Assessment of Geostationary Satellite Cloud Effective Radius over East China with In Situ Aircraft Measurements.
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| Title: | Assessment of Geostationary Satellite Cloud Effective Radius over East China with In Situ Aircraft Measurements. |
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| Authors: | Zhang, Qiuli1 (AUTHOR), Liu, Chao1 (AUTHOR) chao_liu@nuist.edu.cn, Zhang, Rong2 (AUTHOR), Yang, Jing1 (AUTHOR), Li, Junxia2 (AUTHOR), Li, Bo3 (AUTHOR), Lu, Feng3 (AUTHOR), Yin, Yan1 (AUTHOR), Jin, Hongchun4 (AUTHOR) |
| Source: | Journal of Meteorological Research. Apr2025, Vol. 39 Issue 2, p240-251. 12p. |
| Subject Terms: | *Weather control, *Stratus clouds, *Root-mean-squares, *Remote sensing, *Microphysics, *Geostationary satellites |
| Abstract (English): | Cloud effective radius (CER) is a fundamental microphysical property of clouds, critical for understanding cloud formation and radiative effects. Satellite spectral imagers, widely utilized in passive remote sensing, facilitate the monitoring of cloud characteristics, including CER, over extended time periods and spatial scales. Various observational methods have been employed to evaluate satellite cloud property products; however, in situ measurement evaluations of CER remain limited, particularly for products over China. This study utilized aircraft observations provided by the China Meteorological Administration Weather Modification Centre to evaluate the CER retrieved by Fengyun-4A Advanced Geosynchronous Radiation Imager (AGRI) and Himawari-8 Advanced Himawari Imager (AHI). Three flights were selected from the aircraft dataset for evaluation, involving flights through non-precipitating stratiform clouds with stable, high-quality measurements. Rigorous data selection and collocation procedures were employed to ensure a comprehensive comparison. Satellite retrievals from heterogeneous cloud fields were excluded, and representative in-cloud aircraft measurements were identified through multi-parameter filtering. The flight trajectory was adjusted to account for horizontal cloud movement corresponding to time differences between observations from different platforms. Additionally, in situ measurements from different vertical layers were adjusted to a comparable position near the cloud top. Results indicate that CER retrieved from satellites is generally overestimated compared to in situ measurements. For AGRI, the average difference (AD) is 2.90 µm, with a root mean square difference (RMSD) of 3.53 µm. For AHI, the AD is 2.92 µm, and the RMSD is 3.59 µm. To enhance future validation and evaluation of remote sensing results, factors such as instrument calibration, flight patterns, and cloud conditions will be carefully considered. Increasing the number of cases should further reduce errors associated with individual instances, enabling more precise assessments. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): | 摘要: 云有效半径 (CER) 对于云的形成和辐射效应至关重要。 卫星光谱成像仪有助于在长时间序列和大空间范围监测云特征, 包括 CER。目前已有多种观测方法评估卫星云产品, 但针对中国上空 CER 产品的原位测量评估仍有限。 本文利用中国气象局人工影响天气中心提供的飞机原位测量, 对 FY-4A 先进地球同步辐射成像仪 (AGRI) 和 Himawari-8 卫星先进成像仪 (AHI) 反演的 CER 进行评估。 选取了三个针对无降水层云, 测量结果稳定且数据质量高的个例进行评估。 实验中排除了异质云场的卫星数据, 并通过多参数选定代表性原位样本。 调整了飞行轨迹以适应时间差内的云水平移动, 并将不同垂直层的原位测量调整到云顶附近的可比位置。 与原位测量相比, 卫星反演的 CER 被高估。 对于 AGRI/AHI, 平均差 (AD) 为 2.90/2.92 µm, 均方根差 (RMSD) 为 3.53/3.59 µm。 未来为加强对遥感结果的验证和评估, 将仔细考虑仪器校准、飞行模式和云条件等因素。 增加个例数量以进一步减少与个别案例相关的错误, 从而实现更精确的评估。 [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 184747060 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Assessment of Geostationary Satellite Cloud Effective Radius over East China with In Situ Aircraft Measurements. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Qiuli%22">Zhang, Qiuli</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Chao%22">Liu, Chao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chao_liu@nuist.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Rong%22">Zhang, Rong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Jing%22">Yang, Jing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Junxia%22">Li, Junxia</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Bo%22">Li, Bo</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Feng%22">Lu, Feng</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yin%2C+Yan%22">Yin, Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jin%2C+Hongchun%22">Jin, Hongchun</searchLink><relatesTo>4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Meteorological+Research%22">Journal of Meteorological Research</searchLink>. Apr2025, Vol. 39 Issue 2, p240-251. 12p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Weather+control%22">Weather control</searchLink><br />*<searchLink fieldCode="DE" term="%22Stratus+clouds%22">Stratus clouds</searchLink><br />*<searchLink fieldCode="DE" term="%22Root-mean-squares%22">Root-mean-squares</searchLink><br />*<searchLink fieldCode="DE" term="%22Remote+sensing%22">Remote sensing</searchLink><br />*<searchLink fieldCode="DE" term="%22Microphysics%22">Microphysics</searchLink><br />*<searchLink fieldCode="DE" term="%22Geostationary+satellites%22">Geostationary satellites</searchLink> – Name: Abstract Label: Abstract (English) Group: Ab Data: Cloud effective radius (CER) is a fundamental microphysical property of clouds, critical for understanding cloud formation and radiative effects. Satellite spectral imagers, widely utilized in passive remote sensing, facilitate the monitoring of cloud characteristics, including CER, over extended time periods and spatial scales. Various observational methods have been employed to evaluate satellite cloud property products; however, in situ measurement evaluations of CER remain limited, particularly for products over China. This study utilized aircraft observations provided by the China Meteorological Administration Weather Modification Centre to evaluate the CER retrieved by Fengyun-4A Advanced Geosynchronous Radiation Imager (AGRI) and Himawari-8 Advanced Himawari Imager (AHI). Three flights were selected from the aircraft dataset for evaluation, involving flights through non-precipitating stratiform clouds with stable, high-quality measurements. Rigorous data selection and collocation procedures were employed to ensure a comprehensive comparison. Satellite retrievals from heterogeneous cloud fields were excluded, and representative in-cloud aircraft measurements were identified through multi-parameter filtering. The flight trajectory was adjusted to account for horizontal cloud movement corresponding to time differences between observations from different platforms. Additionally, in situ measurements from different vertical layers were adjusted to a comparable position near the cloud top. Results indicate that CER retrieved from satellites is generally overestimated compared to in situ measurements. For AGRI, the average difference (AD) is 2.90 µm, with a root mean square difference (RMSD) of 3.53 µm. For AHI, the AD is 2.92 µm, and the RMSD is 3.59 µm. To enhance future validation and evaluation of remote sensing results, factors such as instrument calibration, flight patterns, and cloud conditions will be carefully considered. Increasing the number of cases should further reduce errors associated with individual instances, enabling more precise assessments. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Abstract (Chinese) Group: Ab Data: 摘要: 云有效半径 (CER) 对于云的形成和辐射效应至关重要。 卫星光谱成像仪有助于在长时间序列和大空间范围监测云特征, 包括 CER。目前已有多种观测方法评估卫星云产品, 但针对中国上空 CER 产品的原位测量评估仍有限。 本文利用中国气象局人工影响天气中心提供的飞机原位测量, 对 FY-4A 先进地球同步辐射成像仪 (AGRI) 和 Himawari-8 卫星先进成像仪 (AHI) 反演的 CER 进行评估。 选取了三个针对无降水层云, 测量结果稳定且数据质量高的个例进行评估。 实验中排除了异质云场的卫星数据, 并通过多参数选定代表性原位样本。 调整了飞行轨迹以适应时间差内的云水平移动, 并将不同垂直层的原位测量调整到云顶附近的可比位置。 与原位测量相比, 卫星反演的 CER 被高估。 对于 AGRI/AHI, 平均差 (AD) 为 2.90/2.92 µm, 均方根差 (RMSD) 为 3.53/3.59 µm。 未来为加强对遥感结果的验证和评估, 将仔细考虑仪器校准、飞行模式和云条件等因素。 增加个例数量以进一步减少与个别案例相关的错误, 从而实现更精确的评估。 [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s13351-025-4164-8 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 240 Subjects: – SubjectFull: Weather control Type: general – SubjectFull: Stratus clouds Type: general – SubjectFull: Root-mean-squares Type: general – SubjectFull: Remote sensing Type: general – SubjectFull: Microphysics Type: general – SubjectFull: Geostationary satellites Type: general Titles: – TitleFull: Assessment of Geostationary Satellite Cloud Effective Radius over East China with In Situ Aircraft Measurements. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Qiuli – PersonEntity: Name: NameFull: Liu, Chao – PersonEntity: Name: NameFull: Zhang, Rong – PersonEntity: Name: NameFull: Yang, Jing – PersonEntity: Name: NameFull: Li, Junxia – PersonEntity: Name: NameFull: Li, Bo – PersonEntity: Name: NameFull: Lu, Feng – PersonEntity: Name: NameFull: Yin, Yan – PersonEntity: Name: NameFull: Jin, Hongchun IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20956037 Numbering: – Type: volume Value: 39 – Type: issue Value: 2 Titles: – TitleFull: Journal of Meteorological Research Type: main |
| ResultId | 1 |
