to the next year. An algorithm based on a trajectory analysis of land cover through time is used to infer the status of remaining pixels obscured by cloud in the composite period. This leads to a time series of virtually cloud-free composite snow cover maps that are readily imported into GIS packages for analysis of spatial and temporal variability.
 
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Identification

Data identification

Citation

Date ( Creation )
2012-05-28T13:54:00
Date ( Revision )
2012-05-28T13:54:00
Purpose
This dataset was assembled to enable NIWA to assess the suitability of the MODIS MOD10 snow product for: (i) validation of output of snow models (ii) assimilation into operational snow models 
Credit
The data were assembled by Dr Pascal Sirguey of Otago University, under contract from NIWA. The project was sponsored by Drew Lorrey with funding from project CLCO1201, and led by Ross Woods, with advice from Tim Kerr 
Status
Completed  

  Principal investigator

  User

Spatial representation type
Vector  
Topic category
  • Climatology, meteorology, atmosphere
  • Geoscientific information
  • Imagery base maps earth cover

Extent

Description
New Zealand 

coordinates

No information provided.
N
S
E
W


TimePeriod
2001-01-01T00:00:002011-12-31T00:00:00 
  • snow, remote sensing, modis, new zealand
NIWA Project Codes
  • CLCO1202
Use limitation
Many limitations of MODIS MOD10 cloud recognition and snow cover algorithms persist into this product. Cloud maybe be misclassified as snow or vice versa. 

Security constraints

Use limitation
Awaiting review by Drew Lorrey on what access is appropriate 
Classification
 

Locale

Language
English  

Character encoding

No information provided.
 

Lineage

Lineage

Statement
Publicly available MODIS MOD10 snow cover data were transformed by Pascal Sirguey, as described in accompanying report. "Assessing the use of MOD10 MODIS Snow product for New Zealand" Pascal Sirguey School of Surveying, University of Otago, PO Box 56, Dunedin, New Zealand May 2012 Prepared for NATIONAL INSTITUTE FOR WATER AND ATMOSPHERIC RESEARCH (NIWA) Report 12-002.001.R1.0 

Scope

Hierarchy level
Dataset  

Text

No information provided.
 

Ref. system

Reference system

No information provided.
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326

Reference system identifier
NZST/NZDT

 

Md. constraints

Security constraints

Use limitation

No information provided.
Classification
 
 

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