Satellite observations are expected to play an important role in studying carbon fluxes. However, it is necessary properly remove spatiotemporal bias from these observations. In this study, we estimated the satellite XCO2 data by making inversion of in-situ Compared GOSAT concentrations derived analysis, global average difference −1.26 ppm, with a −0.76 ppm over land and −1.54 ocean. We then de...

the compact finite difference schemes have been found to give simple ways of reaching the objectives of high accuracy and low computational cost. during the past two decades, the compact schemes have been used extensively for numerical simulation of various fluid dynamics problems. these methods have also been applied for numerical solution of some prototype geophysical fluid dynamics problems ...

Deblurring the Gaussian blur, which is a fundamental problem of signal analysis, has deeed a satisfactory solution. The principal reason for the dii-culty is the inherently ill{conditioned blur{matrix which poses a challenge to its stable inversion. Most of the literature is concerned with a solution to the problem in restricted domains, and this solution is, in many cases, characterized by inv...

Adjoint tomography has been recently applied to ambient seismic noise and teleseismic P waves separately unveil fine-scale lithospheric structures beyond the resolving ability of traditional ray-based traveltime tomography. In this study, we propose an inversion scheme that alternates between frequency-dependent inversions surface waveform take advantage their complementary sensitivities Earth'...

the 1h and natural-abundance 13c-nmr spectra of 1-thiacyclooctan-3-one (1) have been measured from 25 to -100°c. coalescence is observed in the 1h-nmr spectra of (1) at about -80°c, and attributed to ring inversion in a boat-chair conformation, which is the predominant conformation of (1). the free energy of activation (dg¹) for this process is 9.2±0.2 kcal/mol. the 13c-nmr spectra of (1) is te...

We present a multigrid algorithm for the solution of distributed parameter inverse problems constrained by variable-coefficient linear parabolic partial differential equations. We consider problems in which the inversion variable is a function of space only; for stability we use an L2 Tikhonov regularization. The main feature of our algorithm is that its convergence rate is mesh-independent—eve...