ForWarn II

Satellite-Based Change Recognition and Tracking


Hail Damage in MS

Mon, 04/11/2016 - 08:18 -- wchristie

ForWarn has detected a potentially ephemeral disturbance after a severe storm in March-April, 2016 in Lincoln, Lawrence and Jefferson Davis counties of Mississippi. Hail from the storm possibly damaged early greening understory and tree foliage.

Weather Damage in the Ozark-St. Francis National Forest, AR

Mon, 05/18/2015 - 08:43 -- wchristie

ForWarn discovered an anomaly in the Ozark-St. Francis National Forest, Arkansas. A severe weather event harshly hit Mt. Magazine and the south slopes. High elevation trees were partially leafed out which were damaged by the hail streak. The behavior of this anomaly is consistent with severe weather damage in other areas, running linearly from southwest to northeast.

Mapping the urban phenological footprint

Wed, 03/18/2015 - 21:44 -- stevenorman
The start of greenup for a mixed urban-agricultural Minnesota landscape

Urban areas are renowned for their admixture of species and vegetation types that can change from one parcel to the next. Yards and woodland parks intermix with road medians--all of which may be dominated by an irregular mix of native and exotic trees, shrubs, herbs and grasses. In cities, the vegetation of nearly every block is compositionally complex.

The typical start of greenup on agricultural lands

Wed, 03/18/2015 - 09:56 -- stevenorman
ForWarn's start of green-up for croplands

Understanding the normal start of greenup for croplands is important because it provides a baseline to compare year to year conditions. The date of greenup for agricultural lands varies based on year-to-year climate factors, the unique responses of the specific crop or vegetation type planted, and farmers' management practices. For areas that need to be planted in the spring, wet late winters can delay planting. Cool springs can delay growth. Either can potentially influence seasonal growth and yield.

The typical start of greenup in natural vegetation

Tue, 03/17/2015 - 10:36 -- stevenorman
ForWarn's median date of start of greenup

The start of the annual growing season is among the most important climate-sensitive measures that Land Surface Phenology (LSP) products like ForWarn can provide. Warm temperatures can accelerate bud burst, and this can increase exposure to damaging spring frosts, as it did across the Southeastern US in 2007 and 2012. In natural areas, the timing of spring greenup can affect growing season duration and productivity. It can also affect the risk and impacts of disturbances, such as those from wind, hail and fire.


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