Results 71 to 80 of about 448,336 (218)

Aerosol, Clouds and Radiation Interactions in the NCEP Unified Forecast Systems

Meteorology
In this study, we evaluate aerosol, cloud, and radiation interactions in GFS.V17.p8 (Global Forecast System System Version 17 prototype 8). Two experiments were conducted for the summer of 2020. In the control experiment (EXP CTL), aerosols interact with
Anning Cheng, Fanglin Yang
doaj   +1 more source

Development of the CMA-GFS-AERO 4D-Var assimilation system v1.0 – Part 1: System description and preliminary experimental results [PDF]

Geoscientific Model Development
We developed a strongly coupled aerosol–meteorology four-dimensional variational (4D-Var) assimilation system, CMA-GFS-AERO 4D-Var, for investigating the feedback of aerosol data assimilation on meteorological forecasts.
Y. Liu, Y. Liu, Y. Liu, X. Zhang, X. Zhang, W. Han, W. Han, W. Han, C. Wang, C. Wang, C. Wang, W. Jia, W. Jia, D. Wang, D. Wang, Z. Zhuang, Z. Zhuang, Z. Zhuang, X. Shen, X. Shen, X. Shen   +20 more
doaj   +1 more source

Active microwave sensing of the atmosphere, chapter 4 [PDF]

The use of active microwave systems to study atmospheric phenomena is studied. Atmospheric pollution, weather prediction, climate and weather modification, weather danger and disaster warning, and atmospheric processes and interactions are ...

core   +1 more source

Probabilistic temperature forecasting based on an ensemble AR modification

, 2015
To address the uncertainty in outputs of numerical weather prediction (NWP) models, ensembles of forecasts are used. To obtain such an ensemble of forecasts the NWP model is run multiple times, each time with different formulations and/or initial or ...
Groß, Jürgen, Möller, Annette
core   +1 more source

Predicting Inflation: Professional Experts Versus No-Change Forecasts [PDF]

, 2010
We compare forecasts of United States inflation from the Survey of Professional Forecasters (SPF) to predictions made by simple statistical techniques. In nowcasting, economic expertise is persuasive. When projecting beyond the current quarter, novel yet
Gneiting, Tilmann, Thorarinsdottir, Thordis L.   +1 more
core  

Prediction Space Weather Using an Asymmetric Cone Model for Halo CMEs

, 2007
Halo coronal mass ejections (HCMEs) are responsible of the most severe geomagnetic storms. A prediction of their geoeffectiveness and travel time to Earth's vicinity is crucial to forecast space weather.
A. Dal Lago, C. Wu, D.F. Webb, G. Michalek, G. Michalek, G. Michalek, G. Michalek, G.E. Brueckner, G.M. Lindsay, H. Cremades, H. Xie, H. Xie, H.V. Cane, J. Chen, J. Chen, J. Chen, J. Krall, J. Zhang, J.-P. Delaboudiniére, K.P. Dere, K.W. Ogilvie, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Srivastava, O.C. Cyr St., P.K. Manoharan, R.P. Lepping, S. Yashiro, S. Yashiro, S.P. Plunkett, S.W. Kahler, T.G. Forbes, V. Yurchyshyn, X.P. Zhao, Y.-J. Moon   +39 more
core   +1 more source

Projecting Northern Hemisphere Flow Regime Transition Using Integrated Enstrophy

Atmosphere, 2020
Integrated enstrophy (IE) is the square of vorticity integrated over an entire hemisphere at a particular level in the atmosphere. Previous work has shown this quantity is correlated to the positive Lyapunov Exponent for hemispheric flow, and as such is ...
Emily Klaus, Patrick Market, Anthony Lupo, Michael Bodner, Joshua Kastman   +4 more
doaj   +1 more source

Improving the predictability of take-off times with Machine Learning : a case study for the Maastricht upper area control centre area of responsibility [PDF]

, 2018
The uncertainty of the take-off time is a major contribution to the loss of trajectory predictability. At present, the Estimated Take-Off Time (ETOT) for each individual flight is extracted from the Enhanced Traffic Flow Management System (ETFMS ...
Ballerini, Franck, Belkoura, Seddik, Dalmau Codina, Ramon, Naessens, Herbert, Wagnick, Sebastian   +4 more
core  

Predictability of catastrophic events: material rupture, earthquakes, turbulence, financial crashes and human birth

, 2001
We propose that catastrophic events are "outliers" with statistically different properties than the rest of the population and result from mechanisms involving amplifying critical cascades.
Broecker, D. Sornette, Geller, Gould, Jones, Lamaign  re, McWilliams, Papiernik, Sornette, Sornette   +9 more
core   +2 more sources

Effect of Horizontal Resolution on a Meso‐β‐Scale Vortex Simulation in an Extreme Rainstorm on 22 May 2020 Over South China: A Contrastive Study Based on Different‐Resolution Ensembles

Earth and Space Science
A transient extreme rainstorm that occurred over Guangzhou city, China, on 22 May 2020, has been investigated based on two ensemble prediction systems (EPSs), one with 9‐km (TRAMS9km‐EPS) and the other with 3‐km (TRAMS3km‐EPS) grid spacings, respectively.
Guanshun Zhang, Xubin Zhang, Zhaoli Yang
doaj   +1 more source