搜索结果: 1-9 共查到“地球科学总论 Covariance”相关记录9条 . 查询时间(0.046 秒)
Impact of a time-dependent background error covariance matrix on air quality analysis
Surface of assimilation system analysis of ozone the covariance matrix data assimilation system physical state
2014/12/10
In this article we study the influence of different characteristics of our assimilation system on surface ozone analyses over Europe. Emphasis is placed on the evaluation of the background error covar...
Construction of non-diagonal background error covariance matrices for global chemical data assimilation
Chemical data assimilation To optimize the noise Model predictions Chemical state
2014/12/9
Chemical data assimilation attempts to optimally use noisy observations along with imperfect model predictions to produce a better estimate of the chemical state of the atmosphere. It is widely accept...
Towards global empirical upscaling of FLUXNET eddy covariance observations:validation of a model tree ensemble approach using a biosphere model
global empirical upscaling FLUXNET eddy covariance observations ensemble approach
2010/1/21
Global, spatially and temporally explicit estimates of carbon and water fluxes derived from empirical up-scaling eddy covariance measurements would constitute a new and possibly powerful data stream t...
Quality control of CarboEurope flux data – Part 2:Inter-comparison of eddy-covariance software
Quality control CarboEurope flux data Inter-comparison eddy-covariance software
2010/1/15
As part of the quality assurance and quality control activities within the CarboEurope-IP network, a comparison of eddy-covariance software was conducted. For four five-day datasets, CO2 flux estimate...
Methodical study of nitrous oxide eddy covariance measurements using quantum cascade laser spectrometery over a Swiss forest
Methodical study nitrous oxide eddy covariance measurements quantum cascade
2010/1/14
Nitrous oxide fluxes were measured at the Lägeren CarboEurope IP flux site over the multi-species mixed forest dominated by European beech and Norway spruce. Measurements were carried out during ...
Suitability of quantum cascade laser spectroscopy for CH4 and N2O eddy covariance flux measurements
Suitability quantum cascade laser spectroscopy CH4 N2O eddy covariance flux measurements
2010/1/14
A quantum cascade laser spectrometer was evaluated for eddy covariance flux measurements of CH4 and N2O using three months of continuous measurements at a field site. The required criteria for eddy co...
Towards a standardized processing of Net Ecosystem Exchange measured with eddy covariance technique:algorithms and uncertainty estimation
standardized processing Net Ecosystem Exchange eddy covariance technique
2010/1/13
Eddy covariance technique to measure CO2, water and energy fluxes between biosphere and atmosphere is widely spread and used in various regional networks. Currently more than 250 eddy covariance sites...
Nitrous oxide emissions from a beech forest floor measured by eddy covariance and soil enclosure techniques
Nitrous oxide emissions beech forest floor eddy covariance soil enclosure techniques
2010/1/12
Spring time nitrous oxide (N2O) emissions from an old beech (Fagus sylvatica L.) forest were measured with eddy covariance (EC) and chamber techniques. The aim was to obtain information on the spatial...
Globally covering a-priori regional gravity covariance models
GOCE mission Covariance function Spacewise approach`
2010/1/22
Gravity anomaly data generated using Wenzel’s GPM98A model complete to degree 1800, from which OSU91A has been subtracted, have been used to estimate covariance functions for a set of globally coverin...