It looks like the European Space Agency's Soil Moisture & Ocean Salinity ( SMOS ) Project might be a possible solution.
Here is a link to the program webpage: http://www.esa.int/Our_Activities/Observing_the_Earth/SMOS/Mapping_soil_moisture_and_ocean_salinity Here is the webpage called How To Get Earth Observation Data : http://www.esa.int/Our_Activities/Observing_the_Earth/How_to_get_Earth_observation_data It appears that most of the data might be free!! Here is a story from Phys.org: http://phys.org/news/2013-08-scientists-soil-moisture-satellites.html It also looks like the accuracy of the data may be within 4%. It looks like NASA will launch a satellite capable of measuring Soil Moisture and Freeze/Thaw State in Oct. 2014: http://science1.nasa.gov/missions/smap/ Erik ________________________________ From: Alexandre Fadigas de Souza <[email protected]> To: [email protected] Sent: Wednesday, August 28, 2013 7:00 PM Subject: [ECOLOG-L] Soil humidity from topographic data? Dear friends, I have a number of soil-related variables, and need to estimate soil humidity. Would someone know how? We have collected topographic (elevation, slope, convexity), soil (texture and nutrients), and vegetation cover data from 85 5 x 5 m plots scattered through a sandy coastal vegetation complex in northeastern Brazil, which include sand dunes as well as latosols. We did not have enough funding or time to measure soil humidity in the filed, but our analyses would greatly benefit from an estimation of it. Do you have an idea on how to do that? Many thanks, Alexandre
