Results 81 to 90 of about 21,404,104 (365)
Influence of CO2 observations on the optimized CO2 flux in an ensemble Kalman filter [PDF]
Atmospheric Chemistry and Physics, 2014 In this study, the effect of CO2 observations on an analysis of surface CO2 flux was calculated using an influence matrix in the CarbonTracker, which is an inverse modeling system for estimating surface CO2 flux based on an ensemble Kalman filter.
J. Kim, H. M. Kim, C.-H. Cho
doaj +1 more source
Remote Sensing, 2022 Spaceborne microwave radiometer observations play vital roles in surface parameter retrievals and data assimilation, but widespread radio-frequency interference (RFI) signals in the C-band channel result in a lack of valuable data over large areas ...
Wangbin Shen +3 more
doaj +1 more source
Global GRACE Data Assimilation for Groundwater and Drought Monitoring: Advances and Challenges
Water Resources Research, 2019 The scarcity of groundwater storage change data at the global scale hinders our ability to monitor groundwater resources effectively. In this study, we assimilate a state‐of‐the‐art terrestrial water storage product derived from Gravity Recovery and ...
Bailing Li +23 more
semanticscholar +1 more source
Particle Filters and Data Assimilation [PDF]
Annual Review of Statistics and Its Application, 2018 State-space models can be used to incorporate subject knowledge on the underlying dynamics of a time series by the introduction of a latent Markov state process. A user can specify the dynamics of this process together with how the state relates to partial and noisy observations that have been made.
Fearnhead, Paul, Künsch, Hans
openaire +3 more sources
Advanced Materials, EarlyView.Reversible protonic ceramic electrochemical cells (R‐PCECs) face challenges from sluggish and unstable oxygen reduction and evolution reactions in the air electrode. This review discusses recent progress in triple‐conducting air electrodes, emphasizing mechanisms, performance factors, and design strategies, offering guidance for creating efficient and ...
Xi Chen +8 more
wiley +1 more source
Remote Sensing, 2022 Soil moisture is a key variable of the climate system. Microwave remote sensing has become an essential means of obtaining soil moisture because of the unique advantages of its all-day and all-weather observation capability.
Xuesong Bai +3 more
doaj +1 more source
Data Assimilation: A Mathematical Introduction [PDF]
, 2015 These notes provide a systematic mathematical treatment of the subject of data ...
Law, K. J. H. +2 more
core
A Time-parallel Approach to Strong-constraint Four-dimensional Variational Data Assimilation
, 2015 A parallel-in-time algorithm based on an augmented Lagrangian approach is proposed to solve four-dimensional variational (4D-Var) data assimilation problems.
Rao, Vishwas, Sandu, Adrian
core +1 more source
Initiation of ensemble data assimilation [PDF]
Tellus A: Dynamic Meteorology and Oceanography, 2006 The specification of the initial ensemble for ensemble data assimilation is addressed. The presented work examines the impact of ensemble initiation in the Maximum Likelihood Ensemble Filter (MLEF) framework, but is also applicable to other ensemble data assimilation algorithms.
Bahri Uzunoglu +7 more
openaire +3 more sources
Advanced Materials, EarlyView.This review provides the state‐of‐the‐art overview of halide perovskite‐based photocatalysts for hydrogen production from water and halogen acid solutions, CO2 reduction into value‐added chemicals, and organic chemical transformations. Different types of halide perovskite photocatalysts and their relative efficiencies for hydrogen generation and CO2 ...
Siddharth Singh +8 more
wiley +1 more source