Journal of Geophysical Research: Atmospheres最新文献_第10页

Quantification of Critical Thresholds in Soil Moisture and the Leaf Area Index Regulating Aeolian Dust Events: A Sensitivity Analysis of the Response of Aeolian Dust Events to Wind Velocity Variations 土壤湿度和叶面积指数调节风沙事件临界阈值的量化：风沙事件对风速变化响应的敏感性分析

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-10 DOI: 10.1029/2025JD044005

Zhishan Xia, Xuesong Wang, Chunlai Zhang

{"title":"Quantification of Critical Thresholds in Soil Moisture and the Leaf Area Index Regulating Aeolian Dust Events: A Sensitivity Analysis of the Response of Aeolian Dust Events to Wind Velocity Variations","authors":"Zhishan Xia, Xuesong Wang, Chunlai Zhang","doi":"10.1029/2025JD044005","DOIUrl":"10.1029/2025JD044005","url":null,"abstract":"Elucidating the sensitivity of aeolian dust events to wind velocity variations is crucial for projecting future dust emissions patterns within the context of climate variability. However, a global distribution of this sensitivity with observational constraints that may be implemented in climate models remain inadequately explored. Using long-term satellite observations spanning 2003–2017, we propose an empirical methodology to assess the sensitivity of aeolian dust events to variations in wind velocity. Subsequently, we quantitatively analyze the relationships between this sensitivity and two key influential factors: soil moisture (SM) content and the leaf area index (LAI). Our findings reveal a global mean sensitivity of 0.06 s m−1, indicating that the dust optical depth would change by 0.06 s m−1 under one wind velocity unit variation. Dust events exhibit negligible sensitivity to variations in wind velocity when the SM exceeds 0.17 m3 m−3 or the LAI exceeds 0.45 m2 m−2, which means that dust emission processes are effectively constrained under these conditions. Furthermore, employing these critical thresholds, we compute the fraction of days with constrained dust events. We show that under four shared socioeconomic pathways (SSPs) (SSP126, SSP245, SSP370, and SSP585), areas experiencing an increase in constrained days and those experiencing a decrease account for approximately 10.6%–12.5% and 9.3%–10.3% of the global land area, respectively.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 18","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of Precipitating Marine Low-Altitude Water Clouds by CALIPSO: Observations and Detections 用CALIPSO识别海洋低空降水水云：观测和探测

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-09 DOI: 10.1029/2025JD043401

Shan Zeng, Yongxiang Hu, Mark Vaughan, Charles Trepte, Zhaoyan Liu, Ali Omar, Brian Getzewich, Sharon Rodier

{"title":"Identification of Precipitating Marine Low-Altitude Water Clouds by CALIPSO: Observations and Detections","authors":"Shan Zeng, Yongxiang Hu, Mark Vaughan, Charles Trepte, Zhaoyan Liu, Ali Omar, Brian Getzewich, Sharon Rodier","doi":"10.1029/2025JD043401","DOIUrl":"10.1029/2025JD043401","url":null,"abstract":"Marine boundary layer (MBL) clouds and their precipitation are crucial in regulating the Earth's radiation budget. In this study, we use measurements from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) to investigate how the microphysical and optical properties of MBL clouds change at the cloud top when precipitation forms. These changes include (a) broadening of particle size distributions when transitioning from cloud droplets to raindrops, as evidenced by a pronounced decrease in the cloud extinction-to-backscatter ratios; (b) lower droplet number concentrations, resulting in reduced in-cloud signal attenuation, smaller backscatter coefficients, lower depolarization ratios, and deeper signal penetration into clouds; and (c) increased cloud inhomogeneity, arising from significant spatial variability in droplet size and number concentrations that yield corresponding variations in lidar backscatter signal intensities. The distinct differences observed in CALIOP measurements of precipitating and non-precipitating clouds allow for effective discrimination between the two states. Independent detections of precipitating clouds from space-borne lidar are expected to provide new insights into cloud life cycles and enhance the existing A-Train data record by filling many of the existing gaps in global-scale light precipitation detection.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JD043401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

ICESat-2 Lidar Estimates of Clear-Sky Precipitation Over the East Antarctic Plateau 南极东部高原晴空降水的ICESat-2激光雷达估算

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-08 DOI: 10.1029/2025JD044120

Stephen P. Palm, Yuekui Yang

{"title":"ICESat-2 Lidar Estimates of Clear-Sky Precipitation Over the East Antarctic Plateau","authors":"Stephen P. Palm, Yuekui Yang","doi":"10.1029/2025JD044120","DOIUrl":"10.1029/2025JD044120","url":null,"abstract":"Precipitation over Antarctica plays a critical role in determining the mass balance of the ice sheet, yet it remains poorly quantified due to the harsh environment and sparse number of observations. Over the East Antarctic Plateau, clear-sky precipitation (CSP) is a significant portion of the total annual precipitation. CSP consists of very small ice crystals that form when the air becomes supersaturated and settles to the surface. This study presents the first continental-scale estimates of CSP over the East Antarctic Plateau using atmospheric backscatter profiles from the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) lidar. A method is developed to identify CSP based on calibrated attenuated backscatter and to estimate the associated precipitation amounts by deriving ice water content from lidar extinction and using an estimated particle fall speed to obtain precipitation rate. Comparisons with in situ measurements at Concordia Station, Dome C show general agreement. Results for the April–October 2021 period reveal a high frequency of CSP (up to 80%) across the high Plateau. The ICESat-2 estimated CSP amount for this period ranges from about 5 to 8 mm snow water equivalent (SWE) south of about 80S and increases toward the north with maximum values of 18–20 mm SWE near 70S, 90E. The ICEsat-2 estimated CSP amount for the grid box containing Dome C was 8.5 mm SWE which agrees well with the amount measured there (9.9 mm SWE). These findings demonstrate the unique ability of ICESat-2 to detect and quantify CSP, offering new insight into Antarctic precipitation and providing a valuable data set for evaluating the surface mass balance of Antarctica.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JD044120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Large-Eddy Simulation of the Spray-Laden Hurricane Boundary Layer: I. Spray Transport and Statistics 带喷雾的飓风边界层大涡模拟：1 .喷雾输送与统计

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-08 DOI: 10.1029/2025JD044054

David H. Richter, George H. Bryan, John Dennis, Jian Sun, Sheri Voelz

{"title":"Large-Eddy Simulation of the Spray-Laden Hurricane Boundary Layer: I. Spray Transport and Statistics","authors":"David H. Richter, George H. Bryan, John Dennis, Jian Sun, Sheri Voelz","doi":"10.1029/2025JD044054","DOIUrl":"10.1029/2025JD044054","url":null,"abstract":"For decades, theoretical, observational, numerical, and experimental efforts have sought to quantify the behavior of sea spray in the high-wind boundary layer. A persistent problem, however, is that it is notoriously difficult to examine spray effects directly: observations are scarce, and numerical simulations are often idealized or lacking in a full representation of the physical processes involved. In this study, we provide the most complete treatment of spray transport and coupling with the hurricane boundary layer to-date by conducting high-resolution large-eddy simulations coupled with Lagrangian spray droplets across a range of wind speed using a GPU-accelerated model. In this first of a two-part work, we describe the turbulence, the impacts of spray on mean profiles, and the dispersion of spray throughout the boundary layer. Spray has minimal impacts on the velocity and turbulence statistics, while at the same time having a much more pronounced influence on profiles of temperature and water vapor. Droplet concentrations roughly follow the conventional power-law shape above the droplet injection layer, although almost universally over predict the droplet number concentrations. The Lagrangian lifetime statistics are computed as well, and it is shown that estimates based on a droplet falling at its Stokes terminal velocity from the significant wave height is inaccurate and cannot capture the wide range of possible droplet lifetimes.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JD044054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A Mesoscale-to-LES Modeling of Tornado-Like Vortex and Associated Local Strong Winds in Urban Area 城市地区龙卷风样涡旋及相关局地强风的中尺度- les模拟

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-08 DOI: 10.1029/2025JD044574

Xiangrui Kong, Guixing Chen, Lanqiang Bai, Lingkun Ran, Shaoting Zhang, Zhiyong Meng

{"title":"A Mesoscale-to-LES Modeling of Tornado-Like Vortex and Associated Local Strong Winds in Urban Area","authors":"Xiangrui Kong, Guixing Chen, Lanqiang Bai, Lingkun Ran, Shaoting Zhang, Zhiyong Meng","doi":"10.1029/2025JD044574","DOIUrl":"10.1029/2025JD044574","url":null,"abstract":"Tornadoes in urban areas pose a great threat to local residents and buildings. The tornado's fine-scale dynamic structures in turn can be disturbed by these buildings. This study employs an advanced modeling system of mesoscale-to-large eddy simulation (LES) to explicitly resolve both the tornado-like vortex (TLV) and building-induced flow disturbances. Our modeling reasonably reproduced a TLV passing over building clusters, while the evolutionary characteristics of TLV are comparable to that of the video-captured tornado funnels of an actual event in South China. The structures of the TLV are significantly disturbed as it approaches high-rise building clusters. After arriving at the downstream of the building cluster, the disturbed TLV regains a well-defined structure. Such a reconstruction of TLV structures is characterized by the vertical alignment of the original aloft TLV structures and low-level building-induced lee vortex. As the TLV detaches the building cluster, it leaves open space for a wind corridor, a band area of high wind speeds along the direction of ambient flow in the open area among building clusters. This corridor delivers momentum that, when coupled with the reconstruction of TLV, favors local strong winds. Such a type of local strong winds are highly related to the heights of building clusters but are somewhat less sensitive to the detailed TLV track relative to building clusters, as indicated by numerical sensitivity experiments. These results provide insight into possible wind speed changes when tornadoes encounter buildings, which may have valuable implications for urban wind hazard mitigation.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Dynamic Downscaling on the Simulation of Tropical Easterly Waves in the Intra-Americas Seas 动力降尺度对美洲内海域热带东风波模拟的影响

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-07 DOI: 10.1029/2025JD043454

Connor DeLaune, Vasubandhu Misra, C. B. Jayasankar

{"title":"Impact of Dynamic Downscaling on the Simulation of Tropical Easterly Waves in the Intra-Americas Seas","authors":"Connor DeLaune, Vasubandhu Misra, C. B. Jayasankar","doi":"10.1029/2025JD043454","DOIUrl":"10.1029/2025JD043454","url":null,"abstract":"We analyze two 16-year dynamically downscaled simulations for their Tropical Easterly Waves (TEWs) from global reanalysis of the atmosphere and ocean over the Intra-Americas Seas (IAS) region, centered over Central America. We implemented two versions of a coupled ocean-atmosphere Regional Climate Model (RCM), each run at 15 km grid resolution and differing solely in their cumulus parameterization schemes. Our analysis reveals that the RCMs were able to generate TEWs in the domain even though the global atmospheric reanalysis forcing the regional models generated a few TEWs. This seems to suggest an in situ generation of these TEWs in the domain, which is consistent with earlier studies that examined TEW over the IAS region. There were also crucial differences between the two versions of the RCMs, suggesting that the cumulus parameterization scheme has an important bearing on the generation of TEWs in the simulation over this region. In one instance of the RCM simulation, the response of the TEW was much stronger, where the convective activity was enhanced with both convective and stratiform precipitation associated with TEW higher than the other cumulus scheme used in the other RCM simulation. However, the limitations and advantages of the impacts of the two cumulus parameterization schemes on the overall simulation of TEWs refrain us from claiming one scheme is superior to the other. Nonetheless, the study highlights the importance of the cumulus scheme and the benefit of dynamic downscaling on the simulation of TEWs.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Impact of the Vertical Structure of Stratospheric Zonal Wind on Interannual Variability of Precipitation in the Tropics 平流层纬向风垂直结构对热带降水年际变化的影响

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-07 DOI: 10.1029/2025JD043558

Ying Wang, Jiali Luo, Ran Duan, Xinglin Bao, Fei Xie, Fuhai Luo, Yan Xia

{"title":"The Impact of the Vertical Structure of Stratospheric Zonal Wind on Interannual Variability of Precipitation in the Tropics","authors":"Ying Wang, Jiali Luo, Ran Duan, Xinglin Bao, Fei Xie, Fuhai Luo, Yan Xia","doi":"10.1029/2025JD043558","DOIUrl":"10.1029/2025JD043558","url":null,"abstract":"Previous studies have emphasized the role of the stratospheric Quasi-Biennial Oscillation (QBO) in modulating tropical precipitation. However, the relationship between precipitation and QBO index at different stratospheric levels is inconsistent. This study identifies two distinct vertical structures of stratospheric zonal wind that influence precipitation in the tropics: (a) westerlies at 50 and 70 hPa combined with easterlies above 50 hPa generate warm anomalies near the tropopause; (b) easterlies at 20–70 hPa paired with westerlies at 10 hPa induce strong cold anomalies near the tropopause. Temperature anomalies affect atmospheric static stability, with negative anomalies increasing high cloud cover and strengthening convection. Additionally, the large-scale circulation links stratospheric zonal winds to deep convection. The vertical structure of the stratospheric zonal wind influences the intensity and positioning of the Hadley and Walker circulations, thereby shaping the spatial distribution of tropical precipitation. A linear combination of time series from these two wind structures explains a significant part of interannual tropical precipitation variability after removing the El Niño-Southern Oscillation signal. Evaluation of 15 Phase 6 of the International Coupled Model Intercomparison Project models shows that eight reproduce the observed relationship between stratospheric wind structures and tropical precipitation with reasonable accuracy. The vertical structure of stratospheric zonal wind exerts a significant influence on tropical precipitation patterns.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145012526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of CCCma Radiative Transfer Calculations for Low-Level Overcast Liquid Clouds Over ARM SGP and ENA Sites ARM SGP和ENA站点低空阴云液体云的CCCma辐射传输计算分析

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-06 DOI: 10.1029/2025JD044121

Jordann Brendecke, Xiquan Dong, Baike Xi, Xiang Zhong, Howard W. Barker, Jiangnan Li, Peter Pilewskie

{"title":"Analysis of CCCma Radiative Transfer Calculations for Low-Level Overcast Liquid Clouds Over ARM SGP and ENA Sites","authors":"Jordann Brendecke, Xiquan Dong, Baike Xi, Xiang Zhong, Howard W. Barker, Jiangnan Li, Peter Pilewskie","doi":"10.1029/2025JD044121","DOIUrl":"10.1029/2025JD044121","url":null,"abstract":"This study uses the Canadian Centre for Climate Modeling and Analysis (CCCma) radiative transfer model to estimate shortwave flux for low-level overcast liquid clouds. Calculations are evaluated against measurements at the Atmospheric Radiation Measurement Southern Great Plains (SGP, land) and Eastern North Atlantic (ENA, ocean) sites, as well as top of atmosphere (TOA) fluxes inferred from Clouds and Earth's Radiant Energy System (CERES) from 2014 to 2023. Mean observed surface (TOA) SW fluxes for the selected cases are 235.7 W m−2 (473.8 W m−2) at SGP and 348.7 W m−2 (356.4 W m−2) at ENA. Cloud microphysical properties retrieved from CERES MODIS are input into the CCCma using three assumed profiles: (a) cloud droplet effective radius (re) and liquid water content (LWC) constant with height, (b) LWC and re increasing linearly with height, and (c) LWC and re increasing linearly from cloud base to ¾ height and then decreasing linearly up to cloud top. Overall, Method 3 produces the least error variance at both sites. At SGP, mean bias and root mean square error (RMSE) are −5.0 and 44.6 W m−2 at the surface and −4.6 and 25.4 W m−2 at TOA. At ENA, errors are +0.2 and 121.3 W m−2 at the surface and −8.0 and 26.1 W m−2 at TOA. Further screening cases with good agreement between satellite- and surface-based cloud properties, RMSEs for surface fluxes decrease to 24.3 and 25.8 W m−2 at SGP and ENA. Comparisons with CERES Fu-Liou calculations showed overall better performance by the CCCma, especially at ENA.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heatwaves on the Rise: The Role of El Niño-Southern Oscillation and Local Water-Energy Exchanges in Shaping Global Patterns 热浪上升：El Niño-Southern振荡和局部水-能交换在塑造全球模式中的作用

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-05 DOI: 10.1029/2024JD042446

Kun Zhang, Jinbao Li, Zhengfei Guo, Shuwen Liu, Gaofeng Zhu, Shasha Shang, Jie Zhang, Michael K. Ng, Jin Wu

{"title":"Heatwaves on the Rise: The Role of El Niño-Southern Oscillation and Local Water-Energy Exchanges in Shaping Global Patterns","authors":"Kun Zhang, Jinbao Li, Zhengfei Guo, Shuwen Liu, Gaofeng Zhu, Shasha Shang, Jie Zhang, Michael K. Ng, Jin Wu","doi":"10.1029/2024JD042446","DOIUrl":"10.1029/2024JD042446","url":null,"abstract":"Large-scale and intense heatwaves pose significant risks to ecosystems and human society due to associated heat and water stress. Heatwaves can be classified as daytime, nighttime, and compound, depending on their occurrence time. However, the factors shaping global spatiotemporal patterns of heatwaves remain poorly understood, especially regarding links to large-scale climate mode and local water-energy (LWE) exchange. Here, we analyzed the frequency and intensity of these three heatwave types from 1980 to 2022 using ERA5L air temperature data and examined their associations with the El Niño–Southern Oscillation (ENSO) and LWE-related factors through the LSTM model. Our results show a significant global increase in all types of heatwaves. Compound heatwaves exhibited higher annual frequency and intensity than individual daytime or nighttime events. The three types of heatwaves displayed distinct associations with El Niño and La Niña episodes, with the tropics experiencing the most frequent and intense heatwaves during El Niño years. Meanwhile, terrestrial LWE exchange significantly influenced heatwave development, with stronger effects in dryland and temperate zones than in continental and polar regions. These findings highlight the importance of ENSO and LWE exchanges in shaping heatwave patterns and suggest that future forecasts should consider the temporal evolution and fluctuations in heat accumulation to improve accuracy and reliability.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2024JD042446","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Optimizing Retrieval of Boundary Layer Temperature and Humidity Profiles From Geostationary Hyperspectral Sounder by Integrating Ground Station Observations 结合地面站观测优化同步高光谱测深反演边界层温湿度廓线

IF 3.4 2区地球科学

Journal of Geophysical Research: Atmospheres Pub Date : 2025-09-05 DOI: 10.1029/2025JD044090

Pengyu Huang, Min Min, Bo Li, Jing Zheng, Di Di, Zhenglong Li, Jun Li

{"title":"Optimizing Retrieval of Boundary Layer Temperature and Humidity Profiles From Geostationary Hyperspectral Sounder by Integrating Ground Station Observations","authors":"Pengyu Huang, Min Min, Bo Li, Jing Zheng, Di Di, Zhenglong Li, Jun Li","doi":"10.1029/2025JD044090","DOIUrl":"10.1029/2025JD044090","url":null,"abstract":"Geostationary satellite based hyperspectral infrared (IR) sounders enable continuous measuring weather cube of atmospheric temperature and humidity. Nevertheless, the uncertainties of temperature and humidity profiles in the boundary layer from the sounders are relatively large due to the difficulty on distinguishing surface contributions from radiances measured by low-peaking channels, which limits the quantitative applications. Since the dense ground stations provide rich 2-m temperature and moisture observations near continuously, although those observations do not contain vertical profile information directly, integration together with sounder measurements can improve the boundary layer profiling. Using Geostationary Interferometric Infrared Sounder (GIIRS) onboard Fengyun-4B (FY-4B) as a precursor geostationary sounder through theoretical analysis, simulation, and real data experiments using the optimal estimation method, it is found that integration of ground station observations and satellite sounder measurements can substantially reduce errors by 0.3 K and 2% (absolute) for temperature and humidity, respectively, in the boundary layer, highlighting the value of integrating geostationary hyperspectral IR measurements with ground station observations for quantitative applications such as nowcasting the high impact weather events in near real time.","PeriodicalId":15986,"journal":{"name":"Journal of Geophysical Research: Atmospheres","volume":"130 17","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0