JapanFlux2024 CN-In1 Inner Mongolia dune

Dune is a small hill consisting sand piled up by the wind.The sand moves during winter and spring by strong wind,in special case , the sand moves perfectly from the original location to the other place,that is shifting dune.The coarse(1-0.25 mm in grain size)and fine(0.25-0.05 mm in grain site) sands are mostly contained in the soi.The micrometeorological measurements were conducted from 1990 to 1994.In 1990 and 1991,the site was located on a hill top of shifting dune,1.3km east from the Naiman Station.The measurement mast was located on the top of the hilly shifting dune,where the ground surface level was 4-5 m higher than the surrounding lowland.The length of the dune of the measurement site was 500m for east-west direction and 300m for north-south direction.
During the measurement period in 1992 to1994,the measurement site was located on a different dune,1.9km north-east from the Naiman Station.The dune spreads about 400m squares for each direction.At both sites,there were few plants and the vegetation coverage at each site was less than 5%.
In the sandy land, there exists hollows at lowlands among dunes.The hollow is 3-5m lower than the surrounding dunes and extends over a distance of 10 -500 m for both width and length.
There were small patches of ponds in the rainy season.
The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the Heat balance Bowen ratio method and the Gradient method.