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Remote Sensing and Invasive Species

Submitted by ORNL DAAC Staff on 2020-05-26
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Searching for the term remote sensing and words related to invasive species (invasive, nonnative, exotic, or nonindigenous) in Google Scholar reveals an increasing number of publications each year using these terms.

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A new Earthdata article describes how researchers are using remote sensing to map invasive species.

Surveying the Ecological Effects of Fire on Alaska's Yukon-Kuskokwim Delta

Submitted by ORNL DAAC Staff on 2020-05-18
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Vegetation point-intercept (VPI) any-hit cover metric data were combined with Landsat imagery to develop fractional maps of any-hit cover for four aggregated plant functional types (PFTs);  shrubs bryophytes, lichen, and herbs for the upland tundra area of the Y-K Delta, Alaska. VPI data were collected from plots in areas burned in 1971, 1985, 2005, and 2015.

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Ecological field data and maps of vegetation cover spanning gradients of fire history in upland tundra are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

WAVeTrends: Trends in Woody and Herbaceous Vegetation

Submitted by ORNL DAAC Staff on 2020-05-18
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Concurrent woody and herbaceous vegetation changes between the 1982-1991 and 2004-2013 decades of the Sudano-Sahel region of Africa. (A) Map of vegetation change categories. (B) Chart showing the conceptual position and the relative abundance of each category in a 2-D space.

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Vegetation change data spanning the West African Sudano-Sahel region is now available.

Seasonality of Photosynthetic Performance

Submitted by ORNL DAAC Staff on 2019-11-25
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Simulated and observed seasonal patterns of canopy SIF (740 nm) for (a, c) absolute SIF and (b, d) normalized canopy SIF for CLM simulation year 2010. Both a satellite SIF product (GOME-2) and the PhotoSpec measurements are included for comparison.

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Three related datasets from the Carbon Monitoring System (CMS) program describe year-round photosynthetic activity in a conifer forest.

Soil Moisture and Tree Measurements at Harvard Forest

Submitted by ORNL DAAC Staff on 2019-11-04
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Upward-facing photo of the canopy at Harvard Forest (transect 2, plot 57) on 2012-10-18.

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Ground-based data collected at the Harvard Forest site was used to validate Airborne Microwave Observatory of Subcanopy and Subsurface (AirMOSS) soil moisture estimates.