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The bandpass covariance method is proposed by Horst and Oncley (1995) for long term measurements of scalar flux. This method is similar to the direct measurement in principle, but can be achieved by… (More)
Portable infrared CO2 sensors, such as GMT222 (VAISALA) and LI-820 (LI-COR), are often used for soil CO2 efflux measurements; however, in general, these inexpensive small sensors are relatively… (More)
Continuous long term micrometeorological CO2 flux observation has become an essential component to accurate determine CO2 uptake in terrestrial ecosystems after COP3. Because the intergovernmental… (More)
This study investigated the vertical length scales of transporting eddies calculated from multi-level turbulence measurement in the unstable roughness sublayer over a flat pine forest by using the… (More)
As a part of an estimation method of the heat storage rate within forest biomass, two simple schemes are presented for a calculation of the heat conduction into a cylindrical material. One is a… (More)
A scanning atom probe (SAP) was constructed by modifying an ultrahigh vacuum scanning tunneling mi- croscope. A unique feature of the SAP is the introduction of a funnel-shaped microextraction… (More)