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气象学报（英文版）
中国气象学会
气象学报（英文版）

中国气象学会

丁一汇

双月刊

0894-0525

cmsams@163.com

010-68407634

100081

北京中关村南大街46号

气象学报（英文版）/Journal Acta Meteorologica SinicaCSCDCSTPCD北大核心SCI
查看更多>>中国气象学会的官方刊物《气象学报》于1925年7月创刊。英文版于1987年9月创刊，1988年至2008年出版季刊，2009年改为双月刊。
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    Reduced Spring Precipitation Bias and Associated Physical Causes over South China in FGOALS-f3 Climate Models:Experiments with the Horizontal Resolutions

    Peng ZIYimin LIUJiandong LIRuowen YANG...
    784-804页
    查看更多>>摘要：Considerable spring precipitation occurs over South China(SC),a region that is adjacent to large-scale Asian topo-graphy and oceans.Its reasonable simulation is crucial for improving regional climate predictability.This study in-vestigates spring precipitation biases over SC and their possible causes in atmosphere-only and coupled Flexi-ble Global Ocean-Atmosphere-Land System finite-volume version 3(FGOALS-f3)models with different horizon-tal resolutions.The performance of spring precipitation simulation over SC varies across different FGOALS-f3 mo-del versions,with the best reproducibility in the high-resolution coupled model(25 km).In the low-resolution atmo-sphere-only model(100-125 km),the precipitation dry bias over SC is closely linked to overestimated surface sens-ible forcing over the eastern Tibetan Plateau(TP),which weakens the subtropical anticyclone over the western Pa-cific(SAWP)through regional circulation responses.By contrast,the high-resolution atmosphere-only model further amplifies surface thermal forcing in the Asian continents,causing intensified land-sea thermal contrast between the Southeast Asian continents and western Pacific,enhanced southerly winds and SAWP,and increased water vapor transport into SC.Meanwhile,the reduced middle-high level cold bias over 10°-30°N in the high-resolution atmo-sphere-only model intensifies the East Asian westerly jet and ascent over SC,leading to enhanced spring precipita-tion there.The high-resolution coupled model simulation not only reduces sea surface cold bias over the Bay of Bengal,thus intensifying the Indian-Burma trough and strengthening low-level water vapor transport into SC,but also enhances ascent over SC.As a result,the high-resolution coupled model better reproduces the magnitude and pattern of spring precipitation over SC than its atmosphere-only model.Compared with low-resolution models,the domain-mean spring precipitation dry bias decreases by 11.2％over SC in the high-resolution atmosphere-only mo-del and by 35.9％in the coupled model.These results demonstrate that the high-resolution FGOALS-f3 models can improve simulations of the influencing atmospheric circulations and spring precipitation over SC.
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    Rainfall Sensitivity to Microphysics and Planetary Boundary Layer Parameterizations in Convection-Permitting Simulations over Northwestern South America

    K.Santiago HERNáNDEZSebastián GóMEZ-RíOSJuan J.HENAVanessa ROBLEDO...
    805-825页
    查看更多>>摘要：Convection-permitting modeling allows us to understand mechanisms that influence rainfall in specific regions.However,microphysics parameterization(MP)and planetary boundary layer(PBL)schemes remain an important source of uncertainty,affecting rainfall intensity,occurrence,duration,and propagation.Here,we study the sensitiv-ity of rainfall to three MP[Weather Research and Forecasting(WRF)Single-Moment 6-class(WSM6),Thompson,and Morrison]and two PBL[the Yonsei University(YSU)and Mellor-Yamada Nakanishi Niino(MYNN)]schemes with a convection-permitting resolution(4 km)over northwestern South America(NWSA).Simulations were per-formed by using the WRF model and the results were evaluated against soundings,rain gauges,and satellite data,considering the spatio-temporal variability of rainfall over diverse regions prone to deep convection in NWSA.MP and PBL schemes largely influenced simulated rainfall,with better results for the less computationally expensive WSM6 MP and YSU PBL schemes.Regarding rain gauges and satellite estimates,simulations with Morrison MP overestimated rainfall,especially westward of the Andes,whereas the MYNN PBL underestimated precipitation in the Amazon-Savannas flatlands.We found that the uncertainty in the rainfall representation is highly dependent on the region,with a higher influence of MP in the Colombian Pacific and PBL in the Amazon-Savannas flatlands.When analyzing rainfall-related processes,the selection of both MP and PBL parameterizations exerted a large influ-ence on the simulated lower tropospheric moisture flux and moisture convergence.PBL schemes significantly influ-enced the downward shortwave radiation,with MYNN simulating a greater amount of low clouds,which decreased the radiation income.Furthermore,latent heat fluxes were greater for YSU,favoring moist convection and rainfall.MP schemes had a marked impact on vertical velocity.Specifically,Morrison MP showed stronger convection and higher precipitation rates,which is associated with a·greater latent heat release due to solid-phase hydrometeor form-ation.This study provides insights into assessing physical parameterizations in numerical models and suggests key processes for rainfall representation in NWSA.
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    Sensitivity Simulations of the 30 March 2020 Xichang Wildfire in Southwest China Based on the WRF-Fire Model

    Yujue LIUShiguang MIAOHanbin ZHANG
    826-843页
    查看更多>>摘要：This paper describes a fire forecast system—Weather Research and Forecasting-Fire(WRF-Fire)—that is em-ployed to simulate a real wildfire case in Xichang,Sichuan Province,Southwest China on 30 March 2020 at a 100-m resolution over the fire area,in order to provide a fine representation of the terrain and fuel heterogeneities and expli-citly resolve the atmospheric turbulence.Four sensitivity experiments were conducted to analyze the impacts of at-mospheric model grid spacing and fire-atmosphere interaction on simulated meteorological fields and fire behavior.The results indicate that finer horizontal grid spacing in the atmospheric model improves the accuracy of wind,tem-perature,and moisture simulations in the near surface layer.Especially,it can better describe local wind field charac-teristics,capture microscale wind speed fluctuations,and produce more significant effect from fire-atmosphere inter-action.The mass and energy released by the fire model and its feedback to the atmospheric model exhibit enhanced heterogeneous characteristics.The simulated fire area aligns well with the observation,with KAPPA coefficient(KC)of 0.56-0.59 and spatial correlation coefficient(SC)of 0.52-0.59.For this real case,the influence of heterogeneous land surface on the fire behavior is much greater than the atmosphere-fire interaction.The study suggests that WRF-Fire holds high potential as a real wildfire simulation tool,offering a new and feasible approach for fire prediction.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据