Results 61 to 70 of about 50,580 (230)

Fast Fourier Transform Ensemble Kalman Filter with Application to a Coupled Atmosphere-Wildland Fire Model

, 2010
We propose a new type of the Ensemble Kalman Filter (EnKF), which uses the Fast Fourier Transform (FFT) for covariance estimation from a very small ensemble with automatic tapering, and for a fast computation of the analysis ensemble by convolution ...
Beezley, Jonathan D., Kondratenko, Volodymyr Y., Mandel, Jan   +2 more
core   +1 more source

Representation of Soil Moisture Feedbacks during Drought in NASA Unified WRF (NU-WRF)

Journal of Hydrometeorology, 2013
Abstract Positive soil moisture–precipitation feedbacks can intensify heat and prolong drought under conditions of precipitation deficit. Adequate representation of these processes in regional climate models is, therefore, important for extended weather forecasts, seasonal drought analysis, and downscaled climate change projections. This
Benjamin F. Zaitchik, Joseph A. Santanello, Sujay V. Kumar, Christa D. Peters-Lidard   +3 more
openaire   +1 more source

Physically consistent mesoscale model evaluation in complex terrain

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study introduces a novel approach for evaluating mesoscale atmospheric models in complex terrain by selecting physically consistent grid points and applying height‐based corrections. The method corrects for sensor height and terrain elevation differences between model and observations using a time‐varying lapse rate.
Gaspard Simonet, Mathias W. Rotach, Manuela Lehner   +2 more
wiley   +1 more source

Sensitivity of the surface temperature to changes in total solar irradiance calculated with the WRF model

Geofísica Internacional, 2014
En este trabajo se estima la sensibilidad de la temperatura del modelo WRF a cambios en la Radiación Solar Total (RST). Las simulaciones se realizaron para una región centrada en el Atlántico norte, incluyendo partes del Este de Norteamérica, Oeste de ...
Carolina Cipagauta, Blanca Mendoza, Jorge Zavala-Hidalgo   +2 more
doaj   +1 more source

Numerical simulations of the impacts of mountain on oasis effects in arid Central Asia [PDF]

, 2017
The oases in the mountain-basin systems of Central Asia are extremely fragile. Investigating oasis effects and oasis-desert interactions is important for understanding the ecological stability of oases.
De Maeyer, Philippe, Hamdi, Rafiq, Kurban, Alishir, Luo, Geping, Qiu, Yuan, Wang, Xinxin, Zhang, Miao   +6 more
core   +3 more sources

Assessing wildfire dynamics during a megafire in Portugal using the MesoNH/ForeFire coupled model

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Weather conditions affect megafires by inducing different fire behaviors over several days or weeks. The coupled MesoNH/ForeFire code was used to represent the dynamics of fire generating pyro‐convective clouds. To advance the understanding of wildfire dynamics, high‐resolution coupled fire–atmosphere modeling was employed.
Cátia Campos, Flavio Tiago Couto, Filippe L. M. Santos, Paulo Pinto, Carolina Purificação, Hugo Miguel Silva, João Rio, Manuel Lopes, Roberta Baggio, Jean‐Baptiste Filippi, Maria José Monteiro, Daniele Bortoli, Rui Salgado   +12 more
wiley   +1 more source

The role of soil moisture in the inland penetration of Indian monsoon low‐pressure systems

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We use the Advanced Weather Research and Forecasting model to examine the role of soil moisture in the inland penetration of Indian monsoon low‐pressure systems (LPSs). We find that LPSs penetrate deeply into India despite a dry land surface; however, their inland penetration is adversely affected when there is a reduction in the total surface heat ...
Akshay Deoras, Kieran M. R. Hunt, Andrew G. Turner   +2 more
wiley   +1 more source

Investigating the relationship between the frequency of thunderstorms and temperature trend in Mashhad

تحقيقات جغرافيايی, 2017
This study examined the relationship between frequency of thunderstorms and the mean temperature in the city of Mashhad. For this purpose, the average of monthly and annual temperatures data and average of monthly and annual frequency of thunderstorms ...
Seyyedeh Mahboobeh Moosavi, Azar Zarrin, Abbas Mofidi, Seyyedeh Fatemeh Hosseini   +3 more
doaj  

The Braer storm revisited [PDF]

, 2013
The Braer storm of January 1993 was the deepest ever recorded cyclone outside of the Tropics with a minimum core pressure of 914mbar, but due to its track between Scotland and Iceland it caused little damage and was never intensively examined.
Knippertz, P, Odell, L, Parkes, B, Pickering, S, Roberts, A   +4 more
core   +1 more source

Mesoscale and microphysical processes leading to extreme hourly rainfall prior to the merger of two mesoscale convective systems in Central China

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Short‐term extreme rainfall can be produced by the variation of low‐level warm moist airflow during mesoscale convective systems (MCSs) approaching another. The cold outflow of the rapidly moving MCS intensifies the warm moist airflow in front, enhancing the convergence and ascending motion in the quasi‐stationary MCS.
Xiaoyu Gao, Yali Luo, Jinfang Yin, Chong Wu   +3 more
wiley   +1 more source