for emission calculation I need a soil moisture data in weight percentage unit. so far the suitable data I found for my work is SMAP data. for my analysis I am using google earth engine. now the problem is the data available is in mm unit. I want to convert mm into weight percentage (water/soil). how can I perform this conversion? any help will be very appreciated. thank you
You can calculate soil moisture content in % as give below
Soil moisture content in %
= Moisture content in cm / Apparent specific gravity of soil
Ashok Kumar Singh thank you for your answer, in case if I don't have an apparent specific gravity but the bulk density of the soil is known what can be the solution? since for my data set soil moisture in mm and bulk density in kg/m3 are given.
SMAP carries two instruments, an L-band radar and an L-band radiometer. The L-band radar emits radio waves and receives the reflected radio waves (making up the “active” component). The amount of backscatter is dependent on the amount of moisture in the soil, the more moisture in the soil the more backscatter detected. A similar dependency allows it to detect the freeze/thaw state of an area. Meanwhile, the L-band radiometer exclusively receives radio waves emitted by the Earth’s surface (making up the “passive” component). Warmer objects, such as dry soil, radiate more energy than colder objects, such as moist soil. This energy difference is detected by the radiometer and used to map soil moisture with the assistance of the radar.
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