Atmospheric Science Letters最新文献_第2页

Assessing the Impact of Post-Fire Land-Surface Changes on Weather Forecasting in Two Forested Areas 评估火灾后地表变化对两个林区天气预报的影响

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-09-02 DOI: 10.1002/asl.1310

Siwei He

{"title":"Assessing the Impact of Post-Fire Land-Surface Changes on Weather Forecasting in Two Forested Areas","authors":"Siwei He","doi":"10.1002/asl.1310","DOIUrl":"10.1002/asl.1310","url":null,"abstract":"Wildfires have extensively burned areas worldwide, with significant impacts in various aspects of life. Among these, wildfires affect land-surface properties, such as vegetation nature and soil characteristics, from active burning to years and decades afterward. Despite this, the qualitative effects of post-wildfire conditions on short-term weather forecasting remain obscure. In this study, we investigated the impact of post-wildfire conditions on weather forecasting by considering post-wildfire land-surface conditions using the Weather Research and Forecasting (WRF) model in two burned forest areas. The changes in land-surface properties caused by wildfires were considered, including vegetation fraction, leaf area index, roughness length, emissivity, and soil hydraulic conductivity. The results show that post-wildfire land-surface properties have noticeable impacts on near-surface variables and atmospheric profiles. Over the study areas, the simulated near-surface air temperature could be approximately 1 K cooler and 0.75 g/kg moister if post-wildfire conditions are ignored, with impacts extending more than 3 km high in the vertical direction. This study also demonstrates that the effects of changes in land-surface properties over burned areas could extend to surrounding unburned areas.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 9","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://rmets.onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Revision of the Water Vapour Continuum Model and Impact on Clear-Sky Shortwave Broadband Radiative Transfer Calculations 水汽连续体模式的最新修订及其对晴空短波宽带辐射传输计算的影响

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-09-02 DOI: 10.1002/asl.1318

Kaah P. Menang

{"title":"Recent Revision of the Water Vapour Continuum Model and Impact on Clear-Sky Shortwave Broadband Radiative Transfer Calculations","authors":"Kaah P. Menang","doi":"10.1002/asl.1318","DOIUrl":"10.1002/asl.1318","url":null,"abstract":"The water vapour continuum needs to be accurately accounted for in atmospheric radiative transfer calculations. The offline ECMWF radiation scheme was used to assess the impact of the current disagreements in shortwave continuum absorption on the accuracy of clear-sky calculations of solar fluxes and heating rates from 2000 to 20,000 cm−1 for three standard atmospheres: tropical, mid-latitude summer, and sub-arctic winter. These calculations were carried out at a solar zenith angle of 45°, surface albedo of 0.2, and total solar irradiance of 1361.0 W m−2. The MT_CKD 2.5, MT_CKD 4.2, and CAVIAR continuum models were compared. These continuum models were each used to train the gas-optics tables required by the radiation scheme. Differences in the shortwave continuum have a modest impact on shortwave absorption and heating rates. The largest differences are found in the tropical atmosphere due to its higher water vapour content. Absorbed fluxes computed with MT_CKD 2.5 and MT_CKD 4.2 differ by up to ~1.3 W m−2 (0.6%) while those with CAVIAR and MT_CKD 4.2 differ by up to ~1.7 W m−2 (0.8%). The heating rate calculated with MT_CKD 2.5 is up to ~0.018 K d−1 (0.8%) less than that obtained with MT_CKD 4.2. Compared to the heating rate computed with MT_CKD 4.2, the heating rate with CAVIAR is up to ~0.035 K d−1 (1.5%) higher.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 9","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://rmets.onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Representation of Surface Temperature Trends in C3S Seasonal Forecast Systems C3S季节预报系统地表温度变化趋势的表征

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-08-13 DOI: 10.1002/asl.1316

Matthew Patterson, Daniel J. Befort, Julia F. Lockwood, John Slattery, Antje Weisheimer

引用次数: 0

Mechanistic Impacts of a Scale-Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea-Level Pressure 尺度感知对流方案对台风强度的机制影响：来自最低海平面气压的诊断

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-20 DOI: 10.1002/asl.1315

Yanjie Liu, Xiaocong Wang, Yimin Liu, Hao Miao, Xuesong Zhu, Wei Huang, Yaxin Zhao, Kai Wang

{"title":"Mechanistic Impacts of a Scale-Aware Convection Scheme on Typhoon Intensity: Diagnostics From Minimum Sea-Level Pressure","authors":"Yanjie Liu, Xiaocong Wang, Yimin Liu, Hao Miao, Xuesong Zhu, Wei Huang, Yaxin Zhao, Kai Wang","doi":"10.1002/asl.1315","DOIUrl":"10.1002/asl.1315","url":null,"abstract":"This study investigates the impact of a scale-aware convective parameterization scheme (CPS) on the simulation of typhoon track and intensity through a series of experiments using the Global-to-Regional Integrated Forecast SysTem (GRIST) model. The results of four typhoon cases show the scale-aware CPS generally reduces the track error by about 15 km and the intensity error by about 10% compared to the default CPS. By analyzing the budget equation of surface pressure tendency, we found the surface pressure fall due to CPS heating is about 0.6 hPa h−1 weaker when the scale-aware CPS is used. This is, however, compensated by enhanced microphysics heating, which more than offsets the reduction in CPS and yields a net pressure depression of about 1 hPa h−1. In fact, when parameterized convection is suppressed, the microphysics process takes up the convective instability left over by CPS and stimulates even stronger diabatic heating by 13.8%. The increased microphysics precipitation, along with the intensified grid-scale ascending, further validates the assertion. The results of this study demonstrate the benefits of scale-aware CPS on typhoon modeling.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1315","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does Warming of the Tibetan Plateau Intensify or Weaken the Precipitation Rate of Landfalling Tropical Cyclones in China? 青藏高原变暖是增强还是减弱了中国登陆热带气旋的降水量？

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-20 DOI: 10.1002/asl.1314

Gan Xu, Huijie Shi, Shoujuan Shu, Xuesong Chen, Jiabei Gu, Weijun Li

引用次数: 0

Linkage Between the Siberian Storm Track and the Winter Precipitation in China 西伯利亚风暴路径与中国冬季降水的联系

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-15 DOI: 10.1002/asl.1311

Minghao Yang, Weikai Lu, Chaohui Chen, Yongqiang Jiang, Xiong Chen

引用次数: 0

Bias Correction of Terrestrial Water Availability: Comparison of Trend-Preserving Cumulative Distribution Function Matching Methods 陆地可利用水量的偏差校正：保持趋势累积分布函数匹配方法的比较

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-15 DOI: 10.1002/asl.1312

Jingyi Li, Boqiang Qin

{"title":"Bias Correction of Terrestrial Water Availability: Comparison of Trend-Preserving Cumulative Distribution Function Matching Methods","authors":"Jingyi Li, Boqiang Qin","doi":"10.1002/asl.1312","DOIUrl":"10.1002/asl.1312","url":null,"abstract":"Terrestrial water availability, quantified by precipitation minus evapotranspiration (P−E), is essential in Earth's water cycle, whereas model simulation of P−E is still largely biased and requires a post-processing procedure. This study introduces the grid-by-grid cumulative distribution function (CDF) matching method to correct simulation bias in P−E, based on the ERA5-Land dataset and outputs from 13 selected CMIP6 global climate models. The CDF matching method has a particular advantage in preserving the trends simulated by laws of physics in climate models, and three (additive, multiplicative, and additive–multiplicative mixed) trend preservation strategies are compared in this study. The cross-validation from 1951 to 2014 indicates that all the trend preservation strategies effectively improve the simulated spatial characteristics of P−E with increased spatial correlation, enhanced sign agreement and reduced mean absolute error. Specifically, the additive strategy outperforms in improving the spatial similarity and accuracy of P−E in the humid region and global average, whereas the mixed strategy is the optimal in the hyper-arid, arid, and semi-arid regions. Furthermore, the mixed strategy has a significant advantage in preserving the signs of P−E across the globe. This study exhibits a computationally efficient statistical approach for bias correction of P−E simulation, and validates its flexible correction strategies regarding different terrestrial aridity conditions.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1312","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing Trend of Summer Monsoonal Rainfall Tied to the Extension of the South China Sea Summer Monsoon Duration 夏季季风降水增加趋势与南海夏季风持续时间延长的关系

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-03 DOI: 10.1002/asl.1308

Lang Song, Peng Hu, Wen Chen, Ruowen Yang, Tianjiao Ma, Yuqiong Zheng

{"title":"Increasing Trend of Summer Monsoonal Rainfall Tied to the Extension of the South China Sea Summer Monsoon Duration","authors":"Lang Song, Peng Hu, Wen Chen, Ruowen Yang, Tianjiao Ma, Yuqiong Zheng","doi":"10.1002/asl.1308","DOIUrl":"10.1002/asl.1308","url":null,"abstract":"Previous studies on the South China Sea Summer Monsoon (SCSSM) mainly focused on a certain stage of its seasonal march. In this manuscript, we consider the monsoon onset and retreat as a whole and analyze the duration of the SCSSM and the monsoonal rainfall. We first verify the reasonableness of the SCSSM onset and retreat dates derived from the National Climate Center of China Meteorological Administration, and thus obtain the monsoon duration. Direct validation shows that longer SCSSM durations are associated with the anomalous westerly wind and warm–humid airmass, and vice versa, and thus the monsoon duration is trustworthy. The SCSSM duration shows remarkable low-frequency variations after the mid-2000s (increasing from 25.2 pentads to 28.5 pentads), which is mainly associated with the interdecadal delayed monsoon retreat. Corresponding to the extension of SCSSM duration by more than half a month, the monsoonal rainfall across the East Asia–western North Pacific also shows a significant increase. Compared to the traditional summertime rainfall over a fixed period (i.e., from May to September), our newly defined monsoonal rainfall (i.e., total rainfall within the monsoon duration) may be more physically meaningful and reflective of climatic changes.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Capturing Subgrid Cold Pool Dynamics With U-Net: Insights From Large-Eddy Simulation for Storm-Resolving Modeling 用U-Net捕获亚网格冷池动力学：来自大涡模拟的风暴解析建模的见解

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-07-03 DOI: 10.1002/asl.1309

Yi-Chang Chen, Chien-Ming Wu

{"title":"Capturing Subgrid Cold Pool Dynamics With U-Net: Insights From Large-Eddy Simulation for Storm-Resolving Modeling","authors":"Yi-Chang Chen, Chien-Ming Wu","doi":"10.1002/asl.1309","DOIUrl":"10.1002/asl.1309","url":null,"abstract":"This study explores the potential of deep learning as a subgrid parameterization for global storm-resolving models (GSRMs) by employing Large-Eddy Simulation (LES) to generate high-resolution cold pools under various convective structures. The high-resolution data is coarsened to 0.8, 1.6, 3.2, and 6.4 km to mimic the horizontal resolutions of GSRMs. U-Net deep learning models are developed to predict the high-resolution distribution of cold pools using coarsened near-surface (at height of 100 m) physical variables, including horizontal winds, potential temperature, and relative humidity. Results show that the U-Net models effectively capture cold pool characteristics, particularly their edges and intensity distribution at coarser scales. Additionally, high-resolution predictions provide enhanced information on horizontal heterogeneity that is not fully captured by low-resolution fields across different convective regimes. Sensitivity experiments indicate that U-Net prediction from input that includes wind fields outperforms those with thermodynamic variables only, highlighting the importance of accurately simulating dynamical variability in GSRMs. These findings can contribute to the advancement of improved subgrid machine-learning based parameterizations for next-generation atmospheric models.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1309","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144551044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation and Projection of Precipitation and Precipitation Extremes in the Source Region of the Yangtze and Yellow Rivers Based on CMIP6 Model Optimization and Statistical Downscaling 基于CMIP6模式优化和统计降尺度的长江黄河源区降水及极端降水评价与预估

IF 2 4区地球科学

Atmospheric Science Letters Pub Date : 2025-06-17 DOI: 10.1002/asl.1305

Rouke Li, Jia Wu, Ying Xu

{"title":"Evaluation and Projection of Precipitation and Precipitation Extremes in the Source Region of the Yangtze and Yellow Rivers Based on CMIP6 Model Optimization and Statistical Downscaling","authors":"Rouke Li, Jia Wu, Ying Xu","doi":"10.1002/asl.1305","DOIUrl":"10.1002/asl.1305","url":null,"abstract":"This study evaluated the performance of a high-resolution statistical downscaling (HSD) approach integrating optimal global climate models (GCMs) and quantile delta mapping (QDM) for the source region of the Yangtze and Yellow rivers, and then projected regional precipitation extremes. The GCMs captured the general precipitation pattern, but the results indicated systematic overestimations, particularly in eastern parts of the region, with deviations reaching 304.8% for winter. The HSD approach improved the spatial correlation coefficients (SCCs) and reduced the biases for mean precipitation and precipitation extremes, outperforming the GCMs with SCCs for annual precipitation of up to 0.87 and reduction in bias by 35%–60% in the simulation of extreme indices. Future projections revealed substantial reduction in consecutive dry days and pronounced increase in the annual total precipitation on wet days, annual count of wet days (precipitation ≥ 1 mm), and annual count of days with heavy precipitation (precipitation ≥ 10 mm) over the source region under different emission scenarios. Specifically, the latter demonstrated accelerated growth with enhanced greenhouse gas concentration, increasing by 14.5%, 39.9%, and 57.3% under shared socioeconomic pathway (SSP)126, SSP245, and SSP585, respectively, by the late 21st century. The findings of this study highlight the need for enhanced flood risk management strategies over the source region of the Yangtze and Yellow rivers to address the prospect of increased precipitation, and emphasize the critical role of coupling GCM optimization and QDM downscaling in generating reliable, high-resolution climate projections over regions of complex terrain.","PeriodicalId":50734,"journal":{"name":"Atmospheric Science Letters","volume":"26 6","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/asl.1305","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0