Journal of Quantitative Spectroscopy & Radiative Transfer最新文献_第6页

Characteristics of photonic jet formed by an eccentrically coated dielectric sphere 偏心涂层介质球形成的光子射流的特性

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-01-04 DOI: 10.1016/j.jqsrt.2025.109340

Huiling Liu, Xingxing Han, Bei Zhao, Jing Shi, Le Zhu

引用次数: 0

Simulation of backscattering phase function with the geometric optics method using a paired ray-tracing technique 用配对光线追踪技术的几何光学方法模拟后向散射相函数

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-01-03 DOI: 10.1016/j.jqsrt.2025.109341

Chen Zhou , He Huang , Lei Bi

{"title":"Simulation of backscattering phase function with the geometric optics method using a paired ray-tracing technique","authors":"Chen Zhou , He Huang , Lei Bi","doi":"10.1016/j.jqsrt.2025.109341","DOIUrl":"10.1016/j.jqsrt.2025.109341","url":null,"abstract":"<div><div>Geometric optics methods with intensity mapping have been widely used to calculate the single-scattering properties of randomly oriented non-spherical particles with large size parameters, but the backscattering phase functions are often underestimated. The primary reason is that the coherent backscatter enhancement (CBE) is not addressed when the intensity mapping technique is used. In this paper, the phase difference between each pair of conjugate reversible rays is computed in the ray-tracing module of the improved geometric optics method (IGOM), and the effect of CBE is incorporated by considering the interference between conjugate rays. The phase functions of regular hexagons, roughened hexagons, and spheroids with different size parameters and refractive indices are simulated using both the original IGOM and the IGOM with CBE considered (IGOM-CBE), and the results are compared to rigorous numerical simulations that solve Maxwell's equations. The results show that the near-backscattering phase functions calculated with the IGOM-CBE are more consistent with rigorous numerical simulations for all cases, indicating that the paired ray-tracing process effectively improves the backscatter simulated by the geometric optics method.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"334 ","pages":"Article 109341"},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142967936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Saha–Boltzmann method in plasma diagnostics: What can we obtain from a strict approach? 血浆诊断中的Saha-Boltzmann方法：严格的方法能得到什么？

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-01-02 DOI: 10.1016/j.jqsrt.2024.109338

Luka Rajačić, Nikodin V. Nedić, Dejan Dojić, Miloš Skočić, Srdjan Bukvić

引用次数: 0

On a relationship between acoustical (more generally scalar) beam shape coefficients and electromagnetic beam shape coefficients of some T-matrix theories for structured beams 关于结构梁的一些t矩阵理论中声学（一般是标量）波束形状系数与电磁波束形状系数之间的关系

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2025-01-01 DOI: 10.1016/j.jqsrt.2024.109329

Gérard Gouesbet , Leonardo A. Ambrosio , Jianqi Shen

引用次数: 0

Global carbon monoxide retrieval from the hyperspectral infrared atmospheric sounder-II onboard FengYun-3E in a dawn-dusk sun-synchronous orbit 从黎明-黄昏太阳同步轨道上的风云- 3e上的高光谱红外大气探测仪- ii获取全球一氧化碳

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-30 DOI: 10.1016/j.jqsrt.2024.109336

Zhao-Cheng Zeng

{"title":"Global carbon monoxide retrieval from the hyperspectral infrared atmospheric sounder-II onboard FengYun-3E in a dawn-dusk sun-synchronous orbit","authors":"Zhao-Cheng Zeng","doi":"10.1016/j.jqsrt.2024.109336","DOIUrl":"10.1016/j.jqsrt.2024.109336","url":null,"abstract":"<div><div>This study presents an information content analysis of the retrieval of global carbon monoxide (CO) from the 2<sup>nd</sup> generation of Hyperspectral Infrared Atmospheric Sounder on board Fengyun-3E (FY-3E/HIRAS-II), which is the world's first dawn-dusk orbiting meteorological satellite for civilian use with equatorial overpass times at about 5:30am/pm. Using the distinctive absorption features of CO around 2145 cm-1 in the infrared band, a retrieval algorithm based on optimal estimation is first developed to retrieve the CO profiles from FY-3E/HIRAS-II. The thermal contrast, defined as the temperature difference between the surface and the lower atmosphere, is then examined for the FY-3E/HIRAS-II observations to investigate the potential sensitivity of the observations. Retrievals of CO columns on four representative days over four seasons reveal strong enhancements from global wildfire emissions. Furthermore, the information content from the spectra, quantified by the degree of freedom for signal (DOFS), is assessed using the retrievals. The retrievals are compared with model simulations, which show good agreement. Finally, synthetic experiments are performed to investigate the impacts of thermal contrast and the vertical structure of wildfire-induced CO enhancement on the observational sensitivity. The result highlights the effectiveness of observing wildfire-induced CO enhancement during the dawn and dusk hours, even when thermal contrast conditions are not favorable. This study demonstrates the capability of FY-3E/HIRAS-II to monitor global CO, which sheds light on the potential benefits of adding dawn-dusk orbit observations to the current global air quality observations from mid-morning and early-afternoon orbit constellations.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"333 ","pages":"Article 109336"},"PeriodicalIF":2.3,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric Chemistry Experiment (ACE) satellite observations of aerosols and SO2 emissions from the 2024 Ruang volcanic eruption 2024年阮氏火山喷发气溶胶和SO[公式省略]排放的大气化学实验（ACE）卫星观测

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-28 DOI: 10.1016/j.jqsrt.2024.109333

Randika Dodangodage , Peter F. Bernath , Matthew Wyatt , Chris Boone

引用次数: 0

Ro-vibrational levels of acetylene isotopologues calculated from new potential energy surface 由新势能面计算的乙炔同位素的反振动能级

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-28 DOI: 10.1016/j.jqsrt.2024.109337

Alexander E. Protasevich, Andrei V. Nikitin

{"title":"Ro-vibrational levels of acetylene isotopologues calculated from new potential energy surface","authors":"Alexander E. Protasevich, Andrei V. Nikitin","doi":"10.1016/j.jqsrt.2024.109337","DOIUrl":"10.1016/j.jqsrt.2024.109337","url":null,"abstract":"<div><div>Ro-vibrational energy levels of acetylene isotopologues are reported using variational nuclear motion calculations from empirically optimized full six-dimensional potential energy surface (PES) in the ground electronic state. This surface is based on pure ab initio PES of H<sup>12</sup>C<sup>12</sup>CH which took into account the triple, quadruple and quintuple excitations as well as relativistic and diagonal Born-Oppenheimer corrections (DBOC). Variational calculations of the motion of nuclei for all isotopologues were carried out using one exact kinetic energy operator in which only the masses of the atoms were changed. Experimental values of 1529 ro-vibrational levels up to <em>J</em> = 10 of the main isotopologue were used to empirically adjust some 58 lower-order parameters of the PES. The unweighted average RMS for empirically optimized PES is 0.0953 cm<sup>−1</sup>. Ro-vibrational energy levels of H<sup>12</sup>C<sup>12</sup>CH, H<sup>13</sup>C<sup>13</sup>CH, D<sup>12</sup>C<sup>12</sup>CD, D<sup>13</sup>C<sup>13</sup>CD, H<sup>12</sup>C<sup>13</sup>CH, H<sup>12</sup>C<sup>12</sup>CD, H<sup>12</sup>C<sup>13</sup>CD, H<sup>13</sup>C<sup>12</sup>CD, D<sup>12</sup>C<sup>13</sup>CD up to <em>J</em> = 10 were calculated in the ground electronic state. Calculated ro-vibrational energy levels of H<sup>12</sup>C<sup>12</sup>CH, H<sup>13</sup>C<sup>13</sup>CH, D<sup>12</sup>C<sup>12</sup>CD, H<sup>12</sup>C<sup>13</sup>CH, H<sup>12</sup>C<sup>12</sup>CD isotopologues were compared with high precision empirical energy levels available in literature.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"333 ","pages":"Article 109337"},"PeriodicalIF":2.3,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The contribution of scattered radiation to the upward radiance of a city 散射辐射对城市向上辐射的贡献

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-26 DOI: 10.1016/j.jqsrt.2024.109330

Jaromír Petržala, Ladislav Kómar

{"title":"The contribution of scattered radiation to the upward radiance of a city","authors":"Jaromír Petržala, Ladislav Kómar","doi":"10.1016/j.jqsrt.2024.109330","DOIUrl":"10.1016/j.jqsrt.2024.109330","url":null,"abstract":"<div><div>Remote sensing of nighttime urban light emissions becomes a common part of light pollution modeling. Radiance data gathered by various satellites scanning the Earth surface serve as important inputs for estimating the upward luminous flux of a city, which then allows to evaluate the level of light pollution in its surroundings. The easiest way is to assume the measured radiance of a city pixel as belonging to its direct radiation. However, this radiance is ”contaminated” by scattered radiation coming from the light emitting surroundings of the pixel. In principle, this diffuse light contribution can influence the estimate of the emitted flux. In this paper, we developed a model to assess how important such a contribution can be for cities of different shapes and sizes. The numerical simulations for real city patterns obtained from the VIIRS-DNB database reveal, that scattered radiation could make up on average about 10%–20% of the total upward radiance of a pixel under quite obvious aerosol conditions. We have also derived two simplified models for idealized city patterns which enable relatively simple estimation of the diffuse radiation contribution without the need of complex simulations for realistic cities.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"333 ","pages":"Article 109330"},"PeriodicalIF":2.3,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global distributions of multi-layer and multi-phase clouds and their cloud radiative effects 多层多相云的全球分布及其云辐射效应

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-26 DOI: 10.1016/j.jqsrt.2024.109334

Bingqi Yi , Ruiyi Li , Zhiyong Yang

{"title":"Global distributions of multi-layer and multi-phase clouds and their cloud radiative effects","authors":"Bingqi Yi , Ruiyi Li , Zhiyong Yang","doi":"10.1016/j.jqsrt.2024.109334","DOIUrl":"10.1016/j.jqsrt.2024.109334","url":null,"abstract":"<div><div>Accurate and reliable knowledge about how clouds with various layers and phases are vertically and horizontally distributed over the globe has been lacking, which hinders the understanding about the impacts of various sub-types of clouds. This study utilizes the cloud retrieval products from the CloudSat/CALIPSO satellite observations from 2007 to 2010 to analyze the global distributions of multi-layer and multi-phase clouds as well as their cloud radiative effects (CRE) at the top of the atmosphere (TOA), at the surface, and within the atmosphere. We separate and aggregate cloudy satellite footprints by the number of cloud layers, and further consider the different combinations of cloud phases for the one-layer and multi-layer clouds. The globally averaged total cloud fraction is 72.52 %, with the one-layer and multi-layer clouds take up 49.39 % and 23.13 %, respectively. The one-layer water, ice, and mixed-phase cloud fractions are 21.93 %, 19.42 %, and 8.04 %, respectively. The two-layer and three-layer clouds most frequently occur with one ice layer at the top. The heights of cloud top and bottom as well as the cloud thickness are correspondingly derived for all sub-types of clouds. The globally averaged TOA net total CRE is −18.25 W m<sup>−2</sup>, with −14.63 W m<sup>−2</sup> attributed to one-layer clouds and −3.62 W m<sup>−2</sup> to multi-layer clouds. At the surface, the global annual average net total CRE is −25.01 W m<sup>−2</sup>, and the one-layer and multi-layer clouds contribute −17.24 W m<sup>−2</sup> and −7.77 W m<sup>−2</sup>, respectively. Clouds generally exert a net heating effect within the atmosphere. Our findings provide valuable insights into the detailed layer and phase structures of clouds and could serve as the reference for evaluating cloud structure and radiation simulations.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"333 ","pages":"Article 109334"},"PeriodicalIF":2.3,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Absorption spectroscopy of AlO including photodissociation 含光解作用的AlO吸收光谱

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-25 DOI: 10.1016/j.jqsrt.2024.109335

Tianrui Bai , Lynette Edline Momo Jeulefack , Songfeng Li , Jie Cheng , Shuidong Dai , Linhua Liu , Fei Li

{"title":"Absorption spectroscopy of AlO including photodissociation","authors":"Tianrui Bai , Lynette Edline Momo Jeulefack , Songfeng Li , Jie Cheng , Shuidong Dai , Linhua Liu , Fei Li","doi":"10.1016/j.jqsrt.2024.109335","DOIUrl":"10.1016/j.jqsrt.2024.109335","url":null,"abstract":"<div><div>Photodissociation of AlO may be important for the aluminium chemistry in various astrophysical regions. The photodissociation cross sections and rates of AlO were investigated over the temperature range from 0 to 15000 K in this work. Firstly, the state-resolved cross sections at the wavelength of 50 − 5000 nm for transitions from the ground and first excited states were calculated using <em>ab initio</em> potential energy curves and transition dipole moments. The temperature-dependent cross sections were then obtained by assuming a Boltzmann distribution to describe the population of the initial state. Several common radiation fields (interstellar, solar and blackbody radiation field) were selected as the radiation fields, and then the photodissociation rates in different radiation fields were obtained. The photodissociation rates in all studied radiation fields exhibit a positive correlation with increasing temperature. This finding indicates that the total photodissociation rates are sensitive to the temperature. In addition, the photodissociation rates in the solar radiation field are higher than those in the interstellar radiation fields, indicating that photodissociation rate is associated with the type of radiation field in which the molecule is exposed. The calculated photodissociation cross sections and rates of AlO are useful to investigate the chemical evolution of the aluminum element in the interstellar environment.</div></div>","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"333 ","pages":"Article 109335"},"PeriodicalIF":2.3,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142929291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0