Results 51 to 60 of about 506,951 (266)

Quantifying Long-Term Land Surface and Root Zone Soil Moisture over Tibetan Plateau

Remote Sensing, 2020
It is crucial to monitor the dynamics of soil moisture over the Tibetan Plateau, while considering its important role in understanding the land-atmosphere interactions and their influences on climate systems (e.g., Eastern Asian Summer Monsoon). However,
Ruodan Zhuang, Yijian Zeng, Salvatore Manfreda, Zhongbo Su   +3 more
doaj   +1 more source

Soil Moisture Satellite Data Under Scrutiny: Assessing Accuracy Through Environmental Proxies and Extended Triple Collocation Analysis

Earth Systems and Environment
16 different satellite soil moisture (SM) datasets (passive, active, combined, and model data) were compared at the European scale. We hypothesized that SM should be reflected by a variety of environmental factors, such as topography, hydroclimatology ...
Angelika Pataki, L. Bertalan, L. Pásztor, Loránd Attila Nagy, Dávid Abriha, Shunlin Liang, Sudhir Kumar Singh, Szilárd Szabó   +7 more
semanticscholar   +1 more source

Characterization of precipitation product errors across the US using multiplicative Triple Collocation [PDF]

Hydrology and Earth System Sciences, 2015
Abstract. Validation of precipitation estimates from various products is a challenging problem, since the true precipitation is unknown. However, with the increased availability of precipitation estimates from a wide range of instruments (satellite, ground-based radar, and gauge), it is now possible to apply the Triple Collocation (TC) technique to ...
S. H. Alemohammad, K. A. McColl, A. G. Konings, D. Entekhabi, A. Stoffelen   +4 more
openaire   +6 more sources

Cross-Examination of Similarity, Difference and Deficiency of Gauge, Radar and Satellite Precipitation Measuring Uncertainties for Extreme Events Using Conventional Metrics and Multiplicative Triple Collocation

Remote Sensing, 2020
Quantifying uncertainties of precipitation estimation, especially in extreme events, could benefit early warning of water-related hazards like flash floods and landslides. Rain gauges, weather radars, and satellites are three mainstream data sources used
Zhi Li, Mengye Chen, Shang Gao, Zhen Hong, Guoqiang Tang, Yixin Wen, Jonathan J. Gourley, Yang Hong   +7 more
doaj   +1 more source

Evaluation of Long Time-Series Soil Moisture Products Using Extended Triple Collocation and In Situ Measurements in China

Atmosphere, 2023
Currently, satellite-based soil moisture (SM) products and land surface model assimilation techniques are widely utilized. However, the presence of systematic errors in the observation process, algorithmic discrepancies between products, and variations ...
Liumeng Zhang, Yaping Yang, Yangxiaoyue Liu, Xiafang Yue   +3 more
semanticscholar   +1 more source

Pseudospectral Calculation of the Wavefunction of Helium and the Negative Hydrogen Ion

, 2010
We study the numerical solution of the non-relativistic Schr\"{o}dinger equation for two-electron atoms in ground and excited S-states using pseudospectral (PS) methods of calculation.
A. J. Thakkar, B. Fornberg, C. Canuto, David F. Chernoff, G. Arfken, J. P. Boyd, M. Barrett, P. G. Burke, Paul E. Grabowski, T. L. John, T. N. Rescigno, V. A. Fock, V. A. Fock, W. H. Press, W. M. Huo   +14 more
core   +1 more source

Coordinate Space HFB Calculations for the Zirconium Isotope Chain up to the Two-Neutron Dripline

, 2005
We solve the Hartree-Fock-Bogoliubov (HFB) equations for deformed, axially symmetric even-even nuclei in coordinate space on a 2-D lattice utilizing the Basis-Spline expansion method.
A. Blazkiewicz, A. S. Umar, C. De Boor, J. Dobaczewski, M. Stoitsov, V. E. Oberacker, V. E. Oberacker   +6 more
core   +1 more source

Numerical periodic normalization for codim 2 bifurcations of limit cycles : computational formulas, numerical implementation, and examples [PDF]

, 2013
Explicit computational formulas for the coefficients of the periodic normal forms for codimension 2 (codim 2) bifurcations of limit cycles in generic autonomous ODEs are derived.
De Witte, Virginie, Della Rossa, Fabio, Govaerts, Willy, Kuznetsov, Yuri A   +3 more
core   +1 more source

Assessment and Data Fusion of Satellite-Based Precipitation Estimation Products over Ungauged Areas Based on Triple Collocation without In Situ Observations

Remote Sensing, 2023
Reliable assessment of satellite-based precipitation estimation (SPE) and production of more accurate precipitation data by data fusion is typically challenging in sparsely gauged and ungauged areas. Triple collocation (TC) is a novel assessment approach
Xiaoqing Wu, Jialiang Zhu, Chengguang Lai   +2 more
semanticscholar   +1 more source

A Reference-Free Method for the Thematic Accuracy Estimation of Global Land Cover Products Based on the Triple Collocation Approach

Remote Sensing, 2023
Global land cover (GLC) data are an indispensable resource for understanding the relationship between human activities and the natural environment. Estimating their classification accuracy is significant for studying environmental change and sustainable ...
Pengfei Chen, Huabing Huang, Wenzhong Shi, R. Chen   +3 more
semanticscholar   +1 more source