ForWarn II

Satellite-Based Change Recognition and Tracking


Tracking Gypsy Moth emergence and severity with magnitude and duration

Wed, 07/27/2016 - 11:48 -- stevenorman
Gypsy Moth defoliation was extensive in 2015 in northeastern Pennsylvania

Remote sensing is adept at identifying and qualifying many forest disturbances, but there remains a substantial need to further quantify actual impacts in many cases. Traditionally, vegetation change-detection approaches, such as that used by ForWarn, identify and measure disturbance severity as the magnitude of change of some measure of reflected light between two dates or periods. ForWarn tracks the percent change in NDVI relative the prior year or years, with this index falling or rising as foliage cover shifts.

Gypsy Moth and Southern Pine Beetle Defoliation in Connetquot River State Park Preserve, Long Island, NY

Mon, 07/11/2016 - 10:07 -- wchristie

ForWarn has detected anomalies in the Connetquot River State Park Preserve and the surrounding area in Long Island, NY from June 8 to July 12, 2016. Gypsy Moths and Southern Pine Beetles have historical association with this data and the likely cause of this event.

Drought in Sequoia National Forest, CA

Mon, 06/06/2016 - 08:57 -- wchristie

ForWarn has identified several potential threats to the Sequoia National Forest, California in May, 2016. Potential drought-induced delay in spring greennup created elevation banding within the forest. There is historical decline in vegetation greenness due to the western pine beetle causing tree mortality as well as tree vulnerability to disease during this time of year.

Insect Disturbance in MA

Fri, 06/03/2016 - 13:58 -- wchristie

ForWarn indicated a disturbance in Plymouth, Barnstable, and Dukes Counties of Massachusetts. May through June 2016, an insect infestation of gall wasps and gypsy moths caused defoliation in the Eastern Massachusetts area.


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