Results 81 to 90 of about 5,044 (260)

Precipitation Characteristics and Thermodynamic‐Convection Coupling in Global Kilometer‐Scale Simulations

Journal of Advances in Modeling Earth Systems
We compare three global kilometer‐scale models (ICON, IFS and NICAM) to clarify the advantages and challenges of high‐resolution global weather and climate modeling, using different approaches to represent convection, from fully parameterized to fully ...
Daisuke Takasuka, Tobias Becker, Jiawei Bao   +2 more
doaj   +1 more source

Sensitivity of tropical orographic precipitation to wind speed with implications for future projections [PDF]

Weather and Climate Dynamics
Some of the rainiest regions on Earth lie upstream of tropical mountains, where the interaction of prevailing winds with orography produces frequent precipitating convection.
Q. Nicolas, Q. Nicolas, W. R. Boos, W. R. Boos   +3 more
doaj   +1 more source

Is the Tropical Atmosphere in Convective Quasi-Equilibrium?

Journal of Climate, 2015
AbstractThe hypothesis of convective quasi-equilibrium (CQE) has dominated thinking about the interaction between deep moist convection and the environment for at least two decades. In this view, deep convection develops or decays almost instantly to remove any changes of convective instability, making the tropospheric temperature always tied to the ...
Taotao Qian, Jia-Lin Lin, Toshiaki Shinoda, Shuanglin Li   +3 more
openaire   +1 more source

The relationship between equatorial wave interaction and heavy rainfall in Southeast Asia

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study examines the statistical relationship between co‐occurring equatorial waves and heavy rainfall in Southeast Asia. Heavy rainfall is more closely related to combined wave activity than to individual waves in many regions of Southeast Asia. The figure shows GPM–IMERG rainfall (shading) and ERA5 850‐hPa winds (vectors) composited on days when ...
Samantha Ferrett, John Methven, Oscar Martinez‐Alvarado, Xiangbo Feng, Thomas H. A. Frame, Christopher E. Holloway, Steven J. Woolnough, Gui‐Ying Yang   +7 more
wiley   +1 more source

Dynamical Downscaling of Climate Simulations in the Tropics

Geophysical Research Letters
The long‐existing double‐Intertropical Convergence Zone (ITCZ) problem in global climate models (GCMs) hampers accurate climate simulations in the tropics. Using a regional climate model (RCM) over the tropical and sub‐tropical Atlantic with a horizontal
Shuchang Liu, Christian Zeman, Christoph Schär   +2 more
doaj   +1 more source

Entraining CAPE and a simplified instability index for better assessment of environmental conditions of quasi‐stationary linear precipitation systems

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Quasi‐stationary linear precipitation systems (QSLPSs) are a major cause of heavy rainfall in Japan, persisting over the same region for more than five hours. This study demonstrates that entraining convective available potential energy (E‐CAPE), which accounts for environmental air entrainment during parcel ascent, more accurately characterises the ...
Eigo Tochimoto, Kenta Sueki, Yasutaka Hirockawa, Teruyuki Kato, Wataru Mashiko, Hiroshi Niino   +5 more
wiley   +1 more source

Longwave Radiative Feedback Due To Stratiform and Anvil Clouds

Geophysical Research Letters
Studies have implicated the importance of longwave (LW) cloud‐radiative forcing (CRF) in facilitating or accelerating the upscale development of tropical moist convection. While different cloud types are known to have distinct CRF, their individual roles
Emily Luschen, James Ruppert
doaj   +1 more source

A Machine Learning Assisted Development of a Model for the Populations of Convective and Stratiform Clouds

Journal of Advances in Modeling Earth Systems, 2020
Traditional parameterizations of the interaction between convection and the environment have relied on an assumption that the slowly varying large‐scale environment is in statistical equilibrium with a large number of small and short‐lived convective ...
Samson Hagos, Zhe Feng, Robert S. Plant, Alain Protat   +3 more
doaj   +1 more source

How interference between the North Atlantic Oscillation and the tropical Indo‐Pacific convection modulates wave trains along the subtropical jet: Impacts on the Asian winter climate

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study reveals that the combined effects of the North Atlantic Oscillation (NAO) and anomalous Indo‐Pacific Walker circulation on the excitation of the wave train along the wintertime subtropical jet strongly depend on their phase combination. Their impacts interfere constructively or destructively over South Asia, leading to notable differences in
Yuki Asazuma, Masaya Kuramochi, Hiroaki Ueda   +2 more
wiley   +1 more source

Transitions toward a Mid-heavy State of Tropical Convection

Journal of Geophysical Research: Atmospheres
Abstract This study analyzes the thermodynamic effects of atmospheric vertical motion recorded in satellite observations to investigate the processes behind the evolution of tropical convection. These processes, difficult to observe directly, are diagnosed from satellite retrievals of precipitation (
Hirohiko Masunaga, Hanii Takahashi
openaire   +1 more source