Methods and apparatus for measuring gas flux
US10060942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2012 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Aug 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01W1/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for measuring turbulent gas flux using high-speed vertical wind speed measurements (e.g., on the order of 5-10 Hz or more frequently) and low-speed gas content measurements (e.g., on the order of 5 Hz or less frequently), without the need for the sophisticated and expensive high-speed hardware to separate gas samples (e.g., into accumulation bags) according to updrafts and downdrafts. A time series of high-speed vertical wind speed data is used as a guide to distinguish between updrafts and downdrafts. When vertical wind speed is upward (updraft), the low-speed gas content is recorded into a data structure in one location, or marked with one flag. When vertical wind speed is downward (downdraft), the low-speed gas content is recorded into a different location, or marked with a different flag. Eddy Accumulation or Relaxed Eddy Accumulation computations can be performed using the stored gas content data to determine gas flux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.