Results 61 to 70 of about 99,075 (290)

Seasonal Characteristics of Mesoscale Convective Systems Over the Philippines

International Journal of Climatology, EarlyView.
This study examines how mesoscale convective systems (MCSs) over the Philippines are most frequent during boreal summer, while those in winter are longer‐lived and more intense due to cold surges and enhanced easterly moisture transport. Intraseasonal oscillations, such as the Madden‐Julian Oscillation (MJO) and the Boreal Summer Intraseasonal ...
Cathrene Lagare, Junshi Ito, Takeshi Yamazaki, Giuseppe Torri   +3 more
wiley   +1 more source

Residuals of Tropospheric Delays from GNSS Data and Ray-Tracing as a Potential Indicator of Rain and Clouds

Remote Sensing, 2018
The Global Navigation Satellite System (GNSS) is commonly recognized by its all-weather capability. However, observations depend on atmospheric conditions which requires the induced tropospheric delay to be estimated as an unknown parameter.
Paweł Hordyniec, Jan Kapłon, Witold Rohm, Maciej Kryza   +3 more
doaj   +1 more source

A comparison of two schemes for the convective transport of chemical species in a Lagrangian global chemistry model [PDF]

, 2002
We have developed a detailed parametrization scheme to represent the effects of subgrid-scale convective transport in a three-dimensional chemistry-transport model (CTM). The CTM utilizes the meteorological fields generated by a general-circulation model
Berntsen, Brasseur, C. E. Johnson, Chock, Collins, Cullen, D. S. Stevenson, Dabdub, Dentener, Doty, Gidel, Gregory, Hutter, Jacob, Jacob, Jaeglé, Johns, Kanakidou, Kanakidou, Kritz, Lacis, Lawrence, Lee, Lin, Liu, Madronich, Mahowald, Mari, Methven, Penner, Pickering, Prather, Price, R. G. Derwent, Rasch, Smith, Stevenson, Stevenson, Stevenson, Thompson, Thuburn, W. J. Collins, Walton, Zaucker   +43 more
core   +2 more sources

On the Temporal Variability of Precipitation in Iraq: Arid‐Wet Years and Extreme Events

International Journal of Climatology, EarlyView.
Daily and monthly precipitation data in Iraq display high seasonal to interdecadal variability, with arid and wet years that have very distinct seasonal cycles. Monthly rainfall is significantly correlated with the Indian Ocean Dipole. Extreme events are identified and classified as belonging to four different weather patterns, allowing to obtain daily
Ali Raheem Al‐Nassar, Josep L. Pelegrí, Pánfilo Masciángioli   +2 more
wiley   +1 more source

Metrology of Nanoparticles

CHIMIA
In the past decades, several measurement techniques have been developed and continuously optimized to specifically analyze airborne nanoparticles. Nanoparticles have gained significant importance in fields such as air quality research, climate studies ...
Oliver F. Bischof, Heinz Burtscher, Martin Fierz   +2 more
doaj   +1 more source

Tropospheric and Ionospheric Modeling Using GNSS Time Series in Volcanic Eruptions (La Palma, 2021)

Engineering Proceedings, 2023
The signal coming from the artificial satellites of the GNSS system suffers various effects that considerably decrease the precision in solving the positioning problem. To mathematically model these effects, the atmosphere is divided into two main parts,
Paola Barba, Javier Ramírez-Zelaya, Vanessa Jiménez, Belén Rosado, Elena Jaramillo, Mario Moreno, Manuel Berrocoso   +6 more
doaj   +1 more source

How Well Do CMIP6 Models Simulate the Influence of the West African Westerly Jet on Sahel Precipitation?

International Journal of Climatology, EarlyView.
Climate models generally reproduce the WAWJ and August peak but simulate its onset prematurely and too strongly relative to ERA5. CMIP6 simulations struggle to reproduce the jet–precipitation relationship in the Sahel and underrepresent associated moisture transports.
Akintunde I. Makinde, Babatunde J. Abiodun, Rachel James, Richard Washington, Ellen Dyer, Tom Webb   +5 more
wiley   +1 more source

MieAI: a neural network for calculating optical properties of internally mixed aerosol in atmospheric models

npj Climate and Atmospheric Science
Aerosols influence weather and climate by interacting with radiation through absorption and scattering. These effects heavily rely on the optical properties of aerosols, which are mainly governed by attributes such as morphology, size distribution, and ...
Pankaj Kumar, Heike Vogel, Julia Bruckert, Lisa Janina Muth, Gholam Ali Hoshyaripour   +4 more
doaj   +1 more source

Seasonal cycles of ozone and oxidized nitrogen species in northeast Asia - 2:A model analysis of the roles of chemistry and transport [PDF]

, 2002
[1] The dominant factors controlling the seasonal variations of ozone (O-3) and three major oxidized nitrogen species, peroxyacetyl nitrate (PAN), nitrogen oxides (NOx), and nitric acid (HNO3), in northeast Asia are investigated by using a three ...
Akimoto, H, Furutani, H, Hashimoto, S, Kato, S, Komazaki, Y, Makide, Y, Tanaka, S, Tanimoto, H, Wild, O   +8 more
core   +1 more source

Alaskan Ridge Blocking and Associated Winter Cold Conditions Over North America

International Journal of Climatology, EarlyView.
Multi‐decadal (1979–2023) analysis reveals that wintertime reductions in the meridional gradient of potential vorticity (PVy) over the Bering Sea are recurrent but episodic features of North Pacific circulation. These suppressed PVy states consistently co‐occur with amplified Alaskan ridging, weakened mid‐tropospheric westerlies and a downstream warm ...
Varunesh Chandra, James E. Overland, Muyin Wang   +2 more
wiley   +1 more source