Loading...
Please wait, while we are loading the content...
Modis snow cover mapping decision tree technique: snow and cloud discrimination
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Riggs, George A. Hall, Dorothy K. |
| Copyright Year | 2010 |
| Description | Accurate mapping of snow cover continues to challenge cryospheric scientists and modelers. The Moderate-Resolution Imaging Spectroradiometer (MODIS) snow data products have been used since 2000 by many investigators to map and monitor snow cover extent for various applications. Users have reported on the utility of the products and also on problems encountered. Three problems or hindrances in the use of the MODIS snow data products that have been reported in the literature are: cloud obscuration, snow/cloud confusion, and snow omission errors in thin or sparse snow cover conditions. Implementation of the MODIS snow algorithm in a decision tree technique using surface reflectance input to mitigate those problems is being investigated. The objective of this work is to use a decision tree structure for the snow algorithm. This should alleviate snow/cloud confusion and omission errors and provide a snow map with classes that convey information on how snow was detected, e.g. snow under clear sky, snow tinder cloud, to enable users' flexibility in interpreting and deriving a snow map. Results of a snow cover decision tree algorithm are compared to the standard MODIS snow map and found to exhibit improved ability to alleviate snow/cloud confusion in some situations allowing up to about 5% increase in mapped snow cover extent, thus accuracy, in some scenes. |
| File Size | 2979062 |
| Page Count | 11 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100033322 |
| Archival Resource Key | ark:/13960/t88h3m79q |
| Language | English |
| Publisher Date | 2010-06-08 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Imaging Spectrometers Constraints Snow Decision Theory Surface Properties Modis Radiometry Mapping Snow Cover Trees Mathematics Occultation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
