MEaSUREs Wetlands dataEntry ID: MEaSUREs_Wetlands
Abstract: ASF currently archives and distributes theMEaSUREs Wetlands project. This project constructed a global-scale Earth System Data Record (ESDR) of inundated wetlands to facilitate investigations on their role in climate, biogeochemistry, hydrology, and biodiversity. The ESDR is comprised of two complementary components:
Fine-resolution, 100-meter, maps of wetland extent, vegetation type, and ... seasonal inundation dynamics, derived from Synthetic Aperture Radar (SAR) for continental-scale areas covering crucial wetland regions. These were created with newly available data (HH/HV) from the Phase Array L-Band SAR sensor mounted on the Advanced Land Observing Satellite built and operated by the Japan Aerospace Exploration Agency. The wetland products were generated using algorithms based on an object oriented image segmentation approach and a statistically based decision tree classifier.
Global, 10-day mappings of inundation extent at ~25 km resolution derived from multiple satellite remote sensing observations including passive and active microwave sensors and optical data sets optimized specifically for inundation detection. A clustering model and a mixture model comprise the classification and fractional inundation calculations of the algorithm used. Monthly data were used to construct annual summary products, including maximum spatial distribution and area, and annual inundation duration of inundated wetlands.
Comparative analyses of the high-resolution mosaic products and low-resolution inundation mappings will be conducted to harmonize the ESDR components. The 100-meter SAR based datasets of wetland features will be incorporated to validate and quantify the accuracy of the lower resolution datasets to ensure consistency within the ESDR products. Accuracy assessment of the fine scale regional wetlands data sets will take advantage of high-resolution wetlands maps available through collaborators.
Purpose: Wetlands exert major impacts on global climate, hydrology, chemistry, and biodiversity. Wetland size and timing of inundation play key roles in ecosystem dynamics. Despite the importance of these environments in the cycling of carbon and water and climate change, the extent and dynamics of global wetlands remain poorly characterized, primarily because of the scarcity of regional-to-global remote ... sensing data for understanding their distribution and dynamics.
Spaceborne microwave remote sensing offers effective tools for characterizing wetlands since it is particularly sensitive to surface water and vegetation structure. It also allows monitoring of large inaccessible areas over time regardless of atmospheric conditions or solar illumination. Through the use of remote sensing instruments, wetlands were periodically mapped and examined.
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Data Set Citation
Dataset Originator/Creator: NASA/JPL
Dataset Title: MEaSUREs WetlandsOnline Resource: https://www.asf.alaska.edu/wetlands
Start Date: 2002-01-01Stop Date: 2009-12-31
Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution Range: Monthly - < Annual
Data Set Progress
Email: kmcdonald2 at ccny.cuny.edu
CUNY Environmental Crossroads Initiative and CREST Institute The City College of New York, City University of New York MR 925, 160 Convent Ave. & W. 138th St.
City: New York
Province or State: NY
Postal Code: 10031
Whitcomb, J., M. Moghaddam, K. McDonald,J. Kellndorfer, and E. Podest, "Mapping Wetlands of Alaska from L-band SAR imagery," Canadian Journal of Remote Sensing 35, no. 1 (February 2009): 54-72, doi: 10.5589/m08-080.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-09-16
Last DIF Revision Date: 2013-09-20